/**
 * Site Settings (Advanced)
 * Phase 7: Advanced Site Management
 * Features: SEO (meta tags, Open Graph, schema.org)
 */
import React, { useState, useEffect } from 'react';
import { useParams, useNavigate } from 'react-router-dom';
import { SettingsIcon, SearchIcon, Share2Icon, CodeIcon } from 'lucide-react';
import PageMeta from '../../components/common/PageMeta';
import { Card } from '../../components/ui/card';
import Button from '../../components/ui/button/Button';
import Label from '../../components/form/Label';
import SelectDropdown from '../../components/form/SelectDropdown';
import Checkbox from '../../components/form/input/Checkbox';
import TextArea from '../../components/form/input/TextArea';
import { useToast } from '../../components/ui/toast/ToastContainer';
import { fetchAPI } from '../../services/api';

export default function SiteSettings() {
  const { siteId } = useParams<{ siteId: string }>();
  const navigate = useNavigate();
  const toast = useToast();
  const [loading, setLoading] = useState(true);
  const [saving, setSaving] = useState(false);
  const [site, setSite] = useState<any>(null);

  const [activeTab, setActiveTab] = useState<'general' | 'seo' | 'og' | 'schema'>('general');
  const [formData, setFormData] = useState({
    name: '',
    slug: '',
    site_type: 'marketing',
    hosting_type: 'igny8_sites',
    is_active: true,
    // SEO fields
    meta_title: '',
    meta_description: '',
    meta_keywords: '',
    og_title: '',
    og_description: '',
    og_image: '',
    og_type: 'website',
    og_site_name: '',
    schema_type: 'Organization',
    schema_name: '',
    schema_description: '',
    schema_url: '',
    schema_logo: '',
    schema_same_as: '',
  });

  useEffect(() => {
    if (siteId) {
      loadSite();
    }
  }, [siteId]);

  const loadSite = async () => {
    try {
      setLoading(true);
      const data = await fetchAPI(`/v1/auth/sites/${siteId}/`);
      if (data) {
        setSite(data);
        const seoData = data.seo_metadata || data.metadata || {};
        setFormData({
          name: data.name || '',
          slug: data.slug || '',
          site_type: data.site_type || 'marketing',
          hosting_type: data.hosting_type || 'igny8_sites',
          is_active: data.is_active !== false,
          // SEO fields
          meta_title: seoData.meta_title || data.name || '',
          meta_description: seoData.meta_description || data.description || '',
          meta_keywords: seoData.meta_keywords || '',
          og_title: seoData.og_title || seoData.meta_title || data.name || '',
          og_description: seoData.og_description || seoData.meta_description || data.description || '',
          og_image: seoData.og_image || '',
          og_type: seoData.og_type || 'website',
          og_site_name: seoData.og_site_name || data.name || '',
          schema_type: seoData.schema_type || 'Organization',
          schema_name: seoData.schema_name || data.name || '',
          schema_description: seoData.schema_description || data.description || '',
          schema_url: seoData.schema_url || data.domain || '',
          schema_logo: seoData.schema_logo || '',
          schema_same_as: Array.isArray(seoData.schema_same_as) ? seoData.schema_same_as.join(', ') : seoData.schema_same_as || '',
        });
      }
    } catch (error: any) {
      toast.error(`Failed to load site: ${error.message}`);
    } finally {
      setLoading(false);
    }
  };

  const handleSave = async () => {
    try {
      setSaving(true);
      const { meta_title, meta_description, meta_keywords, og_title, og_description, og_image, og_type, og_site_name, schema_type, schema_name, schema_description, schema_url, schema_logo, schema_same_as, ...basicData } = formData;
      
      const payload = {
        ...basicData,
        seo_metadata: {
          meta_title,
          meta_description,
          meta_keywords,
          og_title,
          og_description,
          og_image,
          og_type,
          og_site_name,
          schema_type,
          schema_name,
          schema_description,
          schema_url,
          schema_logo,
          schema_same_as: schema_same_as ? schema_same_as.split(',').map((s) => s.trim()).filter(Boolean) : [],
        },
      };
      
      await fetchAPI(`/v1/auth/sites/${siteId}/`, {
        method: 'PUT',
        body: JSON.stringify(payload),
      });
      toast.success('Site settings saved successfully');
      loadSite();
    } catch (error: any) {
      toast.error(`Failed to save settings: ${error.message}`);
    } finally {
      setSaving(false);
    }
  };

  const SITE_TYPES = [
    { value: 'marketing', label: 'Marketing Site' },
    { value: 'ecommerce', label: 'Ecommerce Site' },
    { value: 'blog', label: 'Blog' },
    { value: 'portfolio', label: 'Portfolio' },
    { value: 'corporate', label: 'Corporate' },
  ];

  const HOSTING_TYPES = [
    { value: 'igny8_sites', label: 'IGNY8 Sites' },
    { value: 'wordpress', label: 'WordPress' },
    { value: 'shopify', label: 'Shopify' },
    { value: 'multi', label: 'Multi-Destination' },
  ];

  if (loading) {
    return (
      <div className="p-6">
        <PageMeta title="Site Settings" />
        <div className="flex items-center justify-center h-64">
          <div className="text-gray-500">Loading site settings...</div>
        </div>
      </div>
    );
  }

  return (
    <div className="p-6">
      <PageMeta title="Site Settings - IGNY8" />
      
      <div className="mb-6">
        <h1 className="text-2xl font-bold text-gray-900 dark:text-white">
          Site Settings
        </h1>
        <p className="text-gray-600 dark:text-gray-400 mt-1">
          Configure site type, hosting, and other settings
        </p>
      </div>

      {/* Tabs */}
      <div className="mb-6 border-b border-gray-200 dark:border-gray-700">
        <div className="flex gap-4">
          <button
            type="button"
            onClick={() => setActiveTab('general')}
            className={`px-4 py-2 font-medium border-b-2 transition-colors ${
              activeTab === 'general'
                ? 'border-brand-500 text-brand-600 dark:text-brand-400'
                : 'border-transparent text-gray-500 hover:text-gray-700 dark:text-gray-400 dark:hover:text-gray-300'
            }`}
          >
            <SettingsIcon className="w-4 h-4 inline mr-2" />
            General
          </button>
          <button
            type="button"
            onClick={() => setActiveTab('seo')}
            className={`px-4 py-2 font-medium border-b-2 transition-colors ${
              activeTab === 'seo'
                ? 'border-brand-500 text-brand-600 dark:text-brand-400'
                : 'border-transparent text-gray-500 hover:text-gray-700 dark:text-gray-400 dark:hover:text-gray-300'
            }`}
          >
            <SearchIcon className="w-4 h-4 inline mr-2" />
            SEO Meta Tags
          </button>
          <button
            type="button"
            onClick={() => setActiveTab('og')}
            className={`px-4 py-2 font-medium border-b-2 transition-colors ${
              activeTab === 'og'
                ? 'border-brand-500 text-brand-600 dark:text-brand-400'
                : 'border-transparent text-gray-500 hover:text-gray-700 dark:text-gray-400 dark:hover:text-gray-300'
            }`}
          >
            <Share2Icon className="w-4 h-4 inline mr-2" />
            Open Graph
          </button>
          <button
            type="button"
            onClick={() => setActiveTab('schema')}
            className={`px-4 py-2 font-medium border-b-2 transition-colors ${
              activeTab === 'schema'
                ? 'border-brand-500 text-brand-600 dark:text-brand-400'
                : 'border-transparent text-gray-500 hover:text-gray-700 dark:text-gray-400 dark:hover:text-gray-300'
            }`}
          >
            <CodeIcon className="w-4 h-4 inline mr-2" />
            Schema.org
          </button>
        </div>
      </div>

      <div className="space-y-6">
        {/* General Tab */}
        {activeTab === 'general' && (
          <Card className="p-6">
            <div className="space-y-4">
              <div>
                <Label>Site Name</Label>
                <input
                  type="text"
                  value={formData.name}
                  onChange={(e) => setFormData({ ...formData, name: e.target.value })}
                  className="mt-1 w-full px-3 py-2 border border-gray-300 dark:border-gray-700 rounded-md dark:bg-gray-800 dark:text-white"
                />
              </div>

              <div>
                <Label>Slug</Label>
                <input
                  type="text"
                  value={formData.slug}
                  onChange={(e) => setFormData({ ...formData, slug: e.target.value })}
                  className="mt-1 w-full px-3 py-2 border border-gray-300 dark:border-gray-700 rounded-md dark:bg-gray-800 dark:text-white"
                />
              </div>

              <div>
                <Label>Site Type</Label>
                <SelectDropdown
                  options={SITE_TYPES}
                  value={formData.site_type}
                  onChange={(e) => setFormData({ ...formData, site_type: e.target.value })}
                />
              </div>

              <div>
                <Label>Hosting Type</Label>
                <SelectDropdown
                  options={HOSTING_TYPES}
                  value={formData.hosting_type}
                  onChange={(e) => setFormData({ ...formData, hosting_type: e.target.value })}
                />
              </div>

              <div>
                <Checkbox
                  checked={formData.is_active}
                  onChange={(e) => setFormData({ ...formData, is_active: e.target.checked })}
                  label="Active"
                />
              </div>
            </div>
          </Card>
        )}

        {/* SEO Meta Tags Tab */}
        {activeTab === 'seo' && (
          <Card className="p-6">
            <div className="space-y-4">
              <div>
                <Label>Meta Title</Label>
                <input
                  type="text"
                  value={formData.meta_title}
                  onChange={(e) => setFormData({ ...formData, meta_title: e.target.value })}
                  placeholder="SEO title (recommended: 50-60 characters)"
                  maxLength={60}
                  className="mt-1 w-full px-3 py-2 border border-gray-300 dark:border-gray-700 rounded-md dark:bg-gray-800 dark:text-white"
                />
                <p className="mt-1 text-xs text-gray-500 dark:text-gray-400">
                  {formData.meta_title.length}/60 characters
                </p>
              </div>

              <div>
                <Label>Meta Description</Label>
                <TextArea
                  value={formData.meta_description}
                  onChange={(value) => setFormData({ ...formData, meta_description: value })}
                  rows={4}
                  placeholder="SEO description (recommended: 150-160 characters)"
                  maxLength={160}
                  className="mt-1"
                />
                <p className="mt-1 text-xs text-gray-500 dark:text-gray-400">
                  {formData.meta_description.length}/160 characters
                </p>
              </div>

              <div>
                <Label>Meta Keywords (comma-separated)</Label>
                <input
                  type="text"
                  value={formData.meta_keywords}
                  onChange={(e) => setFormData({ ...formData, meta_keywords: e.target.value })}
                  placeholder="keyword1, keyword2, keyword3"
                  className="mt-1 w-full px-3 py-2 border border-gray-300 dark:border-gray-700 rounded-md dark:bg-gray-800 dark:text-white"
                />
                <p className="mt-1 text-xs text-gray-500 dark:text-gray-400">
                  Separate keywords with commas
                </p>
              </div>
            </div>
          </Card>
        )}

        {/* Open Graph Tab */}
        {activeTab === 'og' && (
          <Card className="p-6">
            <div className="space-y-4">
              <div>
                <Label>OG Title</Label>
                <input
                  type="text"
                  value={formData.og_title}
                  onChange={(e) => setFormData({ ...formData, og_title: e.target.value })}
                  placeholder="Open Graph title"
                  className="mt-1 w-full px-3 py-2 border border-gray-300 dark:border-gray-700 rounded-md dark:bg-gray-800 dark:text-white"
                />
              </div>

              <div>
                <Label>OG Description</Label>
                <TextArea
                  value={formData.og_description}
                  onChange={(value) => setFormData({ ...formData, og_description: value })}
                  rows={4}
                  placeholder="Open Graph description"
                  className="mt-1"
                />
              </div>

              <div>
                <Label>OG Image URL</Label>
                <input
                  type="url"
                  value={formData.og_image}
                  onChange={(e) => setFormData({ ...formData, og_image: e.target.value })}
                  placeholder="https://example.com/image.jpg"
                  className="mt-1 w-full px-3 py-2 border border-gray-300 dark:border-gray-700 rounded-md dark:bg-gray-800 dark:text-white"
                />
                <p className="mt-1 text-xs text-gray-500 dark:text-gray-400">
                  Recommended: 1200x630px image
                </p>
              </div>

              <div>
                <Label>OG Type</Label>
                <SelectDropdown
                  options={[
                    { value: 'website', label: 'Website' },
                    { value: 'article', label: 'Article' },
                    { value: 'business.business', label: 'Business' },
                    { value: 'product', label: 'Product' },
                  ]}
                  value={formData.og_type}
                  onChange={(e) => setFormData({ ...formData, og_type: e.target.value })}
                />
              </div>

              <div>
                <Label>OG Site Name</Label>
                <input
                  type="text"
                  value={formData.og_site_name}
                  onChange={(e) => setFormData({ ...formData, og_site_name: e.target.value })}
                  placeholder="Site name for social sharing"
                  className="mt-1 w-full px-3 py-2 border border-gray-300 dark:border-gray-700 rounded-md dark:bg-gray-800 dark:text-white"
                />
              </div>
            </div>
          </Card>
        )}

        {/* Schema.org Tab */}
        {activeTab === 'schema' && (
          <Card className="p-6">
            <div className="space-y-4">
              <div>
                <Label>Schema Type</Label>
                <SelectDropdown
                  options={[
                    { value: 'Organization', label: 'Organization' },
                    { value: 'LocalBusiness', label: 'Local Business' },
                    { value: 'WebSite', label: 'Website' },
                    { value: 'Corporation', label: 'Corporation' },
                    { value: 'NGO', label: 'NGO' },
                  ]}
                  value={formData.schema_type}
                  onChange={(e) => setFormData({ ...formData, schema_type: e.target.value })}
                />
              </div>

              <div>
                <Label>Schema Name</Label>
                <input
                  type="text"
                  value={formData.schema_name}
                  onChange={(e) => setFormData({ ...formData, schema_name: e.target.value })}
                  placeholder="Organization name"
                  className="mt-1 w-full px-3 py-2 border border-gray-300 dark:border-gray-700 rounded-md dark:bg-gray-800 dark:text-white"
                />
              </div>

              <div>
                <Label>Schema Description</Label>
                <TextArea
                  value={formData.schema_description}
                  onChange={(value) => setFormData({ ...formData, schema_description: value })}
                  rows={3}
                  placeholder="Organization description"
                  className="mt-1"
                />
              </div>

              <div>
                <Label>Schema URL</Label>
                <input
                  type="url"
                  value={formData.schema_url}
                  onChange={(e) => setFormData({ ...formData, schema_url: e.target.value })}
                  placeholder="https://example.com"
                  className="mt-1 w-full px-3 py-2 border border-gray-300 dark:border-gray-700 rounded-md dark:bg-gray-800 dark:text-white"
                />
              </div>

              <div>
                <Label>Schema Logo URL</Label>
                <input
                  type="url"
                  value={formData.schema_logo}
                  onChange={(e) => setFormData({ ...formData, schema_logo: e.target.value })}
                  placeholder="https://example.com/logo.png"
                  className="mt-1 w-full px-3 py-2 border border-gray-300 dark:border-gray-700 rounded-md dark:bg-gray-800 dark:text-white"
                />
              </div>

              <div>
                <Label>Same As URLs (comma-separated)</Label>
                <input
                  type="text"
                  value={formData.schema_same_as}
                  onChange={(e) => setFormData({ ...formData, schema_same_as: e.target.value })}
                  placeholder="https://facebook.com/page, https://twitter.com/page"
                  className="mt-1 w-full px-3 py-2 border border-gray-300 dark:border-gray-700 rounded-md dark:bg-gray-800 dark:text-white"
                />
                <p className="mt-1 text-xs text-gray-500 dark:text-gray-400">
                  Social media profiles and other related URLs
                </p>
              </div>
            </div>
          </Card>
        )}

        <div className="flex justify-end">
          <Button onClick={handleSave} variant="primary" disabled={saving}>
            {saving ? 'Saving...' : 'Save Settings'}
          </Button>
        </div>
      </div>
    </div>
  );
}