/**
 * Review Page Configuration
 * Centralized config for Review page table, filters, and actions
 */

import { Content } from '../../services/api';
import Badge from '../../components/ui/badge/Badge';
import { formatRelativeDate } from '../../utils/date';
import { CheckCircleIcon } from '../../icons';
import { STRUCTURE_LABELS, TYPE_LABELS } from '../structureMapping';

export interface ColumnConfig {
  key: string;
  label: string;
  sortable?: boolean;
  sortField?: string;
  align?: 'left' | 'center' | 'right';
  width?: string;
  numeric?: boolean;
  date?: boolean;
  render?: (value: any, row: any) => React.ReactNode;
  toggleable?: boolean;
  toggleContentKey?: string;
  toggleContentLabel?: string;
  defaultVisible?: boolean;
}

export interface FilterConfig {
  key: string;
  label: string;
  type: 'text' | 'select';
  placeholder?: string;
  options?: Array<{ value: string; label: string }>;
}

export interface HeaderMetricConfig {
  label: string;
  accentColor: 'blue' | 'green' | 'amber' | 'purple';
  calculate: (data: { content: Content[]; totalCount: number }) => number;
}

export interface ReviewPageConfig {
  columns: ColumnConfig[];
  filters: FilterConfig[];
  headerMetrics: HeaderMetricConfig[];
}

export function createReviewPageConfig(params: {
  searchTerm: string;
  setSearchTerm: (value: string) => void;
  statusFilter: string;
  setStatusFilter: (value: string) => void;
  setCurrentPage: (page: number) => void;
  activeSector: { id: number; name: string } | null;
  onRowClick?: (row: Content) => void;
}): ReviewPageConfig {
  const showSectorColumn = !params.activeSector;

  const columns: ColumnConfig[] = [
    {
      key: 'title',
      label: 'Content Idea Title',
      sortable: true,
      sortField: 'title',
      width: '400px',
      render: (value: string, row: Content) => (
        <div className="flex items-center gap-2">
          {params.onRowClick ? (
            <button
              onClick={() => params.onRowClick!(row)}
              className="text-sm text-brand-500 hover:text-brand-600 hover:underline text-left transition-colors"
            >
              {value || `Content #${row.id}`}
            </button>
          ) : (
            <span className="text-sm text-gray-900 dark:text-white">
              {value || `Content #${row.id}`}
            </span>
          )}
        </div>
      ),
    },
    {
      key: 'categories',
      label: 'Categories',
      sortable: false,
      render: (_value: any, row: Content) => {
        const categories = row.categories || [];
        if (!categories || categories.length === 0) {
          return <span className="text-gray-400 dark:text-gray-500 text-[11px]">-</span>;
        }
        return (
          <div className="flex flex-wrap gap-1">
            {categories.slice(0, 2).map((category, index) => (
              <Badge key={`${category}-${index}`} color="blue" size="xs" variant="soft">
                <span className="text-[11px] font-normal">{category}</span>
              </Badge>
            ))}
            {categories.length > 2 && (
              <span className="text-[11px] text-gray-500">+{categories.length - 2}</span>
            )}
          </div>
        );
      },
    },
    {
      key: 'tags',
      label: 'Tags',
      sortable: false,
      render: (_value: any, row: Content) => {
        const tags = row.tags || [];
        if (!tags || tags.length === 0) {
          return <span className="text-gray-400 dark:text-gray-500 text-[11px]">-</span>;
        }
        return (
          <div className="flex flex-wrap gap-1">
            {tags.slice(0, 2).map((tag, index) => (
              <Badge key={`${tag}-${index}`} color="pink" size="xs" variant="soft">
                <span className="text-[11px] font-normal">{tag}</span>
              </Badge>
            ))}
            {tags.length > 2 && (
              <span className="text-[11px] text-gray-500">+{tags.length - 2}</span>
            )}
          </div>
        );
      },
    },
    {
      key: 'content_type',
      label: 'Type',
      sortable: true,
      sortField: 'content_type',
      render: (value: string) => {
        const label = TYPE_LABELS[value] || value || '-';
        const properCase = label.charAt(0).toUpperCase() + label.slice(1);
        return (
          <Badge color="blue" size="xs" variant="soft">
            <span className="text-[11px] font-normal">{properCase}</span>
          </Badge>
        );
      },
    },
    {
      key: 'content_structure',
      label: 'Structure',
      sortable: true,
      sortField: 'content_structure',
      render: (value: string) => {
        const label = STRUCTURE_LABELS[value] || value || '-';
        const properCase = label.split(/[_\s]+/).map(word => 
          word.charAt(0).toUpperCase() + word.slice(1)
        ).join(' ');
        return (
          <Badge color="purple" size="xs" variant="soft">
            <span className="text-[11px] font-normal">{properCase}</span>
          </Badge>
        );
      },
    },
    {
      key: 'cluster_name',
      label: 'Cluster',
      sortable: false,
      render: (_value: any, row: Content) => {
        const clusterName = row.cluster_name;
        if (!clusterName) {
          return <span className="text-gray-400 dark:text-gray-500">-</span>;
        }
        return (
          <span className="text-gray-800 dark:text-white">
            {clusterName}
          </span>
        );
      },
    },
    {
      key: 'status',
      label: 'Status',
      sortable: true,
      sortField: 'status',
      render: (value: string, row: Content) => {
        const status = value || 'draft';
        const statusColors: Record<string, 'gray' | 'blue' | 'green' | 'amber' | 'red'> = {
          draft: 'gray',
          review: 'blue',
          published: 'green',
          scheduled: 'amber',
          archived: 'red',
        };
        const color = statusColors[status] || 'gray';
        const label = status.charAt(0).toUpperCase() + status.slice(1);
        
        return (
          <div className="flex items-center gap-1.5">
            <Badge color={color} size="xs" variant="soft">
              <span className="text-[11px] font-normal">{label}</span>
            </Badge>
            {row.external_id && (
              <CheckCircleIcon className="w-3.5 h-3.5 text-success-500" title="Published to Site" />
            )}
          </div>
        );
      },
    },
    {
      key: 'word_count',
      label: 'Words',
      sortable: true,
      sortField: 'word_count',
      numeric: true,
      align: 'center' as const,
      headingAlign: 'center' as const,
      render: (value: number) => (
        <span className="font-mono text-sm text-gray-700 dark:text-gray-300">
          {value?.toLocaleString() || 0}
        </span>
      ),
    },
    {
      key: 'created_at',
      label: 'Created',
      sortable: true,
      sortField: 'created_at',
      date: true,
      width: '130px',
      hasActions: true,
      render: (value: string) => (
        <span className="text-gray-700 dark:text-gray-300 whitespace-nowrap">
          {formatRelativeDate(value)}
        </span>
      ),
    },
  ];

  if (showSectorColumn) {
    columns.splice(4, 0, {
      key: 'sector_name',
      label: 'Sector',
      sortable: false,
      width: '120px',
      render: (value: string, row: Content) => (
        <Badge color="info" size="xs" variant="soft">
          <span className="text-[11px] font-normal">{row.sector_name || '-'}</span>
        </Badge>
      ),
    });
  }

  return {
    columns,
    filters: [
      {
        key: 'search',
        label: 'Search',
        type: 'text',
        placeholder: 'Search content...',
      },
    ],
    headerMetrics: [
      {
        label: 'Content',
        accentColor: 'blue',
        calculate: ({ totalCount }) => totalCount,
        tooltip: 'Total content items tracked. Overall volume across all stages.',
      },
      {
        label: 'Draft',
        accentColor: 'amber',
        calculate: ({ content }) => content.filter(c => c.status === 'draft').length,
        tooltip: 'Content written, images not generated. Generate images to move to review.',
      },
      {
        label: 'In Review',
        accentColor: 'purple',
        calculate: ({ content }) => content.filter(c => c.status === 'review').length,
        tooltip: 'Images generated, awaiting approval. Review and approve to publish.',
      },
      {
        label: 'Approved',
        accentColor: 'green',
        calculate: ({ content }) => content.filter(c => c.status === 'approved').length,
        tooltip: 'Approved content awaiting publishing. Publish to site when ready.',
      },
      {
        label: 'Published',
        accentColor: 'green',
        calculate: ({ content }) => content.filter(c => c.status === 'published').length,
        tooltip: 'Live content on your website. Successfully published and accessible.',
      },
      {
        label: 'Total Images',
        accentColor: 'blue',
        calculate: ({ content }) => content.filter(c => c.has_generated_images).length,
        tooltip: 'Total images generated across all content. Tracks visual asset coverage.',
      },
    ],
  };
}