"""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,
    parse_waves,
    parse_vram_config,
    WaveGroup,
    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", "TEST_PLAN.md": "# Tests", "IMPLEMENTATION.md": "# Impl"},
    )
    state, _ = determine_task_state(task_dir)
    assert state == TaskState.IMPLEMENT


def test_implementation_from_test_plan(tmp_path: Path) -> None:
    task_dir = _make_task(
        tmp_path,
        "impl-test-plan",
        {"SPEC.md": "# Spec", "TEST_PLAN.md": "# Tests"},
    )
    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


class TestVerdictParsing:
    """Tests for structured verdict status parsing (R1-R3 of fix-verdict-parsing SPEC)."""

    def test_pass_verdict_with_fail_in_findings(self, tmp_path: Path) -> None:
        ver = "## Status: PASS\n\nThe previous FAIL finding was resolved."
        task_dir = _make_task(tmp_path, "pass-with-fail", {"SPEC.md": "# Spec", "VERDICT.md": ver})
        state, _ = determine_task_state(task_dir)
        assert state == TaskState.DONE

    def test_pass_verdict_with_needs_review_in_body(self, tmp_path: Path) -> None:
        ver = "## Status: PASS\n\nNote: NEEDS_REVIEW was discussed but resolved."
        task_dir = _make_task(tmp_path, "pass-with-nr", {"SPEC.md": "# Spec", "VERDICT.md": ver})
        state, _ = determine_task_state(task_dir)
        assert state == TaskState.DONE

    def test_fail_verdict_structured(self, tmp_path: Path) -> None:
        ver = "## Status: FAIL\n\n2 tests PASS, 1 test FAIL."
        task_dir = _make_task(tmp_path, "fail-mentions-pass", {"SPEC.md": "# Spec", "VERDICT.md": ver})
        state, _ = determine_task_state(task_dir)
        assert state == TaskState.BLOCKED

    def test_needs_review_verdict_structured(self, tmp_path: Path) -> None:
        ver = "## Status: NEEDS_REVIEW\n\nSome items PASS but need review."
        task_dir = _make_task(tmp_path, "nr-mentions-pass", {"SPEC.md": "# Spec", "VERDICT.md": ver})
        state, _ = determine_task_state(task_dir)
        assert state == TaskState.BLOCKED

    def test_verdict_with_bold_status(self, tmp_path: Path) -> None:
        ver = "# Verdict\n\n- **Status**: PASS\n- **Timestamp**: 2025-01-01"
        task_dir = _make_task(tmp_path, "bold-status", {"SPEC.md": "# Spec", "VERDICT.md": ver})
        state, _ = determine_task_state(task_dir)
        assert state == TaskState.DONE

    def test_verdict_no_status_line(self, tmp_path: Path) -> None:
        ver = "# Verdict\nEverything looks good, PASS!"
        task_dir = _make_task(tmp_path, "no-status-line", {"SPEC.md": "# Spec", "VERDICT.md": ver})
        state, _ = determine_task_state(task_dir)
        assert state == TaskState.REFEREE  # no structured ## Status: header → ambiguous

    def test_verdict_no_status_no_keywords(self, tmp_path: Path) -> None:
        ver = "# Verdict\n\nNeeds further discussion."
        task_dir = _make_task(tmp_path, "no-status-no-keywords", {"SPEC.md": "# Spec", "VERDICT.md": ver})
        state, _ = determine_task_state(task_dir)
        assert state == TaskState.REFEREE


class TestStateMachineAlignment:
    """Tests for state machine alignment with orchestrate.md (R4)."""

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

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

    def test_both_bug_reports_shows_adv_bug_find(self, tmp_path: Path) -> None:
        task_dir = _make_task(
            tmp_path, "both-bugs",
            {"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_adv_bug_report_alone_shows_bug_find(self, tmp_path: Path) -> None:
        task_dir = _make_task(
            tmp_path, "adv-only",
            {"SPEC.md": "# Spec", "IMPLEMENTATION.md": "# Impl",
             "ADVERSARIAL_BUG_REPORT.md": "# Adv bugs only"},
        )
        state, _ = determine_task_state(task_dir)
        assert state == TaskState.BUG_FIND

    def test_spec_alone_shows_research(self, tmp_path: Path) -> None:
        task_dir = _make_task(tmp_path, "spec-only", {"SPEC.md": "# Spec"})
        state, _ = determine_task_state(task_dir)
        assert state == TaskState.RESEARCH

    def test_test_plan_shows_implement(self, tmp_path: Path) -> None:
        task_dir = _make_task(tmp_path, "testplan", {"SPEC.md": "# Spec", "TEST_PLAN.md": "# Tests"})
        state, _ = determine_task_state(task_dir)
        assert state == TaskState.IMPLEMENT

    def test_design_with_spec_shows_design(self, tmp_path: Path) -> None:
        task_dir = _make_task(tmp_path, "design-spec", {"SPEC.md": "# Spec", "DESIGN.md": "# Design"})
        state, _ = determine_task_state(task_dir)
        assert state == TaskState.DESIGN

    def test_doc_review_shows_doc_review(self, tmp_path: Path) -> None:
        task_dir = _make_task(
            tmp_path, "doc-review",
            {"SPEC.md": "# Spec", "IMPLEMENTATION.md": "# Impl",
             "BUG_REPORT.md": "# Bugs", "ADVERSARIAL_BUG_REPORT.md": "# Adv",
             "DOC_REVIEW.md": "# Docs"},
        )
        state, _ = determine_task_state(task_dir)
        assert state == TaskState.DOC_REVIEW


class TestTaskNameValidation:
    """Tests for filesystem-sourced task name validation."""

    def test_valid_task_names(self, tmp_path: Path) -> None:
        for name in ["my-task", "task_1", "Task-Name-123"]:
            d = tmp_path / name
            d.mkdir()
            (d / "SPEC.md").write_text("# Spec")
        tasks = discover_tasks(tmp_path)
        assert len(tasks) == 3

    def test_invalid_task_name_skipped(self, tmp_path: Path) -> None:
        valid = tmp_path / "good-task"
        valid.mkdir()
        (valid / "SPEC.md").write_text("# Spec")
        bad = tmp_path / "task with spaces"
        bad.mkdir()
        (bad / "SPEC.md").write_text("# Bad")
        tasks = discover_tasks(tmp_path)
        assert len(tasks) == 1
        assert tasks[0].name == "good-task"


class TestParseWaves:
    def test_parse_waves_from_template(self) -> None:
        content = "# Decomposition: Test\n\n## Sub-Tasks\n\n### Wave 1 (Parallel)\n- subtask-a: Implement core\n- subtask-b: Implement model\n\n### Wave 2 (Dependent)\n- subtask-c: Implement UI\n- subtask-d: Implement tests\n"
        waves = parse_waves(content)
        assert len(waves) == 2
        assert waves[0].wave_number == 1
        assert waves[0].label == "Parallel"
        assert waves[0].sub_task_names == ["subtask-a", "subtask-b"]
        assert waves[1].wave_number == 2
        assert waves[1].label == "Dependent"
        assert waves[1].sub_task_names == ["subtask-c", "subtask-d"]

    def test_parse_waves_empty(self) -> None:
        assert parse_waves("") == []
        assert parse_waves(None) == []

    def test_parse_waves_no_waves(self) -> None:
        content = "# No waves here\nJust text\n"
        assert parse_waves(content) == []

    def test_parse_waves_colon_format(self) -> None:
        content = "### Wave 1: Setup\n- task-alpha: Do setup\n### Wave 2: Execution\n- task-beta: Do execution\n"
        waves = parse_waves(content)
        assert len(waves) == 2
        assert waves[0].label == "Setup"
        assert waves[0].sub_task_names == ["task-alpha"]
        assert waves[1].label == "Execution"
        assert waves[1].sub_task_names == ["task-beta"]


class TestDecompositionContent:
    def test_task_has_decomposition_content(self, tmp_path: Path) -> None:
        task_dir = tmp_path / "my-task"
        task_dir.mkdir()
        (task_dir / "SPEC.md").write_text("# Spec")
        (task_dir / "DECOMPOSITION.md").write_text("### Wave 1 (Build)\n- sub-a: Build core\n")
        tasks = discover_tasks(tmp_path)
        assert len(tasks) == 1
        assert tasks[0].decomposition_content is not None
        assert "Wave 1" in tasks[0].decomposition_content
        assert len(tasks[0].waves) == 1
        assert tasks[0].waves[0].sub_task_names == ["sub-a"]


class TestParentSpecAndVramConfig:
    def test_parent_spec_content(self, tmp_path: Path) -> None:
        task_dir = tmp_path / "my-task"
        task_dir.mkdir()
        (task_dir / "SPEC.md").write_text("# Spec")
        (task_dir / "PARENT_SPEC.md").write_text("# Parent Context\nDetails here")
        tasks = discover_tasks(tmp_path)
        assert tasks[0].parent_spec_content is not None
        assert "Parent Context" in tasks[0].parent_spec_content

    def test_vram_config_content(self, tmp_path: Path) -> None:
        task_dir = tmp_path / "my-task"
        task_dir.mkdir()
        (task_dir / "SPEC.md").write_text("# Spec")
        (task_dir / "VRAM_CONFIG.md").write_text("# VRAM\nmodel: llama-3")
        tasks = discover_tasks(tmp_path)
        assert tasks[0].vram_config_content is not None
        assert "llama-3" in tasks[0].vram_config_content

    def test_subtask_has_parent_spec(self, tmp_path: Path) -> None:
        tasks_dir = tmp_path
        parent = tasks_dir / "parent-task"
        parent.mkdir()
        (parent / "SPEC.md").write_text("# Parent")
        subtasks_dir = parent / "subtasks"
        subtasks_dir.mkdir()
        sub = subtasks_dir / "child-a"
        sub.mkdir()
        (sub / "SPEC.md").write_text("# Child")
        (sub / "PARENT_SPEC.md").write_text("# Parent Spec for child")
        (sub / "VRAM_CONFIG.md").write_text("# VRAM config")
        sub_tasks = parse_sub_tasks(parent)
        assert len(sub_tasks) == 1
        # discover_tasks doesn't recurse into subtasks for content, but parse_sub_tasks returns SubTask objects
        # Verify the files exist
        assert (sub / "PARENT_SPEC.md").exists()


class TestStatusReason:
    def test_done_task_reason(self, tmp_path: Path) -> None:
        task_dir = tmp_path / "done-task"
        task_dir.mkdir()
        (task_dir / "VERDICT.md").write_text("## Status: PASS\nAll good.\n")
        (task_dir / "SPEC.md").write_text("# Spec\n")
        tasks = discover_tasks(tmp_path)
        assert tasks[0].status_reason == "Verdict: PASS"

    def test_blocked_fail_reason(self, tmp_path: Path) -> None:
        task_dir = tmp_path / "blocked-task"
        task_dir.mkdir()
        (task_dir / "VERDICT.md").write_text("## Status: FAIL\nBroken.\n")
        (task_dir / "SPEC.md").write_text("# Spec\n")
        tasks = discover_tasks(tmp_path)
        assert "FAIL" in tasks[0].status_reason

    def test_blocked_needs_review_reason(self, tmp_path: Path) -> None:
        task_dir = tmp_path / "review-task"
        task_dir.mkdir()
        (task_dir / "VERDICT.md").write_text("## Status: NEEDS_REVIEW\nUnclear.\n")
        (task_dir / "SPEC.md").write_text("# Spec\n")
        tasks = discover_tasks(tmp_path)
        assert "NEEDS_REVIEW" in tasks[0].status_reason

    def test_bug_find_implementation_reason(self, tmp_path: Path) -> None:
        task_dir = tmp_path / "impl-task"
        task_dir.mkdir()
        (task_dir / "IMPLEMENTATION.md").write_text("# Implementation\n")
        tasks = discover_tasks(tmp_path)
        assert "Implementation complete" in tasks[0].status_reason

    def test_backlog_reason(self, tmp_path: Path) -> None:
        task_dir = tmp_path / "empty-task"
        task_dir.mkdir()
        tasks = discover_tasks(tmp_path)
        assert "No artifacts" in tasks[0].status_reason