const channel = require('./general.csv.json');
const fs = require('fs');

var start_date = new Date(channel.messages[0].timestamp);
var date = new Date(start_date);
var now = new Date();

var incrementDate = function(date) {
    return new Date(date.getTime() + (86400 * 1000))
}

var decrementDate = function(date) {
    return new Date(date.getTime() - (86400 * 1000))
}

var indices = {};
var totaledits = {};
var users = [];

var addUser = function(name) {
    for (var i = 0; i < users.length; i++) {
        if (users[i] == name) {
            return;
        }
    }
    users.push(name);
}

for (m in channel.messages) {
    addUser(channel.messages[m].author.name);
}

for (var u = 0; u < users.length; u++) {
    totaledits[users[u]] = {};
    indices[users[u]] = 0;
}

var dateString = function(date) {
    var months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];
    return date.getDate()+"/"+(date.getMonth()+1)+"/"+date.getFullYear();
}

var editsBeforeDate = function(date, user) {
    if(!totaledits[user].hasOwnProperty(dateString(decrementDate(date)))) {
        totaledits[user][dateString(decrementDate(date))] = 0;
    }
    var count = totaledits[user][dateString(decrementDate(date))];
    for (var m = indices[user]; m < channel.messages.length; m++) {
        if(channel.messages[m].author.name == user) {
            if(m%1000 == 0) {
                console.log(m + ": "+ user);
            }
            var message_date = new Date(channel.messages[m].timestamp);
            if (message_date.getTime() > date.getTime()) {
                indices[user] = m;
                return count;
            }

            count++;
        }
    }
    indices[user] = m;
    return count;
}

var csv = "date,";
var headerDate = new Date(start_date);
while (headerDate.getTime() < now.getTime()) {
    csv += dateString(headerDate) +",";
    headerDate=incrementDate(headerDate);
}
csv = csv.slice(0,csv.length-1)+"\n";

function writeCsvLine(user) {
    var line = user + ",";
    for (day in totaledits[user]) {
        line += totaledits[user][day]+",";
    }
    line = line.slice(0,line.length-1) + "\n";
    return line;
}

while (date.getTime() < now.getTime()) {
    for (var u = 0; u < users.length; u++) {
        totaledits[users[u]][dateString(date)] = editsBeforeDate(date, users[u]);
    }
    date = incrementDate(date);
}

for (var u = 0; u < users.length; u++) {
    csv += writeCsvLine(users[u]);
}

fs.writeFileSync("edits_by_day.csv", csv);