const fs = require('fs');

const input = fs.readFileSync('./Chris S. Coaching Tracker - Weekly Tracker.csv', 'utf8');

const rows = [];

const week = {
    'Chest': null,
    'Right thigh': null,
    'Left thigh': null,
    'Waist': null,
    'Left biceps': null,
    'Right biceps': null,
}

let year = 2023;

input.split("\n").forEach((line) => {
    if (line.includes(' 1 Jan')) {
        year++;
    }
    const map = {
        'R Arm': 'Right biceps',
        'L Arm': 'Left biceps',
        'Navel': 'Waist',
        'Chest': 'Chest',
        'R Leg': 'Right thigh',
        'L Leg': 'Left thigh',
    }
    for (let key in map) {
        const val = map[key];
        const match = line.match(new RegExp(`${key},([^,]+)`));
        if (match) {
            week[val] = (1*match[1]).toPrecision(3);
        }
    }
    if (line.startsWith('"Sun')) {
        const match = line.match(/^"(Sun[^"]+)\s*"/)[1];
        const date = new Date(`${match} UTC`);
        date.setFullYear(year);

        for (let key in week) {
            const val = week[key];
            rows.push(`BODYMEASURE,${date.toJSON().split('T')[0]},${key},${val},cm`);
        }
    }
});

['Weight', 'Weight(1)', 'Weight(2)', 'Weight(3)'].forEach((name) => {
    const weightInput = fs.readFileSync(`./${name}.csv`, 'utf8').split("\n");

    weightInput.shift();
    for (let i = 0; i < weightInput.length;) {
        if (!weightInput[i] || !weightInput[i + 1]) {
            i++;
            continue;
        }
        const date = new Date(`${weightInput[i].substring(2, weightInput[i].length - 2)} UTC`);
        const [time, weight, change, bmi, fat, muscle, bone, water] = weightInput[i + 1].split(',')

        if (weight && weight !== '--') {
            const [kg, units] = weight.split(' ');
            rows.push(`BODYMEASURE,${date.toJSON().split('T')[0]},Weight,${kg},${units}`);
        }

        if (fat && fat !== '--') {
            const [perc, units] = fat.split(' ');
            rows.push(`BODYMEASURE,${date.toJSON().split('T')[0]},Fat,${perc},${units}`);
        }

        if (muscle && muscle !== '--' && weight && weight !== '--') {
            const [kg, units] = muscle.split(' ');
            const weightKg = weight.split(' ')[0];
            const perc = (100 * kg / weightKg).toPrecision(3);
            rows.push(`BODYMEASURE,${date.toJSON().split('T')[0]},Muscles,${perc},%`);
        }

        if (water && water !== '--') {
            const [perc, units] = water.split(' ');
            rows.push(`BODYMEASURE,${date.toJSON().split('T')[0]},Water,${perc},${units}`);
        }

        i++;
        while (weightInput[i] && weightInput[i][0] !== '"') {
            i++;
        }
    }
});

rows.sort();

rows.unshift('TABLE,DATE,BODYPART_NAME,MEASURE,UNIT');

fs.writeFileSync('./fnfImport.csv', rows.join("\n"));