import { getToken } from '@/utils/auth';
import errorCode from '@/utils/errorCode';
import { tansParams } from '@/utils/common';
import config from '@/config';
import { getCurrentPage } from '@/utils/public';
import { useInfoStore } from '@/store';

interface UploadConfig {
    url: string;
    filePath: string;
    name?: string;
    header?: Record<string, any>;
    headers?: Record<string, any>;
    formData?: Record<string, any>;
    params?: Record<string, any>;
    timeout?: number;
}

interface UploadResult {
    code: number;
    data?: any;
    msg?: string;
}

const timeout = 10000;
const { baseUrl, clientId, appid } = config;

const upload = (uploadConfig: UploadConfig): Promise<UploadResult> => {
    // 是否需要设置 token
    const isToken = (uploadConfig.headers || {}).isToken === false;
    uploadConfig.header = uploadConfig.header || {};
    if (getToken() && !isToken) {
        uploadConfig.header['Authorization'] = 'Bearer ' + getToken();
    }
    uploadConfig.header['Clientid'] = clientId; // 默认值
    uploadConfig.header['xid'] = appid; // 默认值

    // get请求映射params参数
    if (uploadConfig.params) {
        let url = uploadConfig.url + '?' + tansParams(uploadConfig.params);
        url = url.slice(0, -1);
        uploadConfig.url = url;
    }

    return new Promise((resolve, reject) => {
        uni.uploadFile({
            timeout: uploadConfig.timeout || timeout,
            url: baseUrl + uploadConfig.url,
            filePath: uploadConfig.filePath,
            name: uploadConfig.name || 'file',
            header: uploadConfig.header,
            formData: uploadConfig.formData,
            success: (res) => {
                const result: UploadResult = JSON.parse(res.data);
                const code = result.code || 200;
                const msg = errorCode[code.toString()] || result.msg || errorCode['default'];

                if (code === 200) {
                    resolve(result);
                } else if (code === 401) {
                    uni.hideLoading();
                    // 跳转到登录页面
                    uni.$u.route({
                        type: 'reLaunch',
                        url: '/pages/login/login',
                        params: {
                            redirect: getCurrentPage()?.route || '',
                        },
                    });
                    reject('无效的会话，或者会话已过期，请重新登录。');
                } else if (code === 500) {
                    uni.showToast({
                        title: msg,
                        icon: 'none',
                    });
                    reject('500');
                } else if (code !== 200) {
                    uni.showToast({
                        title: msg,
                        icon: 'none',
                    });
                    reject(code);
                }
            },
            fail: (error) => {
                console.log(error);
                let message = '上传失败';
                if (error.errMsg) {
                    if (error.errMsg.includes('timeout')) {
                        message = '系统接口请求超时';
                    } else if (error.errMsg.includes('fail')) {
                        message = '网络连接异常';
                    }
                }
                uni.showToast({
                    title: message,
                    icon: 'none',
                });
                reject(error);
            },
        });
    });
};

/**
 * 获取文件扩展名
 * @param {string} url - 文件 URL
 * @param {object} [result] - 响应结果对象
 * @param {object} [result.header] - 响应头
 * @returns {string|null} 文件扩展名（不带点），找不到则返回 null
 */
const getFileType = (url: string, result?: { header?: Record<string, any> }): string | null => {
    // 1. 首先尝试从 URL 获取扩展名
    if (url) {
        // 获取 URL 中最后一个斜杠后的文件名
        const filenameFromUrl = url.split('/').pop();
        // 提取扩展名（处理可能存在的查询参数）
        const urlExt = filenameFromUrl?.includes('.') ? filenameFromUrl.split('.').pop()?.split(/[?#]/)[0] : null;

        if (urlExt) return urlExt.toLowerCase() || 'pdf';
    }

    // 2. 如果 URL 中没有扩展名，尝试从 Content-Disposition 头获取
    if (result?.header?.['content-disposition']) {
        try {
            const disposition = result.header['content-disposition'];
            // 匹配 filename="file.ext" 或 filename*=UTF-8''file.ext 格式
            const filenameMatch = disposition.match(/filename\*?=(?:UTF-8''|")?([^;"\n]*)/i);

            if (filenameMatch && filenameMatch[1]) {
                const filename = filenameMatch[1].replace(/['"]/g, '');
                if (filename.includes('.')) {
                    const ext = filename.split('.').pop()?.split(/[?#]/)[0];
                    return ext?.toLowerCase() || 'pdf';
                }
            }
        } catch (e) {
            console.warn('解析 Content-Disposition 失败:', e);
        }
    }

    // 3. 都找不到则返回 pdf 作为默认值
    return 'pdf';
};

// 导出数据函数（按照 handleDownload 规范完善）
export const exportDataFn = (config: { url: string; fileName?: string; params?: Record<string, any>; timeout?: number }, showTitle?: string): Promise<void> =>
    new Promise((resolve, reject) => {
        // 判断是否为完整 URL（以 http://或 https://开头）
        const isFullUrl = config.url.startsWith('http://') || config.url.startsWith('https://');
        // 获取基础 URL 并拼接完整路径
        const baseUrl = isFullUrl ? '' : import.meta.env.VITE_API_BASE_URL || config.url.split('/').slice(0, 3).join('/');
        const downloadUrl = baseUrl + config.url;

        // 获取 token
        const token = useInfoStore().token;

        // 设置请求头
        const header = {
            'Content-Type': 'application/json',
            Authorization: `Bearer ${token}`,
            xid: appid,
            clientId: clientId,
        };

        uni.showLoading({
            title: showTitle || '正在导出数据...',
            mask: true,
        });

        uni.downloadFile({
            url: downloadUrl,
            header: header,
            success: (res) => {
                uni.hideLoading();
                if (res.statusCode === 200) {
                    // 直接打开文件
                    uni.openDocument({
                        filePath: res.tempFilePath,
                        showMenu: true,
                        fileType: getFileType(config.fileName || config.url, res as any) as any,
                        success: () => {
                            resolve();
                        },
                        fail: (err) => {
                            console.log('打开文档失败:', err);
                            uni.showToast({
                                title: '打开文件失败',
                                icon: 'none',
                            });
                            reject(err);
                        },
                    });
                } else {
                    uni.showToast({
                        title: '下载失败',
                        icon: 'none',
                    });
                    reject(res);
                }
            },
            fail: () => {
                uni.hideLoading();
                uni.showToast({
                    title: '下载失败',
                    icon: 'none',
                });
                reject();
            },
        });
    });

export default upload;