import Router from "utils/router.js"
import UserService from "services/userService.js"
import SiteConfigService from "services/SiteConfigService.js"
import ArticleService from "services/ArticleService.js"
import svgCaptcha from "svg-captcha"
import formidable from "formidable"
import fs from "fs/promises"
import path from "path"
import { fileURLToPath } from "url"
import CommonError from "@/utils/error/CommonError"
import { logger } from "@/logger.js"
import { R } from "@/utils/helper"
import imageThumbnail from "image-thumbnail"

class PageController {
    constructor() {
        this.userService = new UserService()
        this.siteConfigService = new SiteConfigService()
        this.siteConfigService = new SiteConfigService()
        this.articleService = new ArticleService()
    }

    // 首页
    async indexGet(ctx) {
        const blogs = await this.articleService.getPublishedArticles()
        return await ctx.render(
            "page/index/index",
            {
                apiList: [
                    {
                        name: "随机图片",
                        desc: "随机图片，点击查看。<br> 右键可复制链接",
                        url: "https://pic.xieyaxin.top/random.php",
                    },
                ],
                blogs: blogs.slice(0, 4),
            },
            { includeSite: true, includeUser: true }
        )
    }

    // 未授权报错页
    async indexNoAuth(ctx) {
        return await ctx.render("page/auth/no-auth", {})
    }

    // 登录页
    async loginGet(ctx) {
        if (ctx.session.user) {
            ctx.status = 200
            ctx.redirect("/?msg=用户已登录")
            return
        }
        return await ctx.render("page/login/index", { site_title: "登录" })
    }

    // 处理登录请求
    async loginPost(ctx) {
        const { username, email, password } = ctx.request.body
        const result = await this.userService.login({ username, email, password })
        ctx.session.user = result.user
        ctx.body = { success: true, message: "登录成功" }
    }

    // 获取验证码
    async captchaGet(ctx) {
        var captcha = svgCaptcha.create({
            size: 4, // 个数
            width: 100, // 宽
            height: 30, // 高
            fontSize: 38, // 字体大小
            color: true, // 字体颜色是否多变
            noise: 4, // 干扰线几条
        })
        // 记录验证码信息（文本+过期时间）
        // 这里设置5分钟后过期
        const expireTime = Date.now() + 5 * 60 * 1000
        ctx.session.captcha = {
            text: captcha.text.toLowerCase(), // 转小写，忽略大小写验证
            expireTime: expireTime,
        }
        ctx.type = "image/svg+xml"
        ctx.body = captcha.data
    }

    // 注册页
    async registerGet(ctx) {
        if (ctx.session.user) {
            return ctx.redirect("/?msg=用户已登录")
        }
        // TODO 多个
        return await ctx.render("page/register/index", { site_title: "注册" })
    }

    // 处理注册请求
    async registerPost(ctx) {
        const { username, password, code } = ctx.request.body

        // 检查Session中是否存在验证码
        if (!ctx.session.captcha) {
            throw new CommonError("验证码不存在，请重新获取")
        }

        const { text, expireTime } = ctx.session.captcha

        // 检查是否过期
        if (Date.now() > expireTime) {
            // 过期后清除Session中的验证码
            delete ctx.session.captcha
            throw new CommonError("验证码已过期，请重新获取")
        }

        if (!code) {
            throw new CommonError("请输入验证码")
        }

        if (code.toLowerCase() !== text) {
            throw new CommonError("验证码错误")
        }

        delete ctx.session.captcha

        await this.userService.register({ username, name: username, password, role: "user" })
        return ctx.redirect("/login")
    }

    // 退出登录
    async logout(ctx) {
        ctx.status = 200
        delete ctx.session.user
        ctx.set("hx-redirect", "/")
    }

    // 获取用户资料
    async profileGet(ctx) {
        if (!ctx.session.user) {
            return ctx.redirect("/login")
        }

        try {
            const user = await this.userService.getUserById(ctx.session.user.id)
            return await ctx.render(
                "page/profile/index",
                {
                    user,
                    site_title: "用户资料",
                },
                { includeSite: true, includeUser: true }
            )
        } catch (error) {
            logger.error(`获取用户资料失败: ${error.message}`)
            ctx.status = 500
            ctx.body = { success: false, message: "获取用户资料失败" }
        }
    }

    // 更新用户资料
    async profileUpdate(ctx) {
        if (!ctx.session.user) {
            ctx.status = 401
            ctx.body = { success: false, message: "未登录" }
            return
        }

        try {
            const { username, email, name, bio, avatar } = ctx.request.body

            // 验证必填字段
            if (!username) {
                ctx.status = 400
                ctx.body = { success: false, message: "用户名不能为空" }
                return
            }

            const updateData = { username, email, name, bio, avatar }

            // 移除空值
            Object.keys(updateData).forEach(key => {
                if (updateData[key] === undefined || updateData[key] === null || updateData[key] === "") {
                    delete updateData[key]
                }
            })

            const updatedUser = await this.userService.updateUser(ctx.session.user.id, updateData)

            // 更新session中的用户信息
            ctx.session.user = { ...ctx.session.user, ...updatedUser }

            ctx.body = {
                success: true,
                message: "资料更新成功",
                user: updatedUser,
            }
        } catch (error) {
            logger.error(`更新用户资料失败: ${error.message}`)
            ctx.status = 500
            ctx.body = { success: false, message: error.message || "更新用户资料失败" }
        }
    }

    // 修改密码
    async changePassword(ctx) {
        if (!ctx.session.user) {
            ctx.status = 401
            ctx.body = { success: false, message: "未登录" }
            return
        }

        try {
            const { oldPassword, newPassword, confirmPassword } = ctx.request.body

            if (!oldPassword || !newPassword || !confirmPassword) {
                ctx.status = 400
                ctx.body = { success: false, message: "请填写所有密码字段" }
                return
            }

            if (newPassword !== confirmPassword) {
                ctx.status = 400
                ctx.body = { success: false, message: "新密码与确认密码不匹配" }
                return
            }

            if (newPassword.length < 6) {
                ctx.status = 400
                ctx.body = { success: false, message: "新密码长度不能少于6位" }
                return
            }

            await this.userService.changePassword(ctx.session.user.id, oldPassword, newPassword)

            ctx.body = {
                success: true,
                message: "密码修改成功",
            }
        } catch (error) {
            logger.error(`修改密码失败: ${error.message}`)
            ctx.status = 500
            ctx.body = { success: false, message: error.message || "修改密码失败" }
        }
    }

    // 支持多文件上传，支持图片、Excel、Word文档类型，可通过配置指定允许的类型和扩展名（只需配置一个数组）
    async upload(ctx) {
        try {
            const __dirname = path.dirname(fileURLToPath(import.meta.url))
            const publicDir = path.resolve(__dirname, "../../../public")
            const uploadsDir = path.resolve(publicDir, "uploads/files")
            // 确保目录存在
            await fs.mkdir(uploadsDir, { recursive: true })

            // 只需配置一个类型-扩展名映射数组
            const defaultTypeList = [
                { mime: "image/jpeg", ext: ".jpg" },
                { mime: "image/png", ext: ".png" },
                { mime: "image/webp", ext: ".webp" },
                { mime: "image/gif", ext: ".gif" },
                { mime: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", ext: ".xlsx" }, // .xlsx
                { mime: "application/vnd.ms-excel", ext: ".xls" }, // .xls
                { mime: "application/msword", ext: ".doc" }, // .doc
                { mime: "application/vnd.openxmlformats-officedocument.wordprocessingml.document", ext: ".docx" }, // .docx
            ]
            let typeList = defaultTypeList

            // 支持通过ctx.query.allowedTypes自定义类型（逗号分隔，自动过滤无效类型）
            if (ctx.query.allowedTypes) {
                const allowed = ctx.query.allowedTypes
                    .split(",")
                    .map(t => t.trim())
                    .filter(Boolean)
                typeList = defaultTypeList.filter(item => allowed.includes(item.mime))
            }

            const allowedTypes = typeList.map(item => item.mime)
            const fallbackExt = ".bin"

            const form = formidable({
                multiples: true, // 支持多文件
                maxFileSize: 10 * 1024 * 1024, // 10MB
                filter: ({ mimetype }) => {
                    return !!mimetype && allowedTypes.includes(mimetype)
                },
                uploadDir: uploadsDir,
                keepExtensions: true,
            })

            const { files } = await new Promise((resolve, reject) => {
                form.parse(ctx.req, (err, fields, files) => {
                    if (err) return reject(err)
                    resolve({ fields, files })
                })
            })

            let fileList = files.file
            if (!fileList) {
                return R.ResponseJSON(R.ERROR, null, "未选择文件或字段名应为 file")
            }
            // 统一为数组
            if (!Array.isArray(fileList)) {
                fileList = [fileList]
            }

            // 处理所有文件
            const urls = []
            for (const picked of fileList) {
                if (!picked) continue
                const oldPath = picked.filepath || picked.path
                // 优先用mimetype判断扩展名
                let ext = (typeList.find(item => item.mime === picked.mimetype) || {}).ext
                if (!ext) {
                    // 回退到原始文件名的扩展名
                    ext = path.extname(picked.originalFilename || picked.newFilename || "") || fallbackExt
                }
                // 文件名
                const filename = `${ctx.session.user.id}-${Date.now()}-${Math.random().toString(36).slice(2, 8)}${ext}`
                const destPath = path.join(uploadsDir, filename)
                // 如果设置了 uploadDir 且 keepExtensions，文件可能已在该目录，仍统一重命名
                if (oldPath && oldPath !== destPath) {
                    await fs.rename(oldPath, destPath)
                }
                // 注意：此处url路径与public下的uploads/files对应
                const url = `/uploads/files/${filename}`
                urls.push(url)
            }

            ctx.body = {
                success: true,
                message: "上传成功",
                urls,
            }
        } catch (error) {
            logger.error(`上传失败: ${error.message}`)
            ctx.status = 500
            ctx.body = { success: false, message: error.message || "上传失败" }
        }
    }

    // 上传头像（multipart/form-data）
    async uploadAvatar(ctx) {
        try {
            const __dirname = path.dirname(fileURLToPath(import.meta.url))
            const publicDir = path.resolve(__dirname, "../../../public")
            const avatarsDir = path.resolve(publicDir, "uploads/avatars")

            // 确保目录存在
            await fs.mkdir(avatarsDir, { recursive: true })

            const form = formidable({
                multiples: false,
                maxFileSize: 5 * 1024 * 1024, // 5MB
                filter: ({ mimetype }) => {
                    return !!mimetype && /^(image\/jpeg|image\/png|image\/webp|image\/gif)$/.test(mimetype)
                },
                uploadDir: avatarsDir,
                keepExtensions: true,
            })

            const { files } = await new Promise((resolve, reject) => {
                form.parse(ctx.req, (err, fields, files) => {
                    if (err) return reject(err)
                    resolve({ fields, files })
                })
            })

            const file = files.avatar || files.file || files.image
            const picked = Array.isArray(file) ? file[0] : file
            if (!picked) {
                ctx.status = 400
                ctx.body = { success: false, message: "未选择文件或字段名应为 avatar" }
                return
            }

            // formidable v2 的文件对象
            const oldPath = picked.filepath || picked.path
            const result = { url: "", thumb: "" }
            const ext = path.extname(picked.originalFilename || picked.newFilename || "") || path.extname(oldPath || "") || ".jpg"
            const safeExt = [".jpg", ".jpeg", ".png", ".webp", ".gif"].includes(ext.toLowerCase()) ? ext : ".jpg"
            const filename = `${ctx.session.user.id}-${Date.now()}/raw${safeExt}`
            const destPath = path.join(avatarsDir, filename)

            // 如果设置了 uploadDir 且 keepExtensions，文件可能已在该目录，仍统一重命名
            if (oldPath && oldPath !== destPath) {
                await fs.mkdir(path.parse(destPath).dir, { recursive: true })
                await fs.rename(oldPath, destPath)
                try {
                    const thumbnail = await imageThumbnail(destPath)
                    fs.writeFile(destPath.replace(/raw\./, "thumb."), thumbnail)
                } catch (err) {
                    console.error(err)
                }
            }

            const url = `/uploads/avatars/${filename}`
            result.url = url
            result.thumb = url.replace(/raw\./, "thumb.")
            const updatedUser = await this.userService.updateUser(ctx.session.user.id, { avatar: url })
            ctx.session.user = { ...ctx.session.user, ...updatedUser }

            ctx.body = {
                success: true,
                message: "头像上传成功",
                url,
                thumb: result.thumb,
                user: updatedUser,
            }
        } catch (error) {
            logger.error(`上传头像失败: ${error.message}`)
            ctx.status = 500
            ctx.body = { success: false, message: error.message || "上传头像失败" }
        }
    }

    // 处理联系表单提交
    async contactPost(ctx) {
        const { name, email, subject, message } = ctx.request.body

        // 简单的表单验证
        if (!name || !email || !subject || !message) {
            ctx.status = 400
            ctx.body = { success: false, message: "请填写所有必填字段" }
            return
        }

        // 这里可以添加邮件发送逻辑或数据库存储逻辑
        // 目前只是简单的成功响应
        logger.info(`收到联系表单: ${name} (${email}) - ${subject}: ${message}`)

        ctx.body = {
            success: true,
            message: "感谢您的留言，我们会尽快回复您！",
        }
    }

    // 渲染页面
    pageGet(name, data) {
        return async ctx => {
            return await ctx.render(
                name,
                {
                    ...(data || {}),
                },
                { includeSite: true, includeUser: true }
            )
        }
    }

    static createRoutes() {
        const controller = new PageController()
        const router = new Router({ auth: "try" })
        // 首页
        router.get("/", controller.indexGet.bind(controller), { auth: false })
        // 未授权报错页
        router.get("/no-auth", controller.indexNoAuth.bind(controller), { auth: false })

        // router.get("/article/:id", controller.pageGet("page/articles/index"), { auth: false })
        // router.get("/articles", controller.pageGet("page/articles/index"), { auth: false })

        router.get("/about", controller.pageGet("page/about/index"), { auth: false })
        router.get("/terms", controller.pageGet("page/extra/terms"), { auth: false })
        router.get("/privacy", controller.pageGet("page/extra/privacy"), { auth: false })
        router.get("/faq", controller.pageGet("page/extra/faq"), { auth: false })
        router.get("/feedback", controller.pageGet("page/extra/feedback"), { auth: false })
        router.get("/profile", controller.profileGet.bind(controller), { auth: true })
        router.post("/profile/update", controller.profileUpdate.bind(controller), { auth: true })
        router.post("/profile/change-password", controller.changePassword.bind(controller), { auth: true })
        router.post("/profile/upload-avatar", controller.uploadAvatar.bind(controller), { auth: true })
        router.get("/notice", controller.pageGet("page/notice/index"), { auth: true })
        router.get("/help", controller.pageGet("page/extra/help"), { auth: false })
        router.get("/contact", controller.pageGet("page/extra/contact"), { auth: false })
        router.post("/contact", controller.contactPost.bind(controller), { auth: false })
        router.get("/login", controller.loginGet.bind(controller), { auth: "try" })
        router.post("/login", controller.loginPost.bind(controller), { auth: false })
        router.get("/captcha", controller.captchaGet.bind(controller), { auth: false })
        router.get("/register", controller.registerGet.bind(controller), { auth: "try" })
        router.post("/register", controller.registerPost.bind(controller), { auth: false })
        router.post("/logout", controller.logout.bind(controller), { auth: true })
        return router
    }
}

export default PageController