package controllers

import (
	"encoding/json"
	"fmt"
	"io"
	"strings"

	"server/pkg/jwtutil"
	"server/services/wechatmp"
	"server/services/wechatmini"

	beego "github.com/beego/beego/v2/server/web"
)

// =============================================================
// 平台端「微信小程序」配置：AppID / AppSecret / 启用开关 / 自动绑定
//
// 配置就绪后，uniapp 小程序端的登录页才会展示「微信手机号一键登录」入口
// （GET /auth/wechat/miniapp/config 返回 enabled）。
// AppSecret 掩码回显，提交空串或掩码表示不修改。
// =============================================================

// PlatformWechatMiniController 平台端微信小程序配置
type PlatformWechatMiniController struct {
	beego.Controller
}

func (c *PlatformWechatMiniController) claims() (*jwtutil.Claims, error) {
	auth := c.Ctx.Request.Header.Get("Authorization")
	if auth == "" {
		return nil, fmt.Errorf("未登录")
	}
	parts := strings.SplitN(auth, " ", 2)
	if len(parts) != 2 || parts[0] != "Bearer" {
		return nil, fmt.Errorf("认证信息格式错误")
	}
	claims, err := jwtutil.ParseToken(parts[1])
	if err != nil {
		return nil, fmt.Errorf("无效的token")
	}
	if claims.UserType != "platform" {
		return nil, fmt.Errorf("无权访问")
	}
	return claims, nil
}

func (c *PlatformWechatMiniController) jsonErr(httpStatus, bizCode int, msg string) {
	c.Ctx.Output.SetStatus(httpStatus)
	c.Data["json"] = map[string]interface{}{"code": bizCode, "msg": msg}
	_ = c.ServeJSON()
}

func (c *PlatformWechatMiniController) ok(data interface{}, msg string) {
	if msg == "" {
		msg = "success"
	}
	resp := map[string]interface{}{"code": 200, "msg": msg}
	if data != nil {
		resp["data"] = data
	}
	c.Data["json"] = resp
	_ = c.ServeJSON()
}

// GetConfig GET /platform/wechatMini/config
func (c *PlatformWechatMiniController) GetConfig() {
	if _, err := c.claims(); err != nil {
		c.jsonErr(401, 401, err.Error())
		return
	}
	data := map[string]interface{}{
		"app_id":     "",
		"app_secret": "",
		"enabled":    0,
		"auto_bind":  1,
		"remark":     "",
		"configured": false,
	}
	if cfg, err := wechatmini.LoadConfig(); err == nil {
		data["app_id"] = cfg.AppID
		data["app_secret"] = wechatmp.MaskSecret(cfg.AppSecret)
		data["remark"] = cfg.Remark
		data["configured"] = cfg.AppID != "" && cfg.AppSecret != ""
		if cfg.Enabled {
			data["enabled"] = 1
		}
		if cfg.AutoBind {
			data["auto_bind"] = 1
		} else {
			data["auto_bind"] = 0
		}
	}
	c.ok(data, "获取成功")
}

// SaveConfig POST /platform/wechatMini/config
func (c *PlatformWechatMiniController) SaveConfig() {
	if _, err := c.claims(); err != nil {
		c.jsonErr(401, 401, err.Error())
		return
	}
	var p struct {
		AppID     string `json:"app_id"`
		AppSecret string `json:"app_secret"`
		Enabled   int    `json:"enabled"`
		AutoBind  int    `json:"auto_bind"`
		Remark    string `json:"remark"`
	}
	raw, err := io.ReadAll(c.Ctx.Request.Body)
	if err != nil {
		c.jsonErr(400, 400, "参数错误")
		return
	}
	if err := json.Unmarshal(raw, &p); err != nil {
		c.jsonErr(400, 400, "参数错误")
		return
	}

	if err := wechatmini.SaveConfig(wechatmini.SaveInput{
		AppID:     p.AppID,
		AppSecret: p.AppSecret,
		Enabled:   p.Enabled == 1,
		AutoBind:  p.AutoBind == 1,
		Remark:    p.Remark,
	}); err != nil {
		c.jsonErr(400, 400, err.Error())
		return
	}
	c.ok(nil, "保存成功")
}