import { qs, isMobileViewport } from '../utils/dom.js';
import { copyToClipboard, flashFeedback, flashClass } from '../utils/clipboard.js';
import { typewriterReveal } from '../animations/typewriter.js';
import { initFluidByteField } from '../animations/fluid-byte-field.js';
import { DISCORD_LOADER_SCRIPT, COPY_FEEDBACK_DURATION_MS } from '../config/constants.js';

const HERO_GREETING = 'Vyla Home';

function initVideoColorExtraction() {
    const videos = document.querySelectorAll('.hero-atmosphere-video');
    if (videos.length === 0) return;

    console.log('Video color extraction initialized, found', videos.length, 'videos');

    const canvas = document.createElement('canvas');
    const ctx = canvas.getContext('2d', { willReadFrequently: true });
    let animationFrameId;
    let frameCount = 0;
    let currentVideoColor = 'rgb(0, 0, 0)';

    function extractColors() {
        const video = videos[0];
        if (video.readyState < 2) {
            console.log('Video not ready, readyState:', video.readyState);
            animationFrameId = requestAnimationFrame(extractColors);
            return;
        }

        try {
            canvas.width = 64;
            canvas.height = 64;
            ctx.drawImage(video, 0, 0, 64, 64);
            const imageData = ctx.getImageData(0, 0, 64, 64);
            const data = imageData.data;

            let r = 0, g = 0, b = 0;
            let count = 0;

            for (let i = 0; i < data.length; i += 4) {
                r += data[i];
                g += data[i + 1];
                b += data[i + 2];
                count++;
            }

            r = Math.round(r / count);
            g = Math.round(g / count);
            b = Math.round(b / count);

            currentVideoColor = `rgb(${r}, ${g}, ${b})`;
            const dominantColorTransparent = `rgba(${r}, ${g}, ${b}, 0.5)`;

            document.documentElement.style.setProperty('--video-dominant-color', currentVideoColor);
            document.documentElement.style.setProperty('--video-dominant-color-transparent', dominantColorTransparent);

            if (window.scrollY === 0) {
                document.documentElement.style.setProperty('--color-bg', currentVideoColor);
            }

            frameCount++;
            if (frameCount % 30 === 0) {
                console.log('Frame', frameCount, '- Extracted color:', currentVideoColor);
                console.log('CSS variable set:', getComputedStyle(document.documentElement).getPropertyValue('--video-dominant-color'));
            }
        } catch (e) {
            console.error('Error extracting video colors:', e);
        }

        animationFrameId = requestAnimationFrame(extractColors);
    }

    function handleScroll() {
        const scrollY = window.scrollY;
        const heroHeight = window.innerHeight;
        const scrollProgress = Math.min(scrollY / (heroHeight * 0.5), 1);

        const videoColorRGB = currentVideoColor.match(/\d+/g);
        if (videoColorRGB) {
            const r = Math.round(parseInt(videoColorRGB[0]) * (1 - scrollProgress));
            const g = Math.round(parseInt(videoColorRGB[1]) * (1 - scrollProgress));
            const b = Math.round(parseInt(videoColorRGB[2]) * (1 - scrollProgress));
            const fadedColor = `rgb(${r}, ${g}, ${b})`;
            document.documentElement.style.setProperty('--color-bg', fadedColor);
        }
    }

    animationFrameId = requestAnimationFrame(extractColors);
    window.addEventListener('scroll', handleScroll, { passive: true });
    handleScroll();

    videos.forEach(video => {
        video.addEventListener('pause', () => {
            console.log('Video paused, stopping color extraction');
            cancelAnimationFrame(animationFrameId);
        });

        video.addEventListener('play', () => {
            console.log('Video playing, starting color extraction');
            animationFrameId = requestAnimationFrame(extractColors);
        });
    });
}

function initHeroTitle() {
    const heroTitle = qs('.hero-title');
    if (heroTitle) typewriterReveal(heroTitle, HERO_GREETING);
}

function initDiscordCopyBar() {
    const copyBtn = document.getElementById('copy-discord-btn');
    const copyLabel = document.getElementById('copy-discord-label');
    const copyIcon = document.getElementById('copy-discord-icon');
    if (!copyBtn) return;

    copyBtn.addEventListener('click', async () => {
        await copyToClipboard(DISCORD_LOADER_SCRIPT);
        if (copyIcon) flashClass(copyIcon, 'copied', COPY_FEEDBACK_DURATION_MS);
    });
}

function initHeroCopyButton() {
    const heroCopyScriptBtn = document.getElementById('hero-copy-script-btn');
    if (!heroCopyScriptBtn) return;

    heroCopyScriptBtn.addEventListener('click', async () => {
        await copyToClipboard(DISCORD_LOADER_SCRIPT);
        flashFeedback(heroCopyScriptBtn, 'Copied!', COPY_FEEDBACK_DURATION_MS);
    });
}

function initCtaCopyButton() {
    const ctaCopyScriptBtn = document.getElementById('cta-copy-script-btn');
    if (!ctaCopyScriptBtn) return;

    ctaCopyScriptBtn.addEventListener('click', async () => {
        await copyToClipboard(DISCORD_LOADER_SCRIPT);
        flashFeedback(ctaCopyScriptBtn, 'Copied!', COPY_FEEDBACK_DURATION_MS);
    });
}

export function initHeroSection() {
    initHeroTitle();
    initDiscordCopyBar();
    initHeroCopyButton();
    initCtaCopyButton();
    initVideoColorExtraction();
    initFluidByteField('hero-byte-overlay');
    initFluidByteField('cta-byte-overlay');
}