class MyPromise {
    constructor(callback) {
        try {
            this.that = this
            this.callback = callback;
            this.successCallbackArray = []
            this.resolveData = []
            this.status = "pending"
            // this.errorCallback = null
            this.all = (P, callback) => {
                try {
                    if (P instanceof Array) {
                        try {
                            P.forEach(p => (
                                p.then((val) => {
                                    try {
                                        this.resolveData.push(val)
                                        if (this.resolveData.length == P.length) {
                                            if (this.status == 'pending') {
                                                callback(this.resolveData)
                                            }
                                        }
                                    } catch (val) {
                                        this.status = 'error'
                                        this.reject(val)
                                    }
                                }).catch(val => {
                                    this.reject(val)
                                })
                            ))
                        } catch (val) {
                            this.status = 'error'
                            this.reject(val)
                        }
                    } else {
                        p.then((val) => {
                            this.resolveData = val
                        })
                        callback(this.resolveData)
                    }
                } catch (val) {
                    this.status = 'error'
                    this.reject(val)
                }
                return this
            }
            this.all = this.all.bind(this)
            this.then = (callback) => {
                this.successCallbackArray.push(callback)
                return this
            }
            this.catch = (callback) => {
                this.errorCallback = callback
                return this
            };
            this.resolve = (val) => {
                if (this.status == 'pending') {
                    setTimeout(() => {
                        try {
                            this.successCallbackArray.forEach(callback => {
                                val = callback(val)
                            })
                        } catch (val) {
                            this.reject(val)
                        }
                    })
                }
                return this
            };
            this.reject = (val) => {
                this.status = 'error'
                setTimeout(() => {
                    this.errorCallback(val)
                })
                return this
            };
            try {
                if (this.callback instanceof Function) {
                    this.callback(this.resolve, this.reject)
                }
            } catch (error) {
                this.status = 'error'
                this.reject(error)
            }
        } catch (val) {
            this.status = 'error'
            this.reject(val)
        }
    }
}
let p1 = new MyPromise((rev, rej) => {
    rej(1)
})
let p2 = new MyPromise((rev, rej) => {
    rej(2)
})
let p3 = new MyPromise((rev, rej) => {
    rev(3)
})


console.log(1)
new MyPromise((rev, rej) => {
    console.log(2)
    rev(1)
})
    .then(res => {
        console.log(4)
        console.log('ok' + res)
        return 3
    }).then(res => {
        console.log('ok2' + res)
    }).catch((res) => {
        console.log(4)
        console.log('err' + res)
    })
console.log(3)



new MyPromise()
    .all([p1, p2, p3], (res) => {
        console.log(res)
    }).catch((error) => {
        console.log(error)
    })