const getRandom = (min, max) => {
    return parseInt(Math.random() * (max - min) + min);
}

const cache = [];

const generateData = (min, max) => {
    const time = cache[getRandom(min,parseInt(max/10))] ? cache[getRandom(min,parseInt(max/10))] : (new Date().getTime() + getRandom(min,parseInt(max/10))).toString();

    return {
        _id: getRandom(min, max),
        is_echo: getRandom(min, max) % 2 === 0 ? false : true,
        page_id: getRandom(min, max),
        time: time,
    }

}

// const origin = [
//     { _id: 6, is_echo: false, page_id: 4, time: '1651080432355' },
//     { _id: 2, is_echo: true, page_id: 4, time: '1651080432355' },
//     { _id: 4, is_echo: false, page_id: 5, time: '1651080432355' },
//     { _id: 3, is_echo: false, page_id: 9, time: '1651080432355' },
//     { _id: 2, is_echo: true, page_id: 3, time: '1651080432355' }
//   ];

const origin = [];
const originLength = 100;
const min = 1;
const max = 10;
 for (let i = 0; i < originLength; i++) {
    origin.push(generateData(min, max));
}

console.log(origin);

const temp = {}
const result = [];


origin.map((originItem) => {
    if (!originItem.time) {
        return;
    }
    if (!temp[`${originItem.time}-${originItem.page_id}`]) {
        temp[`${originItem.time}-${originItem.page_id}`] = {
            time: originItem.time,
            page_id: originItem.page_id,
            num_echo_true: originItem.is_echo === true ? 1 : 0,
            num_echo_false: originItem.is_echo === false ? 1 : 0,
        }
    } else {
        if (originItem.is_echo) {
            temp[`${originItem.time}-${originItem.page_id}`].num_echo_true++;
        } else {
            temp[`${originItem.time}-${originItem.page_id}`].num_echo_false++;
        }
    }
    temp[`${originItem.time}-${originItem.page_id}`].total_echo = temp[`${originItem.time}-${originItem.page_id}`].num_echo_true + temp[`${originItem.time}-${originItem.page_id}`].num_echo_false;
});


Object.keys(temp).map((tempKeyItem) => {
    result.push(temp[tempKeyItem]);
});

console.log(result);