window.Results = {
    currentImageUrl: null,

    render: function (result, file) {
        this._hideAll();
        Utils.$('#results-data').classList.remove('hidden');

        if (file) {
            this.showImagePreview(file);
        }

        this.renderOverallResult(result);
        this.renderExtractionInfo(result);
        this.renderFields(result);
        this.renderChecks(result.checks || {});
        this.renderConfidence(result.confidence || {}, result.doc_type);
        this.renderRawText(result.raw_text || []);
        this.renderMachineData(result);
    },

    showImagePreview: function (file) {
        if (this.currentImageUrl) {
            URL.revokeObjectURL(this.currentImageUrl);
        }
        var container = Utils.$('#image-preview-container');
        container.classList.remove('hidden');
        this.currentImageUrl = URL.createObjectURL(file);
        Utils.$('#image-preview').src = this.currentImageUrl;
    },

    hideImagePreview: function () {
        Utils.$('#image-preview-container').classList.add('hidden');
    },

    renderOverallResult: function (result) {
        var banner = Utils.$('#overall-result-banner');
        var overall = result.overall_result || 'unknown';
        banner.className = 'overall-result-banner result-' + overall;

        var icon = overall === 'pass' ? '✓' : overall === 'fail' ? '✗' : '⚠';
        var label = overall === 'pass' ? 'PASS' : overall === 'fail' ? 'FAIL' : 'INCONCLUSIVE';
        banner.innerHTML = '<span class="result-icon">' + icon + '</span> ' + label;
    },

    renderExtractionInfo: function (result) {
        var el = Utils.$('#extraction-info');
        var parts = [];
        if (result.doc_type) {
            parts.push('<span class="info-tag">' + Utils.docTypeLabel(result.doc_type) + '</span>');
        }
        if (result.extraction_method) {
            parts.push('<span class="info-tag method">' + result.extraction_method + '</span>');
        }
        el.innerHTML = parts.join(' ');
    },

    renderFields: function (result) {
        var tbody = Utils.$('#fields-table tbody');
        tbody.innerHTML = '';

        var fields = result.fields || {};
        var fieldOrder = Utils.fieldsForDocType(result.doc_type);

        for (var i = 0; i < fieldOrder.length; i++) {
            var key = fieldOrder[i];
            var value = fields[key];
            var tr = document.createElement('tr');

            var tdLabel = document.createElement('td');
            tdLabel.textContent = Utils.fieldLabel(key);

            var tdValue = document.createElement('td');
            if (value) {
                tdValue.textContent = value;
            } else {
                tdValue.textContent = 'Not detected';
                tdValue.className = 'field-missing';
            }

            tr.appendChild(tdLabel);
            tr.appendChild(tdValue);
            tbody.appendChild(tr);
        }
    },

    renderChecks: function (checks) {
        var section = Utils.$('#checks-section');
        section.innerHTML = '';

        var checkOrder = ['image_quality', 'id_number_valid', 'barcode_valid', 'mrz_valid', 'data_crosscheck', 'dob_crosscheck', 'gender_crosscheck'];

        for (var i = 0; i < checkOrder.length; i++) {
            var key = checkOrder[i];
            var val = checks[key];
            if (val === undefined) continue;

            var span = document.createElement('span');

            if (val === 'passed') {
                span.className = 'validation-check pass';
                span.innerHTML = '&#10003; ' + Utils.checkLabel(key);
            } else if (val === 'failed') {
                span.className = 'validation-check fail';
                span.innerHTML = '&#10007; ' + Utils.checkLabel(key);
            } else {
                span.className = 'validation-check na';
                span.innerHTML = '&mdash; ' + Utils.checkLabel(key);
            }

            section.appendChild(span);
        }
    },

    renderConfidence: function (confidence, docType) {
        var section = Utils.$('#confidence-section');
        section.innerHTML = '';

        var fieldOrder = Utils.fieldsForDocType(docType);

        for (var i = 0; i < fieldOrder.length; i++) {
            var key = fieldOrder[i];
            var val = confidence[key];
            if (val === undefined || val === null) continue;

            var row = document.createElement('div');
            row.className = 'confidence-row';

            var label = document.createElement('span');
            label.className = 'confidence-label';
            label.textContent = Utils.fieldLabel(key);

            var bar = document.createElement('div');
            bar.className = 'confidence-bar';

            var fill = document.createElement('div');
            fill.className = 'confidence-fill ' + Utils.confidenceLevel(val);
            fill.style.width = Utils.formatConfidence(val);
            fill.textContent = Utils.formatConfidence(val);

            bar.appendChild(fill);
            row.appendChild(label);
            row.appendChild(bar);
            section.appendChild(row);
        }
    },

    renderRawText: function (rawText) {
        var content = Utils.$('#raw-text-content');
        content.innerHTML = '';
        for (var i = 0; i < rawText.length; i++) {
            var line = document.createElement('div');
            line.textContent = rawText[i];
            content.appendChild(line);
        }
    },

    renderMachineData: function (result) {
        var section = Utils.$('#machine-data-section');
        var content = Utils.$('#machine-data-content');
        content.innerHTML = '';

        var data = result.barcode_data || result.mrz_data;
        if (!data) {
            section.classList.add('hidden');
            return;
        }

        section.classList.remove('hidden');
        var label = result.barcode_data ? 'Barcode Data' : 'MRZ Data';
        Utils.$('#machine-data-section summary').textContent = label;

        var pre = document.createElement('pre');
        pre.textContent = JSON.stringify(data, null, 2);
        content.appendChild(pre);
    },

    showLoading: function (file) {
        this._hideAll();
        if (file) {
            this.showImagePreview(file);
        }
        Utils.$('#results-loading').classList.remove('hidden');
        this._startTimer();
    },

    hideLoading: function () {
        Utils.$('#results-loading').classList.add('hidden');
        this._stopTimer();
    },

    showEmpty: function () {
        this._hideAll();
        Utils.$('#results-empty').classList.remove('hidden');
    },

    showError: function (message) {
        this._hideAll();
        Utils.$('#results-error').classList.remove('hidden');
        Utils.$('#error-message').textContent = message;
    },

    renderSerial: function (result, file) {
        this._hideAll();
        Utils.$('#serial-results').classList.remove('hidden');

        if (file) this.showImagePreview(file);

        // Banner
        var banner = Utils.$('#serial-result-banner');
        var hasSerial = !!result.serial_number;
        banner.className = 'overall-result-banner ' + (hasSerial ? 'result-pass' : 'result-fail');
        banner.innerHTML = hasSerial
            ? '<span class="result-icon">&#10003;</span> SERIAL NUMBER FOUND'
            : '<span class="result-icon">&#10007;</span> ' + (result.failure_reason || 'NO SERIAL NUMBER DETECTED');

        // Failure guidance
        var failGuidance = Utils.$('#serial-fail-guidance');
        if (!hasSerial) {
            failGuidance.classList.remove('hidden');
            failGuidance.innerHTML = '';
            var tips = [];
            if (result.quality && result.quality.issues && result.quality.issues.length > 0) {
                for (var q = 0; q < result.quality.issues.length; q++) {
                    tips.push(result.quality.issues[q]);
                }
            }
            if (result.quality && !result.quality.usable) {
                tips.push('Image quality is too low for reliable extraction');
            }
            if (tips.length === 0) {
                tips.push('Try better lighting, hold the label steady, or move closer');
            }
            var ul = document.createElement('ul');
            for (var t = 0; t < tips.length; t++) {
                var li = document.createElement('li');
                li.textContent = tips[t];
                ul.appendChild(li);
            }
            failGuidance.appendChild(ul);
        } else {
            failGuidance.classList.add('hidden');
            failGuidance.innerHTML = '';
        }

        // Cropped image preview
        var cropContainer = Utils.$('#serial-crop-container');
        if (result.cropped_image) {
            cropContainer.classList.remove('hidden');
            Utils.$('#serial-crop-preview').src = 'data:image/jpeg;base64,' + result.cropped_image;
        } else {
            cropContainer.classList.add('hidden');
        }

        // Fields table
        var tbody = Utils.$('#serial-fields-table tbody');
        tbody.innerHTML = '';

        var confidenceClass = '';
        if (result.confidence === 'high') confidenceClass = 'confidence-high';
        else if (result.confidence === 'medium') confidenceClass = 'confidence-medium';
        else if (result.confidence === 'low') confidenceClass = 'confidence-low';

        var rows = [
            ['Serial Number', result.serial_number || 'Not detected', !result.serial_number ? 'field-missing' : ''],
            ['Extraction Source', result.extraction_source || '-', ''],
            ['Confidence', result.confidence || '-', confidenceClass],
        ];

        for (var i = 0; i < rows.length; i++) {
            var tr = document.createElement('tr');
            var tdLabel = document.createElement('td');
            tdLabel.textContent = rows[i][0];
            var tdValue = document.createElement('td');
            tdValue.textContent = rows[i][1];
            if (rows[i][2]) tdValue.className = rows[i][2];
            tr.appendChild(tdLabel);
            tr.appendChild(tdValue);
            tbody.appendChild(tr);
        }

        // Validation details (styled pills instead of raw JSON)
        var valContent = Utils.$('#serial-validation-content');
        valContent.innerHTML = '';
        if (result.validation) {
            var validPill = document.createElement('span');
            validPill.className = 'validation-pill ' + (result.validation.valid ? 'pill-pass' : 'pill-fail');
            validPill.textContent = result.validation.valid ? 'Valid' : 'Invalid';
            valContent.appendChild(validPill);

            if (result.validation.prefix_match) {
                var prefixPill = document.createElement('span');
                prefixPill.className = 'validation-pill pill-info';
                prefixPill.textContent = result.validation.prefix_match;
                valContent.appendChild(prefixPill);
            }

            if (result.validation.issues && result.validation.issues.length > 0) {
                for (var j = 0; j < result.validation.issues.length; j++) {
                    var issuePill = document.createElement('span');
                    issuePill.className = 'validation-pill pill-warn';
                    issuePill.textContent = result.validation.issues[j];
                    valContent.appendChild(issuePill);
                }
            }
        } else {
            valContent.textContent = 'No validation data';
        }
    },

    _hideAll: function () {
        Utils.$('#results-empty').classList.add('hidden');
        Utils.$('#results-loading').classList.add('hidden');
        Utils.$('#results-data').classList.add('hidden');
        Utils.$('#serial-results').classList.add('hidden');
        Utils.$('#results-error').classList.add('hidden');
        Utils.$('#image-preview-container').classList.add('hidden');
        this._stopTimer();
    },

    _timerInterval: null,
    _timerStart: 0,

    _startTimer: function () {
        this._timerStart = performance.now();
        var el = Utils.$('#elapsed-timer');
        var self = this;
        el.textContent = 'Elapsed: 0s';
        this._timerInterval = setInterval(function () {
            var secs = Math.floor((performance.now() - self._timerStart) / 1000);
            el.textContent = 'Elapsed: ' + secs + 's';
        }, 1000);
    },

    _stopTimer: function () {
        if (this._timerInterval) {
            clearInterval(this._timerInterval);
            this._timerInterval = null;
        }
    },
};