// ================================================================
// frontend/src/components/dashboard/OrchestrationSummaryCard.tsx
// ================================================================
/**
 * Orchestration Summary Card - What the system did for you
 *
 * Builds trust by showing transparency into automation decisions.
 * Narrative format makes it feel like a helpful assistant.
 */

import React, { useState } from 'react';
import {
  Bot,
  TrendingUp,
  Package,
  Clock,
  CheckCircle,
  FileText,
  Users,
  Brain,
  ChevronDown,
  ChevronUp,
} from 'lucide-react';
import { OrchestrationSummary } from '../../api/hooks/newDashboard';
import { formatDistanceToNow } from 'date-fns';
import { useTranslation } from 'react-i18next';

interface OrchestrationSummaryCardProps {
  summary: OrchestrationSummary;
  loading?: boolean;
}

export function OrchestrationSummaryCard({ summary, loading }: OrchestrationSummaryCardProps) {
  const [expanded, setExpanded] = useState(false);
  const { t } = useTranslation('reasoning');

  if (loading || !summary) {
    return (
      <div className="rounded-xl shadow-md p-6" style={{ backgroundColor: 'var(--bg-primary)' }}>
        <div className="animate-pulse space-y-4">
          <div className="flex items-center gap-3">
            <div className="w-10 h-10 rounded-full" style={{ backgroundColor: 'var(--bg-tertiary)' }}></div>
            <div className="h-6 rounded w-1/2" style={{ backgroundColor: 'var(--bg-tertiary)' }}></div>
          </div>
          <div className="space-y-2">
            <div className="h-4 rounded" style={{ backgroundColor: 'var(--bg-tertiary)' }}></div>
            <div className="h-4 rounded w-5/6" style={{ backgroundColor: 'var(--bg-tertiary)' }}></div>
          </div>
        </div>
      </div>
    );
  }

  // Handle case where no orchestration has run yet
  if (summary.status === 'no_runs') {
    return (
      <div
        className="border-2 rounded-xl p-6"
        style={{
          backgroundColor: 'var(--color-info-50)',
          borderColor: 'var(--color-info-200)',
        }}
      >
        <div className="flex items-start gap-4">
          <Bot className="w-10 h-10 flex-shrink-0" style={{ color: 'var(--color-info-600)' }} />
          <div>
            <h3 className="text-lg font-bold mb-2" style={{ color: 'var(--color-info-900)' }}>
              {t('jtbd.orchestration_summary.ready_to_plan')}
            </h3>
            <p className="mb-4" style={{ color: 'var(--color-info-700)' }}>{summary.message || ''}</p>
            <button
              className="px-4 py-2 rounded-lg font-semibold transition-colors duration-200"
              style={{
                backgroundColor: 'var(--color-info-600)',
                color: 'var(--text-inverse)',
              }}
            >
              {t('jtbd.orchestration_summary.run_planning')}
            </button>
          </div>
        </div>
      </div>
    );
  }

  const runTime = summary.runTimestamp
    ? formatDistanceToNow(new Date(summary.runTimestamp), { addSuffix: true })
    : 'recently';

  return (
    <div
      className="rounded-xl shadow-md p-6 border"
      style={{
        background: 'linear-gradient(to bottom right, var(--color-primary-50), var(--color-info-50))',
        borderColor: 'var(--color-primary-100)',
      }}
    >
      {/* Header */}
      <div className="flex items-start gap-4 mb-6">
        <div className="p-3 rounded-full" style={{ backgroundColor: 'var(--color-primary-100)' }}>
          <Bot className="w-8 h-8" style={{ color: 'var(--color-primary-600)' }} />
        </div>
        <div className="flex-1">
          <h2 className="text-2xl font-bold mb-1" style={{ color: 'var(--text-primary)' }}>
            {t('jtbd.orchestration_summary.title')}
          </h2>
          <div className="flex items-center gap-2 text-sm" style={{ color: 'var(--text-secondary)' }}>
            <Clock className="w-4 h-4" />
            <span>
              {t('jtbd.orchestration_summary.run_info', { runNumber: summary.runNumber || 0 })} • {runTime}
            </span>
            {summary.durationSeconds && (
              <span style={{ color: 'var(--text-tertiary)' }}>
                • {t('jtbd.orchestration_summary.took', { seconds: summary.durationSeconds })}
              </span>
            )}
          </div>
        </div>
      </div>

      {/* Purchase Orders Created */}
      {summary.purchaseOrdersCreated > 0 && (
        <div className="rounded-lg p-4 mb-4" style={{ backgroundColor: 'var(--bg-primary)' }}>
          <div className="flex items-center gap-3 mb-3">
            <CheckCircle className="w-5 h-5" style={{ color: 'var(--color-success-600)' }} />
            <h3 className="font-bold" style={{ color: 'var(--text-primary)' }}>
              {t('jtbd.orchestration_summary.created_pos', { count: summary.purchaseOrdersCreated })}
            </h3>
          </div>

          {summary.purchaseOrdersSummary && summary.purchaseOrdersSummary.length > 0 && (
            <ul className="space-y-2 ml-8">
              {summary.purchaseOrdersSummary.map((po, index) => (
                <li key={index} className="text-sm" style={{ color: 'var(--text-secondary)' }}>
                  <span className="font-medium">{po.supplierName || 'Unknown Supplier'}</span>
                  {' • '}
                  {(po.itemCategories || []).slice(0, 2).join(', ') || 'Items'}
                  {(po.itemCategories || []).length > 2 && ` +${po.itemCategories.length - 2} more`}
                  {' • '}
                  <span className="font-semibold">€{(po.totalAmount || 0).toFixed(2)}</span>
                </li>
              ))}
            </ul>
          )}
        </div>
      )}

      {/* Production Batches Created */}
      {summary.productionBatchesCreated > 0 && (
        <div className="rounded-lg p-4 mb-4" style={{ backgroundColor: 'var(--bg-primary)' }}>
          <div className="flex items-center gap-3 mb-3">
            <CheckCircle className="w-5 h-5" style={{ color: 'var(--color-success-600)' }} />
            <h3 className="font-bold" style={{ color: 'var(--text-primary)' }}>
              {t('jtbd.orchestration_summary.scheduled_batches', {
                count: summary.productionBatchesCreated,
              })}
            </h3>
          </div>

          {summary.productionBatchesSummary && summary.productionBatchesSummary.length > 0 && (
            <ul className="space-y-2 ml-8">
              {summary.productionBatchesSummary.slice(0, expanded ? undefined : 3).map((batch, index) => (
                <li key={index} className="text-sm" style={{ color: 'var(--text-secondary)' }}>
                  <span className="font-semibold">{batch.quantity || 0}</span> {batch.productName || 'Product'}
                  {' • '}
                  <span style={{ color: 'var(--text-tertiary)' }}>
                    ready by {batch.readyByTime ? new Date(batch.readyByTime).toLocaleTimeString('en-US', {
                      hour: 'numeric',
                      minute: '2-digit',
                      hour12: true,
                    }) : 'TBD'}
                  </span>
                </li>
              ))}
            </ul>
          )}

          {summary.productionBatchesSummary && summary.productionBatchesSummary.length > 3 && (
            <button
              onClick={() => setExpanded(!expanded)}
              className="ml-8 mt-2 flex items-center gap-1 text-sm font-medium"
              style={{ color: 'var(--color-primary-600)' }}
            >
              {expanded ? (
                <>
                  <ChevronUp className="w-4 h-4" />
                  {t('jtbd.orchestration_summary.show_less')}
                </>
              ) : (
                <>
                  <ChevronDown className="w-4 h-4" />
                  {t('jtbd.orchestration_summary.show_more', {
                    count: summary.productionBatchesSummary.length - 3,
                  })}
                </>
              )}
            </button>
          )}
        </div>
      )}

      {/* No actions created */}
      {summary.purchaseOrdersCreated === 0 && summary.productionBatchesCreated === 0 && (
        <div className="rounded-lg p-4 mb-4" style={{ backgroundColor: 'var(--bg-primary)' }}>
          <div className="flex items-center gap-3">
            <CheckCircle className="w-5 h-5" style={{ color: 'var(--text-tertiary)' }} />
            <p style={{ color: 'var(--text-secondary)' }}>{t('jtbd.orchestration_summary.no_actions')}</p>
          </div>
        </div>
      )}

      {/* Reasoning Inputs (How decisions were made) */}
      <div className="rounded-lg p-4" style={{ backgroundColor: 'rgba(255, 255, 255, 0.6)' }}>
        <div className="flex items-center gap-2 mb-3">
          <Brain className="w-5 h-5" style={{ color: 'var(--color-primary-600)' }} />
          <h3 className="font-bold" style={{ color: 'var(--text-primary)' }}>{t('jtbd.orchestration_summary.based_on')}</h3>
        </div>

        <div className="grid grid-cols-2 gap-3 ml-7">
          {summary.reasoningInputs.customerOrders > 0 && (
            <div className="flex items-center gap-2 text-sm">
              <Users className="w-4 h-4" style={{ color: 'var(--text-secondary)' }} />
              <span style={{ color: 'var(--text-secondary)' }}>
                {t('jtbd.orchestration_summary.customer_orders', {
                  count: summary.reasoningInputs.customerOrders,
                })}
              </span>
            </div>
          )}

          {summary.reasoningInputs.historicalDemand && (
            <div className="flex items-center gap-2 text-sm">
              <TrendingUp className="w-4 h-4" style={{ color: 'var(--text-secondary)' }} />
              <span style={{ color: 'var(--text-secondary)' }}>
                {t('jtbd.orchestration_summary.historical_demand')}
              </span>
            </div>
          )}

          {summary.reasoningInputs.inventoryLevels && (
            <div className="flex items-center gap-2 text-sm">
              <Package className="w-4 h-4" style={{ color: 'var(--text-secondary)' }} />
              <span style={{ color: 'var(--text-secondary)' }}>{t('jtbd.orchestration_summary.inventory_levels')}</span>
            </div>
          )}

          {summary.reasoningInputs.aiInsights && (
            <div className="flex items-center gap-2 text-sm">
              <Brain className="w-4 h-4" style={{ color: 'var(--color-primary-600)' }} />
              <span className="font-medium" style={{ color: 'var(--text-secondary)' }}>
                {t('jtbd.orchestration_summary.ai_optimization')}
              </span>
            </div>
          )}
        </div>
      </div>

      {/* Actions Required Footer */}
      {summary.userActionsRequired > 0 && (
        <div
          className="mt-4 p-4 border rounded-lg"
          style={{
            backgroundColor: 'var(--color-warning-50)',
            borderColor: 'var(--color-warning-200)',
          }}
        >
          <div className="flex items-center gap-2">
            <FileText className="w-5 h-5" style={{ color: 'var(--color-warning-600)' }} />
            <p className="text-sm font-medium" style={{ color: 'var(--color-warning-900)' }}>
              {t('jtbd.orchestration_summary.actions_required', {
                count: summary.userActionsRequired,
              })}
            </p>
          </div>
        </div>
      )}
    </div>
  );
}
