"use strict";

var entryEl = document.getElementById("entry")
var guessesEl = document.getElementById("guesses")
var winEl = document.getElementById("win")

function renderWord(word, wordIdx, guess, score, offset) {
    var els = []
    var c = 0;
    for (var syllable of word) {
        var sylEls = []

        var shouldStress = syllable[0] == "/";
        if (shouldStress) {
            syllable = syllable.slice(1)
        }
        var stress = shouldStress ? "stress" : ""
        for (var _ in syllable) {
            var charclass = ''
            var able = ''
            if (score) {
                if (score.greens[c]) {
                    charclass += 'green'
                } else if (score.yellows[c]) {
                    charclass += 'yellow'
                } else if (score.greys[c]) {
                    charclass += 'grey'
                }
                able = 'disabled'
            }
            var val = guess ? guess[wordIdx][c] : ''
            var typ = guess ? 'solbox' : 'entrybox'
            sylEls.push(`<div data-word="${wordIdx}" data-character="${c}" data-offset="${c+offset}" class="box ${typ} ${charclass}">${val}</div>`)
            c++;
        }

        els.push(`<div class="syllable ` + stress + `">` + sylEls.join('') + `</div>`)
    }

    return `<div class="word">` + els.join('') + `</div>`
}

function renderLine(line, guess, scores) {
    var els = []
    var offset = 0;
    for (var wordIdx in line) {
        var word = line[wordIdx]
        els.push(renderWord(word, wordIdx, guess, scores && scores[wordIdx], offset))
        offset += word.join('').replaceAll('/', '').length
    }
    return `<div class="line">` + els.join('') + `</div>`
}

function consumeInput() {
    var els = Array.from(document.getElementsByClassName("entrybox"));
    for (var el of els) {
        if (el.innerText.trim().length == '') {
            return null
        }
    }
    els.sort((x, y) => {
        var xword = x.getAttribute('data-word')
        var xchar = x.getAttribute('data-character')
        var yword = y.getAttribute('data-word')
        var ychar = y.getAttribute('data-character')

        if (xword != yword) {
            return xword - yword;
        }
        return xchar - ychar;
    })
    var words = {}
    for (var el of els) {
        words[el.getAttribute('data-word')] = (words[el.getAttribute('data-word')] || '') +
                el.innerText.trim().toUpperCase()
    }
    return words
}

function scoreLine(guess, answer) {
    var scores = []
    for (var idx in guess) {
        var guessword = guess[idx]
        var answerword = answer[idx].join('').replaceAll('/', '').toUpperCase()
        scores.push(scoreWord(guessword, answerword))
    }
    return scores
}

function scoreWord(guess, answer) {
    var greens = {}
    var yellows = {}
    var greys = {}
    var counts = {}
    var placed = {}
    for (var idx in guess) {
        if (guess[idx] == answer[idx]) {
            greens[idx] = 1
            placed[answer[idx]] = (placed[answer[idx]] || 0) + 1
        }
        counts[answer[idx]] = (counts[answer[idx]] || 0) + 1
    }
    for (var idx in guess) {
        if (greens[idx]) {
            continue
        }
        if ((placed[guess[idx]] || 0) < counts[guess[idx]]) {
            yellows[idx] = 1
            placed[guess[idx]] = (placed[guess[idx]] || 0) + 1;
        } else {
            greys[idx] = 1
        }
    }
    return {greens: greens, yellows: yellows, greys: greys}
}

var focused = null;

document.getElementById('clear').onclick = function(e) {
    e.preventDefault();
    for (var el of document.getElementsByClassName('entrybox')) {
        el.innerText = ''
    }
    unfocus(document.querySelector(`[data-offset="${focused}"]`));
    focus(document.querySelector(`[data-offset="0"]`))
}

document.getElementById('check').addEventListener('click', function(e) {
    var guess = consumeInput()
    if (guess == null) {
        return;
    }
    guesses.push(guess)
    var scores = scoreLine(guess, challenge.line)
    var linehtml = renderLine(challenge.line, guess, scores)
    guessesEl.innerHTML = linehtml + guessesEl.innerHTML
    var win = true;
    for (var score of scores) {
        if (Object.keys(score.yellows).length || Object.keys(score.greys).length) {
            win = false;
        }
    }
    if (win) {
        entryEl.innerHTML = linehtml
        winGame(challenge)
    }
})

function winGame(challenge) {
    winEl.style = 'display: block;'
    document.getElementById('btns').style = 'display: none;'
    document.getElementById('meter').innerText = challenge.meter
    document.getElementById('ctx').innerHTML = challenge.ctx.replaceAll(/^(.*)/gm, '  $1') + `\n\t<span class="byline">&mdash;<a href="${challenge.link}">${challenge.title}</a>, ${challenge.collection}, ${challenge.author}</span>`
    var date = new Date().toISOString().slice(0, 10)
    var firstguess = Object.values(guesses[0]).join(' ')
    document.getElementById('share').value = `I solved the ${date} Prosodyle at cyfraeviolae.org/prosodyle. My first guess was: "${firstguess}".`
}

document.addEventListener('keydown', function(e) {
    // if (!Array.from(e.target.classList).includes('entrybox')) {
    //     return;
    // }
    // if (e.ctrlKey || e.altKey || (e.key.length != 1 && e.key != 'Backspace')) {
    //     return;
    // }
    if (e.ctrlKey || e.altKey || (!"ABCDEFGHIJKLMNOPQRSTUVWXYZ".includes(e.key.toUpperCase()) && e.key != 'Backspace' && e.key != 'Enter')) {
        return;
    }
    if (e.target.id == 'share') {
        return;
    }
    e.preventDefault();

    if (e.key == 'Enter') {
        document.getElementById('check').click()
        return;
    }
    var el = document.querySelector(`[data-offset="${focused}"]`);
    var offset = parseInt(el.getAttribute('data-offset'))
    var nextel;
    if (e.key == 'Backspace') {
        el.innerText = '';
        nextel = document.querySelector(`[data-offset="${offset-1}"]`);
    } else {
        el.innerText = e.key.toUpperCase();
        nextel = document.querySelector(`[data-offset="${offset+1}"]`);
    }
    if (nextel) {
        focus(nextel);
        unfocus(el);
    }
})

document.addEventListener('mousedown', function(e) {
    console.log('click', e.target)
    if (Array.from(e.target.classList).includes('entrybox')) {
        unfocus(document.querySelector(`[data-offset="${focused}"]`));
        focus(e.target);
    }
})

function getDailyChallenge() {
    // https://stackoverflow.com/a/8619946
    var now = new Date();
    var start = new Date(now.getFullYear(), 0, 0);
    var diff = now - start;
    var oneDay = 1000 * 60 * 60 * 24;
    var day = Math.floor(diff / oneDay);
    // end snippet
    return challenges[day-57]
}

document.getElementById('copy').addEventListener('click', function(e) {
    e.preventDefault();
    document.getElementById('share').select()
    document.execCommand('copy');
})

function focus(el) {
    focused = parseInt(el.getAttribute('data-offset'))
    el.classList.add('focus')
    document.getElementById('kb').focus()
}

function unfocus(el) {
    el.classList.remove('focus')
}


var guesses = []
var challenge = getDailyChallenge()
entryEl.innerHTML = renderLine(challenge.line)
focus(document.querySelector(`[data-offset="0"]`));