"""Tests for the context builder."""

from atocore.context.builder import build_context, get_last_context_pack
from atocore.context.project_state import init_project_state_schema, set_state
from atocore.ingestion.pipeline import ingest_file
from atocore.models.database import init_db


def test_build_context_returns_pack(tmp_data_dir, sample_markdown):
    """Test that context builder returns a valid pack."""
    init_db()
    init_project_state_schema()
    ingest_file(sample_markdown)

    pack = build_context("What is AtoCore?")
    assert pack.total_chars > 0
    assert len(pack.chunks_used) > 0
    assert pack.budget_remaining >= 0
    assert "--- End Context ---" in pack.formatted_context


def test_context_respects_budget(tmp_data_dir, sample_markdown):
    """Test that context builder respects character budget."""
    init_db()
    init_project_state_schema()
    ingest_file(sample_markdown)

    pack = build_context("What is AtoCore?", budget=500)
    assert pack.total_chars <= 500
    assert len(pack.formatted_context) <= 500


def test_context_with_project_hint(tmp_data_dir, sample_markdown):
    """Test that project hint boosts relevant chunks."""
    init_db()
    init_project_state_schema()
    ingest_file(sample_markdown)

    pack = build_context("What is the architecture?", project_hint="atocore")
    assert len(pack.chunks_used) > 0
    assert pack.total_chars > 0


def test_last_context_pack_stored(tmp_data_dir, sample_markdown):
    """Test that last context pack is stored for debug."""
    init_db()
    init_project_state_schema()
    ingest_file(sample_markdown)

    build_context("test prompt")
    last = get_last_context_pack()
    assert last is not None
    assert last.query == "test prompt"


def test_full_prompt_structure(tmp_data_dir, sample_markdown):
    """Test that the full prompt has correct structure."""
    init_db()
    init_project_state_schema()
    ingest_file(sample_markdown)

    pack = build_context("What are memory types?")
    assert "knowledge base" in pack.full_prompt.lower()
    assert "What are memory types?" in pack.full_prompt


def test_project_state_included_in_context(tmp_data_dir, sample_markdown):
    """Test that trusted project state is injected into context."""
    init_db()
    init_project_state_schema()
    ingest_file(sample_markdown)

    # Set some project state
    set_state("atocore", "status", "phase", "Phase 0.5 complete")
    set_state("atocore", "decision", "database", "SQLite for structured data")

    pack = build_context("What is AtoCore?", project_hint="atocore")

    # Project state should appear in context
    assert "--- Trusted Project State ---" in pack.formatted_context
    assert "Phase 0.5 complete" in pack.formatted_context
    assert "SQLite for structured data" in pack.formatted_context
    assert pack.project_state_chars > 0


def test_trusted_state_precedence_is_restated_in_retrieved_context(tmp_data_dir, sample_markdown):
    """When trusted state and retrieval coexist, the context should restate precedence explicitly."""
    init_db()
    init_project_state_schema()
    ingest_file(sample_markdown)

    set_state("atocore", "status", "phase", "Phase 2")
    pack = build_context("What is AtoCore?", project_hint="atocore")

    assert "If retrieved context conflicts with Trusted Project State above" in pack.formatted_context


def test_project_state_takes_priority_budget(tmp_data_dir, sample_markdown):
    """Test that project state is included even with tight budget."""
    init_db()
    init_project_state_schema()
    ingest_file(sample_markdown)

    set_state("atocore", "status", "phase", "Phase 1 in progress")

    # Small budget — project state should still be included
    pack = build_context("status?", project_hint="atocore", budget=500)
    assert "Phase 1 in progress" in pack.formatted_context


def test_project_state_respects_total_budget(tmp_data_dir, sample_markdown):
    """Trusted state should still fit within the total context budget."""
    init_db()
    init_project_state_schema()
    ingest_file(sample_markdown)

    set_state("atocore", "status", "notes", "x" * 400)
    set_state("atocore", "decision", "details", "y" * 400)

    pack = build_context("status?", project_hint="atocore", budget=120)
    assert pack.total_chars <= 120
    assert pack.budget_remaining >= 0
    assert len(pack.formatted_context) <= 120


def test_project_hint_matches_state_case_insensitively(tmp_data_dir, sample_markdown):
    """Project state lookup should not depend on exact casing."""
    init_db()
    init_project_state_schema()
    ingest_file(sample_markdown)

    set_state("AtoCore", "status", "phase", "Phase 2")
    pack = build_context("status?", project_hint="atocore")
    assert "Phase 2" in pack.formatted_context


def test_no_project_state_without_hint(tmp_data_dir, sample_markdown):
    """Test that project state is not included without project hint."""
    init_db()
    init_project_state_schema()
    ingest_file(sample_markdown)

    set_state("atocore", "status", "phase", "Phase 1")

    pack = build_context("What is AtoCore?")
    assert pack.project_state_chars == 0
    assert "--- Trusted Project State ---" not in pack.formatted_context