"use client";

import { useRef } from "react";
import { FileUp, Sparkles, Trash2 } from "lucide-react";
import type { Caption } from "@/types";
import { Button } from "@/components/ui/button";
import { Textarea } from "@/components/ui/textarea";
import { parseSrt } from "@/lib/srt-parser";
import { autoSyncCaptions, captionsToText } from "@/lib/timing";

interface CaptionEditorProps {
  text: string;
  captions: Caption[];
  animationSpeed: number;
  onTextChange: (text: string) => void;
  onCaptionsChange: (captions: Caption[]) => void;
}

export function CaptionEditor({
  text,
  captions,
  animationSpeed,
  onTextChange,
  onCaptionsChange,
}: CaptionEditorProps) {
  const fileRef = useRef<HTMLInputElement>(null);

  const handleAutoSync = () => {
    if (!text.trim()) return;
    onCaptionsChange(autoSyncCaptions(text, animationSpeed));
  };

  const handleSrtUpload = async (file: File) => {
    const content = await file.text();
    const parsed = parseSrt(content);
    if (parsed.length === 0) return;
    onCaptionsChange(parsed);
    onTextChange(captionsToText(parsed));
  };

  return (
    <div className="space-y-3">
      <div className="flex items-center justify-between">
        <h3 className="text-sm font-semibold uppercase tracking-wide text-zinc-500">Caption Text</h3>
        <span className="text-xs text-zinc-400">{captions.length} words</span>
      </div>
      <Textarea
        value={text}
        onChange={(e) => onTextChange(e.target.value)}
        placeholder="Type or paste your captions here..."
        className="min-h-[160px] font-medium"
      />
      <div className="flex flex-wrap gap-2">
        <Button variant="secondary" size="sm" onClick={handleAutoSync}>
          <Sparkles className="h-4 w-4" /> Auto-sync
        </Button>
        <Button variant="outline" size="sm" onClick={() => fileRef.current?.click()}>
          <FileUp className="h-4 w-4" /> Upload .srt
        </Button>
        <Button
          variant="ghost"
          size="sm"
          onClick={() => {
            onTextChange("");
            onCaptionsChange([]);
          }}
        >
          <Trash2 className="h-4 w-4" /> Clear
        </Button>
        <input
          ref={fileRef}
          type="file"
          accept=".srt"
          className="hidden"
          onChange={(e) => {
            const file = e.target.files?.[0];
            if (file) void handleSrtUpload(file);
          }}
        />
      </div>
    </div>
  );
}