import { $ } from './utils/dom';

const badWords = [
    'artist', 'takedown', 'owner', 'delete', 'remove', 'creator', 'take-down', 'removed', 'stole', 'stolen', 'steal'
];

const badPairs = [
    'take down'
];

const promptTexts = [
    "READ THIS:\n" +
    "Are you reporting this image because you want it taken down? TOO BAD. We do not do that here. Close the tab and leave.\n" +
    "Is this a mistake, and you still want to submit this report?\n" +
    "Press OK to submit report, press cancel to cancel.",
    /* ----- */
    "Are you really sure this is not a takedown request and you wish to submit this report? You will be banned if this is a takedown request.\n" +
    "Press OK to submit report, press cancel to cancel."
]

function makeWordPairs(words) {
    const wordPairs = [];
    for (let i = 0; i < words.length - 1; i++) {
        wordPairs.push(words[i] + ' ' + words[i + 1]);
    }

    return wordPairs;
}

function calculateBadWordScore(reportReason, value) {
    const valueWords = value.toLowerCase().split(/\s/);
    const wordPairs = makeWordPairs(valueWords);
    let score = 0;

    if (reportReason === 'Other') {
        score++;
    }

    for (const word of valueWords) {
        if (badWords.indexOf(word) !== -1) {
            score++;
        }
    }

    for (const pair of wordPairs) {
        if (badPairs.indexOf(pair) !== -1) {
            score++;
        }
    }

    return score;
}

const onReportSubmitted = function(evt) {
    const reportForm = evt.target;
    const ruleField = $('#category', reportForm);
    const additionalField = $('#report_reason', reportForm);

    if (calculateBadWordScore(ruleField.value, additionalField.value) >= 2) {
        for (const message of promptTexts) {
            if (!confirm(message)) {
                evt.preventDefault();
                break;
            }
        }
    }
};

const setupReportWarnings = function() {
    const reportForm = $('.js-report-form');

    if (!reportForm) {
        return;
    }

    reportForm.addEventListener('submit', onReportSubmitted);
};

export { setupReportWarnings };