package huya

import (
	"fmt"
	"math"
	"strconv"
	"strings"
	"time"

	"huya-go/internal/taf"
)

const (
	ActivityWebUA     = "web&1.0&huya"
	ActivityRecordUA  = "webh5&1.0.0&huya"
	ActivityBindUA    = "pc&1.0.0&huya"
	ServantWebActUI   = "webActUI"
	FuncGetUserScore  = "getUserScore"
	FuncPrizeList     = "getActPrizeList"
	FuncPrizeRecords  = "getUserPrizeRecords"
	FuncExchangePrize = "scoreExchangePrize"
)

type ActivityUserID struct {
	UID        int64  `json:"uid"`
	GUID       string `json:"guid,omitempty"`
	Token      string `json:"token,omitempty"`
	HuyaUA     string `json:"huya_ua"`
	Cookie     string `json:"-"`
	TokenType  int32  `json:"token_type"`
	DeviceInfo string `json:"device_info,omitempty"`
}

func NewActivityUserID(uid int64, cookie, ua string) ActivityUserID {
	return ActivityUserID{
		UID:       uid,
		HuyaUA:    ua,
		Cookie:    NormalizeCookie(cookie),
		TokenType: 0,
	}
}

func (u *ActivityUserID) WriteTo(w *taf.Writer) error {
	if err := w.WriteInt64(0, u.UID); err != nil {
		return err
	}
	if err := w.WriteString(1, u.GUID); err != nil {
		return err
	}
	if err := w.WriteString(2, u.Token); err != nil {
		return err
	}
	if err := w.WriteString(3, u.HuyaUA); err != nil {
		return err
	}
	if err := w.WriteString(4, u.Cookie); err != nil {
		return err
	}
	if err := w.WriteInt32(5, int64(u.TokenType)); err != nil {
		return err
	}
	return w.WriteString(6, u.DeviceInfo)
}

func (u *ActivityUserID) ReadFrom(r *taf.Reader) error {
	var err error
	if u.UID, err = r.ReadInt64(0, false, u.UID); err != nil {
		return err
	}
	if u.GUID, err = r.ReadString(1, false, u.GUID); err != nil {
		return err
	}
	if u.Token, err = r.ReadString(2, false, u.Token); err != nil {
		return err
	}
	if u.HuyaUA, err = r.ReadString(3, false, u.HuyaUA); err != nil {
		return err
	}
	if u.Cookie, err = r.ReadString(4, false, u.Cookie); err != nil {
		return err
	}
	if u.TokenType, err = r.ReadInt32(5, false, u.TokenType); err != nil {
		return err
	}
	u.DeviceInfo, err = r.ReadString(6, false, u.DeviceInfo)
	return err
}

type GetUserScoreReq struct {
	User ActivityUserID
	SID  int32
}

func (q *GetUserScoreReq) WriteTo(w *taf.Writer) error {
	if err := w.WriteStruct(0, &q.User); err != nil {
		return err
	}
	return w.WriteInt32(1, int64(q.SID))
}

func (q *GetUserScoreReq) ReadFrom(r *taf.Reader) error {
	_, err := r.ReadStruct(0, false, &q.User)
	if err != nil {
		return err
	}
	q.SID, err = r.ReadInt32(1, false, q.SID)
	return err
}

type GetUserScoreResp struct {
	Status            int32  `json:"status"`
	Msg               string `json:"msg"`
	GainScore         int32  `json:"gain_score"`
	UsedScore         int32  `json:"used_score"`
	NewGainScore      int64  `json:"new_gain_score"`
	NewUsedScore      int64  `json:"new_used_score"`
	Score             int64  `json:"score"`
	IsOpenExchangeTip int32  `json:"is_open_exchange_tip"`
}

func (r *GetUserScoreResp) WriteTo(w *taf.Writer) error { return nil }

func (r *GetUserScoreResp) ReadFrom(rd *taf.Reader) error {
	var err error
	if r.Status, err = rd.ReadInt32(0, false, r.Status); err != nil {
		return err
	}
	if r.Msg, err = rd.ReadString(1, false, r.Msg); err != nil {
		return err
	}
	if r.GainScore, err = rd.ReadInt32(2, false, r.GainScore); err != nil {
		return err
	}
	if r.UsedScore, err = rd.ReadInt32(3, false, r.UsedScore); err != nil {
		return err
	}
	if r.NewGainScore, err = rd.ReadInt64(4, false, r.NewGainScore); err != nil {
		return err
	}
	if r.NewUsedScore, err = rd.ReadInt64(5, false, r.NewUsedScore); err != nil {
		return err
	}
	if r.Score, err = rd.ReadInt64(6, false, r.Score); err != nil {
		return err
	}
	r.IsOpenExchangeTip, err = rd.ReadInt32(7, false, r.IsOpenExchangeTip)
	return err
}

func (r GetUserScoreResp) AvailableScore() int64 {
	if r.NewGainScore != 0 || r.NewUsedScore != 0 {
		score := r.NewGainScore - r.NewUsedScore
		if score < 0 {
			return 0
		}
		return score
	}
	return r.Score
}

type GetActPrizeListReq struct {
	User ActivityUserID
	SID  int32
}

func (q *GetActPrizeListReq) WriteTo(w *taf.Writer) error {
	if err := w.WriteStruct(0, &q.User); err != nil {
		return err
	}
	return w.WriteInt32(1, int64(q.SID))
}

func (q *GetActPrizeListReq) ReadFrom(r *taf.Reader) error {
	_, err := r.ReadStruct(0, false, &q.User)
	if err != nil {
		return err
	}
	q.SID, err = r.ReadInt32(1, false, q.SID)
	return err
}

type PrizeInfo struct {
	ID             int64  `json:"id"`
	SID            int64  `json:"sid"`
	Name           string `json:"name"`
	Score          int64  `json:"score"`
	Type           int32  `json:"type"`
	Image          string `json:"img,omitempty"`
	Sort           int32  `json:"sort"`
	Frequency      int32  `json:"frequency"`
	FrequencyLimit int32  `json:"frequency_limit"`
	CreateTime     int64  `json:"create_time"`
	Num            int64  `json:"num"`
	Status         int32  `json:"status"`
	Percent        string `json:"percent"`
	NewScore       int64  `json:"new_score"`
	// Tags 是奖品归属的类目 id（tag14，多个用逗号分隔）。
	// 2026-10-15 实测：99=限量返场、101=精英专享，与响应 tag4 的字典一一对应。
	Tags      string `json:"tags,omitempty"`
	LeftNum   int64  `json:"left_num"`
	IsShowNum int32  `json:"is_show_num"`
	// 以下为 2026-10-15 抓包新确认的时间字段：限量返场商品是「预告上架」，
	// 页面的「xx:xx:xx 后上架」倒计时就来自 StartTime。
	PublishTime int64  `json:"publish_time,omitempty"` // tag23 商品发布时间
	StartTime   int64  `json:"start_time,omitempty"`   // tag25 上架时间（秒）
	EndTime     int64  `json:"end_time,omitempty"`     // tag26 下架时间（秒）
	DailyStart  string `json:"daily_start,omitempty"`  // tag27 每日可兑时段开始
	DailyEnd    string `json:"daily_end,omitempty"`    // tag28 每日可兑时段结束
}

func (p *PrizeInfo) WriteTo(w *taf.Writer) error { return nil }

func (p *PrizeInfo) ReadFrom(r *taf.Reader) error {
	var err error
	if p.ID, err = r.ReadInt64(0, false, p.ID); err != nil {
		return err
	}
	if p.SID, err = r.ReadInt64(1, false, p.SID); err != nil {
		return err
	}
	if p.Name, err = r.ReadString(2, false, p.Name); err != nil {
		return err
	}
	if p.Score, err = r.ReadInt64(3, false, p.Score); err != nil {
		return err
	}
	if p.Type, err = r.ReadInt32(4, false, p.Type); err != nil {
		return err
	}
	if p.Image, err = r.ReadString(5, false, p.Image); err != nil {
		return err
	}
	if p.Sort, err = r.ReadInt32(6, false, p.Sort); err != nil {
		return err
	}
	if p.Frequency, err = r.ReadInt32(7, false, p.Frequency); err != nil {
		return err
	}
	if p.FrequencyLimit, err = r.ReadInt32(8, false, p.FrequencyLimit); err != nil {
		return err
	}
	if p.CreateTime, err = r.ReadInt64(9, false, p.CreateTime); err != nil {
		return err
	}
	if p.Num, err = r.ReadInt64(10, false, p.Num); err != nil {
		return err
	}
	if p.Status, err = r.ReadInt32(11, false, p.Status); err != nil {
		return err
	}
	if p.Percent, err = r.ReadString(12, false, p.Percent); err != nil {
		return err
	}
	if p.NewScore, err = r.ReadInt64(13, false, p.NewScore); err != nil {
		return err
	}
	if p.Tags, err = r.ReadString(14, false, p.Tags); err != nil {
		return err
	}
	if p.LeftNum, err = r.ReadInt64(15, false, p.LeftNum); err != nil {
		return err
	}
	if p.IsShowNum, err = r.ReadInt32(16, false, p.IsShowNum); err != nil {
		return err
	}
	if p.PublishTime, err = r.ReadInt64(23, false, p.PublishTime); err != nil {
		return err
	}
	if p.StartTime, err = r.ReadInt64(25, false, p.StartTime); err != nil {
		return err
	}
	if p.EndTime, err = r.ReadInt64(26, false, p.EndTime); err != nil {
		return err
	}
	if p.DailyStart, err = r.ReadString(27, false, p.DailyStart); err != nil {
		return err
	}
	p.DailyEnd, err = r.ReadString(28, false, p.DailyEnd)
	return err
}

// CategoryIDs 返回奖品归属的类目 id（tag14，逗号分隔，可能是空串）。
func (p PrizeInfo) CategoryIDs() []int64 {
	text := strings.TrimSpace(p.Tags)
	if text == "" {
		return nil
	}
	parts := strings.Split(text, ",")
	ids := make([]int64, 0, len(parts))
	for _, part := range parts {
		id, err := strconv.ParseInt(strings.TrimSpace(part), 10, 64)
		if err != nil {
			continue
		}
		ids = append(ids, id)
	}
	return ids
}

// InCategory 判断奖品是否属于指定类目 id。
func (p PrizeInfo) InCategory(id int64) bool {
	for _, item := range p.CategoryIDs() {
		if item == id {
			return true
		}
	}
	return false
}

// StartsAt 返回上架时间；未下发时返回零值时间。
func (p PrizeInfo) StartsAt() time.Time {
	if p.StartTime <= 0 {
		return time.Time{}
	}
	return time.Unix(p.StartTime, 0)
}

// EndsAt 返回下架时间；未下发时返回零值时间。
func (p PrizeInfo) EndsAt() time.Time {
	if p.EndTime <= 0 {
		return time.Time{}
	}
	return time.Unix(p.EndTime, 0)
}

// NotYetOnSale 表示商品只是「预告上架」，还没到可兑换时间。
func (p PrizeInfo) NotYetOnSale(now time.Time) bool {
	start := p.StartsAt()
	return !start.IsZero() && now.Before(start)
}

func (p PrizeInfo) Price() int64 {
	if p.NewScore != 0 {
		return p.NewScore
	}
	return p.Score
}

func (p PrizeInfo) EstimatedLeft() int64 {
	left, ok := p.InventoryLeft()
	if ok {
		return left
	}
	return 0
}

func (p PrizeInfo) InventoryLeft() (int64, bool) {
	if p.LeftNum > 0 {
		return p.LeftNum, true
	}
	text := strings.TrimSuffix(strings.TrimSpace(p.Percent), "%")
	if text == "" || p.Num <= 0 {
		return 0, false
	}
	percent, err := strconv.ParseFloat(text, 64)
	if err != nil {
		return 0, false
	}
	return int64(math.Floor(float64(p.Num)*percent/100.0 + 1e-9)), true
}

type PrizeTag struct {
	ID     int64  `json:"id"`
	Name   string `json:"name"`
	Weight int32  `json:"weight"`
}

func (t *PrizeTag) WriteTo(w *taf.Writer) error { return nil }

func (t *PrizeTag) ReadFrom(r *taf.Reader) error {
	var err error
	if t.ID, err = r.ReadInt64(0, false, t.ID); err != nil {
		return err
	}
	if t.Name, err = r.ReadString(1, false, t.Name); err != nil {
		return err
	}
	t.Weight, err = r.ReadInt32(2, false, t.Weight)
	return err
}

type GetActPrizeListResp struct {
	Status   int32       `json:"status"`
	Msg      string      `json:"msg"`
	Prizes   []PrizeInfo `json:"prizes"`
	ModuleID int32       `json:"module_id"`
	Tags     []PrizeTag  `json:"tags"`
}

func (r *GetActPrizeListResp) WriteTo(w *taf.Writer) error { return nil }

func (r *GetActPrizeListResp) ReadFrom(rd *taf.Reader) error {
	var err error
	if r.Status, err = rd.ReadInt32(0, false, r.Status); err != nil {
		return err
	}
	if r.Msg, err = rd.ReadString(1, false, r.Msg); err != nil {
		return err
	}
	items, err := rd.ReadListStruct(2, false, func() taf.Unmarshaler { return &PrizeInfo{} })
	if err != nil {
		return err
	}
	r.Prizes = make([]PrizeInfo, 0, len(items))
	for _, item := range items {
		if prize, ok := item.(*PrizeInfo); ok {
			r.Prizes = append(r.Prizes, *prize)
		}
	}
	if r.ModuleID, err = rd.ReadInt32(3, false, r.ModuleID); err != nil {
		return err
	}
	tags, err := rd.ReadListStruct(4, false, func() taf.Unmarshaler { return &PrizeTag{} })
	if err != nil {
		return err
	}
	r.Tags = make([]PrizeTag, 0, len(tags))
	for _, item := range tags {
		if tag, ok := item.(*PrizeTag); ok {
			r.Tags = append(r.Tags, *tag)
		}
	}
	return nil
}

// CategoryStat 汇总一个类目下的商品数量与库存。
type CategoryStat struct {
	ID    int64  `json:"id"`
	Name  string `json:"name"`
	Count int    `json:"count"`
	Left  int64  `json:"left"`
	Total int64  `json:"total"`
}

// CategoryName 按类目 id 查名字；字典里没有时返回空串。
func (r GetActPrizeListResp) CategoryName(id int64) string {
	for _, tag := range r.Tags {
		if tag.ID == id {
			return tag.Name
		}
	}
	return ""
}

// CategoriesOf 返回某个奖品所属的类目（字典里找不到的 id 用 "类目<id>" 兜底）。
func (r GetActPrizeListResp) CategoriesOf(p PrizeInfo) []PrizeTag {
	ids := p.CategoryIDs()
	items := make([]PrizeTag, 0, len(ids))
	for _, id := range ids {
		if name := r.CategoryName(id); name != "" {
			items = append(items, PrizeTag{ID: id, Name: name})
			continue
		}
		items = append(items, PrizeTag{ID: id, Name: fmt.Sprintf("类目%d", id)})
	}
	return items
}

// CategoryStats 按响应里的类目字典统计商品数、剩余量与总量。
//
// 统计顺序与响应下发的类目顺序一致（页面 tab 顺序），便于日志与界面直接复用。
func (r GetActPrizeListResp) CategoryStats() []CategoryStat {
	stats := make([]CategoryStat, 0, len(r.Tags))
	for _, tag := range r.Tags {
		prizes := make([]PrizeInfo, 0, len(r.Prizes))
		for _, prize := range r.Prizes {
			if prize.InCategory(tag.ID) {
				prizes = append(prizes, prize)
			}
		}
		left, total, _, _ := prizeListInventorySummary(prizes)
		stats = append(stats, CategoryStat{ID: tag.ID, Name: tag.Name, Count: len(prizes), Left: left, Total: total})
	}
	return stats
}

// CategorySummary 生成「限量返场(99)=12项/精英专享(101)=18项」这样的单行摘要，供日志使用。
func (r GetActPrizeListResp) CategorySummary() string {
	stats := r.CategoryStats()
	if len(stats) == 0 {
		return fmt.Sprintf("未下发类目(共%d项)", len(r.Prizes))
	}
	parts := make([]string, 0, len(stats))
	for _, stat := range stats {
		parts = append(parts, fmt.Sprintf("%s(%d)=%d项", stat.Name, stat.ID, stat.Count))
	}
	return strings.Join(parts, "/")
}

// FilterByCategory 按类目过滤商品。
//
// category 支持：空串（不过滤）、类目 id（如 "99"）、类目名（如 "限量返场"，
// 先精确匹配再模糊匹配）。类目字典里没有匹配项时，退回用原始 tag14 文本匹配，
// 这样服务端新增类目但没下发字典时也不会把商品全部过滤掉。
func (r GetActPrizeListResp) FilterByCategory(category string) []PrizeInfo {
	key := strings.TrimSpace(category)
	if key == "" {
		return r.Prizes
	}
	ids := map[int64]bool{}
	if id, err := strconv.ParseInt(key, 10, 64); err == nil {
		ids[id] = true
	} else {
		for _, tag := range r.Tags {
			if strings.EqualFold(strings.TrimSpace(tag.Name), key) {
				ids[tag.ID] = true
			}
		}
		if len(ids) == 0 {
			for _, tag := range r.Tags {
				if strings.Contains(tag.Name, key) {
					ids[tag.ID] = true
				}
			}
		}
	}
	out := make([]PrizeInfo, 0, len(r.Prizes))
	for _, prize := range r.Prizes {
		if len(ids) > 0 {
			matched := false
			for id := range ids {
				if prize.InCategory(id) {
					matched = true
					break
				}
			}
			if matched {
				out = append(out, prize)
			}
			continue
		}
		if strings.Contains(prize.Tags, key) {
			out = append(out, prize)
		}
	}
	return out
}

type GetUserPrizeRecordsReq struct {
	User ActivityUserID
	SID  int32
}

func (q *GetUserPrizeRecordsReq) WriteTo(w *taf.Writer) error {
	if err := w.WriteStruct(0, &q.User); err != nil {
		return err
	}
	return w.WriteInt32(1, int64(q.SID))
}

func (q *GetUserPrizeRecordsReq) ReadFrom(r *taf.Reader) error {
	_, err := r.ReadStruct(0, false, &q.User)
	if err != nil {
		return err
	}
	q.SID, err = r.ReadInt32(1, false, q.SID)
	return err
}

// UserPrizeInfo 对应 getUserPrizeRecords 的一条兑换记录。
//
// 除 tag0~tag10 外，2026-10-13 HAR 实测还有 tag11~tag23：
// 12=orderId、14=奖品图、16=奖品 pid、17=商城 itemId（数量级与 shopMiddleUI
// 的 itemId 一致，语义未在样本中最终确认）、19=prizeItemId、20=扩展 map
// （game/cjm/plat/isRole/liveLinkActId）、21=兑换日期（如 20261013）。
type UserPrizeInfo struct {
	ID              int64             `json:"id"`
	Name            string            `json:"name"`
	Score           int64             `json:"score"`
	CreateTime      int64             `json:"create_time"`
	Status          int32             `json:"status"`
	Type            int32             `json:"type"`
	IsReal          int32             `json:"is_real"`
	NewScore        int64             `json:"new_score"`
	Account         string            `json:"account,omitempty"`
	Code            string            `json:"code,omitempty"`
	CommonPrizeType int32             `json:"common_prize_type"`
	OrderID         string            `json:"order_id,omitempty"`
	Image           string            `json:"img,omitempty"`
	PrizeID         int64             `json:"prize_id,omitempty"`
	ShopItemID      int64             `json:"shop_item_id,omitempty"`
	ItemID          int64             `json:"item_id,omitempty"`
	Ext             map[string]string `json:"ext,omitempty"`
	ExchangeDate    int32             `json:"exchange_date,omitempty"`
}

func (p *UserPrizeInfo) WriteTo(w *taf.Writer) error { return nil }

func (p *UserPrizeInfo) ReadFrom(r *taf.Reader) error {
	var err error
	if p.ID, err = r.ReadInt64(0, false, p.ID); err != nil {
		return err
	}
	if p.Name, err = r.ReadString(1, false, p.Name); err != nil {
		return err
	}
	if p.Score, err = r.ReadInt64(2, false, p.Score); err != nil {
		return err
	}
	if p.CreateTime, err = r.ReadInt64(3, false, p.CreateTime); err != nil {
		return err
	}
	if p.Status, err = r.ReadInt32(4, false, p.Status); err != nil {
		return err
	}
	if p.Type, err = r.ReadInt32(5, false, p.Type); err != nil {
		return err
	}
	if p.IsReal, err = r.ReadInt32(6, false, p.IsReal); err != nil {
		return err
	}
	if p.NewScore, err = r.ReadInt64(7, false, p.NewScore); err != nil {
		return err
	}
	if p.Account, err = r.ReadString(8, false, p.Account); err != nil {
		return err
	}
	if p.Code, err = r.ReadString(9, false, p.Code); err != nil {
		return err
	}
	if p.CommonPrizeType, err = r.ReadInt32(10, false, p.CommonPrizeType); err != nil {
		return err
	}
	if p.OrderID, err = r.ReadString(12, false, p.OrderID); err != nil {
		return err
	}
	if p.Image, err = r.ReadString(14, false, p.Image); err != nil {
		return err
	}
	if p.PrizeID, err = r.ReadInt64(16, false, p.PrizeID); err != nil {
		return err
	}
	if p.ShopItemID, err = r.ReadInt64(17, false, p.ShopItemID); err != nil {
		return err
	}
	if p.ItemID, err = r.ReadInt64(19, false, p.ItemID); err != nil {
		return err
	}
	if p.Ext, err = r.ReadMapStringString(20, false); err != nil {
		return err
	}
	p.ExchangeDate, err = r.ReadInt32(21, false, p.ExchangeDate)
	return err
}

type GetUserPrizeRecordsResp struct {
	Status  int32           `json:"status"`
	Msg     string          `json:"msg"`
	Records []UserPrizeInfo `json:"records"`
}

func (r *GetUserPrizeRecordsResp) WriteTo(w *taf.Writer) error { return nil }

func (r *GetUserPrizeRecordsResp) ReadFrom(rd *taf.Reader) error {
	var err error
	if r.Status, err = rd.ReadInt32(0, false, r.Status); err != nil {
		return err
	}
	if r.Msg, err = rd.ReadString(1, false, r.Msg); err != nil {
		return err
	}
	items, err := rd.ReadListStruct(2, false, func() taf.Unmarshaler { return &UserPrizeInfo{} })
	if err != nil {
		return err
	}
	r.Records = make([]UserPrizeInfo, 0, len(items))
	for _, item := range items {
		if record, ok := item.(*UserPrizeInfo); ok {
			r.Records = append(r.Records, *record)
		}
	}
	return nil
}

type ScoreExchangePrizeReq struct {
	User      ActivityUserID
	SID       int32
	PID       int32
	IP        string
	ClientEnv map[string]string
	Source    string
	IsRole    int32
}

func (q *ScoreExchangePrizeReq) WriteTo(w *taf.Writer) error {
	if err := w.WriteStruct(0, &q.User); err != nil {
		return err
	}
	if err := w.WriteInt32(1, int64(q.SID)); err != nil {
		return err
	}
	if err := w.WriteInt32(2, int64(q.PID)); err != nil {
		return err
	}
	if err := w.WriteString(3, q.IP); err != nil {
		return err
	}
	if err := w.WriteMapStringString(4, q.ClientEnv); err != nil {
		return err
	}
	if err := w.WriteString(5, q.Source); err != nil {
		return err
	}
	if q.IsRole == 0 {
		q.IsRole = 1
	}
	return w.WriteInt32(6, int64(q.IsRole))
}

func (q *ScoreExchangePrizeReq) ReadFrom(r *taf.Reader) error {
	_, err := r.ReadStruct(0, false, &q.User)
	if err != nil {
		return err
	}
	if q.SID, err = r.ReadInt32(1, false, q.SID); err != nil {
		return err
	}
	if q.PID, err = r.ReadInt32(2, false, q.PID); err != nil {
		return err
	}
	if q.IP, err = r.ReadString(3, false, q.IP); err != nil {
		return err
	}
	if q.ClientEnv, err = r.ReadMapStringString(4, false); err != nil {
		return err
	}
	if q.Source, err = r.ReadString(5, false, q.Source); err != nil {
		return err
	}
	q.IsRole, err = r.ReadInt32(6, false, q.IsRole)
	return err
}

type ExchangeInfo struct {
	PID           int32  `json:"pid"`
	ExchangeScore int64  `json:"exchange_score"`
	Desc          string `json:"desc"`
}

func (e *ExchangeInfo) WriteTo(w *taf.Writer) error { return nil }

func (e *ExchangeInfo) ReadFrom(r *taf.Reader) error {
	var err error
	if e.PID, err = r.ReadInt32(1, false, e.PID); err != nil {
		return err
	}
	if e.ExchangeScore, err = r.ReadInt64(2, false, e.ExchangeScore); err != nil {
		return err
	}
	e.Desc, err = r.ReadString(3, false, e.Desc)
	return err
}

type ActPreCondition struct {
	ConditionType   int32             `json:"condition_type"`
	ConditionParams map[string]string `json:"condition_params,omitempty"`
	Tip             string            `json:"tip,omitempty"`
	JumpURL         string            `json:"jump_url,omitempty"`
	ButtonDesc      string            `json:"button_desc,omitempty"`
}

func (c *ActPreCondition) WriteTo(w *taf.Writer) error { return nil }

func (c *ActPreCondition) ReadFrom(r *taf.Reader) error {
	var err error
	if c.ConditionType, err = r.ReadInt32(0, false, c.ConditionType); err != nil {
		return err
	}
	if c.ConditionParams, err = r.ReadMapStringString(1, false); err != nil {
		return err
	}
	if c.Tip, err = r.ReadString(2, false, c.Tip); err != nil {
		return err
	}
	if c.JumpURL, err = r.ReadString(3, false, c.JumpURL); err != nil {
		return err
	}
	c.ButtonDesc, err = r.ReadString(4, false, c.ButtonDesc)
	return err
}

type ScoreExchangePrizeResp struct {
	Status          int32           `json:"status"`
	Msg             string          `json:"msg"`
	OrderID         string          `json:"order_id,omitempty"`
	ExchangeInfo    ExchangeInfo    `json:"exchange_info"`
	ActPreCondition ActPreCondition `json:"act_pre_condition"`
}

func (r *ScoreExchangePrizeResp) WriteTo(w *taf.Writer) error { return nil }

func (r *ScoreExchangePrizeResp) ReadFrom(rd *taf.Reader) error {
	var err error
	if r.Status, err = rd.ReadInt32(0, false, r.Status); err != nil {
		return err
	}
	if r.Msg, err = rd.ReadString(1, false, r.Msg); err != nil {
		return err
	}
	if r.OrderID, err = rd.ReadString(3, false, r.OrderID); err != nil {
		return err
	}
	if _, err = rd.ReadStruct(4, false, &r.ExchangeInfo); err != nil {
		return err
	}
	_, err = rd.ReadStruct(5, false, &r.ActPreCondition)
	return err
}

func (r ScoreExchangePrizeResp) Success() bool {
	return r.Status == 200 && (r.Msg == "" || strings.Contains(r.Msg, "成功"))
}

func prizeListInventorySummary(prizes []PrizeInfo) (left, total int64, leftKnown, totalKnown int) {
	for _, prize := range prizes {
		if prize.Num > 0 {
			total += prize.Num
			totalKnown++
		}
		if itemLeft, ok := prize.InventoryLeft(); ok {
			left += itemLeft
			leftKnown++
		}
	}
	return left, total, leftKnown, totalKnown
}

func exchangeResponseMessage(resp *ScoreExchangePrizeResp) string {
	if resp == nil {
		return ""
	}
	for _, text := range []string{
		resp.Msg,
		resp.ActPreCondition.Tip,
		resp.ActPreCondition.ButtonDesc,
		resp.ExchangeInfo.Desc,
		resp.OrderID,
	} {
		if strings.TrimSpace(text) != "" {
			return strings.TrimSpace(text)
		}
	}
	return ""
}