package baishun

import (
	"chatapp3-golang/internal/service/gameprovider"
	"context"
	"errors"
	"strconv"
)

var _ gameprovider.Provider = (*AppProvider)(nil)

// AppProvider 把百顺服务适配成统一厂商接口。
type AppProvider struct {
	service *BaishunService
}

// NewAppProvider 创建百顺统一厂商适配器。
func NewAppProvider(service *BaishunService) *AppProvider {
	if service == nil {
		return nil
	}
	return &AppProvider{service: service}
}

// Key 返回统一厂商标识。
func (p *AppProvider) Key() string {
	return baishunVendorType
}

// DisplayName 返回厂商展示名。
func (p *AppProvider) DisplayName() string {
	return "百顺"
}

// SupportsLaunch 判断启动请求是否属于百顺。
func (p *AppProvider) SupportsLaunch(ctx context.Context, user gameprovider.AuthUser, req gameprovider.LaunchRequest) (bool, error) {
	_, err := p.service.resolveLaunchGameRow(ctx, user.SysOrigin, BaishunLaunchAppRequest{
		ID:     req.ID,
		GameID: req.GameID,
	})
	if err == nil {
		return true, nil
	}
	var appErr *AppError
	if errors.As(err, &appErr) && appErr.Code == "game_not_found" {
		return false, nil
	}
	return false, err
}

// ListShortcutGames 返回百顺房间快捷游戏。
func (p *AppProvider) ListShortcutGames(ctx context.Context, user gameprovider.AuthUser, roomID string) ([]gameprovider.RoomGameListItem, error) {
	items, err := p.service.ListShortcutGames(ctx, user, roomID)
	if err != nil {
		return nil, err
	}
	return mapRoomGameListItems(items), nil
}

// ListRoomGames 返回百顺房间游戏列表。
func (p *AppProvider) ListRoomGames(ctx context.Context, user gameprovider.AuthUser, roomID, category string) (*gameprovider.RoomGameListResponse, error) {
	resp, err := p.service.ListRoomGames(ctx, user, roomID, category)
	if err != nil {
		return nil, err
	}
	return &gameprovider.RoomGameListResponse{Items: mapRoomGameListItems(resp.Items)}, nil
}

// GetRoomState 返回百顺房间状态。
func (p *AppProvider) GetRoomState(ctx context.Context, user gameprovider.AuthUser, roomID string) (*gameprovider.RoomStateResponse, error) {
	resp, err := p.service.GetRoomState(ctx, user, roomID)
	if err != nil {
		return nil, err
	}
	return mapRoomStateResponse(resp), nil
}

// LaunchGame 启动百顺游戏。
func (p *AppProvider) LaunchGame(ctx context.Context, user gameprovider.AuthUser, req gameprovider.LaunchRequest, clientIP string) (*gameprovider.LaunchResponse, error) {
	resp, err := p.service.LaunchGame(ctx, user, BaishunLaunchAppRequest{
		ID:           req.ID,
		RoomID:       req.RoomID,
		GameID:       req.GameID,
		SceneMode:    req.SceneMode,
		ClientOrigin: req.ClientOrigin,
	}, clientIP)
	if err != nil {
		return nil, err
	}
	return &gameprovider.LaunchResponse{
		ID:             resp.ID,
		GameSessionID:  resp.GameSessionID,
		Provider:       baishunVendorType,
		GameID:         resp.GameID,
		ProviderGameID: strconv.Itoa(resp.VendorGameID),
		Entry: gameprovider.LaunchEntry{
			LaunchMode:     resp.Entry.LaunchMode,
			EntryURL:       resp.Entry.EntryURL,
			PreviewURL:     resp.Entry.PreviewURL,
			DownloadURL:    resp.Entry.DownloadURL,
			PackageVersion: resp.Entry.PackageVersion,
			Orientation:    resp.Entry.Orientation,
			SafeHeight:     resp.Entry.SafeHeight,
		},
		LaunchConfig: resp.BridgeConfig,
		RoomState:    *mapRoomStateResponse(&resp.RoomState),
	}, nil
}

// CloseGame 关闭百顺游戏。
func (p *AppProvider) CloseGame(ctx context.Context, user gameprovider.AuthUser, req gameprovider.CloseRequest) (*gameprovider.RoomStateResponse, error) {
	resp, err := p.service.CloseGame(ctx, user, BaishunCloseAppRequest{
		RoomID:        req.RoomID,
		GameSessionID: req.GameSessionID,
		Reason:        req.Reason,
	})
	if err != nil {
		return nil, err
	}
	return mapRoomStateResponse(resp), nil
}

func mapRoomGameListItems(items []RoomGameListItem) []gameprovider.RoomGameListItem {
	result := make([]gameprovider.RoomGameListItem, 0, len(items))
	for _, item := range items {
		result = append(result, gameprovider.RoomGameListItem{
			ID:             item.ID,
			GameID:         item.GameID,
			GameType:       item.GameType,
			Provider:       baishunVendorType,
			ProviderGameID: strconv.Itoa(item.VendorGameID),
			Name:           item.Name,
			Cover:          item.Cover,
			Category:       item.Category,
			Sort:           item.Sort,
			LaunchMode:     item.LaunchMode,
			FullScreen:     item.FullScreen,
			GameMode:       item.GameMode,
			SafeHeight:     item.SafeHeight,
			Orientation:    item.Orientation,
			PackageVersion: item.PackageVersion,
			Status:         item.Status,
			LaunchParams:   item.LaunchParams,
		})
	}
	return result
}

func mapRoomStateResponse(resp *BaishunRoomStateResponse) *gameprovider.RoomStateResponse {
	if resp == nil {
		return nil
	}
	state := &gameprovider.RoomStateResponse{
		RoomID:           resp.RoomID,
		State:            resp.State,
		Provider:         baishunVendorType,
		GameSessionID:    resp.GameSessionID,
		CurrentGameID:    resp.CurrentGameID,
		CurrentGameName:  resp.CurrentGameName,
		CurrentGameCover: resp.CurrentGameCover,
		HostUserID:       resp.HostUserID,
	}
	if resp.CurrentVendorGameID > 0 {
		state.CurrentProviderGameID = strconv.Itoa(resp.CurrentVendorGameID)
	}
	return state
}