package controllers

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

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

	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) {
	return identity.Claims(c.Ctx.Request.Header.Get("Authorization"), identity.EndPlatform)
}

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 {
		code := identity.Status(err)
		c.jsonErr(code, code, 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 {
		code := identity.Status(err)
		c.jsonErr(code, code, 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")
}

// ListApps GET /platform/wechatMini/apps 多小程序应用列表（AppSecret 不回显）
func (c *PlatformWechatMiniController) ListApps() {
	if _, err := c.claims(); err != nil {
		code := identity.Status(err)
		c.jsonErr(code, code, err.Error())
		return
	}
	rows, err := wechatmini.ListApps()
	if err != nil {
		c.jsonErr(500, 500, "获取应用列表失败")
		return
	}
	type appDTO struct {
		models.WechatMiniApp
		Configured bool `json:"configured"` // AppSecret 已配置
	}
	list := make([]appDTO, 0, len(rows))
	for _, r := range rows {
		dto := appDTO{WechatMiniApp: r, Configured: r.AppSecret != ""}
		list = append(list, dto)
	}
	c.ok(map[string]interface{}{"list": list}, "获取成功")
}

// SaveApp POST /platform/wechatMini/app/save 新增/更新应用
func (c *PlatformWechatMiniController) SaveApp() {
	if _, err := c.claims(); err != nil {
		code := identity.Status(err)
		c.jsonErr(code, code, err.Error())
		return
	}
	var p struct {
		ID        uint64 `json:"id"`
		Name      string `json:"name"`
		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 strings.TrimSpace(p.Name) == "" {
		c.jsonErr(400, 400, "应用名称不能为空")
		return
	}
	id, err := wechatmini.SaveApp(wechatmini.SaveAppInput{
		ID:        p.ID,
		Name:      p.Name,
		AppID:     p.AppID,
		AppSecret: p.AppSecret,
		Enabled:   p.Enabled == 1,
		AutoBind:  p.AutoBind == 1,
		Remark:    p.Remark,
	})
	if err != nil {
		c.jsonErr(400, 400, err.Error())
		return
	}
	c.ok(map[string]interface{}{"id": id}, "保存成功")
}

// DeleteApp POST /platform/wechatMini/app/delete/:id 软删应用并停用
func (c *PlatformWechatMiniController) DeleteApp() {
	if _, err := c.claims(); err != nil {
		code := identity.Status(err)
		c.jsonErr(code, code, err.Error())
		return
	}
	id, err := strconv.ParseUint(c.Ctx.Input.Param(":id"), 10, 64)
	if err != nil || id == 0 {
		c.jsonErr(400, 400, "无效ID")
		return
	}
	if err := wechatmini.DeleteApp(id); err != nil {
		c.jsonErr(400, 400, err.Error())
		return
	}
	c.ok(nil, "已删除")
}