export default defineEventHandler(async event => {

    // 获取任务列表的状态进度(普通用户只能看到自己的)
    if (event.node.req.method === 'GET') {
        let {status, model, uid, bot} = getQuery(event)
        let tasks = await useStorage().getKeys().then((keys: any[]) => keys.filter(key => key.startsWith('task:')))
        tasks = await Promise.all(tasks.map(async (key: any) => await useStorage().getItem(key))) // 读取所有任务的数据
        tasks.sort((a: any, b: any) => a.createdAt - b.createdAt)                    // 按照创建时间排序
        if (tasks.length === 0) return []                                            // 如果没有任务，直接返回空数组
        if (status) tasks = tasks.filter((task: any) => task.status === status)      // 筛选出指定状态的任务
        if (model) tasks = tasks.filter((task: any) => task.model === model)         // 筛选出指定model的任务
        if (uid) tasks = tasks.filter((task: any) => task.uid === uid)               // 筛选出指定用户的任务
        if (bot) {
            tasks = tasks.filter((task: any) => task.model === tasks[0].model)  // 筛选出首位model的任务
            tasks.forEach(async (task: any) => {
                task.status = 'processing'
                await useStorage().setItem(`task:${task.tid}`, task)
            })
        }
        return tasks
    }

    // 修改任务状态(仅限bot访问)
    if (event.node.req.method === 'PATCH') {
        let { ids } = await readBody(event)
        // 取出ids对应的任务
        let tasks = await Promise.all(ids.map(async (id: any) => await useStorage().getItem(`task:${id}`)))
        // 修改任务状态
        tasks.forEach(async (task: any) => {
            task.status = 'finished'
            await useStorage().setItem(`task:${task.tid}`, task)
        })
        return tasks
    }

    // 添加任务到队列(生成一个32位随机字符串作为任务ID)
    if (event.node.req.method === 'POST') {
        event.context.body = await readBody(event) // 读取body数据到
        event.context.body.tid = Math.random().toString(36).substring(2, 34)
        event.context.body.uid = 1234567890                 // 默认用户ID
        event.context.body.status = 'waiting'               // 默认当前状态
        event.context.body.createdAt = new Date().getTime() // 设定创建时间
        await useStorage().setItem(`task:${event.context.body.tid}`, event.context.body)
        // 筛选出所有的任务(并打印)
        let tasks = await useStorage().getKeys().then((keys: any[]) => keys.filter(key => key.startsWith('task:')))
        console.log(tasks)
        // 如果无需排队，直接返回结果, 否则返回任务排队状态(预估等待时间)
        return event.context.body
    }

})