/**
 * Variant Creation Module
 * 
 * Handles variant creation UI and API calls
 */

export class VariantCreation {
    constructor() {
        this.modal = null;
        this.assetId = null;
        this.init();
    }

    init() {
        this.setupCreateButtons();
        this.setupModal();
        this.setupPresets();
        this.setupSubmit();
    }

    setupCreateButtons() {
        document.addEventListener('click', (e) => {
            const button = e.target.closest('[data-create-variant]');
            if (!button) return;

            e.preventDefault();
            this.assetId = button.closest('[data-asset-id]')?.dataset.assetId || 
                          window.location.pathname.split('/').pop();
            this.showModal();
        });
    }

    setupModal() {
        // Create or get modal
        this.modal = document.getElementById('variant-create-modal');
        if (!this.modal) {
            console.warn('Variant creation modal not found');
            return;
        }

        // Setup close handlers
        this.modal.querySelectorAll('[data-close-variant-modal]').forEach(el => {
            el.addEventListener('click', () => this.closeModal());
        });

        // Setup quality slider
        const qualitySlider = this.modal.querySelector('#variant-quality');
        const qualityValue = this.modal.querySelector('#quality-value');
        if (qualitySlider && qualityValue) {
            qualitySlider.addEventListener('input', (e) => {
                qualityValue.textContent = e.target.value;
            });
        }
    }

    setupPresets() {
        const presets = {
            '1200w': { variant: '1200w', width: 1200, quality: 85 },
            '800w': { variant: '800w', width: 800, quality: 85 },
            'thumb@1x': { variant: 'thumb@1x', width: 200, quality: 80 },
            'thumb@2x': { variant: 'thumb@2x', width: 400, quality: 80 },
        };

        this.modal?.querySelectorAll('[data-preset]').forEach(button => {
            button.addEventListener('click', () => {
                const preset = presets[button.dataset.preset];
                if (preset) {
                    this.modal.querySelector('#variant-name').value = preset.variant;
                    this.modal.querySelector('#variant-width').value = preset.width;
                    this.modal.querySelector('#variant-quality').value = preset.quality;
                    this.modal.querySelector('#quality-value').textContent = preset.quality;
                }
            });
        });
    }

    setupSubmit() {
        const submitButton = this.modal?.querySelector('#variant-create-submit');
        if (!submitButton) return;

        submitButton.addEventListener('click', async () => {
            await this.createVariant();
        });
    }

    showModal() {
        if (!this.modal) return;

        // Reset form
        const form = this.modal.querySelector('#variant-create-form');
        if (form) {
            form.reset();
            this.modal.querySelector('#variant-quality').value = 85;
            this.modal.querySelector('#quality-value').textContent = '85';
        }

        this.modal.style.display = 'block';
    }

    closeModal() {
        if (this.modal) {
            this.modal.style.display = 'none';
        }
    }

    async createVariant() {
        if (!this.assetId) {
            console.error('Asset ID not set');
            return;
        }

        const form = this.modal.querySelector('#variant-create-form');
        if (!form) return;

        const formData = new FormData(form);
        const data = {
            variant: formData.get('variant'),
            width: formData.get('width') ? parseInt(formData.get('width')) : null,
            height: formData.get('height') ? parseInt(formData.get('height')) : null,
            quality: formData.get('quality') ? parseInt(formData.get('quality')) : null,
        };

        // Validate
        if (!data.variant) {
            if (window.Toast) {
                window.Toast.error('Variant name is required');
            } else {
                alert('Variant name is required');
            }
            return;
        }

        const submitButton = this.modal.querySelector('#variant-create-submit');
        const originalText = submitButton.textContent;
        submitButton.disabled = true;
        submitButton.textContent = 'Creating...';

        try {
            const response = await fetch(`/api/v1/assets/${this.assetId}/variants`, {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json',
                    'X-Requested-With': 'XMLHttpRequest',
                },
                body: JSON.stringify(data),
            });

            if (!response.ok) {
                const errorData = await response.json().catch(() => ({ error: 'Unknown error' }));
                throw new Error(errorData.error || `HTTP ${response.status}`);
            }

            const result = await response.json();

            if (window.Toast) {
                window.Toast.success('Variant creation queued. It will be processed shortly.');
            } else {
                alert('Variant creation queued successfully');
            }

            this.closeModal();

            // Reload page after a short delay to show new variant
            setTimeout(() => {
                window.location.reload();
            }, 1500);
        } catch (error) {
            console.error('Failed to create variant:', error);
            
            if (window.Toast) {
                window.Toast.error(`Failed to create variant: ${error.message}`);
            } else {
                alert(`Failed to create variant: ${error.message}`);
            }
        } finally {
            submitButton.disabled = false;
            submitButton.textContent = originalText;
        }
    }
}

// Auto-initialize
document.addEventListener('DOMContentLoaded', () => {
    new VariantCreation();
});