#!/usr/bin/env python3
from __future__ import annotations

import json
import os
import re
import sys
import urllib.error
import urllib.parse
import urllib.request
from typing import Any


BASE_URL = os.environ.get("ATOCORE_BASE_URL", "http://dalidou:8100").rstrip("/")
TIMEOUT = int(os.environ.get("ATOCORE_TIMEOUT_SECONDS", "30"))
REFRESH_TIMEOUT = int(os.environ.get("ATOCORE_REFRESH_TIMEOUT_SECONDS", "1800"))
FAIL_OPEN = os.environ.get("ATOCORE_FAIL_OPEN", "true").lower() == "true"


USAGE = """Usage:
  atocore.py health
  atocore.py sources
  atocore.py stats
  atocore.py projects
  atocore.py project-template
  atocore.py detect-project <prompt>
  atocore.py auto-context <prompt> [budget] [project]
  atocore.py debug-context
  atocore.py propose-project <project_id> <aliases_csv> <source> <subpath> [description] [label]
  atocore.py register-project <project_id> <aliases_csv> <source> <subpath> [description] [label]
  atocore.py update-project <project> <description> [aliases_csv]
  atocore.py refresh-project <project> [purge_deleted]
  atocore.py project-state <project> [category]
  atocore.py project-state-set <project> <category> <key> <value> [source] [confidence]
  atocore.py project-state-invalidate <project> <category> <key>
  atocore.py query <prompt> [top_k] [project]
  atocore.py context-build <prompt> [project] [budget]
  atocore.py audit-query <prompt> [top_k] [project]
  atocore.py ingest-sources
"""


def print_json(payload: Any) -> None:
    print(json.dumps(payload, ensure_ascii=True))


def fail_open_payload() -> dict[str, Any]:
    return {"status": "unavailable", "source": "atocore", "fail_open": True}


def request(
    method: str,
    path: str,
    data: dict[str, Any] | None = None,
    timeout: int | None = None,
) -> Any:
    url = f"{BASE_URL}{path}"
    headers = {"Content-Type": "application/json"} if data is not None else {}
    payload = json.dumps(data).encode("utf-8") if data is not None else None
    req = urllib.request.Request(url, data=payload, headers=headers, method=method)
    try:
        with urllib.request.urlopen(req, timeout=timeout or TIMEOUT) as response:
            body = response.read().decode("utf-8")
    except urllib.error.HTTPError as exc:
        body = exc.read().decode("utf-8")
        if body:
            print(body)
        raise SystemExit(22) from exc
    except (urllib.error.URLError, TimeoutError, OSError):
        if FAIL_OPEN:
            print_json(fail_open_payload())
            raise SystemExit(0)
        raise

    if not body.strip():
        return {}
    return json.loads(body)


def parse_aliases(aliases_csv: str) -> list[str]:
    return [alias.strip() for alias in aliases_csv.split(",") if alias.strip()]


def project_payload(
    project_id: str,
    aliases_csv: str,
    source: str,
    subpath: str,
    description: str,
    label: str,
) -> dict[str, Any]:
    return {
        "project_id": project_id,
        "aliases": parse_aliases(aliases_csv),
        "description": description,
        "ingest_roots": [{"source": source, "subpath": subpath, "label": label}],
    }


def detect_project(prompt: str) -> dict[str, Any]:
    payload = request("GET", "/projects")
    prompt_lower = prompt.lower()
    best_project = None
    best_alias = None
    best_score = -1

    for project in payload.get("projects", []):
        candidates = [project.get("id", ""), *project.get("aliases", [])]
        for candidate in candidates:
            candidate = (candidate or "").strip()
            if not candidate:
                continue
            pattern = rf"(?<![a-z0-9]){re.escape(candidate.lower())}(?![a-z0-9])"
            matched = re.search(pattern, prompt_lower) is not None
            if not matched and candidate.lower() not in prompt_lower:
                continue
            score = len(candidate)
            if score > best_score:
                best_project = project.get("id")
                best_alias = candidate
                best_score = score

    return {"matched_project": best_project, "matched_alias": best_alias}


def bool_arg(raw: str) -> bool:
    return raw.lower() in {"1", "true", "yes", "y"}


def classify_result(result: dict[str, Any]) -> dict[str, Any]:
    source_file = (result.get("source_file") or "").lower()
    heading = (result.get("heading_path") or "").lower()
    title = (result.get("title") or "").lower()
    text = " ".join([source_file, heading, title])

    labels: list[str] = []
    if any(token in text for token in ["_archive", "/archive", "archive/", "pre-cleanup", "pre-migration", "history"]):
        labels.append("archive_or_history")
    if any(token in text for token in ["status", "dashboard", "current-state", "current state", "next-steps", "next steps"]):
        labels.append("current_status")
    if any(token in text for token in ["decision", "adr", "tradeoff", "selected architecture", "selection"]):
        labels.append("decision")
    if any(token in text for token in ["requirement", "spec", "constraints", "baseline", "cdr", "sow"]):
        labels.append("requirements")
    if any(token in text for token in ["roadmap", "milestone", "plan", "workflow", "calibration", "contract"]):
        labels.append("execution_plan")
    if not labels:
        labels.append("reference")

    noisy = "archive_or_history" in labels
    return {
        "score": result.get("score"),
        "title": result.get("title"),
        "heading_path": result.get("heading_path"),
        "source_file": result.get("source_file"),
        "labels": labels,
        "is_noise_risk": noisy,
    }


def audit_query(prompt: str, top_k: int, project: str | None) -> dict[str, Any]:
    response = request(
        "POST",
        "/query",
        {"prompt": prompt, "top_k": top_k, "project": project or None},
    )
    classifications = [classify_result(result) for result in response.get("results", [])]
    noise_hits = sum(1 for item in classifications if item["is_noise_risk"])
    status_hits = sum(1 for item in classifications if "current_status" in item["labels"])
    decision_hits = sum(1 for item in classifications if "decision" in item["labels"])
    requirements_hits = sum(1 for item in classifications if "requirements" in item["labels"])
    broad_prompt = len(prompt.split()) <= 2

    recommendations: list[str] = []
    if broad_prompt:
        recommendations.append("Prompt is broad; prefer a project-specific question with intent, artifact type, or constraint language.")
    if noise_hits:
        recommendations.append("Archive/history noise is present; prefer current-status, decision, requirements, and baseline docs in the next ingestion/ranking pass.")
    if status_hits == 0:
        recommendations.append("No current-status docs surfaced in the top results; Wave 2 should ingest or strengthen trusted operational truth.")
    if decision_hits == 0:
        recommendations.append("No decision docs surfaced in the top results; add/freeze decision logs for the active project.")
    if requirements_hits == 0:
        recommendations.append("No requirements/baseline docs surfaced in the top results; prioritize baseline and architecture freeze material.")
    if not recommendations:
        recommendations.append("Ranking looks healthy for this prompt.")

    return {
        "prompt": prompt,
        "project": project,
        "top_k": top_k,
        "broad_prompt": broad_prompt,
        "noise_hits": noise_hits,
        "current_status_hits": status_hits,
        "decision_hits": decision_hits,
        "requirements_hits": requirements_hits,
        "results": classifications,
        "recommendations": recommendations,
    }


def main(argv: list[str]) -> int:
    if len(argv) < 2:
        print(USAGE, end="")
        return 1

    cmd = argv[1]
    args = argv[2:]

    if cmd == "health":
        print_json(request("GET", "/health"))
        return 0
    if cmd == "sources":
        print_json(request("GET", "/sources"))
        return 0
    if cmd == "stats":
        print_json(request("GET", "/stats"))
        return 0
    if cmd == "projects":
        print_json(request("GET", "/projects"))
        return 0
    if cmd == "project-template":
        print_json(request("GET", "/projects/template"))
        return 0
    if cmd == "detect-project":
        if not args:
            print(USAGE, end="")
            return 1
        print_json(detect_project(args[0]))
        return 0
    if cmd == "auto-context":
        if not args:
            print(USAGE, end="")
            return 1
        prompt = args[0]
        budget = int(args[1]) if len(args) > 1 else 3000
        project = args[2] if len(args) > 2 else ""
        if not project:
            project = detect_project(prompt).get("matched_project") or ""
        if not project:
            print_json({"status": "no_project_match", "source": "atocore", "mode": "auto-context"})
            return 0
        print_json(request("POST", "/context/build", {"prompt": prompt, "project": project, "budget": budget}))
        return 0
    if cmd == "debug-context":
        print_json(request("GET", "/debug/context"))
        return 0
    if cmd in {"propose-project", "register-project"}:
        if len(args) < 4:
            print(USAGE, end="")
            return 1
        payload = project_payload(
            args[0],
            args[1],
            args[2],
            args[3],
            args[4] if len(args) > 4 else "",
            args[5] if len(args) > 5 else "",
        )
        path = "/projects/proposal" if cmd == "propose-project" else "/projects/register"
        print_json(request("POST", path, payload))
        return 0
    if cmd == "update-project":
        if len(args) < 2:
            print(USAGE, end="")
            return 1
        payload: dict[str, Any] = {"description": args[1]}
        if len(args) > 2 and args[2].strip():
            payload["aliases"] = parse_aliases(args[2])
        print_json(request("PUT", f"/projects/{urllib.parse.quote(args[0])}", payload))
        return 0
    if cmd == "refresh-project":
        if not args:
            print(USAGE, end="")
            return 1
        purge_deleted = bool_arg(args[1]) if len(args) > 1 else False
        path = f"/projects/{urllib.parse.quote(args[0])}/refresh?purge_deleted={str(purge_deleted).lower()}"
        print_json(request("POST", path, {}, timeout=REFRESH_TIMEOUT))
        return 0
    if cmd == "project-state":
        if not args:
            print(USAGE, end="")
            return 1
        project = urllib.parse.quote(args[0])
        suffix = f"?category={urllib.parse.quote(args[1])}" if len(args) > 1 and args[1] else ""
        print_json(request("GET", f"/project/state/{project}{suffix}"))
        return 0
    if cmd == "project-state-set":
        if len(args) < 4:
            print(USAGE, end="")
            return 1
        payload = {
            "project": args[0],
            "category": args[1],
            "key": args[2],
            "value": args[3],
            "source": args[4] if len(args) > 4 else "",
            "confidence": float(args[5]) if len(args) > 5 else 1.0,
        }
        print_json(request("POST", "/project/state", payload))
        return 0
    if cmd == "project-state-invalidate":
        if len(args) < 3:
            print(USAGE, end="")
            return 1
        payload = {"project": args[0], "category": args[1], "key": args[2]}
        print_json(request("DELETE", "/project/state", payload))
        return 0
    if cmd == "query":
        if not args:
            print(USAGE, end="")
            return 1
        prompt = args[0]
        top_k = int(args[1]) if len(args) > 1 else 5
        project = args[2] if len(args) > 2 else ""
        print_json(request("POST", "/query", {"prompt": prompt, "top_k": top_k, "project": project or None}))
        return 0
    if cmd == "context-build":
        if not args:
            print(USAGE, end="")
            return 1
        prompt = args[0]
        project = args[1] if len(args) > 1 else ""
        budget = int(args[2]) if len(args) > 2 else 3000
        print_json(request("POST", "/context/build", {"prompt": prompt, "project": project or None, "budget": budget}))
        return 0
    if cmd == "audit-query":
        if not args:
            print(USAGE, end="")
            return 1
        prompt = args[0]
        top_k = int(args[1]) if len(args) > 1 else 5
        project = args[2] if len(args) > 2 else ""
        print_json(audit_query(prompt, top_k, project or None))
        return 0
    if cmd == "ingest-sources":
        print_json(request("POST", "/ingest/sources", {}))
        return 0

    print(USAGE, end="")
    return 1


if __name__ == "__main__":
    raise SystemExit(main(sys.argv))