/**
 * AI Quick Quote widget — floating panel for generating quick phone/walk-in estimates.
 * Follows the same IIFE + sessionStorage pattern as ai-help-widget.js.
 */
(function () {
    'use strict';

    const SESSION_KEY = 'qqWidgetState';

    const el = {
        widget:       document.getElementById('qq-widget'),
        btn:          document.getElementById('qq-btn'),
        panel:        document.getElementById('qq-panel'),
        closeBtn:     document.getElementById('qq-close'),
        token:        document.getElementById('qq-token'),

        // Step 1
        stepInput:    document.getElementById('qq-step-input'),
        description:  document.getElementById('qq-description'),
        qty:          document.getElementById('qq-qty'),
        coats:        document.getElementById('qq-coats'),
        analyzeBtn:   document.getElementById('qq-analyze-btn'),
        inputError:   document.getElementById('qq-input-error'),

        // Step 2
        stepResults:  document.getElementById('qq-step-results'),
        resDesc:      document.getElementById('qq-res-description'),
        resSqft:      document.getElementById('qq-res-sqft'),
        resComplexity:document.getElementById('qq-res-complexity'),
        resMinutes:   document.getElementById('qq-res-minutes'),
        resPrice:     document.getElementById('qq-res-price'),
        resOven:      document.getElementById('qq-res-oven'),
        resConfidence:document.getElementById('qq-res-confidence'),
        resReasoning: document.getElementById('qq-res-reasoning'),
        powderSection:document.getElementById('qq-powder-section'),
        powderList:   document.getElementById('qq-powder-list'),
        reference:    document.getElementById('qq-reference'),
        backBtn:      document.getElementById('qq-back-btn'),
        saveBtn:      document.getElementById('qq-save-btn'),
        saveError:    document.getElementById('qq-save-error'),

        // Shared
        loading:      document.getElementById('qq-loading'),
    };

    if (!el.widget) return; // partial not rendered (unauthenticated)

    // ── State ────────────────────────────────────────────────────────────────

    let isOpen = false;
    let lastResult = null; // AiQuickQuoteResult from last successful Analyze call

    function saveState() {
        try {
            sessionStorage.setItem(SESSION_KEY, JSON.stringify({ isOpen }));
        } catch (_) { /* private browsing */ }
    }

    function restoreState() {
        try {
            const raw = sessionStorage.getItem(SESSION_KEY);
            if (!raw) return;
            const state = JSON.parse(raw);
            if (state.isOpen) openPanel(false);
        } catch (_) { /* corrupt state */ }
    }

    // ── Panel open/close ─────────────────────────────────────────────────────

    function openPanel(animate) {
        isOpen = true;
        el.panel.removeAttribute('hidden');
        el.btn.setAttribute('aria-expanded', 'true');
        if (animate) el.panel.style.animation = 'none'; // instant on restore
        saveState();
    }

    function closePanel() {
        isOpen = false;
        el.panel.setAttribute('hidden', '');
        el.btn.setAttribute('aria-expanded', 'false');
        saveState();
    }

    el.btn.addEventListener('click', () => isOpen ? closePanel() : openPanel(true));
    el.closeBtn.addEventListener('click', closePanel);

    // Close on outside click
    document.addEventListener('mousedown', function (e) {
        if (isOpen && !el.widget.contains(e.target)) closePanel();
    });

    // ── Step navigation ──────────────────────────────────────────────────────

    function showStep(step) {
        el.stepInput.classList.toggle('d-none', step !== 'input');
        el.stepResults.classList.toggle('d-none', step !== 'results');
        el.loading.classList.add('d-none');
    }

    el.backBtn.addEventListener('click', () => {
        clearErrors();
        showStep('input');
    });

    // ── Analyze ──────────────────────────────────────────────────────────────

    el.analyzeBtn.addEventListener('click', runAnalysis);
    el.description.addEventListener('keydown', function (e) {
        if (e.key === 'Enter' && e.ctrlKey) runAnalysis();
    });

    async function runAnalysis() {
        clearErrors();

        const description = el.description.value.trim();
        if (!description) {
            showInputError('Please describe what the customer needs.');
            return;
        }

        setLoading(true);

        try {
            const response = await post('/AiQuickQuote/Analyze', {
                description,
                quantity:  parseInt(el.qty.value, 10) || 1,
                coatCount: parseInt(el.coats.value, 10) || 1
            });

            if (!response.success) {
                showInputError(response.errorMessage || 'Analysis failed. Please try again.');
                return;
            }

            lastResult = response;
            populateResults(response);
            showStep('results');

        } catch (err) {
            showInputError('Could not reach the server. Please try again.');
            console.error('[QuickQuote] Analyze error:', err);
        } finally {
            setLoading(false);
        }
    }

    function populateResults(r) {
        el.resDesc.textContent = r.description || '—';
        el.resSqft.textContent = r.surfaceAreaSqFt ? r.surfaceAreaSqFt.toFixed(1) + ' sqft' : '—';
        el.resComplexity.textContent = r.complexity || '—';
        el.resMinutes.textContent = r.estimatedMinutes ? r.estimatedMinutes + ' min' : '—';
        el.resPrice.textContent = formatCurrency(r.estimatedTotal || r.estimatedUnitPrice);

        const ovenCost = r.breakdown?.ovenCost;
        const ovenMin  = r.breakdown?.ovenCycleMinutes;
        if (ovenCost && ovenCost > 0) {
            el.resOven.textContent = `incl. oven 1 batch ${ovenMin ? ovenMin + ' min' : ''}: ${formatCurrency(ovenCost)}`;
        } else {
            el.resOven.textContent = '';
        }

        el.resReasoning.textContent = r.reasoning || '';

        // Confidence badge
        const conf = (r.confidence || 'Medium').toLowerCase();
        el.resConfidence.textContent = r.confidence || 'Medium';
        el.resConfidence.className = 'badge ' + (
            conf === 'high'   ? 'bg-success' :
            conf === 'medium' ? 'bg-warning text-dark' :
                                'bg-danger'
        );

        // Powder stock
        if (r.powderMatches && r.powderMatches.length > 0) {
            el.powderList.innerHTML = r.powderMatches.map(buildPowderBadge).join('');
            el.powderSection.classList.remove('d-none');
        } else {
            el.powderSection.classList.add('d-none');
        }
    }

    function buildPowderBadge(match) {
        if (match.hasInventoryMatch) {
            const icon  = match.isInStock ? '✓' : '✗';
            const cls   = match.isInStock ? 'text-success border-success' : 'text-danger border-danger';
            const label = match.isInStock
                ? `In stock — ${match.quantityOnHand.toFixed(1)} lbs`
                : 'Not in stock';
            const name  = match.inventoryItemName || match.detectedColorName;
            return `<span class="qq-powder-badge ${cls}" title="${escHtml(label)}">
                        ${icon} ${escHtml(name)}
                        <small class="opacity-75">${escHtml(label)}</small>
                    </span>`;
        }
        return `<span class="qq-powder-badge text-secondary border-secondary" title="Not found in inventory">
                    ? ${escHtml(match.detectedColorName)}
                    <small class="opacity-75">Not in inventory</small>
                </span>`;
    }

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

    el.saveBtn.addEventListener('click', runSave);

    async function runSave() {
        clearErrors();
        if (!lastResult) return;

        const reference = el.reference.value.trim();
        if (!reference) {
            showSaveError('Enter a reference (caller name or memo) before saving.');
            return;
        }

        el.saveBtn.disabled = true;
        el.saveBtn.innerHTML = '<span class="spinner-border spinner-border-sm me-1"></span> Saving…';

        try {
            const body = {
                reference,
                originalDescription: el.description.value.trim(),
                aiDescription:       lastResult.description,
                surfaceAreaSqFt:     lastResult.surfaceAreaSqFt,
                complexity:          lastResult.complexity,
                estimatedMinutes:    lastResult.estimatedMinutes,
                requiresPreheat:     lastResult.requiresPreheat,
                preheatMinutes:      lastResult.preheatMinutes,
                quantity:            parseInt(el.qty.value, 10) || 1,
                coatCount:           parseInt(el.coats.value, 10) || 1,
                estimatedUnitPrice:  lastResult.estimatedUnitPrice,
                materialCost:        lastResult.breakdown?.materialCost ?? 0,
                laborCost:           lastResult.breakdown?.laborCost ?? 0,
                ovenBatchCost:       lastResult.breakdown?.ovenCost ?? 0,
                ovenCycleMinutes:    lastResult.breakdown?.ovenCycleMinutes ?? 50
            };

            const response = await post('/AiQuickQuote/Save', body);

            if (response.success && response.redirectUrl) {
                closePanel();
                window.location.href = response.redirectUrl;
            } else {
                showSaveError(response.errorMessage || 'Save failed. Please try again.');
            }

        } catch (err) {
            showSaveError('Could not reach the server. Please try again.');
            console.error('[QuickQuote] Save error:', err);
        } finally {
            el.saveBtn.disabled = false;
            el.saveBtn.innerHTML = '<i class="bi bi-floppy me-1"></i> Save as Draft Quote';
        }
    }

    // ── Utilities ────────────────────────────────────────────────────────────

    async function post(url, data) {
        const res = await fetch(url, {
            method:  'POST',
            headers: {
                'Content-Type':            'application/json',
                'RequestVerificationToken': el.token.value
            },
            body: JSON.stringify(data)
        });
        if (!res.ok) throw new Error(`HTTP ${res.status}`);
        return res.json();
    }

    function setLoading(on) {
        el.loading.classList.toggle('d-none', !on);
        el.analyzeBtn.disabled = on;
        el.analyzeBtn.innerHTML = on
            ? '<span class="spinner-border spinner-border-sm me-1"></span> Analyzing…'
            : '<i class="bi bi-lightning-charge-fill me-1"></i> Get Estimate';
    }

    function showInputError(msg) {
        el.inputError.textContent = msg;
        el.inputError.classList.remove('d-none');
    }

    function showSaveError(msg) {
        el.saveError.textContent = msg;
        el.saveError.classList.remove('d-none');
    }

    function clearErrors() {
        el.inputError.classList.add('d-none');
        el.saveError.classList.add('d-none');
    }

    function formatCurrency(value) {
        if (!value && value !== 0) return '—';
        return new Intl.NumberFormat('en-US', { style: 'currency', currency: 'USD' }).format(value);
    }

    function escHtml(str) {
        return (str || '').replace(/[&<>"']/g, c => ({
            '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;', "'": '&#39;'
        }[c]));
    }

    // ── Init ─────────────────────────────────────────────────────────────────

    showStep('input');
    restoreState();

})();