package service

import (
	"fmt"
	"github.com/golang/protobuf/proto"
	"sort"
	"texas-poker-bk/api"
	"texas-poker-bk/internal/game"
	"texas-poker-bk/internal/service/store"
	"texas-poker-bk/internal/session"
	"texas-poker-bk/tool/collect"
)

// HandleReqCreateTable 创建桌面 TODO 当前在房间则不可创建房间了
func HandleReqCreateTable(account session.NetAccount, msg *api.ReqCreateTable) (proto.Message, error) {
	// 人数，机器人数
	playerNum := msg.Players
	robotNum := msg.Robots
	if playerNum+robotNum <= 0 {
		return &api.ResFail{Msg: "至少添加一个玩家或机器人"}, nil
	}
	// 初始化一个牌桌
	table := &game.Table{}
	table.TableNo = store.TableNo.Add(1)
	table.PlayerNum = int32(playerNum) + 1
	table.RobotNum = int32(playerNum)
	table.Players = make([]*game.Player, playerNum)
	table.Robots = make([]*game.Robot, robotNum)
	// 房主 [0]
	owner := &game.Player{
		Id:       account.Id,
		Username: account.UserName,
		Avatar:   account.Avatar,
		Status:   1,
		Chip:     500,
	}
	// 扣除DB账户余额 TODO 账户金额限制
	account.DecrementBalance(500)

	table.Players[0] = owner
	for i := 0; i < int(robotNum); i++ {
		table.Robots[i] = &game.Robot{}
	}
	err := store.SaveNewTable(table)
	if err != nil {
		return &api.ResFail{Msg: err.Error()}, nil
	}
	return &api.ResCreateTable{TableNo: table.TableNo}, nil
}

// HandleReqLobbyView 返回当前所有桌面和玩家数量
func HandleReqLobbyView(account session.NetAccount, msg *api.ReqLobbyView) (proto.Message, error) {
	res := &api.ResLobbyView{}
	if store.LobbyTables == nil || len(store.LobbyTables) == 0 {
		return res, nil
	}
	tables := make([]*api.LobbyTable, len(store.LobbyTables))
	res.Tables = tables

	// 遍历 store tables 转换为视图层结构体
	idx := 0
	for _, t := range store.LobbyTables {
		table := &api.LobbyTable{TableNo: t.TableNo, PlayerNum: t.PlayerNum, RobotNum: t.RobotNum}
		table.Players = make([]*api.LobbyPlayer, t.PlayerNum+t.RobotNum)

		playerIdx := 0
		if collect.IsNotEmptySlice(t.Players) {
			for _, p := range t.Players {
				if p == nil {
					playerIdx++
					continue
				}
				player := &api.LobbyPlayer{Robot: false, Id: p.Id, Username: p.Username, Avatar: p.Avatar}
				table.Players[playerIdx] = player
				playerIdx++
			}
		}
		if collect.IsNotEmptySlice(t.Robots) {
			for _, _ = range t.Robots {
				table.Players[playerIdx] = &api.LobbyPlayer{Robot: true}
				playerIdx++
			}
		}

		tables[idx] = table
		idx++
	}
	// 牌桌号降序
	sort.Slice(tables, func(i, j int) bool {
		return tables[i].TableNo > tables[j].TableNo
	})
	return res, nil
}

// HandleJoinTable 加入牌桌
func HandleJoinTable(account session.NetAccount, msg *api.ReqJoinTable) (proto.Message, error) {
	account.Lock.Lock()
	defer account.Lock.Unlock()

	if account.Player != nil {
		return &api.ResFail{Msg: fmt.Sprintf("用户当前已加入#%d牌桌", account.Player.GameTable.TableNo)}, nil
	}
	// account -> player
	// TODO 账户余额限制

	table := store.LobbyTables[msg.TableNo]
	if table == nil {
		return &api.ResFail{Msg: "牌桌不存在"}, nil
	}
	player := &game.Player{
		Id:        account.Id,
		Username:  account.UserName,
		Avatar:    account.Avatar,
		Status:    1,
		Chip:      500,
		GameTable: table,
	}
	err := table.JoinPlayer(player)
	if err != nil {
		return nil, err
	}
	// 从账户扣除进入牌桌的金额
	account.DecrementBalance(500)
	account.Player = player
	return &api.ResSuccess{}, nil
}

// HandleLeaveTable 离开牌桌
func HandleLeaveTable(account session.NetAccount, msg *api.ReqCreateTable) (proto.Message, error) {
	account.Lock.Lock()
	defer account.Lock.Unlock()
	// 结算, player -> nil
	if account.Player == nil {
		return &api.ResFail{Msg: "当前未加入牌桌"}, nil
	}
	// 根据玩家游戏状态判断可否退出
	switch account.Player.Status {
	case 1, 2, 7: // 未在游戏中 可退出
		// 结算金额
		account.IncrementBalance(account.Player.Chip)
		gameTable := account.Player.GameTable
		// table player remove
		for i := range gameTable.Players {
			if gameTable.Players[i] == account.Player {
				gameTable.Players[i] = nil
			}
		}
		account.Player = nil
		// TODO notice 牌桌其他玩家 gameTable.notice(ResGameStatus)
		return &api.ResSuccess{}, nil
	default:
		return &api.ResFail{Msg: "游戏进行中,不能退出"}, nil
	}
}

// HandleReqReadyStart 准备开始游戏
func HandleReqReadyStart(player game.Player, msg *api.ReqReadyStart) (proto.Message, error) {

	return nil, nil
}