const express = require('express')
const app = express()
const host = '0.0.0.0'
const port = 3000
app.use(require('compression')())
app.use(express.static('public'))
const server = app.listen(port, host, () => console.info(`包剪锤 http://${host}:${port}`))
const io = require('socket.io')(server)

const status = {
    player1: {
        id: '',
        name: '玩家甲',
        score: 0,
        shape: '',
        result: '',
        current: '',
    },
    player2: {
        id: '',
        name: '玩家乙',
        score: 0,
        shape: '',
        result: '',
        current: '',
    },
}

io.on('connection', (client) => {
    if (!status.player1.id) {
        status.player1.id = client.id
        status.player1.name = '玩家甲'
        status.player1.score = 0
        status.player1.shape = ''
        status.player1.result = ''
        status.player1.current = ''
    } else if (!status.player2.id) {
        status.player2.id = client.id
        status.player2.name = '玩家乙'
        status.player2.score = 0
        status.player2.shape = ''
        status.player2.result = ''
        status.player2.current = ''
    }
    io.emit('status', status)

    client.on('rename', (name) => {
        name = name.trim()
        if (name == '' || name == status.player1.name || name == status.player2.name) return false
        if (status.player1.id == client.id) status.player1.name = name
        else if (status.player2.id == client.id) status.player2.name = name
        io.emit('status', status)
    })

    client.on('disconnect', () => {
        if (status.player1.id == client.id) {
            status.player1.id = ''
            status.player1.name = '玩家甲'
        } else if (status.player2.id == client.id) {
            status.player2.id = ''
            status.player2.name = '玩家乙'
        }
        status.player1.score = 0
        status.player1.shape = ''
        status.player1.result = ''
        status.player1.current = ''
        status.player2.score = 0
        status.player2.shape = ''
        status.player2.result = ''
        status.player2.current = ''
        io.emit('status', status)
    })

    client.on('shape', (shape) => {
        // 接收双方出拳，各一次机会
        if (status.player1.id == client.id && !status.player1.current) status.player1.current = shape
        else if (status.player2.id == client.id && !status.player2.current) status.player2.current = shape
        // 比较双方出拳
        if (status.player1.current && status.player2.current) {
            status.player1.shape = status.player1.current
            status.player2.shape = status.player2.current
            status.player1.current = ''
            status.player2.current = ''
            if (status.player1.shape == status.player2.shape) {
                // 平局各加0.5分
                status.player1.score += 0.5
                status.player2.score += 0.5
                status.player1.result = 'draw'
                status.player2.result = 'draw'
            } else if (
                // 玩家1胜利
                (status.player1.shape == 'rock' && status.player2.shape == 'scissors') ||
                (status.player1.shape == 'scissors' && status.player2.shape == 'paper') ||
                (status.player1.shape == 'paper' && status.player2.shape == 'rock')
            ) {
                status.player1.score++
                status.player1.result = 'win'
                status.player2.result = 'defeated'
            } else {
                // 玩家2胜利
                status.player2.score++
                status.player1.result = 'defeated'
                status.player2.result = 'win'
            }
            io.emit('status', status)
            console.table(status)
        }
    })
})