from pathlib import Path

import pytest
from PyQt6.QtWidgets import QApplication

from syncvito.config_store import ConfigStore
from syncvito.coordinator import SyncCoordinator
from syncvito.models import AppConfig, SyncTask, TaskRuntimeState
from syncvito.sync_engine import BlockedFile, SyncResult


@pytest.fixture
def coordinator(tmp_path: Path):
    application = QApplication.instance() or QApplication([])
    task = SyncTask(name="AppData", source=str(tmp_path / "source"), target=str(tmp_path / "target"))
    coordinator = SyncCoordinator(AppConfig(tasks=[task]), ConfigStore(tmp_path / "config.json"))
    yield coordinator
    coordinator._schedule_timer.stop()
    coordinator._retry_timer.stop()
    coordinator.stop()
    assert application is not None


def test_many_locks_have_compact_banner_and_full_paths_in_log(coordinator: SyncCoordinator) -> None:
    banners = []
    logs = []
    coordinator.lock_changed.connect(banners.append)
    coordinator.log_created.connect(lambda *entry: logs.append(entry))
    blocked = [BlockedFile(Path(f"AppData/Programm{index}/Cookies")) for index in range(300)]
    task = coordinator.config.tasks[0]

    coordinator._on_finished(task.id, SyncResult(copied=123, blocked=blocked))

    assert len(banners[-1]) < 400
    assert "123 kopiert" in banners[-1]
    assert "300 Dateien gesperrt" in banners[-1]
    assert "unvollständig" in banners[-1]
    assert len(logs) == 301
    assert str(blocked[-1].path) in logs[-1][2]
    assert coordinator.task_state(task.id) is TaskRuntimeState.WAITING_FOR_RELEASE

    coordinator._on_finished(task.id, SyncResult(copied=300))
    assert banners[-1] == ""
    assert task.id not in coordinator._retry_tasks
    assert coordinator.task_state(task.id) is TaskRuntimeState.ACTIVE


def test_errors_are_visible_even_when_other_files_are_locked(coordinator: SyncCoordinator) -> None:
    logs = []
    coordinator.log_created.connect(lambda *entry: logs.append(entry))
    task = coordinator.config.tasks[0]
    coordinator._on_finished(task.id, SyncResult(blocked=[BlockedFile(Path("Cookies"))], errors=["Zugriff verweigert"]))
    assert coordinator.task_state(task.id) is TaskRuntimeState.ERROR
    assert any(level == "Fehler" and detail == "Zugriff verweigert" for _, level, detail in logs)


@pytest.mark.parametrize("all_locked", [False, True])
def test_retry_can_run_after_partial_release(
    coordinator: SyncCoordinator, monkeypatch: pytest.MonkeyPatch, all_locked: bool
) -> None:
    task = coordinator.config.tasks[0]
    coordinator._retry_tasks[task.id] = [Path("dauerhaft"), Path("freigegeben")]
    queued = []
    monkeypatch.setattr(coordinator, "enqueue", queued.append)
    monkeypatch.setattr("syncvito.coordinator.is_file_locked", lambda path: all_locked or path.name == "dauerhaft")
    coordinator._check_retries()
    assert queued == ([] if all_locked else [task.id])


def test_retry_queues_all_ready_tasks(coordinator: SyncCoordinator, monkeypatch: pytest.MonkeyPatch) -> None:
    coordinator._retry_tasks = {"first": [], "second": []}
    queued = []
    monkeypatch.setattr(coordinator, "enqueue", queued.append)
    coordinator._check_retries()
    assert queued == ["first", "second"]


def test_start_resets_stale_progress_before_worker_starts(
    coordinator: SyncCoordinator, monkeypatch: pytest.MonkeyPatch
) -> None:
    from types import SimpleNamespace

    messages = []
    workers = []
    coordinator.progress_changed.connect(lambda *entry: messages.append(entry))

    def start(worker) -> None:
        assert messages and messages[-1][0] == 0
        assert "AppData" in messages[-1][1]
        workers.append(worker)

    monkeypatch.setattr(coordinator, "pool", SimpleNamespace(start=start))
    coordinator.enqueue(coordinator.config.tasks[0].id)
    assert len(workers) == 1
    assert coordinator.current_overall_status() == ("active", "Synchronisierung läuft")


def test_pause_and_resume_preserves_queue_and_state(coordinator: SyncCoordinator) -> None:
    task1 = coordinator.config.tasks[0]
    task2 = SyncTask(name="Documents", source="c:/src2", target="c:/dst2")
    coordinator.config.tasks.append(task2)

    # Global pausieren
    coordinator.set_paused(True)
    assert coordinator.config.settings.paused
    assert coordinator.current_overall_status() == ("paused", "Pausiert")

    # Aufgaben in Warteschlange einreihen
    coordinator.enqueue(task1.id)
    coordinator.enqueue(task2.id)

    assert coordinator.queued_task_ids == [task1.id, task2.id]
    assert coordinator.config.settings.pending_queue == [task1.id, task2.id]

    # Fortsetzen
    workers = []
    from types import SimpleNamespace

    coordinator.pool = SimpleNamespace(start=workers.append)
    coordinator.set_paused(False)

    assert not coordinator.config.settings.paused
    assert len(workers) == 1
    assert coordinator.running_task_id == task1.id
    assert coordinator.queued_task_ids == [task2.id]


def test_stop_persists_running_task_and_queue_for_restart(coordinator: SyncCoordinator) -> None:
    task1 = coordinator.config.tasks[0]
    task2 = SyncTask(name="Documents", source="c:/src2", target="c:/dst2")
    coordinator.config.tasks.append(task2)

    coordinator._running_task_id = task1.id
    coordinator._queue.append(task2.id)

    coordinator.stop()

    assert coordinator.config.settings.paused is True
    assert coordinator.config.settings.pending_queue == [task1.id, task2.id]