/**
 * 消息发送助手 - 统一处理不同类型消息的发送
 */

import { globalTimChatManager } from './tim-chat.js';
import api from './api.js';
import { toast } from './widget.js';
const env = __VITE_ENV__;

function nowTs() {
    return Date.now();
}

async function tryAddServiceRecord(payload) {
    try {
        const res = await api('addServiceRecord', payload);
        if (!res?.success) {
            console.warn('写入服务记录失败:', res?.message || res);
        }
    } catch (e) {
        console.error('写入服务记录异常:', e);
    }
}

function canWriteServiceRecord(options = {}) {
    return Boolean(options?.corpId && options?.userId && options?.customerId);
}

function normalizeServiceRecordBase(options = {}) {
    return {
        corpId: options.corpId,
        executorUserId: String(options.userId || ''),
        creatorUserId: String(options.userId || ''),
        customerId: String(options.customerId || ''),
        customerName: String(options.customerName || ''),
        executeTeamId: String(options.teamId || options.executeTeamId || ''),
        executionTime: nowTs(),
        externalUserId: String(options.externalUserId || options.customerUserId || ''),
    };
}
/**
 * 发送文字消息
 * @param {string} content - 文字内容
 * @returns {Promise<boolean>} 发送是否成功
 */
export async function sendTextMessage(content) {
    if (!content || !content.trim()) {
        toast('文字内容不能为空');
        return false;
    }

    try {
        if (!globalTimChatManager?.isLoggedIn) {
            toast('IM系统未就绪，请稍后重试');
            return false;
        }

        // 直接调用 tim-chat 的 sendTextMessage 方法
        const result = await globalTimChatManager.sendTextMessage(content.trim());

        if (result?.success) {
            return true;
        } else {
            toast(result?.error || '发送文字消息失败');
            return false;
        }
    } catch (error) {
        console.error('发送文字消息异常:', error);
        toast('发送文字消息失败');
        return false;
    }
}

/**
 * 发送图片消息
 * @param {string|File} imageSource - 图片URL（字符串）或文件对象
 * @param {string} imageName - 图片名称（可选）
 * @returns {Promise<boolean>} 发送是否成功
 */
export async function sendImageMessage(imageSource, imageName = '图片') {
    if (!imageSource) {
        toast('图片不能为空');
        return false;
    }

    try {
        if (!globalTimChatManager?.isLoggedIn) {
            toast('IM系统未就绪，请稍后重试');
            return false;
        }

        // 如果是URL字符串，需要先下载转换为文件对象
        let imageFile = imageSource;
        if (typeof imageSource === 'string') {
            imageFile = await downloadImageAsFile(imageSource, imageName);
            if (!imageFile) {
                toast('图片下载失败');
                return false;
            }
        }

        const result = await globalTimChatManager.sendImageMessage(imageFile);

        if (result?.success) {
            return true;
        } else {
            toast(result?.error || '发送图片消息失败');
            return false;
        }
    } catch (error) {
        console.error('发送图片消息异常:', error);
        toast('发送图片消息失败');
        return false;
    }
}

/**
 * 将图片URL下载转换为文件对象（小程序环境）
 * @param {string} imageUrl - 图片URL
 * @param {string} fileName - 文件名
 * @returns {Promise<Object|null>} 文件对象或null
 */
async function downloadImageAsFile(imageUrl, fileName = '图片') {
    return new Promise((resolve) => {
        uni.downloadFile({
            url: imageUrl,
            success: (res) => {
                if (res.statusCode === 200) {
                    // 返回包含 tempFiles 数组的对象，模拟 uni.chooseMedia 的返回格式
                    const fileObj = {
                        tempFiles: [{
                            tempFilePath: res.tempFilePath,
                            path: res.tempFilePath,
                            size: 0,
                            type: 'image'
                        }],
                        // 也保留直接的 tempFilePath 以兼容其他代码
                        tempFilePath: res.tempFilePath
                    };
                    console.log('图片下载成功，文件对象:', fileObj);
                    resolve(fileObj);
                } else {
                    console.error('下载图片失败，状态码:', res.statusCode);
                    resolve(null);
                }
            },
            fail: (error) => {
                console.error('下载图片失败:', error);
                resolve(null);
            }
        });
    });
}

/**
 * 发送宣教文章消息
 * @param {Object} article - 文章对象 { _id, title, cover, url }
 * @param {Object} options - 额外选项 { groupId, patientId, corpId }
 * @returns {Promise<boolean>} 发送是否成功
 */
export async function sendArticleMessage(article, options = {}) {
    if (!article || !article._id) {
        toast('文章信息不完整');
        return false;
    }

    try {
        if (!globalTimChatManager?.isLoggedIn) {
            toast('IM系统未就绪，请稍后重试');
            return false;
        }

        // 构建自定义消息 - 直接传递对象，sendCustomMessage会处理JSON序列化
        const customMessageData = {
            type: 'article',
            title: article.title || '宣教文章',
            articleId: article._id,
            cover: article.cover || '',
            desc: article.subtitle || '点击查看详情',
            url: article.url || '',
            messageType: 'article',
        };

        // 发送自定义消息
        const result = await globalTimChatManager.sendCustomMessage(customMessageData);

        if (result?.success) {
            // 记录文章发送记录（异步，不阻塞）
            if (options.articleId && options.userId && options.customerId && options.corpId) {
                const params = {
                    articleId: options.articleId,
                    userId: options.userId,
                    customerId: options.customerId,
                    corpId: options.corpId,
                };
                if (options.teamId) {
                    params.teamId = options.teamId;
                }
                api('addArticleSendRecord', params).catch((err) => {
                    console.error('记录文章发送失败:', err);
                });
            }

            // 写入服务记录留痕（异步，不阻塞）
            if (canWriteServiceRecord(options)) {
                const base = normalizeServiceRecordBase(options);
                tryAddServiceRecord({
                    ...base,
                    eventType: 'ContentReminder',
                    taskContent: `推送文章：${article.title || '宣教文章'}`,
                    pannedEventSendFile: {
                        type: 'article',
                        articleId: article._id || options.articleId || '',
                        title: article.title || '',
                        url: article.url || '',
                    },
                    pannedEventName: '宣教发送',
                });
            }

            return true;
        } else {
            toast(result?.error || '发送文章消息失败');
            return false;
        }
    } catch (error) {
        console.error('发送文章消息异常:', error);
        toast('发送文章消息失败');
        return false;
    }
}

/**
 * 发送问卷消息
 * @param {Object} survey - 问卷对象 { _id, name, surveryId, url, createBy }
 * @param {Object} options - 额外选项 { userId, customerId, customerName, corpId }
 * @returns {Promise<boolean>} 发送是否成功
 */
export async function sendSurveyMessage(survey, options = {}) {
    if (!survey || !survey._id) {
        toast('问卷信息不完整');
        return false;
    }

    try {
        if (!globalTimChatManager?.isLoggedIn) {
            toast('IM系统未就绪，请稍后重试');
            return false;
        }

        // 生成发送ID
        const sendSurveyId = generateRandomString(10);

        const recordParams = {
            corpId: options.corpId,
            userId: options.userId,
            surveryId: survey._id,
            memberId: options.customerId,
            customer: options.customerName,
            sendSurveyId: sendSurveyId,
        };
        if (options.teamId) {
            recordParams.teamId = options.teamId;
        }

        // 创建问卷记录
        const createRecordRes = await api('createSurveyRecord', recordParams);

        if (!createRecordRes?.success) {
            toast(createRecordRes?.message || '创建问卷记录失败');
            return false;
        }

        const answerId = createRecordRes?.id || '';

        // 生成问卷链接
        const surveyLink = generateSendLink(
            survey,
            answerId,
            options.customerId,
            options.customerName,
            sendSurveyId,
            {
                corpId: options.corpId,
                userId: options.userId
            }
        );

        // 构建自定义消息
        const customMessageData = buildSurveyMessage(survey, surveyLink);

        // 发送自定义消息 - 直接传递消息对象，不再进行额外序列化
        const result = await globalTimChatManager.sendCustomMessage(customMessageData);

        if (result?.success) {
            // 写入服务记录留痕（异步，不阻塞）
            if (canWriteServiceRecord(options)) {
                const base = normalizeServiceRecordBase(options);
                tryAddServiceRecord({
                    ...base,
                    eventType: 'questionnaire',
                    taskContent: `推送问卷：${survey.name || '问卷'}`,
                    pannedEventSendFile: {
                        type: 'questionnaire',
                        surveryId: survey._id || survey.surveryId || '',
                        name: survey.name || '',
                        url: surveyLink || '',
                    },
                    pannedEventName: '问卷调查',
                });
            }
            return true;
        } else {
            toast(result?.error || '发送问卷消息失败');
            return false;
        }
    } catch (error) {
        console.error('发送问卷消息异常:', error);
        toast('发送问卷消息失败');
        return false;
    }
}

/**
 * 生成随机字符串
 * @param {number} length - 字符串长度
 * @returns {string} 随机字符串
 */
function generateRandomString(length) {
    const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
    let result = '';
    for (let i = 0; i < length; i++) {
        result += chars.charAt(Math.floor(Math.random() * chars.length));
    }
    return result;
}

/**
 * 生成问卷发送链接
 * @param {Object} survey - 问卷对象
 * @param {string} answerId - 答卷ID
 * @param {string} customerId - 客户ID
 * @param {string} customerName - 客户名称
 * @param {string} sendSurveyId - 发送问卷ID
 * @param {Object} context - 上下文信息 { corpId, userId, env }
 * @returns {string} 问卷链接
 */
function generateSendLink(survey, answerId, customerId, customerName, sendSurveyId, context = {}) {
    const { corpId, userId } = context;
    const isSystem = survey.createBy === 'system';
    let url = '';
    if (isSystem) {
        // 系统问卷：使用 VITE_SURVEY_URL
        url = `${env?.MP_SURVEY_URL}?corpId=${corpId}&surveryId=${survey.surveryId}&memberId=${customerId}&sendSurveyId=${sendSurveyId}&userId=${userId}`;
    } else {
        // 自定义问卷：使用 VITE_PATIENT_PAGE_BASE_URL
        url = `${env?.MP_PATIENT_PAGE_BASE_URL}pages/survery/fill?corpId=${corpId}&surveryId=${survey._id}&memberId=${customerId}&unionid=unionid&answerId=${answerId}&name=${customerName || ''}`;
    }

    // 如果已有链接，直接使用并拼接额外参数
    if (survey.url && survey.url.trim()) {
        const separator = survey.url.includes('?') ? '&' : '?';
        const params = [];
        if (answerId) params.push(`answerId=${answerId}`);
        if (sendSurveyId) params.push(`sendSurveyId=${sendSurveyId}`);
        if (userId) params.push(`userId=${userId}`);
        if (customerId) params.push(`memberId=${customerId}`);

        if (params.length > 0) {
            url = `${survey.url}${separator}${params.join('&')}`;
        } else {
            url = survey.url;
        }
    }

    return url;
}

/**
 * 构建问卷自定义消息
 * @param {Object} survey - 问卷对象
 * @param {string} surveyLink - 问卷链接
 * @returns {Object} 自定义消息对象
 */
function buildSurveyMessage(survey, surveyLink) {
    return {
        type: 'survey',
        title: survey.name || '填写问卷',
        desc: '请填写问卷',
        url: surveyLink,
        imgUrl:
            'https://796f-youcan-clouddev-1-8ewcqf31dbb2b5-1317294507.tcb.qcloud.la/other/19-%E9%97%AE%E5%8D%B7.png?sign=55a4cd77c418b2c548b65792a2cf6bce&t=1701328694',
        messageType: 'survey',
    };
}

/**
 * 处理回访任务消息发送
 * @param {Object} messages - 消息数组
 * @param {Object} context - 上下文信息 { userId, customerId, customerName, corpId }
 * @returns {Promise<boolean>} 是否全部发送成功
 */
export async function handleFollowUpMessages(messages, context = {}) {
    if (!Array.isArray(messages) || messages.length === 0) {
        toast('没有要发送的消息');
        return false;
    }

    try {
        let allSuccess = true;

        for (const msg of messages) {
            let success = false;

            if (msg.type === 'text') {
                success = await sendTextMessage(msg.content);
            } else if (msg.type === 'image') {
                success = await sendImageMessage(msg.content, msg.name);
            } else if (msg.type === 'article') {
                success = await sendArticleMessage(msg.content, {
                    articleId: msg.content.articleId,
                    userId: context.userId,
                    customerId: context.customerId,
                    corpId: context.corpId,
                });
            } else if (msg.type === 'questionnaire') {
                
                success = await sendSurveyMessage(msg.content, {
                    userId: context.userId,
                    customerId: context.customerId,
                    customerName: context.customerName,
                    corpId: context.corpId
                });
            }

            if (!success) {
                allSuccess = false;
                // 继续发送其他消息，不中断
            }
        }

        return allSuccess;
    } catch (error) {
        console.error('处理回访任务消息异常:', error);
        toast('消息发送过程中出现错误');
        return false;
    }
}