'use client';
import { useEffect, useState } from 'react';
import { useParams } from 'next/navigation';
import axios from 'axios';
import ReactMarkdown from 'react-markdown';
import remarkGfm from 'remark-gfm';
import Link from 'next/link';

const BlogPost = () => {
    const params = useParams();
    const [blog, setBlog] = useState<any>(null);
    const [loading, setLoading] = useState(true);

    useEffect(() => {
        const fetchBlog = async () => {
            try {
                const response = await axios.get(`http://localhost:3020/api/blog/${params.id}`);
                if (response.data.ok) {
                    setBlog(response.data.data);
                }
            } catch (error) {
                console.error("Fetch error:", error);
            } finally {
                setLoading(false);
            }
        };
        if (params.id) fetchBlog();
    }, [params.id]);

    if (loading) return (
        <div className="flex items-center justify-center min-h-[60vh]">
            <div className="animate-spin rounded-full h-12 w-12 border-t-2 border-b-2 border-primary"></div>
        </div>
    );

    if (!blog) return <div className="text-center py-20 text-2xl">Blog not found</div>;

    return (
        <div className="max-w-[1000px] mx-auto px-5 py-10">
            <Link href="/blog-generator" className="btn btn-outline-primary mb-8 inline-flex items-center gap-2">
                ← Back to Generator
            </Link>

            <article className="panel shadow-xl overflow-hidden border-none outline-none">
                {/* Header Section */}
                <div className="relative h-[400px] w-full overflow-hidden">
                    <img
                        src={blog.generatedImageUrls?.[0] || 'https://images.unsplash.com/photo-1499750310107-5fef28a66643?auto=format&fit=crop&q=80&w=1500'}
                        alt={blog.title}
                        className="w-full h-full object-cover transition-transform duration-700 hover:scale-105"
                    />
                    <div className="absolute inset-0 bg-gradient-to-t from-black/80 via-black/40 to-transparent flex flex-col justify-end p-8 lg:p-12">
                        <div className="flex gap-2 mb-4">
                            <span className="badge badge-primary bg-primary/20 backdrop-blur-md text-primary-light border-none">Industry Insight</span>
                            <span className="badge badge-secondary bg-secondary/20 backdrop-blur-md text-secondary-light border-none">AI Generated</span>
                        </div>
                        <h1 className="text-3xl lg:text-5xl font-bold text-white leading-tight">
                            {blog.title}
                        </h1>
                        <div className="flex items-center gap-6 mt-6 text-gray-300 text-sm">
                            <span>{new Date(blog.createdAt).toLocaleDateString()}</span>
                            <span>•</span>
                            <span>{blog.wordCount || 1800}+ Words</span>
                            <span>•</span>
                            <span className="flex items-center gap-1">
                                <span className="w-2 h-2 rounded-full bg-green-500"></span>
                                SEO Score: {blog.seoScore}%
                            </span>
                        </div>
                    </div>
                </div>

                {/* Performance Metrics Bar */}
                <div className="grid grid-cols-2 lg:grid-cols-4 gap-4 p-6 bg-white dark:bg-black/20 border-b">
                    <div className="text-center p-4 rounded-xl bg-primary/5">
                        <p className="text-[10px] text-secondary-dark uppercase font-black mb-1 tracking-wider">SEO Score</p>
                        <p className="text-3xl font-black text-primary">{blog.seoScore}%</p>
                    </div>
                    <div className="text-center p-4 rounded-xl bg-info/5">
                        <p className="text-[10px] text-secondary-dark uppercase font-black mb-1 tracking-wider">Human Score</p>
                        <p className="text-3xl font-black text-info">{blog.aiDetectionScore || 92}%</p>
                    </div>
                    <div className="text-center p-4 rounded-xl bg-success/5">
                        <p className="text-[10px] text-secondary-dark uppercase font-black mb-1 tracking-wider">Readability</p>
                        <p className="text-3xl font-black text-success">{blog.readabilityScore || 85}%</p>
                    </div>
                    <div className="text-center p-4 rounded-xl bg-warning/5 border border-warning/20">
                        <p className="text-[10px] text-secondary-dark uppercase font-black mb-1 tracking-wider">Focus Keyword</p>
                        <p className="text-sm font-bold text-warning truncate px-2">{blog.focusKeyword || 'Optimized'}</p>
                    </div>
                </div>

                {/* Content Section */}
                <div className="p-8 lg:p-16 prose prose-slate prose-lg dark:prose-invert max-w-none 
                    prose-headings:text-black dark:prose-headings:text-white 
                    prose-h1:text-4xl lg:prose-h1:text-5xl prose-h1:mb-8
                    prose-h2:text-3xl prose-h2:mt-12 prose-h2:mb-6
                    prose-h3:text-2xl prose-h3:mt-8
                    prose-p:text-gray-700 dark:prose-p:text-gray-300 prose-p:leading-relaxed prose-p:text-lg
                    prose-li:text-gray-700 dark:prose-li:text-gray-300
                    prose-blockquote:border-primary prose-blockquote:bg-primary/5 prose-blockquote:py-2 prose-blockquote:px-8 prose-blockquote:rounded-r-2xl prose-blockquote:italic prose-blockquote:text-lg">
                    <ReactMarkdown remarkPlugins={[remarkGfm]}>
                        {blog.content}
                    </ReactMarkdown>
                </div>

                {/* SEO Analysis Detail */}
                {blog.seoDetails && blog.seoDetails.length > 0 && (
                    <div className="px-8 lg:px-16 pb-8">
                        <div className="p-8 rounded-2xl bg-gray-50 dark:bg-white/5 border border-gray-100 dark:border-white/10 shadow-sm">
                            <h3 className="text-xl font-bold mb-6 flex items-center gap-3 text-primary">
                                <svg xmlns="http://www.w3.org/2000/svg" className="h-7 w-7" fill="none" viewBox="0 0 24 24" stroke="currentColor">
                                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 19v-6a2 2 0 00-2-2H5a2 2 0 00-2 2v6a2 2 0 002 2h2a2 2 0 002-2zm0 0V9a2 2 0 012-2h2a2 2 0 012 2v10m-6 0a2 2 0 002 2h2a2 2 0 002-2m0 0V5a2 2 0 012-2h2a2 2 0 012 2v14a2 2 0 01-2 2h-2a2 2 0 01-2-2z" />
                                </svg>
                                SEO Quality Checklist
                            </h3>
                            <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
                                {blog.seoDetails.map((detail: string, i: number) => (
                                    <div key={i} className="flex items-start gap-3 p-3 rounded-lg bg-white dark:bg-black/20 border border-gray-100 dark:border-white/5 text-gray-700 dark:text-gray-300">
                                        <div className={`mt-1 h-5 w-5 flex-shrink-0 flex items-center justify-center rounded-full ${detail.toLowerCase().includes('missing') ? 'bg-red-100 text-red-600' : 'bg-green-100 text-green-600'}`}>
                                            {detail.toLowerCase().includes('missing') ? (
                                                <svg className="w-3 h-3" fill="currentColor" viewBox="0 0 20 20"><path fillRule="evenodd" d="M4.293 4.293a1 1 0 011.414 0L10 8.586l4.293-4.293a1 1 0 111.414 1.414L11.414 10l4.293 4.293a1 1 0 01-1.414 1.414L10 11.414l-4.293 4.293a1 1 0 01-1.414-1.414L8.586 10 4.293 5.707a1 1 0 010-1.414z" clipRule="evenodd" /></svg>
                                            ) : (
                                                <svg className="w-3 h-3" fill="currentColor" viewBox="0 0 20 20"><path fillRule="evenodd" d="M16.707 5.293a1 1 0 010 1.414l-8 8a1 1 0 01-1.414 0l-4-4a1 1 0 011.414-1.414L8 12.586l7.293-7.293a1 1 0 011.414 0z" clipRule="evenodd" /></svg>
                                            )}
                                        </div>
                                        <span className="text-sm font-medium">{detail}</span>
                                    </div>
                                ))}
                            </div>
                        </div>
                    </div>
                )}

                {/* FAQ Section */}
                {blog.faqs && blog.faqs.length > 0 && (
                    <div className="px-8 lg:px-16 pb-16">
                        <div className="p-8 rounded-3xl bg-primary/5 dark:bg-primary/10 border border-primary/10">
                            <h3 className="text-2xl font-black mb-8 text-black dark:text-white flex items-center gap-3">
                                <span className="p-2 bg-primary text-white rounded-lg">
                                    <svg xmlns="http://www.w3.org/2000/svg" className="h-5 w-5" viewBox="0 0 20 20" fill="currentColor">
                                        <path fillRule="evenodd" d="M18 10a8 8 0 11-16 0 8 8 0 0116 0zm-8-3a1 1 0 00-.867.5 1 1 0 11-1.731-1A3 3 0 0113 8a3.001 3.001 0 01-2 2.83V11a1 1 0 11-2 0v-1a1 1 0 011-1 1 1 0 100-2zm0 8a1 1 0 100-2 1 1 0 000 2z" clipRule="evenodd" />
                                    </svg>
                                </span>
                                Frequently Asked Questions
                            </h3>
                            <div className="space-y-4">
                                {blog.faqs.map((faq: any, i: number) => (
                                    <div key={i} className="p-6 rounded-2xl bg-white dark:bg-black/40 border border-gray-100 dark:border-white/5 hover:border-primary/30 transition-all shadow-sm group">
                                        <h4 className="text-lg font-bold mb-3 text-black dark:text-white group-hover:text-primary transition-colors">
                                            {faq.question}
                                        </h4>
                                        <p className="text-gray-600 dark:text-gray-400 leading-relaxed">
                                            {faq.answer}
                                        </p>
                                    </div>
                                ))}
                            </div>
                        </div>
                    </div>
                )}
            </article>

            {/* Float CTA */}
            <div className="mt-12 text-center p-12 rounded-3xl bg-gradient-to-r from-primary to-secondary text-white">
                <h2 className="text-3xl font-bold mb-4">Want content like this for your site?</h2>
                <p className="text-lg opacity-90 mb-8 max-w-xl mx-auto">Our AI-powered engine analyzes your target niche and builds expert topical authority in seconds.</p>
                <Link href="/pricing" className="btn btn-white bg-white text-primary font-bold px-10 py-4 rounded-full text-lg hover:shadow-xl transition-all">
                    Upgrade to Pro Plan
                </Link>
            </div>
        </div>
    );
};

export default BlogPost;