"""Tests for automaton.dashboard.core.task."""

from pathlib import Path

import pytest

from automaton.dashboard.core.task import (
    determine_task_state,
    discover_tasks,
    parse_sub_tasks,
    TaskState,
)


def _make_task(tmp_path: Path, name: str, artifacts: dict[str, str]) -> Path:
    """Create a task folder with the given artifact contents."""
    task_dir = tmp_path / name
    task_dir.mkdir(parents=True)
    for filename, content in artifacts.items():
        (task_dir / filename).write_text(content)
    return task_dir


def test_backlog_state(tmp_path: Path) -> None:
    task_dir = _make_task(tmp_path, "backlog-task", {})
    state, artifacts = determine_task_state(task_dir)
    assert state == TaskState.BACKLOG
    assert not artifacts


def test_research_state(tmp_path: Path) -> None:
    task_dir = _make_task(tmp_path, "research-task", {"SPEC.md": "# Spec"})
    state, artifacts = determine_task_state(task_dir)
    assert state == TaskState.RESEARCH
    assert "SPEC.md" in artifacts


def test_implementation_state(tmp_path: Path) -> None:
    task_dir = _make_task(
        tmp_path,
        "impl-task",
        {"SPEC.md": "# Spec", "IMPLEMENTATION.md": "# Impl"},
    )
    state, _ = determine_task_state(task_dir)
    assert state == TaskState.IMPLEMENT


def test_bug_find_state(tmp_path: Path) -> None:
    task_dir = _make_task(
        tmp_path,
        "bug-task",
        {"SPEC.md": "# Spec", "IMPLEMENTATION.md": "# Impl", "BUG_REPORT.md": "# Bugs"},
    )
    state, _ = determine_task_state(task_dir)
    assert state == TaskState.BUG_FIND


def test_adv_bug_find_state(tmp_path: Path) -> None:
    task_dir = _make_task(
        tmp_path,
        "adv-task",
        {
            "SPEC.md": "# Spec",
            "IMPLEMENTATION.md": "# Impl",
            "BUG_REPORT.md": "# Bugs",
            "ADVERSARIAL_BUG_REPORT.md": "# Adv",
        },
    )
    state, _ = determine_task_state(task_dir)
    assert state == TaskState.ADV_BUG_FIND


def test_done_state(tmp_path: Path) -> None:
    task_dir = _make_task(
        tmp_path,
        "done-task",
        {"SPEC.md": "# Spec", "VERDICT.md": "## Status: PASS"},
    )
    state, _ = determine_task_state(task_dir)
    assert state == TaskState.DONE


def test_blocked_state(tmp_path: Path) -> None:
    task_dir = _make_task(
        tmp_path,
        "blocked-task",
        {"SPEC.md": "# Spec", "VERDICT.md": "## Status: FAIL"},
    )
    state, _ = determine_task_state(task_dir)
    assert state == TaskState.BLOCKED


def test_empty_verdict_is_blocked(tmp_path: Path) -> None:
    task_dir = _make_task(tmp_path, "empty-verdict", {"VERDICT.md": ""})
    state, _ = determine_task_state(task_dir)
    assert state == TaskState.BLOCKED


def test_parse_sub_tasks(tmp_path: Path) -> None:
    parent = tmp_path / "parent"
    parent.mkdir()
    sub = parent / "subtasks" / "sub-a"
    sub.mkdir(parents=True)
    (sub / "SPEC.md").write_text("# Spec")
    (sub / "VERDICT.md").write_text("## Status: PASS")

    sub_tasks = parse_sub_tasks(parent)
    assert len(sub_tasks) == 1
    assert sub_tasks[0].name == "sub-a"
    assert sub_tasks[0].has_verdict is True
    assert sub_tasks[0].verdict_status == "PASS"


def test_discover_tasks(tmp_path: Path) -> None:
    _make_task(tmp_path, "aaa", {"SPEC.md": "# Spec"})
    _make_task(tmp_path, "zzz", {"VERDICT.md": "## Status: PASS"})
    tasks = discover_tasks(tmp_path)
    assert len(tasks) == 2
    # Done task should be first (sorted by advancement).
    assert tasks[0].state == TaskState.DONE
    assert tasks[1].state == TaskState.RESEARCH


def test_discover_tasks_skips_subtasks_root(tmp_path: Path) -> None:
    parent = tmp_path / "parent"
    parent.mkdir()
    (parent / "SPEC.md").write_text("# Spec")
    (parent / "subtasks" / "sub-a").mkdir(parents=True)
    (parent / "subtasks" / "sub-a" / "SPEC.md").write_text("# Sub")

    tasks = discover_tasks(tmp_path)
    assert len(tasks) == 1
    assert tasks[0].name == "parent"
    assert len(tasks[0].sub_tasks) == 1