const API = require('../../../lib/API')
const { BaseStdResponse } = require('../../../BaseStdResponse')
const { TaskScheduler } = require('../../../lib/QK/TaskScheduler')

const scheduler = new TaskScheduler()

function fail(res, err, fallback = '后台抢课管理操作失败') {
    return res.json({
        ...BaseStdResponse.ERR,
        msg: err?.message || fallback
    })
}

class ListClient extends API {
    constructor() {
        super()
        this.setPath('/Admin/QK/Client/List')
        this.setMethod('GET')
    }

    async onRequest(req, res) {
        try {
            const list = await scheduler.listClients()
            return res.json({ ...BaseStdResponse.OK, data: list })
        } catch (err) {
            this.logger.error(`获取抢课客户端列表失败：${err.stack || err}`)
            return fail(res, err, '获取抢课客户端列表失败')
        }
    }
}

class DeleteClient extends API {
    constructor() {
        super()
        this.setPath('/Admin/QK/Client/Delete')
        this.setMethod('DELETE')
    }

    async onRequest(req, res) {
        try {
            const { client_id } = req.body
            if (!client_id) {
                return res.json({ ...BaseStdResponse.MISSING_PARAMETER })
            }
            await scheduler.deleteClient(client_id)
            this.logger.info(`[QK][API][DeleteClient] 已禁用客户端 clientId=${client_id}`)
            return res.json({ ...BaseStdResponse.OK })
        } catch (err) {
            this.logger.error(`禁用抢课客户端失败：${err.stack || err}`)
            return fail(res, err, '禁用抢课客户端失败')
        }
    }
}

class ListTask extends API {
    constructor() {
        super()
        this.setPath('/Admin/QK/Task/List')
        this.setMethod('GET')
    }

    async onRequest(req, res) {
        try {
            const result = await scheduler.listAdminTasks(req.query)
            return res.json({ ...BaseStdResponse.OK, data: result })
        } catch (err) {
            this.logger.error(`获取抢课任务列表失败：${err.stack || err}`)
            return fail(res, err, '获取抢课任务列表失败')
        }
    }
}

class GetTask extends API {
    constructor() {
        super()
        this.setPath('/Admin/QK/Task/Detail')
        this.setMethod('GET')
    }

    async onRequest(req, res) {
        try {
            const { id } = req.query
            if (!id) {
                return res.json({ ...BaseStdResponse.MISSING_PARAMETER })
            }
            const task = await scheduler.getAdminTask(id)
            if (!task) {
                return res.json({ ...BaseStdResponse.ERR, msg: '任务不存在' })
            }
            return res.json({ ...BaseStdResponse.OK, data: task })
        } catch (err) {
            this.logger.error(`获取抢课任务详情失败：${err.stack || err}`)
            return fail(res, err, '获取抢课任务详情失败')
        }
    }
}

class UpdateTask extends API {
    constructor() {
        super()
        this.setPath('/Admin/QK/Task/Update')
        this.setMethod('POST')
    }

    async onRequest(req, res) {
        try {
            const { id } = req.body
            if (!id) {
                return res.json({ ...BaseStdResponse.MISSING_PARAMETER })
            }
            await scheduler.adminUpdateTask(id, req.body)
            this.logger.info(`[QK][API][AdminUpdateTask] 管理员更新任务 taskId=${id}`)
            return res.json({ ...BaseStdResponse.OK })
        } catch (err) {
            this.logger.error(`管理员更新抢课任务失败：${err.stack || err}`)
            return fail(res, err, '更新抢课任务失败')
        }
    }
}

class CancelTask extends API {
    constructor() {
        super()
        this.setPath('/Admin/QK/Task/Cancel')
        this.setMethod('DELETE')
    }

    async onRequest(req, res) {
        try {
            const { id } = req.body
            if (!id) {
                return res.json({ ...BaseStdResponse.MISSING_PARAMETER })
            }
            await scheduler.adminCancelTask(id)
            this.logger.info(`[QK][API][AdminCancelTask] 管理员取消任务 taskId=${id}`)
            return res.json({ ...BaseStdResponse.OK })
        } catch (err) {
            this.logger.error(`管理员取消抢课任务失败：${err.stack || err}`)
            return fail(res, err, '取消抢课任务失败')
        }
    }
}

class RetryTask extends API {
    constructor() {
        super()
        this.setPath('/Admin/QK/Task/Retry')
        this.setMethod('POST')
    }

    async onRequest(req, res) {
        try {
            const { id } = req.body
            if (!id) {
                return res.json({ ...BaseStdResponse.MISSING_PARAMETER })
            }
            await scheduler.adminRetryTask(id)
            this.logger.info(`[QK][API][AdminRetryTask] 管理员重试任务 taskId=${id}`)
            return res.json({ ...BaseStdResponse.OK })
        } catch (err) {
            this.logger.error(`管理员重试抢课任务失败：${err.stack || err}`)
            return fail(res, err, '重试抢课任务失败')
        }
    }
}

class StartTask extends API {
    constructor() {
        super()
        this.setPath('/Admin/QK/Task/Start')
        this.setMethod('POST')
    }

    async onRequest(req, res) {
        try {
            const { id } = req.body
            if (!id) {
                return res.json({ ...BaseStdResponse.MISSING_PARAMETER })
            }
            await scheduler.adminStartTask(id)
            this.logger.info(`[QK][API][AdminStartTask] 管理员开启任务 taskId=${id}`)
            return res.json({ ...BaseStdResponse.OK })
        } catch (err) {
            this.logger.error(`管理员开启抢课任务失败：${err.stack || err}`)
            return fail(res, err, '开启抢课任务失败')
        }
    }
}

class PauseTask extends API {
    constructor() {
        super()
        this.setPath('/Admin/QK/Task/Pause')
        this.setMethod('POST')
    }

    async onRequest(req, res) {
        try {
            const { id } = req.body
            if (!id) {
                return res.json({ ...BaseStdResponse.MISSING_PARAMETER })
            }
            await scheduler.adminPauseTask(id)
            this.logger.info(`[QK][API][AdminPauseTask] 管理员暂停任务 taskId=${id}`)
            return res.json({ ...BaseStdResponse.OK })
        } catch (err) {
            this.logger.error(`管理员暂停抢课任务失败：${err.stack || err}`)
            return fail(res, err, '暂停抢课任务失败')
        }
    }
}

class ListReport extends API {
    constructor() {
        super()
        this.setPath('/Admin/QK/Report/List')
        this.setMethod('GET')
    }

    async onRequest(req, res) {
        try {
            const result = await scheduler.listAdminReports(req.query)
            return res.json({ ...BaseStdResponse.OK, data: result })
        } catch (err) {
            this.logger.error(`获取抢课回报记录失败：${err.stack || err}`)
            return fail(res, err, '获取抢课回报记录失败')
        }
    }
}

class ListBatch extends API {
    constructor() {
        super()
        this.setPath('/Admin/QK/Batch/List')
        this.setMethod('GET')
    }

    async onRequest(req, res) {
        try {
            const list = await scheduler.listBatches()
            return res.json({ ...BaseStdResponse.OK, data: list })
        } catch (err) {
            this.logger.error(`获取抢课批次列表失败：${err.stack || err}`)
            return fail(res, err, '获取抢课批次列表失败')
        }
    }
}

class SaveBatch extends API {
    constructor() {
        super()
        this.setPath('/Admin/QK/Batch/Save')
        this.setMethod('POST')
    }

    async onRequest(req, res) {
        try {
            const { id, name, jx0502zbid, enabled } = req.body
            if (!name || !jx0502zbid) {
                return res.json({ ...BaseStdResponse.MISSING_PARAMETER })
            }
            if (id) {
                await scheduler.updateBatch(id, req.body)
                this.logger.info(`[QK][API][SaveBatch] 更新批次 batchId=${id}`)
                return res.json({ ...BaseStdResponse.OK, data: { id } })
            }
            const batchId = await scheduler.createBatch({ name, jx0502zbid, enabled })
            this.logger.info(`[QK][API][SaveBatch] 创建批次 batchId=${batchId}`)
            return res.json({ ...BaseStdResponse.OK, data: { id: batchId } })
        } catch (err) {
            this.logger.error(`保存抢课批次失败：${err.stack || err}`)
            return fail(res, err, '保存抢课批次失败')
        }
    }
}

module.exports = {
    ListClient,
    DeleteClient,
    ListTask,
    GetTask,
    UpdateTask,
    CancelTask,
    RetryTask,
    StartTask,
    PauseTask,
    ListReport,
    ListBatch,
    SaveBatch
}