"""FastAPI route definitions."""

from pathlib import Path

from fastapi import APIRouter, HTTPException
from fastapi.responses import HTMLResponse
from pydantic import BaseModel

import atocore.config as _config
from atocore.context.builder import (
    build_context,
    get_last_context_pack,
    _pack_to_dict,
)
from atocore.context.project_state import (
    CATEGORIES,
    get_state,
    invalidate_state,
    set_state,
)
from atocore.ingestion.pipeline import (
    exclusive_ingestion,
    get_ingestion_stats,
    get_source_status,
    ingest_configured_sources,
    ingest_file,
    ingest_folder,
)
from atocore.interactions.service import (
    get_interaction,
    list_interactions,
    record_interaction,
)
from atocore.engineering.mirror import generate_project_overview
from atocore.engineering.wiki import (
    render_entity,
    render_homepage,
    render_project,
    render_search,
)
from atocore.engineering.service import (
    ENTITY_TYPES,
    RELATIONSHIP_TYPES,
    create_entity,
    create_relationship,
    get_entities,
    get_entity,
    get_entity_with_context,
    get_relationships,
)
from atocore.memory.extractor import (
    EXTRACTOR_VERSION,
    MemoryCandidate,
    extract_candidates_from_interaction,
)
from atocore.memory.extractor_llm import (
    LLM_EXTRACTOR_VERSION,
    _cli_available as _llm_cli_available,
    extract_candidates_llm,
)
from atocore.memory.reinforcement import reinforce_from_interaction
from atocore.memory.service import (
    MEMORY_STATUSES,
    MEMORY_TYPES,
    create_memory,
    get_memories,
    invalidate_memory,
    promote_memory,
    reject_candidate_memory,
    supersede_memory,
    update_memory,
)
from atocore.observability.logger import get_logger
from atocore.ops.backup import (
    cleanup_old_backups,
    create_runtime_backup,
    list_runtime_backups,
    validate_backup,
)
from atocore.projects.registry import (
    build_project_registration_proposal,
    get_project_registry_template,
    list_registered_projects,
    register_project,
    refresh_registered_project,
    update_project,
)
from atocore.retrieval.retriever import retrieve
from atocore.retrieval.vector_store import get_vector_store

router = APIRouter()
log = get_logger("api")


# --- Wiki routes (HTML, served first for clean URLs) ---


@router.get("/wiki", response_class=HTMLResponse)
def wiki_home() -> HTMLResponse:
    return HTMLResponse(content=render_homepage())


@router.get("/wiki/projects/{project_name}", response_class=HTMLResponse)
def wiki_project(project_name: str) -> HTMLResponse:
    from atocore.projects.registry import resolve_project_name as _resolve
    return HTMLResponse(content=render_project(_resolve(project_name)))


@router.get("/wiki/entities/{entity_id}", response_class=HTMLResponse)
def wiki_entity(entity_id: str) -> HTMLResponse:
    html = render_entity(entity_id)
    if html is None:
        raise HTTPException(status_code=404, detail="Entity not found")
    return HTMLResponse(content=html)


@router.get("/wiki/search", response_class=HTMLResponse)
def wiki_search(q: str = "") -> HTMLResponse:
    return HTMLResponse(content=render_search(q))


# --- Request/Response models ---


class IngestRequest(BaseModel):
    path: str


class IngestResponse(BaseModel):
    results: list[dict]


class IngestSourcesResponse(BaseModel):
    results: list[dict]


class ProjectRefreshResponse(BaseModel):
    project: str
    aliases: list[str]
    description: str
    purge_deleted: bool
    status: str
    roots_ingested: int
    roots_skipped: int
    roots: list[dict]


class ProjectRegistrationProposalRequest(BaseModel):
    project_id: str
    aliases: list[str] = []
    description: str = ""
    ingest_roots: list[dict]


class ProjectUpdateRequest(BaseModel):
    aliases: list[str] | None = None
    description: str | None = None
    ingest_roots: list[dict] | None = None


class QueryRequest(BaseModel):
    prompt: str
    top_k: int = 10
    filter_tags: list[str] | None = None
    project: str | None = None


class QueryResponse(BaseModel):
    results: list[dict]


class ContextBuildRequest(BaseModel):
    prompt: str
    project: str | None = None
    budget: int | None = None


class ContextBuildResponse(BaseModel):
    formatted_context: str
    full_prompt: str
    chunks_used: int
    total_chars: int
    budget: int
    budget_remaining: int
    duration_ms: int
    chunks: list[dict]


class MemoryCreateRequest(BaseModel):
    memory_type: str
    content: str
    project: str = ""
    confidence: float = 1.0
    status: str = "active"


class MemoryUpdateRequest(BaseModel):
    content: str | None = None
    confidence: float | None = None
    status: str | None = None


class ProjectStateSetRequest(BaseModel):
    project: str
    category: str
    key: str
    value: str
    source: str = ""
    confidence: float = 1.0


class ProjectStateGetRequest(BaseModel):
    project: str
    category: str | None = None


class ProjectStateInvalidateRequest(BaseModel):
    project: str
    category: str
    key: str


# --- Endpoints ---


@router.post("/ingest", response_model=IngestResponse)
def api_ingest(req: IngestRequest) -> IngestResponse:
    """Ingest a markdown file or folder."""
    target = Path(req.path)
    try:
        with exclusive_ingestion():
            if target.is_file():
                results = [ingest_file(target)]
            elif target.is_dir():
                results = ingest_folder(target)
            else:
                raise HTTPException(status_code=404, detail=f"Path not found: {req.path}")
    except HTTPException:
        raise
    except Exception as e:
        log.error("ingest_failed", path=req.path, error=str(e))
        raise HTTPException(status_code=500, detail=f"Ingestion failed: {e}")
    return IngestResponse(results=results)


@router.post("/ingest/sources", response_model=IngestSourcesResponse)
def api_ingest_sources() -> IngestSourcesResponse:
    """Ingest enabled configured source directories."""
    try:
        with exclusive_ingestion():
            results = ingest_configured_sources()
    except Exception as e:
        log.error("ingest_sources_failed", error=str(e))
        raise HTTPException(status_code=500, detail=f"Configured source ingestion failed: {e}")
    return IngestSourcesResponse(results=results)


@router.get("/projects")
def api_projects() -> dict:
    """Return registered projects and their resolved ingest roots."""
    return {
        "projects": list_registered_projects(),
        "registry_path": str(_config.settings.resolved_project_registry_path),
    }


@router.get("/projects/template")
def api_projects_template() -> dict:
    """Return a starter template for project registry entries."""
    return {
        "template": get_project_registry_template(),
        "registry_path": str(_config.settings.resolved_project_registry_path),
        "allowed_sources": ["vault", "drive"],
    }


@router.post("/projects/proposal")
def api_project_registration_proposal(req: ProjectRegistrationProposalRequest) -> dict:
    """Return a normalized project registration proposal without writing it."""
    try:
        return build_project_registration_proposal(
            project_id=req.project_id,
            aliases=req.aliases,
            description=req.description,
            ingest_roots=req.ingest_roots,
        )
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))


@router.post("/projects/register")
def api_project_registration(req: ProjectRegistrationProposalRequest) -> dict:
    """Persist a validated project registration to the registry file."""
    try:
        return register_project(
            project_id=req.project_id,
            aliases=req.aliases,
            description=req.description,
            ingest_roots=req.ingest_roots,
        )
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))


@router.put("/projects/{project_name}")
def api_project_update(project_name: str, req: ProjectUpdateRequest) -> dict:
    """Update an existing project registration."""
    try:
        return update_project(
            project_name=project_name,
            aliases=req.aliases,
            description=req.description,
            ingest_roots=req.ingest_roots,
        )
    except ValueError as e:
        detail = str(e)
        if detail.startswith("Unknown project"):
            raise HTTPException(status_code=404, detail=detail)
        raise HTTPException(status_code=400, detail=detail)


@router.post("/projects/{project_name}/refresh", response_model=ProjectRefreshResponse)
def api_refresh_project(project_name: str, purge_deleted: bool = False) -> ProjectRefreshResponse:
    """Refresh one registered project from its configured ingest roots."""
    try:
        with exclusive_ingestion():
            result = refresh_registered_project(project_name, purge_deleted=purge_deleted)
    except ValueError as e:
        raise HTTPException(status_code=404, detail=str(e))
    except Exception as e:
        log.error("project_refresh_failed", project=project_name, error=str(e))
        raise HTTPException(status_code=500, detail=f"Project refresh failed: {e}")
    return ProjectRefreshResponse(**result)


@router.post("/query", response_model=QueryResponse)
def api_query(req: QueryRequest) -> QueryResponse:
    """Retrieve relevant chunks for a prompt."""
    try:
        chunks = retrieve(
            req.prompt,
            top_k=req.top_k,
            filter_tags=req.filter_tags,
            project_hint=req.project,
        )
    except Exception as e:
        log.error("query_failed", prompt=req.prompt[:100], error=str(e))
        raise HTTPException(status_code=500, detail=f"Query failed: {e}")
    return QueryResponse(
        results=[
            {
                "chunk_id": c.chunk_id,
                "content": c.content,
                "score": c.score,
                "heading_path": c.heading_path,
                "source_file": c.source_file,
                "title": c.title,
            }
            for c in chunks
        ]
    )


@router.post("/context/build", response_model=ContextBuildResponse)
def api_build_context(req: ContextBuildRequest) -> ContextBuildResponse:
    """Build a full context pack for a prompt."""
    try:
        pack = build_context(
            user_prompt=req.prompt,
            project_hint=req.project,
            budget=req.budget,
        )
    except Exception as e:
        log.error("context_build_failed", prompt=req.prompt[:100], error=str(e))
        raise HTTPException(status_code=500, detail=f"Context build failed: {e}")
    pack_dict = _pack_to_dict(pack)
    return ContextBuildResponse(
        formatted_context=pack.formatted_context,
        full_prompt=pack.full_prompt,
        chunks_used=len(pack.chunks_used),
        total_chars=pack.total_chars,
        budget=pack.budget,
        budget_remaining=pack.budget_remaining,
        duration_ms=pack.duration_ms,
        chunks=pack_dict["chunks"],
    )


@router.post("/memory")
def api_create_memory(req: MemoryCreateRequest) -> dict:
    """Create a new memory entry."""
    try:
        mem = create_memory(
            memory_type=req.memory_type,
            content=req.content,
            project=req.project,
            confidence=req.confidence,
            status=req.status,
        )
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))
    return {"status": "ok", "id": mem.id, "memory_type": mem.memory_type}


@router.get("/memory")
def api_get_memories(
    memory_type: str | None = None,
    project: str | None = None,
    active_only: bool = True,
    min_confidence: float = 0.0,
    limit: int = 50,
    status: str | None = None,
) -> dict:
    """List memories, optionally filtered.

    When ``status`` is given explicitly it overrides ``active_only`` so
    the Phase 9 Commit C review queue can be listed via
    ``GET /memory?status=candidate``.
    """
    try:
        memories = get_memories(
            memory_type=memory_type,
            project=project,
            active_only=active_only,
            min_confidence=min_confidence,
            limit=limit,
            status=status,
        )
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))
    return {
        "memories": [
            {
                "id": m.id,
                "memory_type": m.memory_type,
                "content": m.content,
                "project": m.project,
                "confidence": m.confidence,
                "status": m.status,
                "reference_count": m.reference_count,
                "last_referenced_at": m.last_referenced_at,
                "updated_at": m.updated_at,
            }
            for m in memories
        ],
        "types": MEMORY_TYPES,
        "statuses": MEMORY_STATUSES,
    }


@router.put("/memory/{memory_id}")
def api_update_memory(memory_id: str, req: MemoryUpdateRequest) -> dict:
    """Update an existing memory."""
    try:
        success = update_memory(
            memory_id=memory_id,
            content=req.content,
            confidence=req.confidence,
            status=req.status,
        )
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))
    if not success:
        raise HTTPException(status_code=404, detail="Memory not found")
    return {"status": "updated", "id": memory_id}


@router.delete("/memory/{memory_id}")
def api_invalidate_memory(memory_id: str) -> dict:
    """Invalidate a memory (error correction)."""
    success = invalidate_memory(memory_id)
    if not success:
        raise HTTPException(status_code=404, detail="Memory not found")
    return {"status": "invalidated", "id": memory_id}


@router.post("/memory/{memory_id}/promote")
def api_promote_memory(memory_id: str) -> dict:
    """Promote a candidate memory to active (Phase 9 Commit C)."""
    try:
        success = promote_memory(memory_id)
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))
    if not success:
        raise HTTPException(
            status_code=404,
            detail=f"Memory not found or not a candidate: {memory_id}",
        )
    return {"status": "promoted", "id": memory_id}


@router.post("/memory/{memory_id}/reject")
def api_reject_candidate_memory(memory_id: str) -> dict:
    """Reject a candidate memory (Phase 9 Commit C review queue)."""
    success = reject_candidate_memory(memory_id)
    if not success:
        raise HTTPException(
            status_code=404,
            detail=f"Memory not found or not a candidate: {memory_id}",
        )
    return {"status": "rejected", "id": memory_id}


@router.post("/project/state")
def api_set_project_state(req: ProjectStateSetRequest) -> dict:
    """Set or update a trusted project state entry."""
    try:
        entry = set_state(
            project_name=req.project,
            category=req.category,
            key=req.key,
            value=req.value,
            source=req.source,
            confidence=req.confidence,
        )
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))
    except Exception as e:
        log.error("set_state_failed", error=str(e))
        raise HTTPException(status_code=500, detail=f"Failed to set state: {e}")
    return {"status": "ok", "id": entry.id, "category": entry.category, "key": entry.key}


@router.get("/project/state/{project_name}")
def api_get_project_state(project_name: str, category: str | None = None) -> dict:
    """Get trusted project state entries."""
    entries = get_state(project_name, category=category)
    return {
        "project": project_name,
        "entries": [
            {
                "id": e.id,
                "category": e.category,
                "key": e.key,
                "value": e.value,
                "source": e.source,
                "confidence": e.confidence,
                "status": e.status,
                "updated_at": e.updated_at,
            }
            for e in entries
        ],
        "categories": CATEGORIES,
    }


@router.delete("/project/state")
def api_invalidate_project_state(req: ProjectStateInvalidateRequest) -> dict:
    """Invalidate (supersede) a project state entry."""
    success = invalidate_state(req.project, req.category, req.key)
    if not success:
        raise HTTPException(status_code=404, detail="State entry not found or already invalidated")
    return {"status": "invalidated", "project": req.project, "category": req.category, "key": req.key}


class InteractionRecordRequest(BaseModel):
    prompt: str
    response: str = ""
    response_summary: str = ""
    project: str = ""
    client: str = ""
    session_id: str = ""
    memories_used: list[str] = []
    chunks_used: list[str] = []
    context_pack: dict | None = None
    reinforce: bool = True
    extract: bool = False


@router.post("/interactions")
def api_record_interaction(req: InteractionRecordRequest) -> dict:
    """Capture one interaction (prompt + response + what was used).

    This is the foundation of the AtoCore reflection loop. It records
    what the system fed to an LLM and what came back. If ``reinforce``
    is true (default) and there is response content, the Phase 9
    Commit B reinforcement pass runs automatically, bumping the
    confidence of any active memory echoed in the response. Nothing is
    ever promoted into trusted state automatically.
    """
    try:
        interaction = record_interaction(
            prompt=req.prompt,
            response=req.response,
            response_summary=req.response_summary,
            project=req.project,
            client=req.client,
            session_id=req.session_id,
            memories_used=req.memories_used,
            chunks_used=req.chunks_used,
            context_pack=req.context_pack,
            reinforce=req.reinforce,
            extract=req.extract,
        )
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))
    return {
        "status": "recorded",
        "id": interaction.id,
        "created_at": interaction.created_at,
    }


@router.post("/interactions/{interaction_id}/reinforce")
def api_reinforce_interaction(interaction_id: str) -> dict:
    """Run the reinforcement pass on an already-captured interaction.

    Useful for backfilling reinforcement over historical interactions,
    or for retrying after a transient failure in the automatic pass
    that runs inside ``POST /interactions``.
    """
    interaction = get_interaction(interaction_id)
    if interaction is None:
        raise HTTPException(status_code=404, detail=f"Interaction not found: {interaction_id}")
    results = reinforce_from_interaction(interaction)
    return {
        "interaction_id": interaction_id,
        "reinforced_count": len(results),
        "reinforced": [
            {
                "memory_id": r.memory_id,
                "memory_type": r.memory_type,
                "old_confidence": round(r.old_confidence, 4),
                "new_confidence": round(r.new_confidence, 4),
            }
            for r in results
        ],
    }


class InteractionExtractRequest(BaseModel):
    persist: bool = False
    mode: str = "rule"  # "rule" or "llm"


@router.post("/interactions/{interaction_id}/extract")
def api_extract_from_interaction(
    interaction_id: str,
    req: InteractionExtractRequest | None = None,
) -> dict:
    """Extract candidate memories from a captured interaction.

    Phase 9 Commit C. The extractor is rule-based and deliberately
    conservative — it only surfaces candidates that matched an explicit
    structural cue (decision heading, preference sentence, etc.). By
    default the candidates are returned *without* being persisted so a
    caller can preview them before committing to a review queue. Pass
    ``persist: true`` to immediately create candidate memories for
    each extraction result.
    """
    interaction = get_interaction(interaction_id)
    if interaction is None:
        raise HTTPException(status_code=404, detail=f"Interaction not found: {interaction_id}")
    payload = req or InteractionExtractRequest()
    if payload.mode == "llm":
        candidates: list[MemoryCandidate] = extract_candidates_llm(interaction)
    else:
        candidates: list[MemoryCandidate] = extract_candidates_from_interaction(interaction)

    persisted_ids: list[str] = []
    if payload.persist:
        for candidate in candidates:
            try:
                mem = create_memory(
                    memory_type=candidate.memory_type,
                    content=candidate.content,
                    project=candidate.project,
                    confidence=candidate.confidence,
                    status="candidate",
                )
                persisted_ids.append(mem.id)
            except ValueError as e:
                log.error(
                    "extract_persist_failed",
                    interaction_id=interaction_id,
                    rule=candidate.rule,
                    error=str(e),
                )

    return {
        "interaction_id": interaction_id,
        "candidate_count": len(candidates),
        "persisted": payload.persist,
        "persisted_ids": persisted_ids,
        "extractor_version": EXTRACTOR_VERSION,
        "candidates": [
            {
                "memory_type": c.memory_type,
                "content": c.content,
                "project": c.project,
                "confidence": c.confidence,
                "rule": c.rule,
                "source_span": c.source_span,
                "extractor_version": c.extractor_version,
            }
            for c in candidates
        ],
    }


@router.get("/interactions")
def api_list_interactions(
    project: str | None = None,
    session_id: str | None = None,
    client: str | None = None,
    since: str | None = None,
    limit: int = 50,
) -> dict:
    """List captured interactions, optionally filtered by project, session,
    client, or creation time. Hard-capped at 500 entries per call."""
    interactions = list_interactions(
        project=project,
        session_id=session_id,
        client=client,
        since=since,
        limit=limit,
    )
    return {
        "count": len(interactions),
        "interactions": [
            {
                "id": i.id,
                "prompt": i.prompt,
                "response_summary": i.response_summary,
                "response_chars": len(i.response),
                "project": i.project,
                "client": i.client,
                "session_id": i.session_id,
                "memories_used": i.memories_used,
                "chunks_used": i.chunks_used,
                "created_at": i.created_at,
            }
            for i in interactions
        ],
    }


@router.get("/interactions/{interaction_id}")
def api_get_interaction(interaction_id: str) -> dict:
    """Fetch a single interaction with the full response and context pack."""
    interaction = get_interaction(interaction_id)
    if interaction is None:
        raise HTTPException(status_code=404, detail=f"Interaction not found: {interaction_id}")
    return {
        "id": interaction.id,
        "prompt": interaction.prompt,
        "response": interaction.response,
        "response_summary": interaction.response_summary,
        "project": interaction.project,
        "client": interaction.client,
        "session_id": interaction.session_id,
        "memories_used": interaction.memories_used,
        "chunks_used": interaction.chunks_used,
        "context_pack": interaction.context_pack,
        "created_at": interaction.created_at,
    }


class BackupCreateRequest(BaseModel):
    include_chroma: bool = False


@router.post("/admin/backup")
def api_create_backup(req: BackupCreateRequest | None = None) -> dict:
    """Create a runtime backup snapshot.

    When ``include_chroma`` is true the call holds the ingestion lock so a
    safe cold copy of the vector store can be taken without racing against
    refresh or ingest endpoints.
    """
    payload = req or BackupCreateRequest()
    try:
        if payload.include_chroma:
            with exclusive_ingestion():
                metadata = create_runtime_backup(include_chroma=True)
        else:
            metadata = create_runtime_backup(include_chroma=False)
    except Exception as e:
        log.error("admin_backup_failed", error=str(e))
        raise HTTPException(status_code=500, detail=f"Backup failed: {e}")
    return metadata


@router.get("/admin/backup")
def api_list_backups() -> dict:
    """List all runtime backups under the configured backup directory."""
    return {
        "backup_dir": str(_config.settings.resolved_backup_dir),
        "backups": list_runtime_backups(),
    }


class BackupCleanupRequest(BaseModel):
    confirm: bool = False


@router.post("/admin/backup/cleanup")
def api_cleanup_backups(req: BackupCleanupRequest | None = None) -> dict:
    """Apply retention policy to old backup snapshots.

    Dry-run by default. Pass ``confirm: true`` to actually delete.
    Retention: last 7 daily, last 4 weekly (Sundays), last 6 monthly (1st).
    """
    payload = req or BackupCleanupRequest()
    try:
        return cleanup_old_backups(confirm=payload.confirm)
    except Exception as e:
        log.error("admin_cleanup_failed", error=str(e))
        raise HTTPException(status_code=500, detail=f"Cleanup failed: {e}")


class ExtractBatchRequest(BaseModel):
    since: str | None = None
    mode: str = "llm"
    limit: int = 50
    persist: bool = True


@router.post("/admin/extract-batch")
def api_extract_batch(req: ExtractBatchRequest | None = None) -> dict:
    """Run batch extraction across recent interactions.

    Fetches interactions since ``since`` (or since the last recorded
    batch run), runs the extractor (rule or LLM) on each, and persists
    any candidates as ``status=candidate``. The last-run timestamp is
    stored in project state under ``atocore / status /
    last_extract_batch_run`` so subsequent calls without ``since``
    automatically pick up where the last run left off.

    This endpoint is the operational home for R1 / R5 — it makes the
    LLM extractor accessible as an API operation rather than a
    script-only eval tool. Still NOT on the capture hot path: callers
    invoke this endpoint explicitly (cron, manual curl, CLI).
    """
    payload = req or ExtractBatchRequest()

    if payload.mode == "llm" and not _llm_cli_available():
        raise HTTPException(
            status_code=503,
            detail=(
                "LLM extraction unavailable in this runtime: the `claude` CLI "
                "is not on PATH. Run host-side via "
                "`scripts/batch_llm_extract_live.py` instead, or call this "
                "endpoint with mode=\"rule\"."
            ),
        )

    since = payload.since

    if not since:
        state_entries = get_state("atocore")
        for entry in state_entries:
            if entry.category == "status" and entry.key == "last_extract_batch_run":
                since = entry.value
                break

    interactions = list_interactions(since=since, limit=min(payload.limit, 200))

    processed = 0
    total_candidates = 0
    total_persisted = 0
    errors: list[dict] = []

    for interaction in interactions:
        if not (interaction.response or interaction.response_summary):
            continue
        try:
            if payload.mode == "llm":
                candidates = extract_candidates_llm(interaction)
            else:
                candidates = extract_candidates_from_interaction(interaction)
        except Exception as exc:
            errors.append({"interaction_id": interaction.id, "error": str(exc)})
            continue

        processed += 1
        total_candidates += len(candidates)

        if payload.persist and candidates:
            for candidate in candidates:
                try:
                    create_memory(
                        memory_type=candidate.memory_type,
                        content=candidate.content,
                        project=candidate.project,
                        confidence=candidate.confidence,
                        status="candidate",
                    )
                    total_persisted += 1
                except ValueError:
                    pass  # duplicate — skip silently

    from datetime import datetime, timezone

    now = datetime.now(timezone.utc).strftime("%Y-%m-%d %H:%M:%S")
    try:
        set_state(
            project="atocore",
            category="status",
            key="last_extract_batch_run",
            value=now,
            source="admin/extract-batch endpoint",
        )
    except Exception:
        pass  # best-effort timestamp tracking

    log.info(
        "extract_batch_complete",
        mode=payload.mode,
        processed=processed,
        total_candidates=total_candidates,
        total_persisted=total_persisted,
        errors=len(errors),
    )

    return {
        "processed": processed,
        "total_candidates": total_candidates,
        "total_persisted": total_persisted,
        "mode": payload.mode,
        "persist": payload.persist,
        "since": since or "(first run)",
        "errors": errors,
    }


@router.get("/admin/dashboard")
def api_dashboard() -> dict:
    """One-shot system observability dashboard.

    Returns memory counts by type/project/status, project state
    entry counts, interaction volume by client, pipeline health
    (harness, triage stats, last run), and extraction pipeline
    status — everything an operator needs to understand AtoCore's
    health beyond the basic /health endpoint.
    """
    import json as _json
    from collections import Counter
    from datetime import datetime as _dt, timezone as _tz

    all_memories = get_memories(active_only=False, limit=500)
    active = [m for m in all_memories if m.status == "active"]
    candidates = [m for m in all_memories if m.status == "candidate"]

    type_counts = dict(Counter(m.memory_type for m in active))
    project_counts = dict(Counter(m.project or "(none)" for m in active))
    reinforced = [m for m in active if m.reference_count > 0]

    # Interaction stats — total + by_client from DB directly
    interaction_stats: dict = {"most_recent": None, "total": 0, "by_client": {}}
    try:
        from atocore.models.database import get_connection as _gc

        with _gc() as conn:
            row = conn.execute("SELECT count(*) FROM interactions").fetchone()
            interaction_stats["total"] = row[0] if row else 0
            rows = conn.execute(
                "SELECT client, count(*) FROM interactions GROUP BY client"
            ).fetchall()
            interaction_stats["by_client"] = {r[0]: r[1] for r in rows}
            row = conn.execute(
                "SELECT created_at FROM interactions ORDER BY created_at DESC LIMIT 1"
            ).fetchone()
            interaction_stats["most_recent"] = row[0] if row else None
    except Exception:
        interactions = list_interactions(limit=1)
        interaction_stats["most_recent"] = (
            interactions[0].created_at if interactions else None
        )

    # Pipeline health from project state
    pipeline: dict = {}
    extract_state: dict = {}
    try:
        state_entries = get_state("atocore")
        for entry in state_entries:
            if entry.category != "status":
                continue
            if entry.key == "last_extract_batch_run":
                extract_state["last_run"] = entry.value
            elif entry.key == "pipeline_last_run":
                pipeline["last_run"] = entry.value
                try:
                    last = _dt.fromisoformat(entry.value.replace("Z", "+00:00"))
                    delta = _dt.now(_tz.utc) - last
                    pipeline["hours_since_last_run"] = round(
                        delta.total_seconds() / 3600, 1
                    )
                except Exception:
                    pass
            elif entry.key == "pipeline_summary":
                try:
                    pipeline["summary"] = _json.loads(entry.value)
                except Exception:
                    pipeline["summary_raw"] = entry.value
            elif entry.key == "retrieval_harness_result":
                try:
                    pipeline["harness"] = _json.loads(entry.value)
                except Exception:
                    pipeline["harness_raw"] = entry.value
    except Exception:
        pass

    # Project state counts — include all registered projects
    ps_counts = {}
    try:
        from atocore.projects.registry import load_project_registry as _lpr

        for proj in _lpr():
            try:
                entries = get_state(proj.project_id)
                ps_counts[proj.project_id] = len(entries)
            except Exception:
                pass
    except Exception:
        for proj_id in [
            "p04-gigabit", "p05-interferometer", "p06-polisher", "atocore",
        ]:
            try:
                entries = get_state(proj_id)
                ps_counts[proj_id] = len(entries)
            except Exception:
                pass

    return {
        "memories": {
            "active": len(active),
            "candidates": len(candidates),
            "by_type": type_counts,
            "by_project": project_counts,
            "reinforced": len(reinforced),
        },
        "project_state": {
            "counts": ps_counts,
            "total": sum(ps_counts.values()),
        },
        "interactions": interaction_stats,
        "extraction_pipeline": extract_state,
        "pipeline": pipeline,
    }


# --- Engineering Knowledge Layer (Layer 2) ---


class EntityCreateRequest(BaseModel):
    entity_type: str
    name: str
    project: str = ""
    description: str = ""
    properties: dict | None = None
    status: str = "active"
    confidence: float = 1.0
    source_refs: list[str] | None = None


class RelationshipCreateRequest(BaseModel):
    source_entity_id: str
    target_entity_id: str
    relationship_type: str
    confidence: float = 1.0
    source_refs: list[str] | None = None


@router.post("/entities")
def api_create_entity(req: EntityCreateRequest) -> dict:
    """Create a new engineering entity."""
    try:
        entity = create_entity(
            entity_type=req.entity_type,
            name=req.name,
            project=req.project,
            description=req.description,
            properties=req.properties,
            status=req.status,
            confidence=req.confidence,
            source_refs=req.source_refs,
        )
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))
    return {"status": "ok", "id": entity.id, "entity_type": entity.entity_type, "name": entity.name}


@router.get("/entities")
def api_list_entities(
    entity_type: str | None = None,
    project: str | None = None,
    status: str = "active",
    name_contains: str | None = None,
    limit: int = 100,
) -> dict:
    """List engineering entities with optional filters."""
    entities = get_entities(
        entity_type=entity_type,
        project=project,
        status=status,
        name_contains=name_contains,
        limit=limit,
    )
    return {
        "entities": [
            {
                "id": e.id,
                "entity_type": e.entity_type,
                "name": e.name,
                "project": e.project,
                "description": e.description,
                "properties": e.properties,
                "status": e.status,
                "confidence": e.confidence,
            }
            for e in entities
        ],
        "count": len(entities),
    }


@router.get("/entities/{entity_id}")
def api_get_entity(entity_id: str) -> dict:
    """Get an entity with its relationships and related entities."""
    result = get_entity_with_context(entity_id)
    if result is None:
        raise HTTPException(status_code=404, detail=f"Entity not found: {entity_id}")
    entity = result["entity"]
    return {
        "entity": {
            "id": entity.id,
            "entity_type": entity.entity_type,
            "name": entity.name,
            "project": entity.project,
            "description": entity.description,
            "properties": entity.properties,
            "status": entity.status,
            "confidence": entity.confidence,
            "source_refs": entity.source_refs,
            "created_at": entity.created_at,
            "updated_at": entity.updated_at,
        },
        "relationships": [
            {
                "id": r.id,
                "source_entity_id": r.source_entity_id,
                "target_entity_id": r.target_entity_id,
                "relationship_type": r.relationship_type,
                "confidence": r.confidence,
            }
            for r in result["relationships"]
        ],
        "related_entities": {
            eid: {
                "entity_type": e.entity_type,
                "name": e.name,
                "project": e.project,
                "description": e.description[:200],
            }
            for eid, e in result["related_entities"].items()
        },
    }


@router.post("/relationships")
def api_create_relationship(req: RelationshipCreateRequest) -> dict:
    """Create a relationship between two entities."""
    try:
        rel = create_relationship(
            source_entity_id=req.source_entity_id,
            target_entity_id=req.target_entity_id,
            relationship_type=req.relationship_type,
            confidence=req.confidence,
            source_refs=req.source_refs,
        )
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))
    return {
        "status": "ok",
        "id": rel.id,
        "relationship_type": rel.relationship_type,
    }


@router.get("/projects/{project_name}/mirror.html", response_class=HTMLResponse)
def api_project_mirror_html(project_name: str) -> HTMLResponse:
    """Serve a readable HTML project overview page.

    Open in a browser for a clean, styled project dashboard derived
    from AtoCore's structured data. Source of truth is the database —
    this page is a derived view.
    """
    from atocore.projects.registry import resolve_project_name as _resolve

    canonical = _resolve(project_name)
    try:
        md_content = generate_project_overview(canonical)
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Mirror generation failed: {e}")

    import markdown

    html_body = markdown.markdown(md_content, extensions=["tables", "fenced_code"])
    html = _MIRROR_HTML_TEMPLATE.replace("{{title}}", f"{canonical} — AtoCore Mirror")
    html = html.replace("{{body}}", html_body)
    return HTMLResponse(content=html)


_MIRROR_HTML_TEMPLATE = """<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>{{title}}</title>
<style>
  :root { --bg: #fafafa; --text: #1a1a2e; --accent: #2563eb; --border: #e2e8f0; --card: #fff; }
  @media (prefers-color-scheme: dark) {
    :root { --bg: #0f172a; --text: #e2e8f0; --accent: #60a5fa; --border: #334155; --card: #1e293b; }
  }
  * { box-sizing: border-box; margin: 0; padding: 0; }
  body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.7; color: var(--text); background: var(--bg);
    max-width: 800px; margin: 0 auto; padding: 2rem 1.5rem;
  }
  h1 { font-size: 1.8rem; margin-bottom: 0.5rem; color: var(--accent); }
  h2 { font-size: 1.4rem; margin-top: 2.5rem; margin-bottom: 0.8rem; padding-bottom: 0.3rem; border-bottom: 2px solid var(--border); }
  h3 { font-size: 1.15rem; margin-top: 1.5rem; margin-bottom: 0.5rem; }
  p { margin-bottom: 0.8rem; }
  ul { margin-left: 1.5rem; margin-bottom: 1rem; }
  li { margin-bottom: 0.4rem; }
  li ul { margin-top: 0.3rem; }
  strong { color: var(--accent); font-weight: 600; }
  em { opacity: 0.7; font-size: 0.9em; }
  blockquote {
    background: var(--card); border-left: 4px solid var(--accent);
    padding: 0.8rem 1.2rem; margin: 1rem 0; border-radius: 0 8px 8px 0;
  }
  hr { border: none; border-top: 1px solid var(--border); margin: 2rem 0; }
  code { background: var(--card); padding: 0.15rem 0.4rem; border-radius: 4px; font-size: 0.9em; }
  a { color: var(--accent); text-decoration: none; }
  a:hover { text-decoration: underline; }
</style>
</head>
<body>
{{body}}
</body>
</html>"""


@router.get("/projects/{project_name}/mirror")
def api_project_mirror(project_name: str) -> dict:
    """Generate a human-readable project overview from structured data.

    Layer 3 of the AtoCore architecture. The mirror is DERIVED from
    entities, project state, and memories — it is not canonical truth.
    Returns markdown that can be rendered, saved to a file, or served
    as a dashboard page.
    """
    from atocore.projects.registry import resolve_project_name as _resolve

    canonical = _resolve(project_name)
    try:
        markdown = generate_project_overview(canonical)
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Mirror generation failed: {e}")
    return {"project": canonical, "format": "markdown", "content": markdown}


@router.get("/admin/backup/{stamp}/validate")
def api_validate_backup(stamp: str) -> dict:
    """Validate that a previously created backup is structurally usable."""
    result = validate_backup(stamp)
    if not result.get("exists", False):
        raise HTTPException(status_code=404, detail=f"Backup not found: {stamp}")
    return result


@router.get("/health")
def api_health() -> dict:
    """Health check.

    Three layers of version reporting, in increasing precision:

    - ``version`` / ``code_version``: ``atocore.__version__`` (e.g.
      "0.2.0"). Bumped manually on commits that change the API
      surface, schema, or user-visible behavior. Coarse — any
      number of commits can land between bumps without changing
      this value.
    - ``build_sha``: full git SHA of the commit the running
      container was built from. Set by ``deploy/dalidou/deploy.sh``
      via the ``ATOCORE_BUILD_SHA`` env var on every rebuild.
      Reports ``"unknown"`` for builds that bypass deploy.sh
      (direct ``docker compose up`` etc.). This is the precise
      drift signal: if the live ``build_sha`` doesn't match the
      tip of the deployed branch on Gitea, the service is stale
      regardless of what ``code_version`` says.
    - ``build_time`` / ``build_branch``: when and from which branch
      the live container was built. Useful for forensics when
      multiple branches are in flight or when build_sha is
      ambiguous (e.g. a force-push to the same SHA).

    The deploy.sh post-deploy verification step compares the live
    ``build_sha`` to the SHA it just set, and exits non-zero on
    mismatch.
    """
    import os

    from atocore import __version__

    store = get_vector_store()
    source_status = get_source_status()
    return {
        "status": "ok",
        "version": __version__,
        "code_version": __version__,
        "build_sha": os.environ.get("ATOCORE_BUILD_SHA", "unknown"),
        "build_time": os.environ.get("ATOCORE_BUILD_TIME", "unknown"),
        "build_branch": os.environ.get("ATOCORE_BUILD_BRANCH", "unknown"),
        "vectors_count": store.count,
        "env": _config.settings.env,
        "machine_paths": {
            "db_path": str(_config.settings.db_path),
            "chroma_path": str(_config.settings.chroma_path),
            "log_dir": str(_config.settings.resolved_log_dir),
            "backup_dir": str(_config.settings.resolved_backup_dir),
            "run_dir": str(_config.settings.resolved_run_dir),
        },
        "sources_ready": all(
            (not source["enabled"]) or (source["exists"] and source["is_dir"])
            for source in source_status
        ),
        "source_status": source_status,
    }


@router.get("/sources")
def api_sources() -> dict:
    """Return configured ingestion source directories and readiness."""
    return {
        "sources": get_source_status(),
        "vault_enabled": _config.settings.source_vault_enabled,
        "drive_enabled": _config.settings.source_drive_enabled,
    }


@router.get("/stats")
def api_stats() -> dict:
    """Ingestion statistics."""
    return get_ingestion_stats()


@router.get("/debug/context")
def api_debug_context() -> dict:
    """Inspect the last assembled context pack."""
    pack = get_last_context_pack()
    if pack is None:
        return {"message": "No context pack built yet."}
    return _pack_to_dict(pack)