"use client";

import { useState, useRef, useCallback } from "react";
import { Bold, List, ListOrdered, AlignLeft, AlignRight } from "lucide-react";

interface RichTextEditorProps {
    value: string;
    onChange: (value: string) => void;
    placeholder?: string;
    minHeight?: string;
}

export function RichTextEditor({ value, onChange, placeholder, minHeight = "200px" }: RichTextEditorProps) {
    const editorRef = useRef<HTMLDivElement>(null);
    const [isFocused, setIsFocused] = useState(false);

    const execCommand = useCallback((command: string, value?: string) => {
        document.execCommand(command, false, value);
        if (editorRef.current) {
            onChange(editorRef.current.innerHTML);
        }
    }, [onChange]);

    const handleInput = () => {
        if (editorRef.current) {
            onChange(editorRef.current.innerHTML);
        }
    };

    const handlePaste = (e: React.ClipboardEvent) => {
        e.preventDefault();
        const text = e.clipboardData.getData('text/plain');
        document.execCommand('insertText', false, text);
    };

    const ToolbarButton = ({ onClick, active, children, title }: {
        onClick: () => void;
        active?: boolean;
        children: React.ReactNode;
        title: string;
    }) => (
        <button
            type="button"
            onClick={onClick}
            title={title}
            className={`p-1.5 rounded hover:bg-muted transition-colors ${active ? 'bg-muted text-primary' : 'text-muted-foreground'}`}
        >
            {children}
        </button>
    );

    return (
        <div className={`border rounded-lg overflow-hidden ${isFocused ? 'ring-2 ring-ring ring-offset-2' : ''}`}>
            {/* Toolbar */}
            <div className="flex items-center gap-1 p-2 border-b bg-muted/30">
                <ToolbarButton onClick={() => execCommand('bold')} title="Negrito">
                    <Bold className="h-4 w-4" />
                </ToolbarButton>
                <div className="w-px h-4 bg-border mx-1" />
                <ToolbarButton onClick={() => execCommand('insertUnorderedList')} title="Lista com marcadores">
                    <List className="h-4 w-4" />
                </ToolbarButton>
                <ToolbarButton onClick={() => execCommand('insertOrderedList')} title="Lista numerada">
                    <ListOrdered className="h-4 w-4" />
                </ToolbarButton>
                <div className="w-px h-4 bg-border mx-1" />
                <ToolbarButton onClick={() => execCommand('justifyLeft')} title="Alinhar à esquerda">
                    <AlignLeft className="h-4 w-4" />
                </ToolbarButton>
                <ToolbarButton onClick={() => execCommand('justifyRight')} title="Alinhar à direita">
                    <AlignRight className="h-4 w-4" />
                </ToolbarButton>
            </div>

            {/* Editor Area */}
            <div
                ref={editorRef}
                contentEditable
                onInput={handleInput}
                onPaste={handlePaste}
                onFocus={() => setIsFocused(true)}
                onBlur={() => setIsFocused(false)}
                className="p-3 outline-none bg-background"
                style={{ minHeight }}
                data-placeholder={placeholder}
                dangerouslySetInnerHTML={{ __html: value }}
                suppressContentEditableWarning
            />

            <style jsx>{`
                [contenteditable]:empty:before {
                    content: attr(data-placeholder);
                    color: hsl(var(--muted-foreground));
                    pointer-events: none;
                }
            `}</style>
        </div>
    );
}