// static/vendor/js/settings.js
/**
 * Vendor settings management page logic
 * Configure vendor preferences and integrations
 */

const vendorSettingsLog = window.LogConfig.loggers.vendorSettings ||
    window.LogConfig.createLogger('vendorSettings', false);

vendorSettingsLog.info('Loading...');

function vendorSettings() {
    vendorSettingsLog.info('vendorSettings() called');

    return {
        // Inherit base layout state
        ...data(),

        // Set page identifier
        currentPage: 'settings',

        // Loading states
        loading: true,
        error: '',
        saving: false,

        // Settings data from API
        settings: null,

        // Active section
        activeSection: 'general',

        // Sections for navigation
        sections: [
            { id: 'general', label: 'General', icon: 'cog' },
            { id: 'business', label: 'Business Info', icon: 'office-building' },
            { id: 'localization', label: 'Localization', icon: 'globe' },
            { id: 'marketplace', label: 'Marketplace', icon: 'shopping-cart' },
            { id: 'invoices', label: 'Invoices', icon: 'document-text' },
            { id: 'branding', label: 'Branding', icon: 'color-swatch' },
            { id: 'domains', label: 'Domains', icon: 'globe-alt' },
            { id: 'api', label: 'API & Payments', icon: 'key' },
            { id: 'notifications', label: 'Notifications', icon: 'bell' },
            { id: 'email', label: 'Email', icon: 'envelope' }
        ],

        // Forms for different sections
        generalForm: {
            subdomain: '',
            is_active: true
        },

        businessForm: {
            name: '',
            description: '',
            contact_email: '',
            contact_phone: '',
            website: '',
            business_address: '',
            tax_number: ''
        },

        // Track which fields are inherited from company
        businessInherited: {
            contact_email: false,
            contact_phone: false,
            website: false,
            business_address: false,
            tax_number: false
        },

        // Company name for display
        companyName: '',

        marketplaceForm: {
            letzshop_csv_url_fr: '',
            letzshop_csv_url_en: '',
            letzshop_csv_url_de: '',
            letzshop_default_tax_rate: null,
            letzshop_boost_sort: '',
            letzshop_delivery_method: '',
            letzshop_preorder_days: null
        },

        notificationForm: {
            email_notifications: true,
            order_notifications: true,
            marketing_emails: false
        },

        localizationForm: {
            default_language: 'fr',
            dashboard_language: 'fr',
            storefront_language: 'fr',
            storefront_languages: ['fr', 'de', 'en'],
            storefront_locale: ''
        },

        // Email settings
        emailSettings: null,
        emailSettingsLoading: false,
        emailProviders: [],
        emailForm: {
            from_email: '',
            from_name: '',
            reply_to_email: '',
            signature_text: '',
            signature_html: '',
            provider: 'smtp',
            // SMTP
            smtp_host: '',
            smtp_port: 587,
            smtp_username: '',
            smtp_password: '',
            smtp_use_tls: true,
            smtp_use_ssl: false,
            // SendGrid
            sendgrid_api_key: '',
            // Mailgun
            mailgun_api_key: '',
            mailgun_domain: '',
            // SES
            ses_access_key_id: '',
            ses_secret_access_key: '',
            ses_region: 'eu-west-1'
        },
        testEmailAddress: '',
        sendingTestEmail: false,
        hasEmailChanges: false,

        // Track changes per section
        hasChanges: false,
        hasBusinessChanges: false,
        hasLocalizationChanges: false,
        hasMarketplaceChanges: false,

        async init() {
            vendorSettingsLog.info('Settings init() called');

            // Guard against multiple initialization
            if (window._vendorSettingsInitialized) {
                vendorSettingsLog.warn('Already initialized, skipping');
                return;
            }
            window._vendorSettingsInitialized = true;

            // IMPORTANT: Call parent init first to set vendorCode from URL
            const parentInit = data().init;
            if (parentInit) {
                await parentInit.call(this);
            }

            try {
                await this.loadSettings();
            } catch (error) {
                vendorSettingsLog.error('Init failed:', error);
                this.error = 'Failed to initialize settings page';
            }

            vendorSettingsLog.info('Settings initialization complete');
        },

        /**
         * Load vendor settings
         */
        async loadSettings() {
            this.loading = true;
            this.error = '';

            try {
                const response = await apiClient.get(`/vendor/settings`);

                this.settings = response;

                // Populate general form
                this.generalForm = {
                    subdomain: response.subdomain || '',
                    is_active: response.is_active !== false
                };

                // Populate business info form with inheritance tracking
                const biz = response.business_info || {};
                this.businessForm = {
                    name: response.name || '',
                    description: response.description || '',
                    contact_email: biz.contact_email_override || '',
                    contact_phone: biz.contact_phone_override || '',
                    website: biz.website_override || '',
                    business_address: biz.business_address_override || '',
                    tax_number: biz.tax_number_override || ''
                };
                this.businessInherited = {
                    contact_email: biz.contact_email_inherited || false,
                    contact_phone: biz.contact_phone_inherited || false,
                    website: biz.website_inherited || false,
                    business_address: biz.business_address_inherited || false,
                    tax_number: biz.tax_number_inherited || false
                };
                this.companyName = biz.company_name || '';

                // Populate localization form from nested structure
                const loc = response.localization || {};
                this.localizationForm = {
                    default_language: loc.default_language || 'fr',
                    dashboard_language: loc.dashboard_language || 'fr',
                    storefront_language: loc.storefront_language || 'fr',
                    storefront_languages: loc.storefront_languages || ['fr', 'de', 'en'],
                    storefront_locale: loc.storefront_locale || ''
                };

                // Populate marketplace form from nested structure
                const lz = response.letzshop || {};
                this.marketplaceForm = {
                    letzshop_csv_url_fr: lz.csv_url_fr || '',
                    letzshop_csv_url_en: lz.csv_url_en || '',
                    letzshop_csv_url_de: lz.csv_url_de || '',
                    letzshop_default_tax_rate: lz.default_tax_rate,
                    letzshop_boost_sort: lz.boost_sort || '',
                    letzshop_delivery_method: lz.delivery_method || '',
                    letzshop_preorder_days: lz.preorder_days
                };

                // Reset all change flags
                this.hasChanges = false;
                this.hasBusinessChanges = false;
                this.hasLocalizationChanges = false;
                this.hasMarketplaceChanges = false;

                vendorSettingsLog.info('Loaded settings');
            } catch (error) {
                vendorSettingsLog.error('Failed to load settings:', error);
                this.error = error.message || 'Failed to load settings';
            } finally {
                this.loading = false;
            }
        },

        /**
         * Mark general form as changed
         */
        markChanged() {
            this.hasChanges = true;
        },

        /**
         * Mark business form as changed
         */
        markBusinessChanged() {
            this.hasBusinessChanges = true;
        },

        /**
         * Mark localization form as changed
         */
        markLocalizationChanged() {
            this.hasLocalizationChanges = true;
        },

        /**
         * Mark marketplace form as changed
         */
        markMarketplaceChanged() {
            this.hasMarketplaceChanges = true;
        },

        /**
         * Get effective value for a business field (override or inherited)
         */
        getEffectiveBusinessValue(field) {
            const override = this.businessForm[field];
            if (override) return override;
            // Return the effective value from settings (includes company inheritance)
            return this.settings?.business_info?.[field] || '';
        },

        /**
         * Check if field is using inherited value
         */
        isFieldInherited(field) {
            return this.businessInherited[field] && !this.businessForm[field];
        },

        /**
         * Reset a business field to inherit from company
         */
        resetToCompany(field) {
            this.businessForm[field] = '';
            this.hasBusinessChanges = true;
        },

        /**
         * Save business info
         */
        async saveBusinessInfo() {
            this.saving = true;
            try {
                // Determine which fields should be reset to company values
                const resetFields = [];
                for (const field of ['contact_email', 'contact_phone', 'website', 'business_address', 'tax_number']) {
                    if (!this.businessForm[field] && this.settings?.business_info?.[field]) {
                        resetFields.push(field);
                    }
                }

                const payload = {
                    name: this.businessForm.name,
                    description: this.businessForm.description,
                    contact_email: this.businessForm.contact_email || null,
                    contact_phone: this.businessForm.contact_phone || null,
                    website: this.businessForm.website || null,
                    business_address: this.businessForm.business_address || null,
                    tax_number: this.businessForm.tax_number || null,
                    reset_to_company: resetFields
                };

                await apiClient.put(`/vendor/settings/business-info`, payload);

                Utils.showToast('Business info saved', 'success');
                vendorSettingsLog.info('Business info updated');

                // Reload to get updated inheritance flags
                await this.loadSettings();
                this.hasBusinessChanges = false;
            } catch (error) {
                vendorSettingsLog.error('Failed to save business info:', error);
                Utils.showToast(error.message || 'Failed to save business info', 'error');
            } finally {
                this.saving = false;
            }
        },

        /**
         * Save marketplace settings (Letzshop)
         */
        async saveMarketplaceSettings() {
            this.saving = true;
            try {
                await apiClient.put(`/vendor/settings/letzshop`, this.marketplaceForm);

                Utils.showToast('Marketplace settings saved', 'success');
                vendorSettingsLog.info('Marketplace settings updated');

                this.hasMarketplaceChanges = false;
            } catch (error) {
                vendorSettingsLog.error('Failed to save marketplace settings:', error);
                Utils.showToast(error.message || 'Failed to save settings', 'error');
            } finally {
                this.saving = false;
            }
        },

        /**
         * Test Letzshop CSV URL
         */
        async testLetzshopUrl(lang) {
            const url = this.marketplaceForm[`letzshop_csv_url_${lang}`];
            if (!url) {
                Utils.showToast('Please enter a URL first', 'error');
                return;
            }

            this.saving = true;
            try {
                // Try to fetch the URL to validate it
                const response = await fetch(url, { method: 'HEAD', mode: 'no-cors' });
                Utils.showToast(`URL appears to be valid`, 'success');
            } catch (error) {
                Utils.showToast('Could not validate URL - it may still work', 'warning');
            } finally {
                this.saving = false;
            }
        },

        /**
         * Reset settings to saved values
         */
        resetSettings() {
            this.loadSettings();
        },

        /**
         * Switch active section
         */
        setSection(sectionId) {
            this.activeSection = sectionId;
        },

        /**
         * Toggle a storefront language
         */
        toggleStorefrontLanguage(langCode) {
            const index = this.localizationForm.storefront_languages.indexOf(langCode);
            if (index === -1) {
                this.localizationForm.storefront_languages.push(langCode);
            } else {
                this.localizationForm.storefront_languages.splice(index, 1);
            }
            this.hasLocalizationChanges = true;
        },

        /**
         * Save localization settings
         */
        async saveLocalizationSettings() {
            this.saving = true;
            try {
                await apiClient.put(`/vendor/settings/localization`, this.localizationForm);

                Utils.showToast('Localization settings saved', 'success');
                vendorSettingsLog.info('Localization settings updated');

                this.hasLocalizationChanges = false;
            } catch (error) {
                vendorSettingsLog.error('Failed to save localization settings:', error);
                Utils.showToast(error.message || 'Failed to save settings', 'error');
            } finally {
                this.saving = false;
            }
        },

        // =====================================================================
        // EMAIL SETTINGS
        // =====================================================================

        /**
         * Load email settings when email tab is activated
         */
        async loadEmailSettings() {
            if (this.emailSettings !== null) {
                return; // Already loaded
            }

            this.emailSettingsLoading = true;
            try {
                // Load settings and providers in parallel
                const [settingsResponse, providersResponse] = await Promise.all([
                    apiClient.get('/vendor/email-settings'),
                    apiClient.get('/vendor/email-settings/providers')
                ]);

                this.emailProviders = providersResponse.providers || [];

                if (settingsResponse.configured && settingsResponse.settings) {
                    this.emailSettings = settingsResponse.settings;
                    this.populateEmailForm(settingsResponse.settings);
                } else {
                    this.emailSettings = { is_configured: false, is_verified: false };
                }

                vendorSettingsLog.info('Loaded email settings');
            } catch (error) {
                vendorSettingsLog.error('Failed to load email settings:', error);
                Utils.showToast('Failed to load email settings', 'error');
            } finally {
                this.emailSettingsLoading = false;
            }
        },

        /**
         * Populate email form from settings
         */
        populateEmailForm(settings) {
            this.emailForm = {
                from_email: settings.from_email || '',
                from_name: settings.from_name || '',
                reply_to_email: settings.reply_to_email || '',
                signature_text: settings.signature_text || '',
                signature_html: settings.signature_html || '',
                provider: settings.provider || 'smtp',
                // SMTP - don't populate password
                smtp_host: settings.smtp_host || '',
                smtp_port: settings.smtp_port || 587,
                smtp_username: settings.smtp_username || '',
                smtp_password: '', // Never populate password
                smtp_use_tls: settings.smtp_use_tls !== false,
                smtp_use_ssl: settings.smtp_use_ssl || false,
                // SendGrid - don't populate API key
                sendgrid_api_key: '',
                // Mailgun - don't populate API key
                mailgun_api_key: '',
                mailgun_domain: settings.mailgun_domain || '',
                // SES - don't populate secrets
                ses_access_key_id: '',
                ses_secret_access_key: '',
                ses_region: settings.ses_region || 'eu-west-1'
            };
            this.hasEmailChanges = false;
        },

        /**
         * Mark email form as changed
         */
        markEmailChanged() {
            this.hasEmailChanges = true;
        },

        /**
         * Save email settings
         */
        async saveEmailSettings() {
            // Validate required fields
            if (!this.emailForm.from_email || !this.emailForm.from_name) {
                Utils.showToast('From Email and From Name are required', 'error');
                return;
            }

            this.saving = true;
            try {
                const response = await apiClient.put('/vendor/email-settings', this.emailForm);

                if (response.success) {
                    Utils.showToast('Email settings saved', 'success');
                    vendorSettingsLog.info('Email settings updated');

                    // Update local state
                    this.emailSettings = response.settings;
                    this.hasEmailChanges = false;
                } else {
                    Utils.showToast(response.message || 'Failed to save email settings', 'error');
                }
            } catch (error) {
                vendorSettingsLog.error('Failed to save email settings:', error);
                Utils.showToast(error.message || 'Failed to save email settings', 'error');
            } finally {
                this.saving = false;
            }
        },

        /**
         * Send test email
         */
        async sendTestEmail() {
            if (!this.testEmailAddress) {
                Utils.showToast('Please enter a test email address', 'error');
                return;
            }

            if (!this.emailSettings?.is_configured) {
                Utils.showToast('Please save your email settings first', 'error');
                return;
            }

            this.sendingTestEmail = true;
            try {
                const response = await apiClient.post('/vendor/email-settings/verify', {
                    test_email: this.testEmailAddress
                });

                if (response.success) {
                    Utils.showToast('Test email sent! Check your inbox.', 'success');
                    // Update verification status
                    this.emailSettings.is_verified = true;
                } else {
                    Utils.showToast(response.message || 'Failed to send test email', 'error');
                }
            } catch (error) {
                vendorSettingsLog.error('Failed to send test email:', error);
                Utils.showToast(error.message || 'Failed to send test email', 'error');
            } finally {
                this.sendingTestEmail = false;
            }
        },

        /**
         * Switch active section - with email loading hook
         */
        setSection(sectionId) {
            this.activeSection = sectionId;

            // Load email settings when email tab is activated
            if (sectionId === 'email' && this.emailSettings === null) {
                this.loadEmailSettings();
            }
        }
    };
}