"use client";

import { useState, useCallback, useEffect } from "react";
import { motion } from "framer-motion";
import { Video, Settings } from "lucide-react";
import { FileUploader } from "@/components/tools/FileUploader";
import { ProgressBar } from "@/components/tools/ProgressBar";
import { ResultPreview } from "@/components/tools/ResultPreview";
import { ConfigPanel, type ConfigOption } from "@/components/tools/ConfigPanel";
import { Button } from "@/components/ui/button";
import { useUploadStore } from "@/store/uploadStore";
import { generateId } from "@/lib/utils";
import { useTranslation, getServerTranslations } from "@/lib/i18n";
import type { UploadedFile, ProcessedFile, VideoFramesConfig } from "@/types";

const videoAccept = {
  "video/*": [".mp4", ".mov", ".avi", ".webm", ".mkv"],
};

const defaultConfig: VideoFramesConfig = {
  fps: 30,
  format: "png",
  quality: 90,
  width: undefined,
  height: undefined,
};

function useConfigOptions(config: VideoFramesConfig, getT: (key: string) => string): ConfigOption[] {
  return [
    {
      id: "fps",
      type: "slider",
      label: getT("config.videoFrames.fps"),
      description: getT("config.videoFrames.fpsDescription"),
      value: config.fps,
      min: 1,
      max: 60,
      step: 1,
      suffix: " fps",
      icon: <Video className="h-4 w-4" />,
    },
    {
      id: "format",
      type: "select",
      label: getT("config.videoFrames.format"),
      description: getT("config.videoFrames.formatDescription"),
      value: config.format,
      options: [
        { label: "PNG", value: "png" },
        { label: "JPEG", value: "jpeg" },
        { label: "WebP", value: "webp" },
      ],
    },
    {
      id: "quality",
      type: "slider",
      label: getT("config.videoFrames.quality"),
      description: getT("config.videoFrames.qualityDescription"),
      value: config.quality,
      min: 1,
      max: 100,
      step: 1,
      suffix: "%",
    },
  ];
}

export default function VideoFramesPage() {
  const [mounted, setMounted] = useState(false);
  useEffect(() => setMounted(true), []);
  const { t } = useTranslation();

  const getT = (key: string, params?: Record<string, string | number>) => {
    if (!mounted) return getServerTranslations("en").t(key, params);
    return t(key, params);
  };

  const { files, addFile, removeFile, clearFiles, processingStatus, setProcessingStatus } =
    useUploadStore();

  const [config, setConfig] = useState<VideoFramesConfig>(defaultConfig);
  const [processedFiles, setProcessedFiles] = useState<ProcessedFile[]>([]);

  const handleFilesDrop = useCallback(
    (acceptedFiles: File[]) => {
      const newFiles: UploadedFile[] = acceptedFiles.map((file) => ({
        id: generateId(),
        file,
        name: file.name,
        size: file.size,
        type: file.type,
        uploadedAt: new Date(),
      }));

      newFiles.forEach((file) => addFile(file));
    },
    [addFile]
  );

  const handleConfigChange = (id: string, value: string | number | boolean | undefined) => {
    setConfig((prev) => ({ ...prev, [id]: value }));
  };

  const handleResetConfig = () => {
    setConfig(defaultConfig);
  };

  const handleProcess = async () => {
    if (files.length === 0) return;

    setProcessingStatus({
      status: "uploading",
      progress: 0,
      message: getT("processing.uploadingVideo"),
    });

    try {
      // Simulate upload
      for (let i = 0; i <= 100; i += 10) {
        await new Promise((resolve) => setTimeout(resolve, 100));
        setProcessingStatus({
          status: "uploading",
          progress: i,
          message: getT("processing.uploadProgress", { progress: i }),
        });
      }

      setProcessingStatus({
        status: "processing",
        progress: 0,
        message: getT("processing.extractingFrames"),
      });

      // Simulate processing
      for (let i = 0; i <= 100; i += 5) {
        await new Promise((resolve) => setTimeout(resolve, 150));
        setProcessingStatus({
          status: "processing",
          progress: i,
          message: getT("processing.processProgress", { progress: i }),
        });
      }

      // Simulate completion
      const results: ProcessedFile[] = files.map((file) => ({
        id: generateId(),
        originalFile: file,
        processedUrl: "#",
        metadata: {
          format: config.format,
          quality: config.quality,
          fps: config.fps,
          frames: Math.floor(10 * config.fps), // Simulated
        },
        createdAt: new Date(),
      }));

      setProcessedFiles(results);
      clearFiles();

      setProcessingStatus({
        status: "completed",
        progress: 100,
        message: getT("processing.processingComplete"),
      });
    } catch (error) {
      setProcessingStatus({
        status: "failed",
        progress: 0,
        message: getT("processing.processingFailed"),
        error: error instanceof Error ? error.message : getT("processing.unknownError"),
      });
    }
  };

  const handleDownload = (fileId: string) => {
    console.log("Downloading file:", fileId);
  };

  const canProcess = files.length > 0 && processingStatus.status !== "processing";
  const configOptions = useConfigOptions(config, getT);

  return (
    <div className="p-6">
      <motion.div
        initial={{ opacity: 0, y: 20 }}
        animate={{ opacity: 1, y: 0 }}
      >
        {/* Header */}
        <div className="mb-8">
          <div className="flex items-center gap-3">
            <div className="flex h-12 w-12 items-center justify-center rounded-lg bg-primary/10">
              <Video className="h-6 w-6 text-primary" />
            </div>
            <div>
              <h1 className="text-3xl font-bold">{getT("tools.videoFrames.title")}</h1>
              <p className="text-muted-foreground">
                {getT("tools.videoFrames.description")}
              </p>
            </div>
          </div>
        </div>

        <div className="grid gap-6 lg:grid-cols-2">
          {/* Left Column - Upload and Config */}
          <div className="space-y-6">
            <FileUploader
              files={files}
              onFilesDrop={handleFilesDrop}
              onRemoveFile={removeFile}
              accept={videoAccept}
              maxSize={500 * 1024 * 1024} // 500MB
              maxFiles={1}
              disabled={processingStatus.status === "processing"}
            />

            <ConfigPanel
              title={getT("config.videoFrames.title")}
              description={getT("config.videoFrames.description")}
              options={configOptions.map((opt) => ({
                ...opt,
                value: config[opt.id as keyof VideoFramesConfig],
              }))}
              onChange={handleConfigChange}
              onReset={handleResetConfig}
            />

            {canProcess && (
              <Button onClick={handleProcess} size="lg" className="w-full">
                <Settings className="mr-2 h-4 w-4" />
                {getT("tools.videoFrames.processVideo")}
              </Button>
            )}
          </div>

          {/* Right Column - Progress and Results */}
          <div className="space-y-6">
            {processingStatus.status !== "idle" && (
              <ProgressBar progress={processingStatus} />
            )}

            {processedFiles.length > 0 && (
              <ResultPreview results={processedFiles} onDownload={handleDownload} />
            )}

            {/* Info Card */}
            <div className="rounded-lg border border-border/40 bg-card/50 p-6">
              <h3 className="mb-3 font-semibold">{getT("tools.videoFrames.howItWorks")}</h3>
              <ol className="space-y-2 text-sm text-muted-foreground">
                {(getT("tools.videoFrames.steps") as unknown as string[]).map((step, index) => (
                  <li key={index}>{index + 1}. {step}</li>
                ))}
              </ol>
            </div>
          </div>
        </div>
      </motion.div>
    </div>
  );
}