const BaseTask = require('./baseTask');
const db = require('../../dbProxy');
const config = require('../config');

/**
 * 自动沟通任务
 * 自动回复HR消息,保持活跃度
 */
class AutoChatTask extends BaseTask {
    constructor() {
        super('auto_chat', {
            defaultInterval: 15,      // 默认15分钟
            defaultPriority: 6,       // 中等优先级
            requiresLogin: true,      // 需要登录
            conflictsWith: []         // 不与其他任务冲突(可以在投递/搜索间隙执行)
        });
    }

    /**
     * 验证任务参数
     */
    validateParams(params) {
        if (!params.platform) {
            return {
                valid: false,
                reason: '缺少必要参数: platform'
            };
        }
        return { valid: true };
    }

    /**
     * 获取任务名称
     */
    getTaskName(params) {
        return `自动沟通 - ${params.name || '默认'}`;
    }

    /**
     * 执行自动沟通任务
     */
    async execute(sn_code, params) {
        console.log(`[自动沟通] 设备 ${sn_code} 开始执行沟通任务`);

        // 1. 获取未读消息列表
        const unreadMessages = await this.getUnreadMessages(sn_code, params.platform);

        if (!unreadMessages || unreadMessages.length === 0) {
            console.log(`[自动沟通] 设备 ${sn_code} 没有未读消息`);
            return {
                success: true,
                repliedCount: 0,
                message: '没有未读消息'
            };
        }

        console.log(`[自动沟通] 设备 ${sn_code} 找到 ${unreadMessages.length} 条未读消息`);

        // 2. 智能回复(这里需要调用实际的AI回复逻辑)
        const replyResult = {
            success: true,
            repliedCount: unreadMessages.length,
            messages: unreadMessages.map(m => ({
                id: m.id,
                from: m.hr_name,
                company: m.company_name
            }))
        };

        return replyResult;
    }

    /**
     * 获取未读消息
     */
    async getUnreadMessages(sn_code, platform) {
        // TODO: 从数据库或缓存获取未读消息
        // 这里返回空数组作为示例
        return [];
    }

    /**
     * 添加沟通任务到队列
     */
    async addToQueue(sn_code, taskQueue, customParams = {}) {
        const now = new Date();
        console.log(`[自动沟通] ${now.toLocaleString()} 尝试为设备 ${sn_code} 添加任务`);

        try {
            // 1. 获取账号信息
            const { pla_account } = db.models;
            const account = await pla_account.findOne({
                where: {
                    sn_code: sn_code,
                    is_delete: 0,
                    is_enabled: 1
                }
            });

            if (!account) {
                console.log(`[自动沟通] 账号 ${sn_code} 不存在或未启用`);
                return { success: false, reason: '账号不存在或未启用' };
            }

            const accountData = account.toJSON();

            // 2. 检查是否开启了自动沟通
            if (!accountData.auto_chat) {
                console.log(`[自动沟通] 设备 ${sn_code} 未开启自动沟通`);
                return { success: false, reason: '未开启自动沟通' };
            }

            // 3. 获取沟通策略配置
            let chatStrategy = {};
            if (accountData.chat_strategy) {
                chatStrategy = typeof accountData.chat_strategy === 'string'
                    ? JSON.parse(accountData.chat_strategy)
                    : accountData.chat_strategy;
            }

            // 4. 检查时间范围
            if (chatStrategy.time_range) {
                const timeCheck = this.checkTimeRange(chatStrategy.time_range);
                if (!timeCheck.allowed) {
                    console.log(`[自动沟通] 设备 ${sn_code} ${timeCheck.reason}`);
                    return { success: false, reason: timeCheck.reason };
                }
            }

            // 5. 执行所有层级的冲突检查
            const conflictCheck = await this.canExecuteTask(sn_code, taskQueue);
            if (!conflictCheck.allowed) {
                console.log(`[自动沟通] 设备 ${sn_code} 冲突检查未通过: ${conflictCheck.reason}`);
                return { success: false, reason: conflictCheck.reason };
            }

            // 6. 检查沟通间隔
            const chat_interval = chatStrategy.chat_interval || this.config.defaultInterval;
            const intervalCheck = await this.checkExecutionInterval(sn_code, chat_interval);

            if (!intervalCheck.allowed) {
                console.log(`[自动沟通] 设备 ${sn_code} ${intervalCheck.reason}`);
                return { success: false, reason: intervalCheck.reason };
            }

            // 7. 构建任务参数
            const taskParams = {
                platform: accountData.platform_type || 'boss',
                name: accountData.name || '默认',
                ...customParams
            };

            // 8. 验证参数
            const validation = this.validateParams(taskParams);
            if (!validation.valid) {
                return { success: false, reason: validation.reason };
            }

            // 9. 添加任务到队列
            await taskQueue.addTask(sn_code, {
                taskType: this.taskType,
                taskName: this.getTaskName(taskParams),
                taskParams: taskParams,
                priority: this.config.defaultPriority
            });

            console.log(`[自动沟通] 已为设备 ${sn_code} 添加沟通任务,间隔: ${chat_interval} 分钟`);

            // 10. 释放任务锁
            this.releaseTaskLock(sn_code);

            return { success: true };

        } catch (error) {
            console.error(`[自动沟通] 添加任务失败:`, error);
            this.releaseTaskLock(sn_code);
            return { success: false, reason: error.message };
        }
    }
}

// 导出单例
module.exports = new AutoChatTask();