package roomadmin

import (
	"context"
	"fmt"
	"strconv"
	"strings"

	"hyapp-admin-server/internal/integration/robotclient"
	"hyapp-admin-server/internal/integration/roomclient"
	"hyapp-admin-server/internal/modules/shared"
)

const defaultRoomRobotScene = "voice"

type RobotRoom struct {
	AppCode          string        `json:"appCode"`
	RoomID           string        `json:"roomId"`
	RoomShortID      string        `json:"roomShortId"`
	Title            string        `json:"title"`
	CoverURL         string        `json:"coverUrl"`
	VisibleRegionID  int64         `json:"visibleRegionId"`
	RegionName       string        `json:"regionName"`
	Status           string        `json:"status"`
	OwnerRobotUserID string        `json:"ownerRobotUserId"`
	Owner            RoomOwner     `json:"owner"`
	RobotUserIDs     []string      `json:"robotUserIds"`
	Robots           []RoomOwner   `json:"robots"`
	GiftRule         RobotGiftRule `json:"giftRule"`
	CreatedByAdminID uint64        `json:"createdByAdminId"`
	CreatedAtMS      int64         `json:"createdAtMs"`
	UpdatedAtMS      int64         `json:"updatedAtMs"`
}

type RobotGiftRule struct {
	GiftIDs              []string `json:"giftIds"`
	LuckyGiftIDs         []string `json:"luckyGiftIds"`
	NormalGiftIntervalMS int64    `json:"normalGiftIntervalMs"`
	LuckyComboMin        int64    `json:"luckyComboMin"`
	LuckyComboMax        int64    `json:"luckyComboMax"`
	LuckyPauseMinMS      int64    `json:"luckyPauseMinMs"`
	LuckyPauseMaxMS      int64    `json:"luckyPauseMaxMs"`
}

type AvailableRoomRobot struct {
	UserID       string    `json:"userId"`
	Status       string    `json:"status"`
	RoomScene    string    `json:"roomScene"`
	LastUsedAtMS int64     `json:"lastUsedAtMs"`
	UsedCount    int64     `json:"usedCount"`
	User         RoomOwner `json:"user"`
}

func (s *Service) ListRobotRooms(ctx context.Context, query robotRoomListQuery) ([]RobotRoom, int64, error) {
	if s.roomClient == nil {
		return nil, 0, fmt.Errorf("room service client is not configured")
	}
	if query.Page <= 0 {
		query.Page = 1
	}
	if query.PageSize <= 0 || query.PageSize > 100 {
		query.PageSize = 50
	}
	result, err := s.roomClient.ListRobotRooms(ctx, roomclient.ListRobotRoomsRequest{
		Page:     query.Page,
		PageSize: query.PageSize,
		Status:   normalizeRobotRoomListStatus(query.Status),
	})
	if err != nil {
		return nil, 0, err
	}
	items := robotRoomsFromClient(result.Rooms)
	if err := s.fillRobotRoomDetails(ctx, items); err != nil {
		return nil, 0, err
	}
	return items, result.Total, nil
}

func normalizeRobotRoomListStatus(status string) string {
	switch strings.TrimSpace(status) {
	case "active", "stopped":
		return strings.TrimSpace(status)
	default:
		return ""
	}
}

func (s *Service) ListAvailableRoomRobots(ctx context.Context) ([]AvailableRoomRobot, error) {
	if s.robotClient == nil || s.roomClient == nil {
		return nil, fmt.Errorf("robot or room service client is not configured")
	}
	result, err := s.robotClient.ListRoomRobots(ctx, robotclient.ListRoomRobotsRequest{
		RoomScene: defaultRoomRobotScene,
		Status:    "active",
		PageSize:  200,
	})
	if err != nil {
		return nil, err
	}
	userIDs := make([]int64, 0, len(result.Robots))
	for _, item := range result.Robots {
		if item.UserID > 0 {
			userIDs = append(userIDs, item.UserID)
		}
	}
	available, err := s.roomClient.FilterAvailableRoomRobots(ctx, userIDs)
	if err != nil {
		return nil, err
	}
	allowed := make(map[int64]bool, len(available.AvailableUserIDs))
	for _, userID := range available.AvailableUserIDs {
		allowed[userID] = true
	}
	owners, err := s.queryRoomOwners(ctx, available.AvailableUserIDs)
	if err != nil {
		return nil, err
	}
	items := make([]AvailableRoomRobot, 0, len(available.AvailableUserIDs))
	for _, robot := range result.Robots {
		if !allowed[robot.UserID] {
			continue
		}
		items = append(items, AvailableRoomRobot{
			UserID:       strconv.FormatInt(robot.UserID, 10),
			Status:       robot.Status,
			RoomScene:    robot.RoomScene,
			LastUsedAtMS: robot.LastUsedAtMS,
			UsedCount:    robot.UsedCount,
			User:         owners[robot.UserID],
		})
	}
	return items, nil
}

func (s *Service) CreateRobotRoom(ctx context.Context, req createRobotRoomRequest, actor shared.Actor) (RobotRoom, error) {
	if s.roomClient == nil {
		return RobotRoom{}, fmt.Errorf("room service client is not configured")
	}
	normalized, err := normalizeCreateRobotRoomRequest(req)
	if err != nil {
		return RobotRoom{}, err
	}
	req = normalized
	if err := s.applyOwnerProfileToRobotRoomRequest(ctx, &req); err != nil {
		return RobotRoom{}, err
	}
	created, err := s.roomClient.CreateRobotRoom(ctx, roomclient.CreateRobotRoomRequest{
		OwnerRobotUserID:      req.OwnerRobotUserID,
		CandidateRobotUserIDs: req.CandidateRobotUserIDs,
		MinRobotCount:         req.MinRobotCount,
		MaxRobotCount:         req.MaxRobotCount,
		RoomName:              req.RoomName,
		RoomAvatar:            req.RoomAvatar,
		VisibleRegionID:       req.VisibleRegionID,
		GiftRule: roomclient.RobotRoomGiftRule{
			GiftIDs:              req.GiftIDs,
			LuckyGiftIDs:         req.LuckyGiftIDs,
			NormalGiftIntervalMS: req.NormalGiftIntervalMS,
			LuckyComboMin:        req.LuckyComboMin,
			LuckyComboMax:        req.LuckyComboMax,
			LuckyPauseMinMS:      req.LuckyPauseMinMS,
			LuckyPauseMaxMS:      req.LuckyPauseMaxMS,
		},
		AdminID: uint64(actor.UserID),
	})
	if err != nil {
		return RobotRoom{}, mapRoomClientError(err)
	}
	items := []RobotRoom{robotRoomFromClient(created)}
	if err := s.fillRobotRoomDetails(ctx, items); err != nil {
		return RobotRoom{}, err
	}
	return items[0], nil
}

func (s *Service) applyOwnerProfileToRobotRoomRequest(ctx context.Context, req *createRobotRoomRequest) error {
	if s.userDB == nil {
		return fmt.Errorf("user database is not configured")
	}
	owners, err := s.queryRoomOwners(ctx, []int64{req.OwnerRobotUserID})
	if err != nil {
		return err
	}
	owner, ok := owners[req.OwnerRobotUserID]
	if !ok {
		return fmt.Errorf("%w: 房主机器人资料不存在", ErrInvalidArgument)
	}
	roomName, roomAvatar, err := robotRoomProfileFromOwner(owner)
	if err != nil {
		return err
	}
	// 机器人房间对外展示必须跟随房主机器人资料，避免后台表单或脚本传入的自定义值让房间卡片和房主身份不一致。
	req.RoomName = roomName
	req.RoomAvatar = roomAvatar
	return nil
}

func robotRoomProfileFromOwner(owner RoomOwner) (string, string, error) {
	name := strings.TrimSpace(owner.Username)
	avatar := strings.TrimSpace(owner.Avatar)
	if name == "" {
		return "", "", fmt.Errorf("%w: 房主机器人名称不能为空", ErrInvalidArgument)
	}
	if avatar == "" {
		return "", "", fmt.Errorf("%w: 房主机器人头像不能为空", ErrInvalidArgument)
	}
	return name, avatar, nil
}

func (s *Service) SetRobotRoomStatus(ctx context.Context, roomID string, status string, actor shared.Actor) (RobotRoom, error) {
	if s.roomClient == nil {
		return RobotRoom{}, fmt.Errorf("room service client is not configured")
	}
	roomID = strings.TrimSpace(roomID)
	status = strings.TrimSpace(status)
	if roomID == "" || (status != "active" && status != "stopped") {
		return RobotRoom{}, fmt.Errorf("%w: 机器人房间状态参数不正确", ErrInvalidArgument)
	}
	item, err := s.roomClient.SetRobotRoomStatus(ctx, roomclient.SetRobotRoomStatusRequest{
		RoomID:  roomID,
		Status:  status,
		AdminID: uint64(actor.UserID),
	})
	if err != nil {
		return RobotRoom{}, mapRoomClientError(err)
	}
	items := []RobotRoom{robotRoomFromClient(item)}
	if err := s.fillRobotRoomDetails(ctx, items); err != nil {
		return RobotRoom{}, err
	}
	return items[0], nil
}

func normalizeCreateRobotRoomRequest(req createRobotRoomRequest) (createRobotRoomRequest, error) {
	if req.OwnerRobotUserID <= 0 {
		return req, fmt.Errorf("%w: 请选择房主机器人", ErrInvalidArgument)
	}
	if req.MinRobotCount <= 0 || req.MaxRobotCount < req.MinRobotCount {
		return req, fmt.Errorf("%w: 机器人数量范围不正确", ErrInvalidArgument)
	}
	if len(req.CandidateRobotUserIDs) == 0 {
		return req, fmt.Errorf("%w: 请选择候选机器人", ErrInvalidArgument)
	}
	if len(req.GiftIDs) == 0 {
		return req, fmt.Errorf("%w: 请选择普通礼物合集", ErrInvalidArgument)
	}
	if len(req.LuckyGiftIDs) == 0 {
		return req, fmt.Errorf("%w: 请选择幸运礼物合集", ErrInvalidArgument)
	}
	if req.NormalGiftIntervalMS <= 0 {
		return req, fmt.Errorf("%w: 普通礼物频次不正确", ErrInvalidArgument)
	}
	if req.LuckyComboMin <= 0 || req.LuckyComboMax < req.LuckyComboMin {
		return req, fmt.Errorf("%w: 幸运礼物连击范围不正确", ErrInvalidArgument)
	}
	if req.LuckyPauseMinMS <= 0 || req.LuckyPauseMaxMS < req.LuckyPauseMinMS {
		return req, fmt.Errorf("%w: 幸运礼物间隔范围不正确", ErrInvalidArgument)
	}
	return req, nil
}

func robotRoomsFromClient(items []roomclient.RobotRoom) []RobotRoom {
	out := make([]RobotRoom, 0, len(items))
	for _, item := range items {
		out = append(out, robotRoomFromClient(item))
	}
	return out
}

func robotRoomFromClient(item roomclient.RobotRoom) RobotRoom {
	robotUserIDs := make([]string, 0, len(item.RobotUserIDs))
	for _, userID := range item.RobotUserIDs {
		robotUserIDs = append(robotUserIDs, strconv.FormatInt(userID, 10))
	}
	return RobotRoom{
		AppCode:          item.AppCode,
		RoomID:           item.RoomID,
		RoomShortID:      item.RoomShortID,
		Title:            item.Title,
		CoverURL:         item.CoverURL,
		VisibleRegionID:  item.VisibleRegionID,
		Status:           item.Status,
		OwnerRobotUserID: strconv.FormatInt(item.OwnerRobotUserID, 10),
		RobotUserIDs:     robotUserIDs,
		GiftRule: RobotGiftRule{
			GiftIDs:              item.GiftRule.GiftIDs,
			LuckyGiftIDs:         item.GiftRule.LuckyGiftIDs,
			NormalGiftIntervalMS: item.GiftRule.NormalGiftIntervalMS,
			LuckyComboMin:        item.GiftRule.LuckyComboMin,
			LuckyComboMax:        item.GiftRule.LuckyComboMax,
			LuckyPauseMinMS:      item.GiftRule.LuckyPauseMinMS,
			LuckyPauseMaxMS:      item.GiftRule.LuckyPauseMaxMS,
		},
		CreatedByAdminID: item.CreatedByAdminID,
		CreatedAtMS:      item.CreatedAtMS,
		UpdatedAtMS:      item.UpdatedAtMS,
	}
}

func (s *Service) fillRobotRoomDetails(ctx context.Context, items []RobotRoom) error {
	if s.userDB == nil || len(items) == 0 {
		return nil
	}
	userIDs := make([]int64, 0)
	regionIDs := make([]int64, 0)
	for _, item := range items {
		if ownerID, err := strconv.ParseInt(item.OwnerRobotUserID, 10, 64); err == nil && ownerID > 0 {
			userIDs = append(userIDs, ownerID)
		}
		for _, rawID := range item.RobotUserIDs {
			if userID, err := strconv.ParseInt(rawID, 10, 64); err == nil && userID > 0 {
				userIDs = append(userIDs, userID)
			}
		}
		if item.VisibleRegionID > 0 {
			regionIDs = append(regionIDs, item.VisibleRegionID)
		}
	}
	owners, err := s.queryRoomOwners(ctx, uniqueInt64s(userIDs))
	if err != nil {
		return err
	}
	regions, err := s.queryRegionNames(ctx, uniqueInt64s(regionIDs))
	if err != nil {
		return err
	}
	for index := range items {
		if ownerID, err := strconv.ParseInt(items[index].OwnerRobotUserID, 10, 64); err == nil {
			items[index].Owner = owners[ownerID]
		}
		for _, rawID := range items[index].RobotUserIDs {
			if userID, err := strconv.ParseInt(rawID, 10, 64); err == nil {
				items[index].Robots = append(items[index].Robots, owners[userID])
			}
		}
		items[index].RegionName = regions[items[index].VisibleRegionID]
	}
	return nil
}