package web

import (
	"net/http"
	"strings"
	"videoweb/app/service/authser"
	"videoweb/app/service/rechargeser"
	"videoweb/pub/common/log"
	"videoweb/pub/common/useragent"

	"github.com/gin-gonic/gin"
)

type buyPayBody struct {
	PackageID int64  `json:"packageId"`
	PayMode   string `json:"payMode"`
}

// attachWalletFromGetInfo 登录态拉取 getInfo，刷新 cookie，并写入模板金币余额。
// 返回 true 表示注册账号会话失效，调用方应跳转登录。
func attachWalletFromGetInfo(c *gin.Context, data gin.H) bool {
	if data == nil || useragent.TokenFromRequest(c.Request) == "" {
		return false
	}
	env, user, err := authser.GetInfo(c)
	if err != nil {
		log.Error("wallet getInfo failed", log.E(err))
		return false
	}
	if env != nil && authser.IsSessionExpiredCode(env.Code) {
		retry, needLogin := authser.OnSessionExpired(c, env.Code)
		if needLogin {
			return true
		}
		if retry {
			env, user, err = authser.GetInfo(c)
			if err != nil {
				log.Error("wallet getInfo retry failed", log.E(err))
				return false
			}
		}
	}
	if env == nil || env.Code != 200 || user == nil {
		return false
	}
	authser.SetAuthCookies(c, user)
	data["userId"] = authser.FormatUserID(user.UserID)
	data["recharge"] = user.Recharge
	data["rechargeText"] = authser.FormatRecharge(user.Recharge)
	data["vipType"] = user.VipType
	data["showCardId"] = user.ShowCardID
	data["showCardName"] = strings.TrimSpace(user.ShowCardName)
	active := authser.IsActiveVipUser(user.VipType, user.CurrentVipExpire)
	data["isVip"] = active
	if active {
		data["vipLabel"] = authser.VipDisplayLabel(user.ShowCardName, user.VipType)
		data["vipExpireText"] = authser.FormatVipExpireText(user.CurrentVipExpire)
	} else {
		delete(data, "vipLabel")
		delete(data, "vipExpireText")
	}
	return false
}

// Deposit 金币与会员充值页 SSR：套餐列表 + 金币流水明细。
// Query tab=coin 时默认选中金币充值套餐。
func Deposit(c *gin.Context) {
	// 先补游客会话，保证可拉流水。
	authser.EnsureGuestOnEnter(c)

	preferTab := routeOrQuery(c, "tab", "tab")
	if hasQuery(c, "tab") {
		target := "/deposit"
		if preferTab != "" {
			target += "/" + preferTab
		}
		target += "/"
		if redirectCanonical(c, target) {
			return
		}
	}
	raw := rechargeser.FetchPackageListOrEmpty(c)
	vm := rechargeser.BuildDepositPageVM(raw, preferTab)
	if useragent.TokenFromRequest(c.Request) != "" {
		list, code, err := rechargeser.FetchCoinTransList(c, 1, 20)
		if err != nil {
			retry, needLogin := authser.OnSessionExpired(c, code)
			if needLogin {
				RedirectToLogin(c)
				return
			}
			if retry {
				list, _, err = rechargeser.FetchCoinTransList(c, 1, 20)
			}
			if err != nil {
				log.Error("fetch coin trans list failed", log.E(err))
				list = nil
			}
		}
		vm.AttachTxList(list)
	}
	data := gin.H{
		"title":      "金币与会员",
		"vipList":    vm.VipList,
		"coinList":   vm.CoinList,
		"payMethods": vm.PayMethods,
		"txList":     vm.TxList,
		"preferTab":  preferTab,
	}
	setNoIndex(data, false)
	if attachWalletFromGetInfo(c, data) {
		RedirectToLogin(c)
		return
	}
	HTMLOK(c, "deposit.html", data)
}

// CoinBuy 代理上游 POST /api/app/coin/buy。
func CoinBuy(c *gin.Context) {
	handleBuyPay(c, "coin")
}

// VipPay 代理上游 POST /api/app/vip/pay。
func VipPay(c *gin.Context) {
	handleBuyPay(c, "vip")
}

func handleBuyPay(c *gin.Context, kind string) {
	if useragent.TokenFromRequest(c.Request) == "" {
		c.JSON(http.StatusOK, gin.H{
			"code": 401,
			"msg":  "unauthorized",
			"tip":  "请先登录后再支付",
			"data": nil,
		})
		return
	}

	var body buyPayBody
	if err := c.ShouldBindJSON(&body); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{
			"code": 1001,
			"msg":  "参数错误",
			"tip":  "参数错误",
			"data": nil,
		})
		return
	}

	body.PayMode = rechargeser.NormalizePayMode(body.PayMode)
	if body.PackageID <= 0 || body.PayMode == "" {
		c.JSON(http.StatusOK, gin.H{
			"code": 1001,
			"msg":  "参数错误",
			"tip":  "请选择套餐和支付方式",
			"data": nil,
		})
		return
	}

	req := rechargeser.BuyPayReq{
		PackageID: body.PackageID,
		PayMode:   body.PayMode,
	}

	var (
		env *rechargeser.APIEnvelope[rechargeser.PayOrderResp]
		err error
	)
	switch kind {
	case "coin":
		env, err = rechargeser.BuyCoin(c, req)
	default:
		env, err = rechargeser.VipPay(c, req)
	}
	if err != nil {
		log.Error("buy/pay upstream failed", log.E(err))
		c.JSON(http.StatusOK, gin.H{
			"code": 500,
			"msg":  "pay failed",
			"tip":  "发起支付失败，请稍后重试",
			"data": nil,
		})
		return
	}
	if env != nil && TryJSONSessionRecover(c, env.Code) {
		switch kind {
		case "coin":
			env, err = rechargeser.BuyCoin(c, req)
		default:
			env, err = rechargeser.VipPay(c, req)
		}
		if err != nil {
			log.Error("buy/pay retry failed", log.E(err))
			c.JSON(http.StatusOK, gin.H{
				"code": 500,
				"msg":  "pay failed",
				"tip":  "发起支付失败，请稍后重试",
				"data": nil,
			})
			return
		}
	}
	if env == nil || env.Code != 200 {
		tip := "发起支付失败"
		msg := ""
		code := 500
		if env != nil {
			code = env.Code
			msg = env.Msg
			tip = firstNonEmpty(env.Tip, env.Msg, tip)
		}
		c.JSON(http.StatusOK, gin.H{
			"code": code,
			"msg":  msg,
			"tip":  tip,
			"data": nil,
		})
		return
	}

	payURL := strings.TrimSpace(env.Data.PayURL)
	if payURL == "" {
		c.JSON(http.StatusOK, gin.H{
			"code": 500,
			"msg":  "empty payUrl",
			"tip":  "未获取到支付链接，请稍后重试",
			"data": nil,
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"code": 200,
		"msg":  firstNonEmpty(env.Msg, "success"),
		"tip":  firstNonEmpty(env.Tip, "请完成支付"),
		"data": gin.H{
			"isOpenNewBrowser": env.Data.IsOpenNewBrowser,
			"payUrl":           payURL,
			"payUrlMode":       env.Data.PayURLMode,
			"tradeNo":          env.Data.TradeNo,
		},
	})
}