// static/admin/js/vendor-theme.js
/**
 * Vendor Theme Management Component
 * Follows the established Alpine.js pattern from FRONTEND_ALPINE_PAGE_TEMPLATE.md
 */

const THEME_LOG_LEVEL = 3;

const themeLog = {
    error: (...args) => THEME_LOG_LEVEL >= 1 && console.error('❌ [THEME ERROR]', ...args),
    warn: (...args) => THEME_LOG_LEVEL >= 2 && console.warn('⚠️ [THEME WARN]', ...args),
    info: (...args) => THEME_LOG_LEVEL >= 3 && console.info('ℹ️ [THEME INFO]', ...args),
    debug: (...args) => THEME_LOG_LEVEL >= 4 && console.log('🔍 [THEME DEBUG]', ...args)
};

// Theme presets
const THEME_PRESETS = {
    modern: {
        colors: {
            primary: "#6366f1",
            secondary: "#8b5cf6",
            accent: "#ec4899"
        },
        fonts: {
            heading: "Inter, sans-serif",
            body: "Inter, sans-serif"
        },
        layout: {
            style: "grid",
            header: "fixed"
        }
    },
    classic: {
        colors: {
            primary: "#1e40af",
            secondary: "#7c3aed",
            accent: "#dc2626"
        },
        fonts: {
            heading: "Georgia, serif",
            body: "Arial, sans-serif"
        },
        layout: {
            style: "list",
            header: "static"
        }
    },
    minimal: {
        colors: {
            primary: "#000000",
            secondary: "#404040",
            accent: "#666666"
        },
        fonts: {
            heading: "Helvetica, sans-serif",
            body: "Helvetica, sans-serif"
        },
        layout: {
            style: "grid",
            header: "transparent"
        }
    },
    vibrant: {
        colors: {
            primary: "#f59e0b",
            secondary: "#ef4444",
            accent: "#8b5cf6"
        },
        fonts: {
            heading: "Poppins, sans-serif",
            body: "Open Sans, sans-serif"
        },
        layout: {
            style: "masonry",
            header: "fixed"
        }
    }
};

function vendorThemeData() {
    return {
        // ✅ CRITICAL: Inherit base layout functionality
        ...data(),

        // ✅ CRITICAL: Set page identifier
        currentPage: 'vendor-theme',

        // Page state
        loading: false,
        saving: false,
        vendor: null,
        vendorCode: window.location.pathname.split('/')[3], // Extract from /admin/vendors/{code}/theme

        // Theme data
        themeData: {
            colors: {
                primary: "#6366f1",
                secondary: "#8b5cf6",
                accent: "#ec4899"
            },
            fonts: {
                heading: "Inter, sans-serif",
                body: "Inter, sans-serif"
            },
            layout: {
                style: "grid",
                header: "fixed"
            },
            custom_css: ""
        },

        originalTheme: null, // For detecting changes

        // ✅ CRITICAL: Proper initialization with guard
        async init() {
            themeLog.info('=== VENDOR THEME PAGE INITIALIZING ===');

            // Prevent multiple initializations
            if (window._vendorThemeInitialized) {
                themeLog.warn('Page already initialized, skipping...');
                return;
            }
            window._vendorThemeInitialized = true;

            // Load data
            await this.loadVendor();
            await this.loadTheme();

            themeLog.info('=== VENDOR THEME PAGE INITIALIZATION COMPLETE ===');
        },

        // Load vendor info
        async loadVendor() {
            themeLog.info('Loading vendor:', this.vendorCode);

            try {
                // ✅ CRITICAL: Use lowercase apiClient
                const response = await apiClient.get(`/api/v1/admin/vendors/${this.vendorCode}`);
                this.vendor = response;
                themeLog.info('Vendor loaded:', this.vendor.name);
            } catch (error) {
                themeLog.error('Failed to load vendor:', error);
                Utils.showToast('Failed to load vendor', 'error');
            }
        },

        // Load theme configuration
        async loadTheme() {
            themeLog.info('Loading theme...');
            this.loading = true;

            try {
                const startTime = Date.now();

                // Get vendor's theme config from vendor object
                if (this.vendor && this.vendor.theme_config) {
                    this.themeData = {
                        colors: this.vendor.theme_config.colors || this.themeData.colors,
                        fonts: this.vendor.theme_config.fonts || this.themeData.fonts,
                        layout: this.vendor.theme_config.layout || this.themeData.layout,
                        custom_css: this.vendor.theme_config.custom_css || ""
                    };
                } else {
                    themeLog.info('No theme config found, using defaults');
                }

                // Store original for change detection
                this.originalTheme = JSON.parse(JSON.stringify(this.themeData));

                const duration = Date.now() - startTime;
                themeLog.info(`Theme loaded in ${duration}ms`, this.themeData);

            } catch (error) {
                themeLog.error('Failed to load theme:', error);
                Utils.showToast('Failed to load theme', 'error');
            } finally {
                this.loading = false;
            }
        },

        // Save theme configuration
        async saveTheme() {
            themeLog.info('Saving theme...');
            this.saving = true;

            try {
                const startTime = Date.now();

                // Update vendor with new theme_config
                const updateData = {
                    theme_config: this.themeData
                };

                const response = await apiClient.put(
                    `/api/v1/admin/vendors/${this.vendorCode}`,
                    updateData
                );

                const duration = Date.now() - startTime;
                themeLog.info(`Theme saved in ${duration}ms`);

                // Update vendor data
                this.vendor = response;
                this.originalTheme = JSON.parse(JSON.stringify(this.themeData));

                Utils.showToast('Theme saved successfully', 'success');

            } catch (error) {
                themeLog.error('Failed to save theme:', error);
                Utils.showToast('Failed to save theme', 'error');
            } finally {
                this.saving = false;
            }
        },

        // Apply preset theme
        applyPreset(presetName) {
            themeLog.info('Applying preset:', presetName);

            if (!THEME_PRESETS[presetName]) {
                themeLog.error('Unknown preset:', presetName);
                return;
            }

            const preset = THEME_PRESETS[presetName];

            // Apply preset values
            this.themeData.colors = { ...preset.colors };
            this.themeData.fonts = { ...preset.fonts };
            this.themeData.layout = { ...preset.layout };

            Utils.showToast(`Applied ${presetName} theme preset`, 'success');
        },

        // Reset to default theme
        resetToDefault() {
            themeLog.info('Resetting to default theme');

            // Confirm with user
            if (!confirm('Are you sure you want to reset to the default theme? This will discard all customizations.')) {
                return;
            }

            this.themeData = {
                colors: {
                    primary: "#6366f1",
                    secondary: "#8b5cf6",
                    accent: "#ec4899"
                },
                fonts: {
                    heading: "Inter, sans-serif",
                    body: "Inter, sans-serif"
                },
                layout: {
                    style: "grid",
                    header: "fixed"
                },
                custom_css: ""
            };

            Utils.showToast('Theme reset to default', 'info');
        },

        // Check if theme has unsaved changes
        hasChanges() {
            if (!this.originalTheme) return false;
            return JSON.stringify(this.themeData) !== JSON.stringify(this.originalTheme);
        },

        // Format date helper
        formatDate(dateString) {
            if (!dateString) return '-';
            return Utils.formatDate(dateString);
        }
    };
}

themeLog.info('Vendor theme module loaded');