"use client";

import { useState } from "react";
import { motion, AnimatePresence } from "framer-motion";
import {
  Sparkles,
  Loader2,
  Image as ImageIcon,
  RefreshCw,
  CheckCircle,
  XCircle,
} from "lucide-react";
import Image from "next/image";

interface AIImageGeneratorProps {
  projectId: number;
  projectTitle: string;
  currentImageUrl?: string | null;
  onImageGenerated?: (imageUrl: string) => void;
}

export default function AIImageGenerator({
  projectId,
  projectTitle,
  currentImageUrl,
  onImageGenerated,
}: AIImageGeneratorProps) {
  const [isGenerating, setIsGenerating] = useState(false);
  const [status, setStatus] = useState<"idle" | "success" | "error">("idle");
  const [message, setMessage] = useState("");
  const [generatedImageUrl, setGeneratedImageUrl] = useState(
    currentImageUrl || null,
  );
  const [showPreview, setShowPreview] = useState(false);

  const handleGenerate = async (regenerate: boolean = false) => {
    setIsGenerating(true);
    setStatus("idle");
    setMessage("Generating AI image...");

    try {
      const response = await fetch("/api/n8n/generate-image", {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
        },
        body: JSON.stringify({
          projectId: projectId,
          regenerate: regenerate,
        }),
      });

      const data = await response.json();

      if (response.ok && data.success) {
        setStatus("success");
        setMessage(data.message || "Image generated successfully!");
        setGeneratedImageUrl(data.imageUrl);
        setShowPreview(true);

        if (onImageGenerated) {
          onImageGenerated(data.imageUrl);
        }
      } else {
        setStatus("error");
        setMessage(data.error || data.message || "Failed to generate image");
      }
    } catch (error) {
      setStatus("error");
      setMessage(
        error instanceof Error ? error.message : "An unexpected error occurred",
      );
    } finally {
      setIsGenerating(false);
    }
  };

  return (
    <div className="bg-white rounded-2xl border-2 border-stone-200 p-6 shadow-sm">
      <div className="flex items-center gap-3 mb-4">
        <div className="p-2 bg-gradient-to-br from-purple-100 to-pink-100 rounded-lg">
          <Sparkles className="text-purple-600" size={20} />
        </div>
        <div>
          <h3 className="font-bold text-stone-900">AI Image Generator</h3>
          <p className="text-sm text-stone-600">
            Generate cover image for:{" "}
            <span className="font-semibold">{projectTitle}</span>
          </p>
        </div>
      </div>

      {/* Current/Generated Image Preview */}
      <AnimatePresence mode="wait">
        {(generatedImageUrl || showPreview) && (
          <motion.div
            initial={{ opacity: 0, y: 10 }}
            animate={{ opacity: 1, y: 0 }}
            exit={{ opacity: 0, y: -10 }}
            transition={{ duration: 0.3 }}
            className="mb-4 relative group"
          >
            <div className="aspect-[4/3] rounded-xl overflow-hidden border-2 border-stone-200 bg-stone-50">
              {generatedImageUrl ? (
                <Image
                  src={generatedImageUrl}
                  alt={projectTitle}
                  fill
                  className="object-cover"
                />
              ) : (
                <div className="w-full h-full flex items-center justify-center">
                  <ImageIcon className="text-stone-300" size={48} />
                </div>
              )}
            </div>
            {generatedImageUrl && (
              <div className="absolute top-2 right-2 bg-white/90 backdrop-blur-sm px-3 py-1 rounded-full text-xs font-medium text-stone-700 border border-stone-200">
                Current Image
              </div>
            )}
          </motion.div>
        )}
      </AnimatePresence>

      {/* Status Message */}
      <AnimatePresence mode="wait">
        {message && (
          <motion.div
            initial={{ opacity: 0, scale: 0.95 }}
            animate={{ opacity: 1, scale: 1 }}
            exit={{ opacity: 0, scale: 0.95 }}
            transition={{ duration: 0.2 }}
            className={`mb-4 p-3 rounded-xl border-2 flex items-center gap-2 ${
              status === "success"
                ? "bg-green-50 border-green-200 text-green-800"
                : status === "error"
                  ? "bg-red-50 border-red-200 text-red-800"
                  : "bg-blue-50 border-blue-200 text-blue-800"
            }`}
          >
            {status === "success" && <CheckCircle size={18} />}
            {status === "error" && <XCircle size={18} />}
            {status === "idle" && isGenerating && (
              <Loader2 size={18} className="animate-spin" />
            )}
            <span className="text-sm font-medium">{message}</span>
          </motion.div>
        )}
      </AnimatePresence>

      {/* Action Buttons */}
      <div className="flex gap-3">
        <motion.button
          whileHover={{ scale: 1.02 }}
          whileTap={{ scale: 0.98 }}
          onClick={() => handleGenerate(false)}
          disabled={isGenerating || !!generatedImageUrl}
          className={`flex-1 py-3 px-4 rounded-xl font-semibold text-white transition-all duration-300 flex items-center justify-center gap-2 ${
            isGenerating
              ? "bg-stone-400 cursor-not-allowed"
              : generatedImageUrl
                ? "bg-stone-300 cursor-not-allowed"
                : "bg-gradient-to-br from-purple-600 to-pink-600 hover:from-purple-700 hover:to-pink-700 shadow-lg hover:shadow-xl"
          }`}
        >
          {isGenerating ? (
            <>
              <Loader2 size={18} className="animate-spin" />
              Generating...
            </>
          ) : (
            <>
              <Sparkles size={18} />
              Generate Image
            </>
          )}
        </motion.button>

        {generatedImageUrl && (
          <motion.button
            initial={{ opacity: 0, scale: 0.8 }}
            animate={{ opacity: 1, scale: 1 }}
            whileHover={{ scale: 1.02 }}
            whileTap={{ scale: 0.98 }}
            onClick={() => handleGenerate(true)}
            disabled={isGenerating}
            className={`py-3 px-4 rounded-xl font-semibold transition-all duration-300 flex items-center justify-center gap-2 border-2 ${
              isGenerating
                ? "bg-stone-100 border-stone-300 text-stone-400 cursor-not-allowed"
                : "bg-white border-purple-300 text-purple-700 hover:bg-purple-50 hover:border-purple-400"
            }`}
          >
            <RefreshCw size={18} />
            Regenerate
          </motion.button>
        )}
      </div>

      {/* Info Box */}
      <div className="mt-4 p-3 bg-gradient-to-br from-blue-50 to-purple-50 border border-blue-200 rounded-lg">
        <p className="text-xs text-stone-700 leading-relaxed">
          <span className="font-semibold">💡 How it works:</span> The AI
          analyzes your project&aposs title, description, category, and tech
          stack to create a unique cover image using Stable Diffusion.
          Generation takes 15-30 seconds.
        </p>
      </div>

      {/* Advanced Options (Optional) */}
      <details className="mt-4">
        <summary className="cursor-pointer text-sm font-semibold text-stone-700 hover:text-stone-900 transition-colors">
          Advanced Options
        </summary>
        <div className="mt-3 space-y-3 pl-4 border-l-2 border-stone-200">
          <div className="text-xs text-stone-600 space-y-1">
            <p>
              <strong>Image Size:</strong> 1024x768 (4:3 aspect ratio)
            </p>
            <p>
              <strong>Quality:</strong> High (30 steps, CFG 7)
            </p>
            <p>
              <strong>Sampler:</strong> DPM++ 2M Karras
            </p>
            <p>
              <strong>Model:</strong> SDXL Base / Category-specific
            </p>
          </div>
          <button
            onClick={() =>
              window.open("/docs/ai-image-generation/SETUP.md", "_blank")
            }
            className="text-xs text-purple-600 hover:text-purple-700 font-medium underline"
          >
            View Full Documentation →
          </button>
        </div>
      </details>
    </div>
  );
}