"""WorkflowEngine integration tests using a mock build_agent (no real OpenRouter calls)."""

from __future__ import annotations

import json
import textwrap
from pathlib import Path
from typing import Any
from unittest.mock import AsyncMock, MagicMock, patch
from uuid import UUID, uuid4

import pytest

from my_deepagent.artifact_schema import ArtifactSchemaRegistry
from my_deepagent.binding import BackendAvailability, PersonaConsentStore
from my_deepagent.config import load_config
from my_deepagent.engine import WorkflowEngine, _render_report_md
from my_deepagent.enums import ApprovalDecisionAction, Backend, RunState
from my_deepagent.persistence.db import Database
from my_deepagent.persona import load_personas_from_dir
from my_deepagent.workflow import WorkflowTemplate

# ---------------------------------------------------------------------------
# Path constants
# ---------------------------------------------------------------------------

_DOCS = Path(__file__).resolve().parents[2] / "docs" / "schemas"
_ARTIFACTS_ROOT = _DOCS / "artifacts"


# ---------------------------------------------------------------------------
# Helper: valid spec artifact
# ---------------------------------------------------------------------------


def _valid_spec_artifact(run_id: UUID) -> dict[str, Any]:
    return {
        "runId": str(run_id),
        "phaseKey": "spec",
        "requirements": "Implement feature X with full test coverage",
        "acceptance_criteria": ["All tests pass", "Coverage >= 90%"],
        "approach": "TDD: write tests first, then implement the feature",
        "risks": [],
    }


# ---------------------------------------------------------------------------
# Fixtures
# ---------------------------------------------------------------------------


@pytest.fixture
def personas() -> list[Any]:
    return load_personas_from_dir(_DOCS / "personas")


@pytest.fixture
def artifact_registry() -> ArtifactSchemaRegistry:
    return ArtifactSchemaRegistry(roots=[_ARTIFACTS_ROOT])


@pytest.fixture
def consent_store(tmp_path: Path) -> PersonaConsentStore:
    return PersonaConsentStore(tmp_path / "consents.json")


@pytest.fixture
def available_backends() -> BackendAvailability:
    return BackendAvailability(available_backends=frozenset(Backend))


@pytest.fixture
async def db(tmp_path: Path) -> Database:
    url = f"sqlite+aiosqlite:///{tmp_path / 'test.sqlite3'}"
    database = Database(url)
    await database.init_schema()
    return database


@pytest.fixture
def governance(tmp_path: Path) -> Path:
    """Create governance consent file so require_consent passes."""
    data_dir = tmp_path / "data"
    data_dir.mkdir(parents=True)
    (data_dir / "governance-accepted.json").write_text(
        '{"accepted_at":"2026-01-01T00:00:00+00:00"}'
    )
    return data_dir


def _minimal_workflow_yaml(
    tmp_path: Path, schema_id: str = "dev/spec@1", gates: list[str] | None = None
) -> WorkflowTemplate:
    """Build a single-phase workflow template (in-memory) for testing."""

    phase_data: dict[str, object] = {
        "key": "spec",
        "title": "Write spec",
        "risk": "low",
        "role": "spec_writer",
        "instructions": "Write a detailed specification document with at least ten words here.",
        "timeout_seconds": 10,
        "expected_artifact": {
            "path": "artifacts/spec.json",
            "schema": schema_id,
        },
    }
    if gates:
        phase_data["gates"] = gates

    raw = {
        "name": "test-workflow",
        "version": 1,
        "description": "unit test workflow",
        "roles": [
            {
                "id": "spec_writer",
                "required_capabilities": ["spec_write", "phase_planning"],
                "preferred_backends": ["openrouter"],
            }
        ],
        "phases": [phase_data],
    }
    return WorkflowTemplate.model_validate(raw)


def _make_engine(
    database: Database,
    tmp_path: Path,
    personas: list[Any],
    artifact_registry: ArtifactSchemaRegistry,
    consent_store: PersonaConsentStore,
    available_backends: BackendAvailability,
    approval_cb: Any,
) -> WorkflowEngine:
    cfg = load_config(
        workspace_root=tmp_path,
        data_dir=tmp_path / "data",
        database_url=f"sqlite+aiosqlite:///{tmp_path / 'test.sqlite3'}",
    )
    return WorkflowEngine(
        db=database,
        config=cfg,
        persona_pool=personas,
        artifact_registry=artifact_registry,
        consent_store=consent_store,
        available_backends=available_backends,
        approval_callback=approval_cb,
    )


# ---------------------------------------------------------------------------
# Unit-level tests (no DB, no agent)
# ---------------------------------------------------------------------------


class TestRunEventUtils:
    """Tests for run_event helpers."""

    def test_run_idempotency_key_deterministic(self) -> None:
        from my_deepagent.run_event import RunEventType, run_idempotency_key

        run_id = uuid4()
        k1 = run_idempotency_key(RunEventType.PHASE_STARTED, run_id, phase_key="spec", attempt=1)
        k2 = run_idempotency_key(RunEventType.PHASE_STARTED, run_id, attempt=1, phase_key="spec")
        assert k1 == k2

    def test_run_idempotency_key_contains_event_type(self) -> None:
        from my_deepagent.run_event import RunEventType, run_idempotency_key

        run_id = uuid4()
        key = run_idempotency_key(RunEventType.RUN_CREATED, run_id)
        assert "run.created" in key
        assert str(run_id) in key

    def test_run_idempotency_key_extra_sorted(self) -> None:
        from my_deepagent.run_event import RunEventType, run_idempotency_key

        run_id = uuid4()
        key = run_idempotency_key(RunEventType.PHASE_FAILED, run_id, z_key="z", a_key="a")
        # extra keys must be in sorted order
        assert key.index("a_key") < key.index("z_key")


class TestBuildEnvelope:
    """Tests for _build_envelope output format."""

    def test_envelope_contains_markers(self) -> None:
        import yaml

        raw = textwrap.dedent("""\
            name: t
            version: 1
            roles:
              - id: r
                required_capabilities: [spec_write, phase_planning]
            phases:
              - key: p
                title: T
                risk: low
                role: r
                instructions: Must be at least ten characters long here.
                expected_artifact:
                  path: out.json
                  schema: dev/spec@1
        """)
        template = WorkflowTemplate.model_validate(yaml.safe_load(raw))
        phase = template.phases[0]
        run_id = uuid4()
        phase_id = uuid4()

        from my_deepagent.engine import WorkflowEngine

        # Access internal _build_envelope via instance
        cfg = load_config()
        engine = WorkflowEngine.__new__(WorkflowEngine)
        engine._config = cfg

        envelope = engine._build_envelope(run_id, phase_id, phase, 1, Path("/tmp/out.json"))
        assert f"MYDEEPAGENT_PROMPT_BEGIN {phase_id}" in envelope
        assert f"MYDEEPAGENT_PROMPT_END {phase_id}" in envelope
        assert str(run_id) in envelope
        assert "dev/spec@1" in envelope

    def test_repair_note_appears_on_attempt_2(self) -> None:
        import yaml

        raw = textwrap.dedent("""\
            name: t
            version: 1
            roles:
              - id: r
                required_capabilities: [spec_write, phase_planning]
            phases:
              - key: p
                title: T
                risk: low
                role: r
                instructions: Must be at least ten characters long here.
                expected_artifact:
                  path: out.json
                  schema: dev/spec@1
        """)
        template = WorkflowTemplate.model_validate(yaml.safe_load(raw))
        phase = template.phases[0]
        run_id = uuid4()
        phase_id = uuid4()

        cfg = load_config()
        engine = WorkflowEngine.__new__(WorkflowEngine)
        engine._config = cfg

        envelope_1 = engine._build_envelope(run_id, phase_id, phase, 1, Path("/tmp/out.json"))
        envelope_2 = engine._build_envelope(run_id, phase_id, phase, 2, Path("/tmp/out.json"))

        assert "REPAIR ATTEMPT" not in envelope_1
        assert "REPAIR ATTEMPT" in envelope_2


class TestRenderReportMd:
    """Tests for _render_report_md output format."""

    def test_render_contains_run_id(self) -> None:
        run_id = str(uuid4())
        report: dict[str, Any] = {
            "runId": run_id,
            "templateHash": "abc123",
            "status": "completed",
            "phases": [],
            "artifacts": [],
            "events": [],
            "unresolved": [],
            "endedAt": "2026-01-01T00:00:00+00:00",
            "error": None,
        }
        md = _render_report_md(report)
        assert run_id in md
        assert "completed" in md

    def test_render_includes_error_section(self) -> None:
        report = {
            "runId": str(uuid4()),
            "templateHash": "",
            "status": "failed",
            "phases": [],
            "artifacts": [],
            "events": [],
            "unresolved": [],
            "endedAt": "2026-01-01T00:00:00+00:00",
            "error": "something went wrong",
        }
        md = _render_report_md(report)
        assert "Error" in md
        assert "something went wrong" in md


# ---------------------------------------------------------------------------
# Integration tests (real DB, mock agent)
# ---------------------------------------------------------------------------


@pytest.mark.asyncio
async def test_engine_phase_completes_with_valid_artifact(
    tmp_path: Path,
    personas: list[Any],
    artifact_registry: ArtifactSchemaRegistry,
    consent_store: PersonaConsentStore,
    available_backends: BackendAvailability,
    db: Database,
) -> None:
    """Engine: mock agent writes a valid artifact → RunState.COMPLETED + report written."""
    template = _minimal_workflow_yaml(tmp_path)
    auto_approve = AsyncMock(return_value=ApprovalDecisionAction.APPROVE)
    engine = _make_engine(
        db, tmp_path, personas, artifact_registry, consent_store, available_backends, auto_approve
    )

    def _fake_build_agent(
        persona: Any, config: Any, *, root_dir: Path, middleware: list[Any], **_kw: Any
    ) -> Any:
        run_id_placeholder = uuid4()  # placeholder; overwritten by test side-effect below

        async def _ainvoke(messages: Any, **_kwargs: Any) -> Any:
            # Write a valid spec.json to the expected path
            expected = root_dir / "artifacts" / "spec.json"
            expected.parent.mkdir(parents=True, exist_ok=True)
            artifact = _valid_spec_artifact(run_id_placeholder)
            content = json.dumps(artifact)
            expected.write_text(content, encoding="utf-8")
            # Trigger artifact watcher middleware if present
            for mw in middleware:
                if hasattr(mw, "awrap_tool_call"):
                    req = MagicMock()
                    req.tool_call = {
                        "name": "write_file",
                        "args": {"file_path": str(expected), "content": content},
                        "id": "x",
                    }
                    await mw.awrap_tool_call(req, AsyncMock(return_value=MagicMock()))
            return {"messages": []}

        agent = MagicMock()
        agent.ainvoke = _ainvoke
        return agent

    with patch("my_deepagent.engine.build_agent", side_effect=_fake_build_agent):
        result = await engine.run(
            template,
            repo_path=tmp_path,
            base_branch="main",
            requirements_md="test",
        )

    assert result.state == RunState.COMPLETED
    assert result.error is None
    assert result.final_report_path is not None
    assert result.final_report_path.exists()


@pytest.mark.asyncio
async def test_engine_invalid_artifact_triggers_repair_then_fails(
    tmp_path: Path,
    personas: list[Any],
    artifact_registry: ArtifactSchemaRegistry,
    consent_store: PersonaConsentStore,
    available_backends: BackendAvailability,
    db: Database,
) -> None:
    """Engine: agent always writes invalid JSON → repair 1x → RunState.FAILED."""
    template = _minimal_workflow_yaml(tmp_path)
    auto_approve = AsyncMock(return_value=ApprovalDecisionAction.APPROVE)
    engine = _make_engine(
        db, tmp_path, personas, artifact_registry, consent_store, available_backends, auto_approve
    )

    call_count = 0

    def _fake_build_agent(
        persona: Any, config: Any, *, root_dir: Path, middleware: list[Any], **_kw: Any
    ) -> Any:
        async def _ainvoke(messages: Any, **_kwargs: Any) -> Any:
            nonlocal call_count
            call_count += 1
            expected = root_dir / "artifacts" / "spec.json"
            expected.parent.mkdir(parents=True, exist_ok=True)
            # Write invalid artifact (missing required fields)
            invalid = {"wrong_field": "bad data"}
            content = json.dumps(invalid)
            expected.write_text(content, encoding="utf-8")
            for mw in middleware:
                if hasattr(mw, "awrap_tool_call"):
                    req = MagicMock()
                    req.tool_call = {
                        "name": "write_file",
                        "args": {"file_path": str(expected), "content": content},
                        "id": "x",
                    }
                    await mw.awrap_tool_call(req, AsyncMock(return_value=MagicMock()))
            return {"messages": []}

        agent = MagicMock()
        agent.ainvoke = _ainvoke
        return agent

    with patch("my_deepagent.engine.build_agent", side_effect=_fake_build_agent):
        result = await engine.run(
            template,
            repo_path=tmp_path,
            base_branch="main",
            requirements_md="test",
        )

    assert result.state == RunState.FAILED
    assert result.error is not None
    # Agent was invoked twice (original + repair)
    assert call_count == 2


@pytest.mark.asyncio
async def test_engine_agent_writes_nothing_exhausts_timeout(
    tmp_path: Path,
    personas: list[Any],
    artifact_registry: ArtifactSchemaRegistry,
    consent_store: PersonaConsentStore,
    available_backends: BackendAvailability,
    db: Database,
) -> None:
    """Engine: agent writes no artifact → timeout x2 → RunState.FAILED + timeout_exhausted."""
    template = _minimal_workflow_yaml(tmp_path)
    auto_approve = AsyncMock(return_value=ApprovalDecisionAction.APPROVE)
    engine = _make_engine(
        db, tmp_path, personas, artifact_registry, consent_store, available_backends, auto_approve
    )

    invoke_count = 0

    def _fake_build_agent(
        persona: Any, config: Any, *, root_dir: Path, middleware: list[Any], **_kw: Any
    ) -> Any:
        async def _ainvoke(messages: Any, **_kwargs: Any) -> Any:
            nonlocal invoke_count
            invoke_count += 1
            # Write NOTHING — simulate timeout by returning immediately
            return {"messages": []}

        agent = MagicMock()
        agent.ainvoke = _ainvoke
        return agent

    with patch("my_deepagent.engine.build_agent", side_effect=_fake_build_agent):
        result = await engine.run(
            template,
            repo_path=tmp_path,
            base_branch="main",
        )

    assert result.state == RunState.FAILED
    assert result.error is not None
    assert invoke_count == 2


@pytest.mark.asyncio
async def test_engine_approval_reject_fails_run(
    tmp_path: Path,
    personas: list[Any],
    artifact_registry: ArtifactSchemaRegistry,
    consent_store: PersonaConsentStore,
    available_backends: BackendAvailability,
    db: Database,
) -> None:
    """Engine: approval callback returns REJECT → RunState.FAILED + approval_rejected."""
    template = _minimal_workflow_yaml(tmp_path, gates=["human"])
    reject_cb = AsyncMock(return_value=ApprovalDecisionAction.REJECT)
    engine = _make_engine(
        db, tmp_path, personas, artifact_registry, consent_store, available_backends, reject_cb
    )

    def _fake_build_agent(
        persona: Any, config: Any, *, root_dir: Path, middleware: list[Any], **_kw: Any
    ) -> Any:
        async def _ainvoke(messages: Any, **_kwargs: Any) -> Any:
            expected = root_dir / "artifacts" / "spec.json"
            expected.parent.mkdir(parents=True, exist_ok=True)
            artifact = _valid_spec_artifact(uuid4())
            content = json.dumps(artifact)
            expected.write_text(content, encoding="utf-8")
            for mw in middleware:
                if hasattr(mw, "awrap_tool_call"):
                    req = MagicMock()
                    req.tool_call = {
                        "name": "write_file",
                        "args": {"file_path": str(expected), "content": content},
                        "id": "x",
                    }
                    await mw.awrap_tool_call(req, AsyncMock(return_value=MagicMock()))
            return {"messages": []}

        agent = MagicMock()
        agent.ainvoke = _ainvoke
        return agent

    with patch("my_deepagent.engine.build_agent", side_effect=_fake_build_agent):
        result = await engine.run(
            template,
            repo_path=tmp_path,
            base_branch="main",
        )

    assert result.state == RunState.FAILED
    assert result.error is not None


@pytest.mark.asyncio
async def test_engine_approval_abort_aborts_run(
    tmp_path: Path,
    personas: list[Any],
    artifact_registry: ArtifactSchemaRegistry,
    consent_store: PersonaConsentStore,
    available_backends: BackendAvailability,
    db: Database,
) -> None:
    """Engine: approval callback returns ABORT → RunState.ABORTED."""
    template = _minimal_workflow_yaml(tmp_path, gates=["human"])
    abort_cb = AsyncMock(return_value=ApprovalDecisionAction.ABORT)
    engine = _make_engine(
        db, tmp_path, personas, artifact_registry, consent_store, available_backends, abort_cb
    )

    def _fake_build_agent(
        persona: Any, config: Any, *, root_dir: Path, middleware: list[Any], **_kw: Any
    ) -> Any:
        async def _ainvoke(messages: Any, **_kwargs: Any) -> Any:
            expected = root_dir / "artifacts" / "spec.json"
            expected.parent.mkdir(parents=True, exist_ok=True)
            artifact = _valid_spec_artifact(uuid4())
            content = json.dumps(artifact)
            expected.write_text(content, encoding="utf-8")
            for mw in middleware:
                if hasattr(mw, "awrap_tool_call"):
                    req = MagicMock()
                    req.tool_call = {
                        "name": "write_file",
                        "args": {"file_path": str(expected), "content": content},
                        "id": "x",
                    }
                    await mw.awrap_tool_call(req, AsyncMock(return_value=MagicMock()))
            return {"messages": []}

        agent = MagicMock()
        agent.ainvoke = _ainvoke
        return agent

    with patch("my_deepagent.engine.build_agent", side_effect=_fake_build_agent):
        result = await engine.run(
            template,
            repo_path=tmp_path,
            base_branch="main",
        )

    assert result.state == RunState.ABORTED
    assert result.error is not None