class LazyMan {
    running
    tasks = []

    constructor(name) {
        this.name = name
    }

    checkRun () {
        if(!this.running) this.next()
    }
    next() {
        let task = this.tasks.shift()
        if(task) {
            this.running = true
            task()
        } else {
            this.running = false
        }
    }

    eat(food) {
        const task = () => {
            console.log(`${this.name} eat ${food}`);
            this.next()
        }
        this.tasks.push(task)
        this.checkRun()
        return this
    }

    sleep(seconds) {
        
        const task = () => {
            setTimeout(() => {
                console.log(`${this.name} 已经睡了　${seconds}秒了`)
                this.next()
            }, seconds * 1000)
        }
        this.tasks.push(task)
        this.checkRun()
        return this
    }
}

const me = new LazyMan('super')
me.eat('苹果').eat('香蕉').sleep(3).eat('橘子')
setTimeout(() => {
    me.eat('椰子').sleep(2).eat('芒果')
}, 5000)```