import React, { useState } from 'react';
import { __ } from '@/lib/i18n';
import { cn } from '@/lib/utils';
import { Button } from '@/components/ui/button';
import { Card } from '@/components/ui/card';
import {
    Plus, ChevronUp, ChevronDown, Trash2, GripVertical,
    LayoutTemplate, Type, Image, Grid3x3, Megaphone, MessageSquare,
    Loader2
} from 'lucide-react';
import {
    DropdownMenu,
    DropdownMenuContent,
    DropdownMenuItem,
    DropdownMenuTrigger,
} from '@/components/ui/dropdown-menu';

interface Section {
    id: string;
    type: string;
    layoutVariant?: string;
    colorScheme?: string;
    props: Record<string, any>;
}

interface SectionEditorProps {
    sections: Section[];
    selectedSection: Section | null;
    onSelectSection: (section: Section | null) => void;
    onAddSection: (type: string) => void;
    onDeleteSection: (id: string) => void;
    onMoveSection: (id: string, direction: 'up' | 'down') => void;
    isTemplate: boolean;
    cpt?: string;
    isLoading: boolean;
}

const SECTION_TYPES = [
    { type: 'hero', label: 'Hero', icon: LayoutTemplate },
    { type: 'content', label: 'Content', icon: Type },
    { type: 'image-text', label: 'Image + Text', icon: Image },
    { type: 'feature-grid', label: 'Feature Grid', icon: Grid3x3 },
    { type: 'cta-banner', label: 'CTA Banner', icon: Megaphone },
    { type: 'contact-form', label: 'Contact Form', icon: MessageSquare },
];

export function SectionEditor({
    sections,
    selectedSection,
    onSelectSection,
    onAddSection,
    onDeleteSection,
    onMoveSection,
    isTemplate,
    cpt,
    isLoading,
}: SectionEditorProps) {
    if (isLoading) {
        return (
            <div className="h-full flex items-center justify-center">
                <Loader2 className="w-8 h-8 animate-spin text-gray-400" />
            </div>
        );
    }

    return (
        <div className="space-y-4">
            {/* Section Header */}
            <div className="flex items-center justify-between">
                <h2 className="text-lg font-semibold">{__('Sections')}</h2>
                {isTemplate && (
                    <span className="text-xs bg-primary/10 text-primary px-2 py-1 rounded">
                        {__('Template: ')} {cpt}
                    </span>
                )}
            </div>

            {/* Sections List */}
            <div className="space-y-3">
                {sections.map((section, index) => {
                    const sectionType = SECTION_TYPES.find(s => s.type === section.type);
                    const Icon = sectionType?.icon || LayoutTemplate;
                    const hasDynamic = Object.values(section.props).some(
                        p => typeof p === 'object' && p?.type === 'dynamic'
                    );

                    return (
                        <Card
                            key={section.id}
                            className={cn(
                                'p-4 cursor-pointer transition-all',
                                'hover:shadow-md',
                                selectedSection?.id === section.id
                                    ? 'ring-2 ring-primary shadow-md'
                                    : ''
                            )}
                            onClick={() => onSelectSection(section)}
                        >
                            <div className="flex items-center gap-3">
                                <GripVertical className="w-4 h-4 text-gray-400 cursor-grab" />

                                <div className="flex-1 flex items-center gap-3">
                                    <div className="w-10 h-10 rounded-lg bg-gray-100 flex items-center justify-center">
                                        <Icon className="w-5 h-5 text-gray-600" />
                                    </div>
                                    <div>
                                        <div className="font-medium text-sm">
                                            {sectionType?.label || section.type}
                                        </div>
                                        <div className="text-xs text-gray-500">
                                            {section.layoutVariant || 'default'}
                                            {hasDynamic && (
                                                <span className="ml-2 text-primary">◆ {__('Dynamic')}</span>
                                            )}
                                        </div>
                                    </div>
                                </div>

                                <div className="flex items-center gap-1" onClick={e => e.stopPropagation()}>
                                    <Button
                                        variant="ghost"
                                        size="icon"
                                        className="h-8 w-8"
                                        onClick={() => onMoveSection(section.id, 'up')}
                                        disabled={index === 0}
                                    >
                                        <ChevronUp className="w-4 h-4" />
                                    </Button>
                                    <Button
                                        variant="ghost"
                                        size="icon"
                                        className="h-8 w-8"
                                        onClick={() => onMoveSection(section.id, 'down')}
                                        disabled={index === sections.length - 1}
                                    >
                                        <ChevronDown className="w-4 h-4" />
                                    </Button>
                                    <Button
                                        variant="ghost"
                                        size="icon"
                                        className="h-8 w-8 text-red-500 hover:text-red-600 hover:bg-red-50"
                                        onClick={() => {
                                            if (confirm(__('Delete this section?'))) {
                                                onDeleteSection(section.id);
                                            }
                                        }}
                                    >
                                        <Trash2 className="w-4 h-4" />
                                    </Button>
                                </div>
                            </div>
                        </Card>
                    );
                })}

                {sections.length === 0 && (
                    <div className="text-center py-12 text-gray-400">
                        <LayoutTemplate className="w-12 h-12 mx-auto mb-4 opacity-50" />
                        <p>{__('No sections yet. Add your first section.')}</p>
                    </div>
                )}
            </div>

            {/* Add Section Button */}
            <DropdownMenu>
                <DropdownMenuTrigger asChild>
                    <Button variant="outline" className="w-full">
                        <Plus className="w-4 h-4 mr-2" />
                        {__('Add Section')}
                    </Button>
                </DropdownMenuTrigger>
                <DropdownMenuContent className="w-56">
                    {SECTION_TYPES.map((sectionType) => {
                        const Icon = sectionType.icon;
                        return (
                            <DropdownMenuItem
                                key={sectionType.type}
                                onClick={() => onAddSection(sectionType.type)}
                            >
                                <Icon className="w-4 h-4 mr-2" />
                                {sectionType.label}
                            </DropdownMenuItem>
                        );
                    })}
                </DropdownMenuContent>
            </DropdownMenu>
        </div>
    );
}