'use client';

import { useState } from 'react';
import { InspectMode } from './InspectMode';
import { PromptReuseButton } from './PromptReuseButton';
import { CompletedTimerBadge } from './GenerationTimer';
import { CodeExamplesWidget } from './CodeExamplesWidget';

const API_BASE_URL = process.env.NEXT_PUBLIC_API_URL || 'http://localhost:3000';

interface EnhancementOptionsData {
  imageStyle?: string;
  aspectRatio?: string;
  mood?: string;
  lighting?: string;
  cameraAngle?: string;
  negativePrompts?: string[];
}

interface GenerationResult {
  id: string;
  timestamp: Date;
  originalPrompt: string;
  enhancedPrompt?: string;
  leftImage: {
    url: string;
    width: number;
    height: number;
    error?: string;
  } | null;
  rightImage: {
    url: string;
    width: number;
    height: number;
    error?: string;
  } | null;
  durationMs?: number;
  leftData?: {
    request: object;
    response: object;
    geminiParams: object;
  };
  rightData?: {
    request: object;
    response: object;
    geminiParams: object;
  };
  enhancementOptions?: EnhancementOptionsData;
}

interface ResultCardProps {
  result: GenerationResult;
  apiKey: string;
  onZoom: (url: string) => void;
  onCopy: (text: string) => void;
  onDownload: (url: string, filename: string) => void;
  onReusePrompt: (prompt: string) => void;
}

type ViewMode = 'preview' | 'inspect';

export function ResultCard({
  result,
  apiKey,
  onZoom,
  onCopy,
  onDownload,
  onReusePrompt,
}: ResultCardProps) {
  const [viewMode, setViewMode] = useState<ViewMode>('preview');

  // Build enhancement options JSON for code examples
  const buildEnhancementOptionsJson = () => {
    if (!result.enhancementOptions) return '';

    const opts: any = {};
    if (result.enhancementOptions.imageStyle)
      opts.imageStyle = result.enhancementOptions.imageStyle;
    if (result.enhancementOptions.aspectRatio)
      opts.aspectRatio = result.enhancementOptions.aspectRatio;
    if (result.enhancementOptions.mood) opts.mood = result.enhancementOptions.mood;
    if (result.enhancementOptions.lighting) opts.lighting = result.enhancementOptions.lighting;
    if (result.enhancementOptions.cameraAngle)
      opts.cameraAngle = result.enhancementOptions.cameraAngle;
    if (result.enhancementOptions.negativePrompts)
      opts.negativePrompts = result.enhancementOptions.negativePrompts;

    if (Object.keys(opts).length === 0) return '';
    return JSON.stringify(opts, null, 2)
      .split('\n')
      .map((line, i) => (i === 0 ? line : `    ${line}`))
      .join('\n');
  };

  const enhancementOptionsJson = buildEnhancementOptionsJson();
  const hasEnhancementOptions = !!result.enhancementOptions;

  const curlCode = hasEnhancementOptions
    ? `# Right image (with enhancement options)
curl -X POST ${API_BASE_URL}/api/text-to-image \\
  -H "Content-Type: application/json" \\
  -H "X-API-Key: ${apiKey}" \\
  -d '{
    "prompt": "${result.originalPrompt.replace(/"/g, '\\"')}",
    "filename": "generated_image",
    "enhancementOptions": ${enhancementOptionsJson.replace(/\n/g, '\n    ')}
  }'`
    : `curl -X POST ${API_BASE_URL}/api/text-to-image \\
  -H "Content-Type: application/json" \\
  -H "X-API-Key: ${apiKey}" \\
  -d '{
    "prompt": "${result.originalPrompt.replace(/"/g, '\\"')}",
    "filename": "generated_image"
  }'`;

  const fetchCode = hasEnhancementOptions
    ? `// Right image (with enhancement options)
fetch('${API_BASE_URL}/api/text-to-image', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'X-API-Key': '${apiKey}'
  },
  body: JSON.stringify({
    prompt: '${result.originalPrompt.replace(/'/g, "\\'")}',
    filename: 'generated_image',
    enhancementOptions: ${enhancementOptionsJson}
  })
})
  .then(res => res.json())
  .then(data => console.log(data));`
    : `fetch('${API_BASE_URL}/api/text-to-image', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'X-API-Key': '${apiKey}'
  },
  body: JSON.stringify({
    prompt: '${result.originalPrompt.replace(/'/g, "\\'")}',
    filename: 'generated_image'
  })
})
  .then(res => res.json())
  .then(data => console.log(data));`;

  const restCode = hasEnhancementOptions
    ? `### Right Image - With Enhancement Options
POST ${API_BASE_URL}/api/text-to-image
Content-Type: application/json
X-API-Key: ${apiKey}

{
  "prompt": "${result.originalPrompt.replace(/"/g, '\\"')}",
  "filename": "generated_image",
  "enhancementOptions": ${enhancementOptionsJson}
}`
    : `### Generate Image - Text to Image
POST ${API_BASE_URL}/api/text-to-image
Content-Type: application/json
X-API-Key: ${apiKey}

{
  "prompt": "${result.originalPrompt.replace(/"/g, '\\"')}",
  "filename": "generated_image"
}`;

  const codeExamples = {
    curl: curlCode,
    fetch: fetchCode,
    rest: restCode,
  };

  return (
    <div className="p-5 bg-slate-900/80 backdrop-blur-sm border border-slate-700 rounded-2xl animate-fade-in">
      {/* Header */}
      <div className="mb-4 flex items-center justify-between gap-3 flex-wrap">
        <div className="flex items-center gap-3">
          <span className="text-sm text-gray-500">{result.timestamp.toLocaleString()}</span>
          {result.durationMs && <CompletedTimerBadge durationMs={result.durationMs} />}
        </div>

        {/* View Mode Toggle */}
        <div className="flex gap-1 p-1 bg-slate-950/50 border border-slate-700 rounded-lg">
          <button
            onClick={() => setViewMode('preview')}
            className={`px-3 py-1.5 text-xs font-medium rounded transition-colors ${
              viewMode === 'preview' ? 'bg-amber-600 text-white' : 'text-gray-400 hover:text-white'
            }`}
            aria-pressed={viewMode === 'preview'}
          >
            Preview
          </button>
          <button
            onClick={() => setViewMode('inspect')}
            className={`px-3 py-1.5 text-xs font-medium rounded transition-colors ${
              viewMode === 'inspect' ? 'bg-amber-600 text-white' : 'text-gray-400 hover:text-white'
            }`}
            aria-pressed={viewMode === 'inspect'}
          >
            Inspect
          </button>
        </div>
      </div>

      {/* Content */}
      {viewMode === 'preview' ? (
        <>
          {/* Image Comparison */}
          <div className="mb-5 overflow-x-auto scrollbar-thin scrollbar-thumb-slate-700 scrollbar-track-slate-800">
            <div className="flex gap-4 pb-4">
              {/* Left Image */}
              <ImagePreview
                image={result.leftImage}
                label="Original Prompt"
                prompt={result.originalPrompt}
                onZoom={onZoom}
                onDownload={onDownload}
                onReusePrompt={onReusePrompt}
                filename="original.png"
              />

              {/* Right Image */}
              <ImagePreview
                image={result.rightImage}
                label="Enhanced Prompt"
                prompt={result.enhancedPrompt || result.originalPrompt}
                onZoom={onZoom}
                onDownload={onDownload}
                onReusePrompt={onReusePrompt}
                filename="enhanced.png"
                hasEnhancementOptions={!!result.enhancementOptions}
              />
            </div>
          </div>

          {/* API Code Examples */}
          <CodeExamplesWidget codeExamples={codeExamples} onCopy={onCopy} />
        </>
      ) : (
        <InspectMode
          leftData={
            result.leftData || {
              request: { prompt: result.originalPrompt },
              response: { success: true, url: result.leftImage?.url },
              geminiParams: {},
            }
          }
          rightData={
            result.rightData || {
              request: { prompt: result.enhancedPrompt || result.originalPrompt },
              response: { success: true, url: result.rightImage?.url },
              geminiParams: {},
            }
          }
          onCopy={onCopy}
        />
      )}
    </div>
  );
}

// Image Preview Component
function ImagePreview({
  image,
  label,
  prompt,
  onZoom,
  onDownload,
  onReusePrompt,
  filename,
  hasEnhancementOptions = false,
}: {
  image: GenerationResult['leftImage'];
  label: string;
  prompt: string;
  onZoom: (url: string) => void;
  onDownload: (url: string, filename: string) => void;
  onReusePrompt: (prompt: string) => void;
  filename: string;
  hasEnhancementOptions?: boolean;
}) {
  const [promptExpanded, setPromptExpanded] = useState(false);
  const [urlCopied, setUrlCopied] = useState(false);

  const copyImageUrl = () => {
    if (image?.url) {
      navigator.clipboard.writeText(image.url);
      setUrlCopied(true);
      setTimeout(() => setUrlCopied(false), 2000);
    }
  };

  return (
    <div className="flex-shrink-0">
      <div className="mb-2 flex items-center justify-between gap-2">
        <div className="flex items-center gap-2">
          <span className="text-sm font-medium text-gray-400">{label}</span>
          {hasEnhancementOptions && (
            <span className="px-2 py-0.5 text-xs bg-amber-600/20 text-amber-400 rounded-full border border-amber-600/30">
              + Options
            </span>
          )}
        </div>
      </div>

      {image?.error ? (
        <div className="h-96 w-96 flex items-center justify-center bg-red-900/20 border border-red-700 rounded-lg">
          <div className="text-center p-4">
            <div className="text-4xl mb-2">⚠️</div>
            <div className="text-sm text-red-400">{image.error}</div>
          </div>
        </div>
      ) : (
        image && (
          <>
            <div className="relative group cursor-pointer">
              <img
                src={image.url}
                alt={label}
                className="h-96 w-auto object-contain rounded-lg border border-slate-700"
                onClick={() => onZoom(image.url)}
              />
              <button
                onClick={(e) => {
                  e.stopPropagation();
                  onDownload(image.url, filename);
                }}
                className="absolute top-2 right-2 px-3 py-1.5 bg-black/70 hover:bg-black/90 text-white text-xs rounded-lg opacity-0 group-hover:opacity-100 transition-opacity"
                aria-label={`Download ${label}`}
              >
                Download
              </button>
            </div>

            {/* Image URL with Copy Button */}
            <div className="mt-2 flex items-center gap-2 max-w-sm">
              <div className="flex-1 px-2 py-1 bg-slate-800/50 border border-slate-700 rounded text-xs text-gray-400 font-mono truncate">
                {image.url}
              </div>
              <button
                onClick={copyImageUrl}
                className="px-2 py-1 bg-slate-800 hover:bg-slate-700 border border-slate-700 rounded text-xs text-gray-300 hover:text-white transition-colors whitespace-nowrap"
                aria-label="Copy image URL"
              >
                {urlCopied ? '✓ Copied' : 'Copy URL'}
              </button>
            </div>
          </>
        )
      )}

      {/* Prompt with Truncation */}
      <div className="mt-2 flex items-start gap-2 max-w-sm">
        <div className="flex-1">
          <p
            className={`text-sm text-gray-300 leading-relaxed ${
              !promptExpanded ? 'line-clamp-4' : ''
            }`}
          >
            {prompt}
          </p>
          {prompt.length > 150 && (
            <button
              onClick={() => setPromptExpanded(!promptExpanded)}
              className="mt-1 text-xs text-amber-400 hover:text-amber-300 transition-colors"
            >
              {promptExpanded ? 'Show less' : 'Show more...'}
            </button>
          )}
        </div>
        <PromptReuseButton prompt={prompt} onReuse={onReusePrompt} label={label} />
      </div>
    </div>
  );
}