const express = require('express')
const app = express()
app.use(express.static('public'))
const host = process.env.HOST || '0.0.0.0'
const port = process.env.PORT || 3000
const server = app.listen(port, host, () => console.log(`陆战棋游戏服务运行在 http://${host}:${port}/`))
const io = require('socket.io')(server)

const clients = []
let player1 = null
let player2 = null
let startTime = null
let isStarted = false
let player1Ready = false
let player2Ready = false
let currentPlayer = null

io.on('connection', (client) => {
    handleConnection(client)
    client.on('disconnect', () => handleDisconnection(client))
    client.on('join', () => handleJoin(client))
})

// 处理客户端连接
function handleConnection(client) {
    clients.push(client)
    client.emit('joined', { player: 'player1', ip: player1 != null ? player1.handshake.address : '' })
    client.emit('joined', { player: 'player2', ip: player2 != null ? player2.handshake.address : '' })
}

// 处理客户端断线
function handleDisconnection(client) {
    const index = clients.indexOf(client)
    clients.splice(index, 1)
}

// 处理参战请求
function handleJoin(client) {
    if (player1 != null && player2 != null) {
        client.emit('alert', '玩家已满，无法加入游戏。')
        return
    }

    if (client == player1 || client == player2) {
        client.emit('alert', '你已加入，无法重新加入。')
        return
    }

    if (player1 == null) {
        player1 = client
        client.emit('alert', '加入游戏成功，你是黑方。')
        io.emit('joined', { player: 'player1', ip: client.handshake.address })
        return
    }

    if (player2 == null) {
        player2 = client
        client.emit('alert', '加入游戏成功，你是红方。')
        io.emit('joined', { player: 'player2', ip: client.handshake.address })
        return
    }
}