#!/usr/bin/env node

const args = process.argv.slice(2);

if (!args.length) {
    console.log('Usage: exif <glob> [--only field[,...]]');
    process.exit();
}

console.log(`Parsing EXIF data from ${args}`);

const extract = require('../index.js');
const argv = require('minimist')(args, {default: {only: ''}});
const match = argv.only.split(',').map(m => m.toLowerCase()).filter(m => m.length);

extract(argv._, (errors, exif_tree) => {
    if (errors.length) {
        console.error('Errors:', errors);
    }

    exif_tree.forEach(log);
});

function log(node) {
    if (this.isRoot) {
        return;
    }

    if (this.path.length === 1) {
        // File path
        console.log();
        console.log(`${this.path[0]}:`);
        return;
    }

    if (this.key instanceof Number) {
        // Index of exif object
        console.log();
        return;
    }

    if (match.length && match.indexOf(this.key.toLowerCase()) < 0) {
        // No match
        return;
    }

    if (this.notLeaf) {
        // Category
        console.log(`${Array(this.path.length).join(' ')}${this.key}:`);
        return;
    }

    if (!Object.keys(node).length) {
        // Category with no contents
        return;
    }

    // Leaf
    console.log(`${Array(this.path.length).join(' ')}${this.key}: ${node}`);
}