from __future__ import annotations

import json
import subprocess
from datetime import date
from pathlib import Path

from rein_aharness import brief_daily


def _git_repo(tmp_path: Path) -> Path:
    repo = tmp_path / "binky-control"
    repo.mkdir()
    subprocess.run(["git", "init"], cwd=repo, check=True, capture_output=True)
    subprocess.run(
        ["git", "config", "user.email", "test@example.com"],
        cwd=repo,
        check=True,
        capture_output=True,
    )
    subprocess.run(
        ["git", "config", "user.name", "test"],
        cwd=repo,
        check=True,
        capture_output=True,
    )
    (repo / "DecisionQueue.md").write_text(
        "# DecisionQueue\n\n## Open\n\n### DEC-2026-999\nstatus: prepared\n",
        encoding="utf-8",
    )
    (repo / "OfficeHourQueue.md").write_text("# OH\n", encoding="utf-8")
    (repo / "AutopilotWorkQueue.md").write_text("# AWQ\n", encoding="utf-8")
    (repo / "RiskRegister.md").write_text("# Risks\n", encoding="utf-8")
    (repo / "briefs").mkdir()
    subprocess.run(["git", "add", "."], cwd=repo, check=True, capture_output=True)
    subprocess.run(
        ["git", "commit", "-m", "init"],
        cwd=repo,
        check=True,
        capture_output=True,
    )
    return repo


def test_render_brief_format() -> None:
    md = brief_daily.render_brief(
        date(2026, 7, 22),
        {
            "decide_now": ["DEC-1 approve cutover"],
            "progress": ["WP-0005 finished"],
            "risks": [],
            "best_next_hour": "Approve DEC-1",
        },
    )
    assert md.startswith("# Daily Brief — 2026-07-22\n")
    assert "## Decide now" in md
    assert "## Progress" in md
    assert "## Risks" in md
    assert "## Best next hour" in md
    assert "No RiskRegister changes" in md
    assert "Approve DEC-1" in md


def test_parse_brief_response_fences() -> None:
    data = brief_daily.parse_brief_response(
        '```json\n{"decide_now":[],"progress":["x"],"risks":[],'
        '"best_next_hour":"none"}\n```'
    )
    assert data["progress"] == ["x"]


def test_run_brief_daily_mock(tmp_path: Path, monkeypatch) -> None:
    repo = _git_repo(tmp_path)
    monkeypatch.setattr(brief_daily.hub, "post_progress_event", lambda **kw: True)
    day = date(2026, 7, 22)

    def fake(prompt: str) -> str:
        assert "DecisionQueue" in prompt
        return json.dumps(
            {
                "decide_now": ["DEC-2026-999 go"],
                "progress": ["scaffold landed"],
                "risks": [],
                "best_next_hour": "no founder action needed today",
            }
        )

    result = brief_daily.run_brief_daily(
        repo, day=day, complete_fn=fake, force=True
    )
    assert result.ok
    assert result.wrote
    assert result.committed
    path = repo / "briefs" / "2026-07-22-daily-brief.md"
    assert path.is_file()
    text = path.read_text(encoding="utf-8")
    assert "DEC-2026-999" in text
    assert "scaffold landed" in text


def test_skip_existing_brief(tmp_path: Path, monkeypatch) -> None:
    repo = _git_repo(tmp_path)
    monkeypatch.setattr(brief_daily.hub, "post_progress_event", lambda **kw: True)
    day = date(2026, 7, 22)
    path = brief_daily.brief_path_for(repo, day)
    path.write_text("# Daily Brief — 2026-07-22\n\nalready\n", encoding="utf-8")
    subprocess.run(["git", "add", "."], cwd=repo, check=True, capture_output=True)
    subprocess.run(
        ["git", "commit", "-m", "brief"],
        cwd=repo,
        check=True,
        capture_output=True,
    )
    called = {"n": 0}

    def boom(prompt: str) -> str:
        called["n"] += 1
        raise AssertionError("should not call LLM")

    result = brief_daily.run_brief_daily(
        repo, day=day, complete_fn=boom, force=False
    )
    assert result.ok
    assert result.skipped_existing
    assert called["n"] == 0