"""Tests for the simplified ClickUp scheduler flow."""

from __future__ import annotations

from dataclasses import dataclass, field
from datetime import UTC, datetime
from unittest.mock import MagicMock

from cheddahbot.clickup import ClickUpTask
from cheddahbot.scheduler import Scheduler

# ── Fixtures ──


_PR_MAPPING = {
    "tool": "write_press_releases",
    "auto_execute": True,
    "field_mapping": {
        "topic": "task_name",
        "company_name": "Customer",
    },
}


@dataclass
class _FakeClickUpConfig:
    api_token: str = "pk_test"
    workspace_id: str = "ws_1"
    space_id: str = "space_1"
    poll_interval_minutes: int = 20
    poll_statuses: list[str] = field(default_factory=lambda: ["to do"])
    review_status: str = "internal review"
    in_progress_status: str = "in progress"
    automation_status: str = "automation underway"
    error_status: str = "error"
    task_type_field_name: str = "Work Category"
    default_auto_execute: bool = True
    skill_map: dict = field(default_factory=lambda: {"Press Release": _PR_MAPPING})
    enabled: bool = True


@dataclass
class _FakeSchedulerConfig:
    poll_interval_seconds: int = 60
    heartbeat_interval_minutes: int = 30


@dataclass
class _FakeConfig:
    clickup: _FakeClickUpConfig = field(default_factory=_FakeClickUpConfig)
    scheduler: _FakeSchedulerConfig = field(default_factory=_FakeSchedulerConfig)
    identity_dir: str = "identity"


def _make_task(task_id, name, task_type, due_date="", custom_fields=None):
    """Build a ClickUpTask for testing."""
    return ClickUpTask(
        id=task_id,
        name=name,
        status="to do",
        task_type=task_type,
        due_date=due_date,
        custom_fields=custom_fields or {},
    )


def _now_ms():
    return int(datetime.now(UTC).timestamp() * 1000)


_FIELDS = {"Customer": "Acme"}


# ── Tests ──


class TestPollClickup:
    """Test the simplified _poll_clickup method."""

    def test_skips_task_with_no_space_id(self, tmp_db):
        config = _FakeConfig()
        config.clickup.space_id = ""
        agent = MagicMock()
        scheduler = Scheduler(config, tmp_db, agent)

        # Should not raise — just log warning and return
        scheduler._poll_clickup()

    def test_skips_task_with_empty_skill_map(self, tmp_db):
        config = _FakeConfig()
        config.clickup.skill_map = {}
        agent = MagicMock()
        scheduler = Scheduler(config, tmp_db, agent)

        # Should skip without calling any API
        scheduler._poll_clickup()

    def _make_mock_client(self, tasks=None, field_filter=None):
        """Create a mock ClickUp client with proper return types."""
        mock_client = MagicMock()
        mock_client.get_tasks_from_space.return_value = tasks or []
        mock_client.get_list_ids_from_space.return_value = {"list_1"}
        mock_client.discover_field_filter.return_value = field_filter
        return mock_client

    def test_skips_task_with_no_due_date(self, tmp_db):
        """Tasks with no due date should be skipped."""
        config = _FakeConfig()
        agent = MagicMock()
        scheduler = Scheduler(config, tmp_db, agent)

        task = _make_task(
            "t1",
            "PR for Acme",
            "Press Release",
            due_date="",
        )

        scheduler._clickup_client = self._make_mock_client(
            tasks=[task],
        )
        scheduler._poll_clickup()

        scheduler._clickup_client.update_task_status.assert_not_called()

    def test_skips_unmapped_task_type(self, tmp_db):
        """Tasks with unmapped task_type should be skipped."""
        config = _FakeConfig()
        agent = MagicMock()
        scheduler = Scheduler(config, tmp_db, agent)

        due = str(_now_ms() + 86400000)
        task = _make_task(
            "t1",
            "Content task",
            "Content Creation",
            due_date=due,
        )

        scheduler._clickup_client = self._make_mock_client(
            tasks=[task],
        )
        scheduler._poll_clickup()

        scheduler._clickup_client.update_task_status.assert_not_called()


class TestExecuteTask:
    """Test the simplified _execute_task method."""

    def test_success_flow(self, tmp_db):
        """Successful execution: tool called, automation underway set."""
        config = _FakeConfig()
        agent = MagicMock()
        agent._tools = MagicMock()
        agent._tools.execute.return_value = "Pipeline completed successfully"
        scheduler = Scheduler(config, tmp_db, agent)

        mock_client = MagicMock()
        mock_client.update_task_status.return_value = True
        scheduler._clickup_client = mock_client

        due = str(_now_ms() + 86400000)
        task = _make_task(
            "t1",
            "PR for Acme",
            "Press Release",
            due_date=due,
            custom_fields=_FIELDS,
        )
        scheduler._execute_task(task)

        mock_client.update_task_status.assert_any_call(
            "t1",
            "automation underway",
        )
        agent._tools.execute.assert_called_once()

    def test_failure_flow(self, tmp_db):
        """Failed: error comment posted, status set to 'error'."""
        config = _FakeConfig()
        agent = MagicMock()
        agent._tools = MagicMock()
        agent._tools.execute.side_effect = RuntimeError("API timeout")
        scheduler = Scheduler(config, tmp_db, agent)

        mock_client = MagicMock()
        mock_client.update_task_status.return_value = True
        mock_client.add_comment.return_value = True
        scheduler._clickup_client = mock_client

        due = str(_now_ms() + 86400000)
        task = _make_task(
            "t1",
            "PR for Acme",
            "Press Release",
            due_date=due,
            custom_fields=_FIELDS,
        )
        scheduler._execute_task(task)

        mock_client.update_task_status.assert_any_call("t1", "error")
        mock_client.add_comment.assert_called_once()
        comment_text = mock_client.add_comment.call_args[0][1]
        assert "failed" in comment_text.lower()


class TestFieldFilterDiscovery:
    """Test _discover_field_filter caching."""

    def test_caches_after_first_call(self, tmp_db):
        config = _FakeConfig()
        agent = MagicMock()
        scheduler = Scheduler(config, tmp_db, agent)

        mock_client = MagicMock()
        mock_client.get_list_ids_from_space.return_value = {"list_1"}
        mock_client.discover_field_filter.return_value = {
            "field_id": "cf_wc",
            "options": {"Press Release": "opt_pr"},
        }
        mock_client.get_tasks_from_space.return_value = []
        scheduler._clickup_client = mock_client

        # First poll should discover
        scheduler._poll_clickup()
        assert scheduler._field_filter_cache is not None
        assert scheduler._field_filter_cache["field_id"] == "cf_wc"

        # Second poll reuses cache
        mock_client.discover_field_filter.reset_mock()
        scheduler._poll_clickup()
        mock_client.discover_field_filter.assert_not_called()