package baishun

import (
	"chatapp3-golang/internal/model"
	"context"
	"fmt"
	"net/http"
	"strconv"
	"strings"

	"gorm.io/gorm"
)

// ListShortcutGames 返回房间里的快捷游戏列表，数量上限为 5 个。
func (s *BaishunService) ListShortcutGames(ctx context.Context, user AuthUser, roomID string) ([]RoomGameListItem, error) {
	items, err := s.listRoomGames(ctx, user.SysOrigin, roomID, "")
	if err != nil {
		return nil, err
	}
	if len(items) > 5 {
		items = items[:5]
	}
	return items, nil
}

// ListRoomGames 返回房间可启动的完整游戏列表。
func (s *BaishunService) ListRoomGames(ctx context.Context, user AuthUser, roomID string, category string) (*RoomGameListResponse, error) {
	items, err := s.listRoomGames(ctx, user.SysOrigin, roomID, category)
	if err != nil {
		return nil, err
	}
	return &RoomGameListResponse{Items: items}, nil
}

// GetRoomState 返回房间当前的游戏挂载状态。
func (s *BaishunService) GetRoomState(ctx context.Context, user AuthUser, roomID string) (*BaishunRoomStateResponse, error) {
	var state model.BaishunRoomState
	if err := s.repo.DB.WithContext(ctx).
		Where("sys_origin = ? AND room_id = ?", user.SysOrigin, roomID).
		First(&state).Error; err != nil {
		if err == gorm.ErrRecordNotFound {
			return &BaishunRoomStateResponse{RoomID: roomID, State: baishunRoomStateIdle}, nil
		}
		return nil, err
	}
	resp := &BaishunRoomStateResponse{
		RoomID:           roomID,
		State:            defaultIfBlank(state.State, baishunRoomStateIdle),
		GameSessionID:    state.GameSessionID,
		CurrentGameID:    state.CurrentGameID,
		CurrentGameName:  state.CurrentGameName,
		CurrentGameCover: state.CurrentGameCover,
		HostUserID:       state.HostUserID,
	}
	if state.CurrentVendorGameID != nil {
		resp.CurrentVendorGameID = *state.CurrentVendorGameID
	}
	return resp, nil
}

// listRoomGames 联表读取房间可启动游戏，并按展示规则排序。
func (s *BaishunService) listRoomGames(ctx context.Context, sysOrigin, roomID, category string) ([]RoomGameListItem, error) {
	sysOrigin = normalizeAdminSysOrigin(sysOrigin)
	profile, err := s.activeProfile(ctx, sysOrigin)
	if err != nil {
		return nil, err
	}
	var rows []gameListRow
	query := s.repo.DB.WithContext(ctx).
		Table("sys_game_list_config AS cfg").
		Select(`
			cfg.id AS config_id,
			cfg.sys_origin AS sys_origin,
			ext.profile AS profile,
			cfg.game_id AS internal_game_id,
			cfg.name AS name,
			cfg.category AS category,
			cfg.cover AS cover,
			cfg.sort AS sort,
			cfg.full_screen AS full_screen,
			cfg.game_mode AS game_mode_raw,
			ext.vendor_type AS vendor_type,
			ext.vendor_game_id AS vendor_game_id,
			ext.launch_mode AS launch_mode,
			ext.package_version AS ext_package_version,
			ext.preview_url AS ext_preview_url,
			ext.package_url AS package_url,
				ext.orientation AS ext_orientation,
				ext.safe_height AS ext_safe_height,
				ext.currency_icon AS currency_icon,
				ext.gsp AS ext_gsp,
				ext.extra_json AS ext_extra_json,
				cat.name AS catalog_name,
				cat.cover AS catalog_cover,
			cat.preview_url AS catalog_preview_url,
			cat.download_url AS catalog_download_url,
			cat.package_version AS catalog_package_version,
			cat.orientation AS catalog_orientation,
			cat.safe_height AS catalog_safe_height,
			cat.status AS catalog_status
		`).
		Joins("JOIN sys_game_list_vendor_ext ext ON ext.game_list_config_id = cfg.id AND ext.enabled = 1 AND ext.profile = ?", profile).
		Joins("LEFT JOIN baishun_game_catalog cat ON cat.sys_origin = cfg.sys_origin AND cat.profile = ext.profile AND CAST(cat.vendor_game_id AS CHAR) = ext.vendor_game_id").
		Where("cfg.sys_origin = ? AND cfg.is_showcase = 1 AND ext.vendor_type = ?", sysOrigin, baishunVendorType)
	if strings.TrimSpace(category) != "" && !strings.EqualFold(strings.TrimSpace(category), "CHAT_ROOM") {
		query = query.Where("cfg.category = ?", category)
	}
	if err := query.Order("cfg.sort DESC").Scan(&rows).Error; err != nil {
		return nil, err
	}

	items := make([]RoomGameListItem, 0, len(rows))
	for _, row := range rows {
		items = append(items, row.toListItem())
	}
	return items, nil
}

// findGameRow 按内部游戏 ID 查询游戏聚合信息。
func (s *BaishunService) findGameRow(ctx context.Context, sysOrigin, gameID string) (gameListRow, error) {
	sysOrigin = normalizeAdminSysOrigin(sysOrigin)
	profile, err := s.activeProfile(ctx, sysOrigin)
	if err != nil {
		return gameListRow{}, err
	}
	var row gameListRow
	err = s.repo.DB.WithContext(ctx).
		Table("sys_game_list_config AS cfg").
		Select(`
			cfg.id AS config_id,
			cfg.sys_origin AS sys_origin,
			ext.profile AS profile,
			cfg.game_id AS internal_game_id,
			cfg.name AS name,
			cfg.category AS category,
			cfg.cover AS cover,
			cfg.sort AS sort,
			cfg.full_screen AS full_screen,
			cfg.game_mode AS game_mode_raw,
			ext.vendor_type AS vendor_type,
			ext.vendor_game_id AS vendor_game_id,
			ext.launch_mode AS launch_mode,
			ext.package_version AS ext_package_version,
			ext.preview_url AS ext_preview_url,
			ext.package_url AS package_url,
				ext.orientation AS ext_orientation,
				ext.safe_height AS ext_safe_height,
				ext.currency_icon AS currency_icon,
				ext.gsp AS ext_gsp,
				ext.extra_json AS ext_extra_json,
				cat.name AS catalog_name,
				cat.cover AS catalog_cover,
			cat.preview_url AS catalog_preview_url,
			cat.download_url AS catalog_download_url,
			cat.package_version AS catalog_package_version,
			cat.orientation AS catalog_orientation,
			cat.safe_height AS catalog_safe_height,
			cat.status AS catalog_status
		`).
		Joins("JOIN sys_game_list_vendor_ext ext ON ext.game_list_config_id = cfg.id AND ext.enabled = 1 AND ext.profile = ?", profile).
		Joins("LEFT JOIN baishun_game_catalog cat ON cat.sys_origin = cfg.sys_origin AND cat.profile = ext.profile AND CAST(cat.vendor_game_id AS CHAR) = ext.vendor_game_id").
		Where("cfg.sys_origin = ? AND cfg.game_id = ? AND ext.vendor_type = ?", sysOrigin, gameID, baishunVendorType).
		Limit(1).
		Scan(&row).Error
	if err != nil {
		return gameListRow{}, err
	}
	if strings.TrimSpace(row.InternalGameID) != "" {
		return row, nil
	}

	var catalog model.BaishunGameCatalog
	if err := s.repo.DB.WithContext(ctx).
		Where("sys_origin = ? AND profile = ? AND internal_game_id = ?", sysOrigin, profile, gameID).
		First(&catalog).Error; err == nil {
		return gameListRow{
			SysOrigin:             sysOrigin,
			Profile:               profile,
			InternalGameID:        defaultIfBlank(catalog.InternalGameID, fmt.Sprintf("bs_%d", catalog.VendorGameID)),
			Name:                  catalog.Name,
			Cover:                 catalog.Cover,
			VendorType:            baishunVendorType,
			VendorGameID:          strconv.Itoa(catalog.VendorGameID),
			LaunchMode:            baishunLaunchModeRemote,
			ExtGSP:                catalog.GSP,
			CatalogCover:          catalog.Cover,
			CatalogPreviewURL:     catalog.PreviewURL,
			CatalogDownloadURL:    catalog.DownloadURL,
			CatalogPackageVersion: catalog.PackageVersion,
			CatalogSafeHeight:     catalog.SafeHeight,
			CatalogOrientation:    catalog.Orientation,
			CatalogStatus:         catalog.Status,
			GameModeRaw:           formatAdminGameModeRaw(baishunFixedGameMode),
		}, nil
	} else if err != gorm.ErrRecordNotFound {
		return gameListRow{}, err
	}

	return gameListRow{}, NewAppError(http.StatusNotFound, "game_not_found", "room game config not found")
}

// findGameRowByConfigID 按系统游戏配置主键查询游戏聚合信息。
func (s *BaishunService) findGameRowByConfigID(ctx context.Context, sysOrigin string, configID int64) (gameListRow, error) {
	sysOrigin = normalizeAdminSysOrigin(sysOrigin)
	profile, err := s.activeProfile(ctx, sysOrigin)
	if err != nil {
		return gameListRow{}, err
	}
	var row gameListRow
	err = s.repo.DB.WithContext(ctx).
		Table("sys_game_list_config AS cfg").
		Select(`
			cfg.id AS config_id,
			cfg.sys_origin AS sys_origin,
			ext.profile AS profile,
			cfg.game_id AS internal_game_id,
			cfg.name AS name,
			cfg.category AS category,
			cfg.cover AS cover,
			cfg.sort AS sort,
			cfg.full_screen AS full_screen,
			cfg.game_mode AS game_mode_raw,
			ext.vendor_type AS vendor_type,
			ext.vendor_game_id AS vendor_game_id,
			ext.launch_mode AS launch_mode,
			ext.package_version AS ext_package_version,
			ext.preview_url AS ext_preview_url,
			ext.package_url AS package_url,
				ext.orientation AS ext_orientation,
				ext.safe_height AS ext_safe_height,
				ext.currency_icon AS currency_icon,
				ext.gsp AS ext_gsp,
				ext.extra_json AS ext_extra_json,
				cat.name AS catalog_name,
				cat.cover AS catalog_cover,
			cat.preview_url AS catalog_preview_url,
			cat.download_url AS catalog_download_url,
			cat.package_version AS catalog_package_version,
			cat.orientation AS catalog_orientation,
			cat.safe_height AS catalog_safe_height,
			cat.status AS catalog_status
		`).
		Joins("JOIN sys_game_list_vendor_ext ext ON ext.game_list_config_id = cfg.id AND ext.enabled = 1 AND ext.profile = ?", profile).
		Joins("LEFT JOIN baishun_game_catalog cat ON cat.sys_origin = cfg.sys_origin AND cat.profile = ext.profile AND CAST(cat.vendor_game_id AS CHAR) = ext.vendor_game_id").
		Where("cfg.sys_origin = ? AND cfg.id = ? AND ext.vendor_type = ?", sysOrigin, configID, baishunVendorType).
		Limit(1).
		Scan(&row).Error
	if err != nil {
		return gameListRow{}, err
	}
	if row.ConfigID > 0 {
		return row, nil
	}
	return gameListRow{}, NewAppError(http.StatusNotFound, "game_not_found", "room game config not found")
}

// resolveGSP 解析行模型中的 GSP 值。
func (s *BaishunService) resolveGSP(row gameListRow, runtimeCfg baishunRuntimeConfig) int {
	if parsed, err := strconv.Atoi(strings.TrimSpace(row.ExtGSP)); err == nil && parsed > 0 {
		return parsed
	}
	return runtimeCfg.gsp()
}