/**
 * Task Repository - Simplified version
 * Handles data access with caching
 */

import { EventEmitter } from '../utils/event-emitter';
import type { ExtensionLogger } from '../utils/logger';
import type { TaskMasterApi, TaskMasterTask } from '../utils/task-master-api';

// Use the TaskMasterTask type directly to ensure compatibility
export type Task = TaskMasterTask;

export class TaskRepository extends EventEmitter {
	private cache: Task[] | null = null;
	private cacheTimestamp = 0;
	private readonly CACHE_DURATION = 30000; // 30 seconds

	constructor(
		private api: TaskMasterApi,
		private logger: ExtensionLogger
	) {
		super();
	}

	async getAll(): Promise<Task[]> {
		// Return from cache if valid
		if (this.cache && Date.now() - this.cacheTimestamp < this.CACHE_DURATION) {
			return this.cache;
		}

		try {
			const result = await this.api.getTasks({ withSubtasks: true });

			if (result.success && result.data) {
				this.cache = result.data;
				this.cacheTimestamp = Date.now();
				this.emit('tasks:updated', result.data);
				return result.data;
			}

			throw new Error(result.error || 'Failed to fetch tasks');
		} catch (error) {
			this.logger.error('Failed to get tasks', error);
			throw error;
		}
	}

	async getById(taskId: string): Promise<Task | null> {
		// First check cache
		if (this.cache) {
			// Handle both main tasks and subtasks
			for (const task of this.cache) {
				if (task.id === taskId) {
					return task;
				}
				// Check subtasks
				if (task.subtasks) {
					for (const subtask of task.subtasks) {
						if (
							subtask.id === taskId ||
							`${task.id}.${subtask.id}` === taskId
						) {
							return subtask;
						}
					}
				}
			}
		}

		// If not in cache, fetch all and search
		const tasks = await this.getAll();
		for (const task of tasks) {
			if (task.id === taskId) {
				return task;
			}
			// Check subtasks
			if (task.subtasks) {
				for (const subtask of task.subtasks) {
					if (subtask.id === taskId || `${task.id}.${subtask.id}` === taskId) {
						return subtask;
					}
				}
			}
		}

		return null;
	}

	async updateStatus(taskId: string, status: Task['status']): Promise<void> {
		try {
			const result = await this.api.updateTaskStatus(taskId, status);

			if (!result.success) {
				throw new Error(result.error || 'Failed to update status');
			}

			// Invalidate cache
			this.cache = null;

			// Fetch updated tasks
			await this.getAll();
		} catch (error) {
			this.logger.error('Failed to update task status', error);
			throw error;
		}
	}

	async updateContent(taskId: string, updates: any): Promise<void> {
		try {
			const result = await this.api.updateTask(taskId, updates, {
				append: false,
				research: false
			});

			if (!result.success) {
				throw new Error(result.error || 'Failed to update task');
			}

			// Invalidate cache
			this.cache = null;

			// Fetch updated tasks
			await this.getAll();
		} catch (error) {
			this.logger.error('Failed to update task content', error);
			throw error;
		}
	}

	async refresh(): Promise<void> {
		this.cache = null;
		await this.getAll();
	}

	isConnected(): boolean {
		return this.api.getConnectionStatus().isConnected;
	}
}