import json
from pathlib import Path
from typing import Optional
from .models import TrackerConfig, TrackedTask
from .utils import get_platform, ensure_dir
from .ui.overlay import OverlayWindow


class Application:
    def __init__(self):
        self.config_path = Path("config.json")
        self.tasks_dir = Path("tasks")
        self.config: TrackerConfig = self._load_or_create_config()
        self.current_task: Optional[TrackedTask] = None
        self.platform = get_platform()

        # Загружаем текущую задачу, если указан ID
        if self.config.current_task_id:
            self.current_task = self._load_task(self.config.current_task_id)

        # Создаём директорию для задач, если нужно
        ensure_dir(self.tasks_dir)

    def _load_or_create_config(self) -> TrackerConfig:
        if self.config_path.exists():
            with open(self.config_path, "r", encoding="utf-8") as f:
                data = json.load(f)
            return TrackerConfig.model_validate(data)
        else:
            config = TrackerConfig()
            self._save_config(config)
            return config

    def _save_config(self, config: TrackerConfig) -> None:
        with open(self.config_path, "w", encoding="utf-8") as f:
            f.write(config.model_dump_json(indent=2))

    def _load_task(self, task_id: str) -> Optional[TrackedTask]:
        task_file = self.tasks_dir / f"{task_id}.json"
        if task_file.exists():
            try:
                with open(task_file, "r", encoding="utf-8") as f:
                    data = json.load(f)
                return TrackedTask.model_validate(data)
            except Exception:
                return None
        return None

    def save_task(self, task: TrackedTask) -> None:
        task_file = self.tasks_dir / f"{task.task_id}.json"
        with open(task_file, "w", encoding="utf-8") as f:
            f.write(task.model_dump_json(indent=2))

    def run(self):
        # Пока просто запускаем UI
        # Позже сюда добавим трекинг в фоне
        overlay = OverlayWindow()
        overlay.run()