export function parseImagePromptFromContent(content) {
    if (!content || !content.includes('[IMAGE_PROMPT:')) return { text: content, prompt: null };
    const match = content.match(/\[IMAGE_PROMPT:(.*?)\]/s);
    const prompt = match ? match[1].trim() : null;
    const text = content.replace(/\[IMAGE_PROMPT:.*?\]/gs, '').trim();
    return { text, prompt };
}

export async function copyToClipboard(text) {
    try {
        await navigator.clipboard.writeText(text);
        return true;
    } catch {
        return false;
    }
}

export const GENRE_LABELS = {
    adventure: 'Приключение',
    horror: 'Хоррор',
    romance: 'Романтика',
    slice_of_life: 'Повседневность',
    fantasy: 'Фэнтези',
    sci_fi: 'Sci-Fi',
};

export function initWizard(modalEl, { totalSteps, onStepChange, validateStep }) {
    let step = 1;
    const pages = modalEl.querySelectorAll('.wizard-page');
    const dots = modalEl.querySelectorAll('.wizard-step-dot');
    const prevBtn = modalEl.querySelector('[id$="Prev"]');
    const nextBtn = modalEl.querySelector('[id$="Next"]');
    const saveBtn = modalEl.querySelector('[id$="Save"], [id$="Confirm"], [id$="Create"]');

    function render() {
        pages.forEach(p => p.classList.toggle('active', Number(p.dataset.step) === step));
        dots.forEach(d => {
            const n = Number(d.dataset.step);
            d.classList.toggle('active', n === step);
            d.classList.toggle('done', n < step);
        });
        prevBtn?.classList.toggle('hidden', step <= 1);
        nextBtn?.classList.toggle('hidden', step >= totalSteps);
        saveBtn?.classList.toggle('hidden', step < totalSteps);
        onStepChange?.(step);
    }

    function goTo(next) {
        if (next > step && validateStep && !validateStep(step)) return;
        step = Math.max(1, Math.min(totalSteps, next));
        render();
    }

    prevBtn?.addEventListener('click', () => goTo(step - 1));
    nextBtn?.addEventListener('click', () => goTo(step + 1));

    render();

    return {
        reset() { step = 1; render(); },
        getStep: () => step,
        goTo,
        render,
    };
}

export function bindGenreGrid(gridEl, selectedSet, onChange) {
    gridEl.addEventListener('click', (e) => {
        const btn = e.target.closest('.genre-btn');
        if (!btn) return;
        const genre = btn.dataset.genre;
        if (selectedSet.has(genre)) {
            selectedSet.delete(genre);
            btn.classList.remove('selected');
        } else {
            selectedSet.add(genre);
            btn.classList.add('selected');
        }
        onChange?.();
    });
}

export function resetGenreGrid(gridEl, selectedSet) {
    selectedSet.clear();
    gridEl.querySelectorAll('.genre-btn').forEach(b => b.classList.remove('selected'));
}

export function getRpgSettingsFromDom(prefix = '') {
    const id = (name) => document.getElementById(prefix + name);
    return {
        dice: id('settingDice')?.checked ?? true,
        narrator: id('settingNarrator')?.checked ?? true,
        quests: id('settingQuests')?.checked ?? true,
        affinity: id('settingAffinity')?.checked ?? true,
        choices: id('settingChoices')?.checked ?? true,
    };
}

export function formatSessionDate(iso) {
    if (!iso) return '';
    const d = new Date(iso.includes('T') ? iso : iso.replace(' ', 'T') + 'Z');
    if (Number.isNaN(d.getTime())) return '';
    const now = new Date();
    const sameDay = d.toDateString() === now.toDateString();
    if (sameDay) return d.toLocaleTimeString('ru-RU', { hour: '2-digit', minute: '2-digit' });
    return d.toLocaleDateString('ru-RU', { day: 'numeric', month: 'short' });
}