/**
 * Value Sources — CRUD for scalar value sources (static, animated, audio, adaptive_time, adaptive_scene).
 *
 * Value sources produce a float 0.0-1.0 used for dynamic brightness control
 * on LED targets. Five subtypes: static (constant), animated (waveform),
 * audio (audio-reactive), adaptive_time (time-of-day schedule),
 * adaptive_scene (scene brightness analysis).
 *
 * Card rendering is handled by streams.js (Value tab).
 * This module manages the editor modal and API operations.
 */

import { _cachedValueSources, set_cachedValueSources, _cachedAudioSources, _cachedStreams } from '../core/state.js';
import { fetchWithAuth, escapeHtml } from '../core/api.js';
import { t } from '../core/i18n.js';
import { showToast, showConfirm } from '../core/ui.js';
import { Modal } from '../core/modal.js';
import { loadPictureSources } from './streams.js';

class ValueSourceModal extends Modal {
    constructor() { super('value-source-modal'); }

    snapshotValues() {
        const type = document.getElementById('value-source-type').value;
        return {
            name: document.getElementById('value-source-name').value,
            description: document.getElementById('value-source-description').value,
            type,
            value: document.getElementById('value-source-value').value,
            waveform: document.getElementById('value-source-waveform').value,
            speed: document.getElementById('value-source-speed').value,
            minValue: document.getElementById('value-source-min-value').value,
            maxValue: document.getElementById('value-source-max-value').value,
            audioSource: document.getElementById('value-source-audio-source').value,
            mode: document.getElementById('value-source-mode').value,
            sensitivity: document.getElementById('value-source-sensitivity').value,
            smoothing: document.getElementById('value-source-smoothing').value,
            adaptiveMin: document.getElementById('value-source-adaptive-min-value').value,
            adaptiveMax: document.getElementById('value-source-adaptive-max-value').value,
            pictureSource: document.getElementById('value-source-picture-source').value,
            sceneBehavior: document.getElementById('value-source-scene-behavior').value,
            sceneSensitivity: document.getElementById('value-source-scene-sensitivity').value,
            sceneSmoothing: document.getElementById('value-source-scene-smoothing').value,
            schedule: JSON.stringify(_getScheduleFromUI()),
        };
    }
}

const valueSourceModal = new ValueSourceModal();

// ── Modal ─────────────────────────────────────────────────────

export async function showValueSourceModal(editData) {
    const isEdit = !!editData;
    const titleKey = isEdit ? 'value_source.edit' : 'value_source.add';

    document.getElementById('value-source-modal-title').textContent = t(titleKey);
    document.getElementById('value-source-id').value = isEdit ? editData.id : '';
    document.getElementById('value-source-error').style.display = 'none';

    const typeSelect = document.getElementById('value-source-type');
    typeSelect.disabled = isEdit;

    if (isEdit) {
        document.getElementById('value-source-name').value = editData.name || '';
        document.getElementById('value-source-description').value = editData.description || '';
        typeSelect.value = editData.source_type || 'static';
        onValueSourceTypeChange();

        if (editData.source_type === 'static') {
            _setSlider('value-source-value', editData.value ?? 1.0);
        } else if (editData.source_type === 'animated') {
            document.getElementById('value-source-waveform').value = editData.waveform || 'sine';
            _setSlider('value-source-speed', editData.speed ?? 10);
            _setSlider('value-source-min-value', editData.min_value ?? 0);
            _setSlider('value-source-max-value', editData.max_value ?? 1);
        } else if (editData.source_type === 'audio') {
            _populateAudioSourceDropdown(editData.audio_source_id || '');
            document.getElementById('value-source-mode').value = editData.mode || 'rms';
            _setSlider('value-source-sensitivity', editData.sensitivity ?? 1.0);
            _setSlider('value-source-smoothing', editData.smoothing ?? 0.3);
        } else if (editData.source_type === 'adaptive_time') {
            _populateScheduleUI(editData.schedule);
            _setSlider('value-source-adaptive-min-value', editData.min_value ?? 0);
            _setSlider('value-source-adaptive-max-value', editData.max_value ?? 1);
        } else if (editData.source_type === 'adaptive_scene') {
            _populatePictureSourceDropdown(editData.picture_source_id || '');
            document.getElementById('value-source-scene-behavior').value = editData.scene_behavior || 'complement';
            _setSlider('value-source-scene-sensitivity', editData.sensitivity ?? 1.0);
            _setSlider('value-source-scene-smoothing', editData.smoothing ?? 0.3);
            _setSlider('value-source-adaptive-min-value', editData.min_value ?? 0);
            _setSlider('value-source-adaptive-max-value', editData.max_value ?? 1);
        }
    } else {
        document.getElementById('value-source-name').value = '';
        document.getElementById('value-source-description').value = '';
        typeSelect.value = 'static';
        onValueSourceTypeChange();
        _setSlider('value-source-value', 1.0);
        _setSlider('value-source-speed', 10);
        _setSlider('value-source-min-value', 0);
        _setSlider('value-source-max-value', 1);
        document.getElementById('value-source-waveform').value = 'sine';
        _populateAudioSourceDropdown('');
        document.getElementById('value-source-mode').value = 'rms';
        _setSlider('value-source-sensitivity', 1.0);
        _setSlider('value-source-smoothing', 0.3);
        // Adaptive defaults
        _populateScheduleUI([]);
        _populatePictureSourceDropdown('');
        document.getElementById('value-source-scene-behavior').value = 'complement';
        _setSlider('value-source-scene-sensitivity', 1.0);
        _setSlider('value-source-scene-smoothing', 0.3);
        _setSlider('value-source-adaptive-min-value', 0);
        _setSlider('value-source-adaptive-max-value', 1);
    }

    valueSourceModal.open();
    valueSourceModal.snapshot();
}

export async function closeValueSourceModal() {
    await valueSourceModal.close();
}

export function onValueSourceTypeChange() {
    const type = document.getElementById('value-source-type').value;
    document.getElementById('value-source-static-section').style.display = type === 'static' ? '' : 'none';
    document.getElementById('value-source-animated-section').style.display = type === 'animated' ? '' : 'none';
    document.getElementById('value-source-audio-section').style.display = type === 'audio' ? '' : 'none';
    document.getElementById('value-source-adaptive-time-section').style.display = type === 'adaptive_time' ? '' : 'none';
    document.getElementById('value-source-adaptive-scene-section').style.display = type === 'adaptive_scene' ? '' : 'none';
    document.getElementById('value-source-adaptive-range-section').style.display =
        (type === 'adaptive_time' || type === 'adaptive_scene') ? '' : 'none';

    // Populate audio dropdown when switching to audio type
    if (type === 'audio') {
        const select = document.getElementById('value-source-audio-source');
        if (select && select.options.length === 0) {
            _populateAudioSourceDropdown('');
        }
    }

    // Populate picture source dropdown when switching to scene type
    if (type === 'adaptive_scene') {
        _populatePictureSourceDropdown('');
    }
}

// ── Save ──────────────────────────────────────────────────────

export async function saveValueSource() {
    const id = document.getElementById('value-source-id').value;
    const name = document.getElementById('value-source-name').value.trim();
    const sourceType = document.getElementById('value-source-type').value;
    const description = document.getElementById('value-source-description').value.trim() || null;
    const errorEl = document.getElementById('value-source-error');

    if (!name) {
        errorEl.textContent = t('value_source.error.name_required');
        errorEl.style.display = '';
        return;
    }

    const payload = { name, source_type: sourceType, description };

    if (sourceType === 'static') {
        payload.value = parseFloat(document.getElementById('value-source-value').value);
    } else if (sourceType === 'animated') {
        payload.waveform = document.getElementById('value-source-waveform').value;
        payload.speed = parseFloat(document.getElementById('value-source-speed').value);
        payload.min_value = parseFloat(document.getElementById('value-source-min-value').value);
        payload.max_value = parseFloat(document.getElementById('value-source-max-value').value);
    } else if (sourceType === 'audio') {
        payload.audio_source_id = document.getElementById('value-source-audio-source').value;
        payload.mode = document.getElementById('value-source-mode').value;
        payload.sensitivity = parseFloat(document.getElementById('value-source-sensitivity').value);
        payload.smoothing = parseFloat(document.getElementById('value-source-smoothing').value);
    } else if (sourceType === 'adaptive_time') {
        payload.schedule = _getScheduleFromUI();
        if (payload.schedule.length < 2) {
            errorEl.textContent = t('value_source.error.schedule_min');
            errorEl.style.display = '';
            return;
        }
        payload.min_value = parseFloat(document.getElementById('value-source-adaptive-min-value').value);
        payload.max_value = parseFloat(document.getElementById('value-source-adaptive-max-value').value);
    } else if (sourceType === 'adaptive_scene') {
        payload.picture_source_id = document.getElementById('value-source-picture-source').value;
        payload.scene_behavior = document.getElementById('value-source-scene-behavior').value;
        payload.sensitivity = parseFloat(document.getElementById('value-source-scene-sensitivity').value);
        payload.smoothing = parseFloat(document.getElementById('value-source-scene-smoothing').value);
        payload.min_value = parseFloat(document.getElementById('value-source-adaptive-min-value').value);
        payload.max_value = parseFloat(document.getElementById('value-source-adaptive-max-value').value);
    }

    try {
        const method = id ? 'PUT' : 'POST';
        const url = id ? `/value-sources/${id}` : '/value-sources';
        const resp = await fetchWithAuth(url, {
            method,
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify(payload),
        });
        if (!resp.ok) {
            const err = await resp.json().catch(() => ({}));
            throw new Error(err.detail || `HTTP ${resp.status}`);
        }
        showToast(t(id ? 'value_source.updated' : 'value_source.created'), 'success');
        valueSourceModal.forceClose();
        await loadPictureSources();
    } catch (e) {
        errorEl.textContent = e.message;
        errorEl.style.display = '';
    }
}

// ── Edit ──────────────────────────────────────────────────────

export async function editValueSource(sourceId) {
    try {
        const resp = await fetchWithAuth(`/value-sources/${sourceId}`);
        if (!resp.ok) throw new Error('fetch failed');
        const data = await resp.json();
        await showValueSourceModal(data);
    } catch (e) {
        showToast(e.message, 'error');
    }
}

// ── Delete ────────────────────────────────────────────────────

export async function deleteValueSource(sourceId) {
    const confirmed = await showConfirm(t('value_source.delete.confirm'));
    if (!confirmed) return;

    try {
        const resp = await fetchWithAuth(`/value-sources/${sourceId}`, { method: 'DELETE' });
        if (!resp.ok) {
            const err = await resp.json().catch(() => ({}));
            throw new Error(err.detail || `HTTP ${resp.status}`);
        }
        showToast(t('value_source.deleted'), 'success');
        await loadPictureSources();
    } catch (e) {
        showToast(e.message, 'error');
    }
}

// ── Card rendering (used by streams.js) ───────────────────────

export function createValueSourceCard(src) {
    const typeIcons = { static: '📊', animated: '🔄', audio: '🎵', adaptive_time: '🕐', adaptive_scene: '🌤️' };
    const icon = typeIcons[src.source_type] || '🎚️';

    let propsHtml = '';
    if (src.source_type === 'static') {
        propsHtml = `<span class="stream-card-prop">${t('value_source.type.static')}: ${src.value ?? 1.0}</span>`;
    } else if (src.source_type === 'animated') {
        const waveLabel = src.waveform || 'sine';
        propsHtml = `
            <span class="stream-card-prop">${escapeHtml(waveLabel)}</span>
            <span class="stream-card-prop">${src.speed ?? 10} cpm</span>
            <span class="stream-card-prop">${src.min_value ?? 0}–${src.max_value ?? 1}</span>
        `;
    } else if (src.source_type === 'audio') {
        const audioSrc = _cachedAudioSources.find(a => a.id === src.audio_source_id);
        const audioName = audioSrc ? audioSrc.name : (src.audio_source_id || '-');
        const modeLabel = src.mode || 'rms';
        propsHtml = `
            <span class="stream-card-prop" title="${escapeHtml(t('value_source.audio_source'))}">${escapeHtml(audioName)}</span>
            <span class="stream-card-prop">${modeLabel.toUpperCase()}</span>
        `;
    } else if (src.source_type === 'adaptive_time') {
        const pts = (src.schedule || []).length;
        propsHtml = `
            <span class="stream-card-prop">${pts} ${t('value_source.schedule.points')}</span>
            <span class="stream-card-prop">${src.min_value ?? 0}–${src.max_value ?? 1}</span>
        `;
    } else if (src.source_type === 'adaptive_scene') {
        const ps = _cachedStreams.find(s => s.id === src.picture_source_id);
        const psName = ps ? ps.name : (src.picture_source_id || '-');
        propsHtml = `
            <span class="stream-card-prop">${escapeHtml(psName)}</span>
            <span class="stream-card-prop">${src.scene_behavior || 'complement'}</span>
        `;
    }

    return `
        <div class="template-card" data-id="${src.id}">
            <button class="card-remove-btn" onclick="deleteValueSource('${src.id}')" title="${t('common.delete')}">&#x2715;</button>
            <div class="template-card-header">
                <div class="template-name">${icon} ${escapeHtml(src.name)}</div>
            </div>
            <div class="stream-card-props">${propsHtml}</div>
            ${src.description ? `<div class="template-config" style="opacity:0.7;">${escapeHtml(src.description)}</div>` : ''}
            <div class="template-card-actions">
                <button class="btn btn-icon btn-secondary" onclick="editValueSource('${src.id}')" title="${t('common.edit')}">✏️</button>
            </div>
        </div>
    `;
}

// ── Helpers ───────────────────────────────────────────────────

function _setSlider(id, value) {
    const slider = document.getElementById(id);
    if (slider) {
        slider.value = value;
        const display = document.getElementById(id + '-display');
        if (display) display.textContent = value;
    }
}

function _populateAudioSourceDropdown(selectedId) {
    const select = document.getElementById('value-source-audio-source');
    if (!select) return;
    const mono = _cachedAudioSources.filter(s => s.source_type === 'mono');
    select.innerHTML = mono.map(s =>
        `<option value="${s.id}"${s.id === selectedId ? ' selected' : ''}>${escapeHtml(s.name)}</option>`
    ).join('');
}

// ── Adaptive helpers ──────────────────────────────────────────

function _populatePictureSourceDropdown(selectedId) {
    const select = document.getElementById('value-source-picture-source');
    if (!select) return;
    select.innerHTML = _cachedStreams.map(s =>
        `<option value="${s.id}"${s.id === selectedId ? ' selected' : ''}>${escapeHtml(s.name)}</option>`
    ).join('');
}

export function addSchedulePoint(time = '', value = 1.0) {
    const list = document.getElementById('value-source-schedule-list');
    if (!list) return;
    const row = document.createElement('div');
    row.className = 'schedule-row';
    row.innerHTML = `
        <input type="time" class="schedule-time" value="${time || '12:00'}">
        <input type="range" class="schedule-value" min="0" max="1" step="0.01" value="${value}"
            oninput="this.nextElementSibling.textContent = this.value">
        <span class="schedule-value-display">${value}</span>
        <button type="button" class="btn btn-icon btn-danger btn-sm" onclick="this.parentElement.remove()">&#x2715;</button>
    `;
    list.appendChild(row);
}

function _getScheduleFromUI() {
    const rows = document.querySelectorAll('#value-source-schedule-list .schedule-row');
    const schedule = [];
    rows.forEach(row => {
        const time = row.querySelector('.schedule-time').value;
        const value = parseFloat(row.querySelector('.schedule-value').value);
        if (time) schedule.push({ time, value });
    });
    return schedule;
}

function _populateScheduleUI(schedule) {
    const list = document.getElementById('value-source-schedule-list');
    if (!list) return;
    list.innerHTML = '';
    if (!schedule || schedule.length === 0) {
        // Default: morning bright, night dim
        addSchedulePoint('08:00', 1.0);
        addSchedulePoint('22:00', 0.3);
    } else {
        schedule.forEach(p => addSchedulePoint(p.time, p.value));
    }
}