import React, { useCallback, useState } from "react";
import {
	UploadOutlined,
	CheckCircleOutlined,
	DeleteOutlined,
} from "@ant-design/icons";
import { Upload, message, Progress, Button } from "antd";
import type { UploadFile } from "antd";
import { useTusUpload } from "@web/src/hooks/useTusUpload";

export interface TusUploaderProps {
	value?: string[];
	onChange?: (value: string[]) => void;
}

interface UploadingFile {
	name: string;
	progress: number;
	status: "uploading" | "done" | "error";
	fileId?: string;
}

export const TusUploader = ({ value = [], onChange }: TusUploaderProps) => {
	const { handleFileUpload } = useTusUpload();
	const [uploadingFiles, setUploadingFiles] = useState<UploadingFile[]>([]);
	const [completedFiles, setCompletedFiles] = useState<UploadingFile[]>(() => 
		value?.map(fileId => ({
			name: `File ${fileId}`, // We could fetch the actual filename if needed
			progress: 1,
			status: 'done' as const,
			fileId
		})) || []
	);
	const [uploadResults, setUploadResults] = useState<string[]>(value || []);

	const handleRemoveFile = useCallback(
		(fileId: string) => {
			setCompletedFiles((prev) =>
				prev.filter((f) => f.fileId !== fileId)
			);
			const newResults = uploadResults.filter(id => id !== fileId);
			setUploadResults(newResults);
			onChange?.(newResults);
		},
		[uploadResults, onChange]
	);

	const handleChange = useCallback(
		async (fileList: UploadFile | UploadFile[]) => {
			const files = Array.isArray(fileList) ? fileList : [fileList];
			console.log("files", files);
			// 验证文件对象
			if (!files.every((f) => f instanceof File)) {
				message.error("Invalid file format");
				return false;
			}

			const newFiles: UploadingFile[] = files.map((f) => ({
				name: f.name,
				progress: 0,
				status: "uploading" as const,
			}));
			setUploadingFiles((prev) => [...prev, ...newFiles]);
			const newUploadResults: string[] = [];

			try {
				for (const [index, f] of files.entries()) {
					if (!f) {
						throw new Error(`File ${f.name} is invalid`);
					}

					const fileId = await new Promise<string>(
						(resolve, reject) => {
							handleFileUpload(
								f as File,
								(result) => {
									console.log("Upload success:", result);
									const completedFile = {
										name: f.name,
										progress: 1,
										status: "done" as const,
										fileId: result.fileId,
									};
									setCompletedFiles((prev) => [
										...prev,
										completedFile,
									]);
									setUploadingFiles((prev) =>
										prev.filter((_, i) => i !== index)
									);
									resolve(result.fileId);
								},
								(error) => {
									console.error("Upload error:", error);
									reject(error);
								}
							);
						}
					);
					newUploadResults.push(fileId);
				}

				// Update with all uploaded files
				const newValue = Array.from(new Set([...uploadResults, ...newUploadResults]));
				setUploadResults(newValue);
				onChange?.(newValue);
				message.success(`${files.length} files uploaded successfully`);
			} catch (error) {
				console.error("Upload error details:", error);
				message.error(
					`Upload failed: ${error instanceof Error ? error.message : "Unknown error"}`
				);
				setUploadingFiles((prev) =>
					prev.map((f) => ({ ...f, status: "error" }))
				);
			}

			return false;
		},
		[uploadResults, onChange, handleFileUpload]
	);

	return (
		<div className="space-y-4">
			<Upload.Dragger
				name="files"
				multiple
				showUploadList={false}
				beforeUpload={handleChange}
				style={{
					border: "2px dashed #1677ff",
					borderRadius: "8px",
					backgroundColor: "#f0f8ff",
				}}>
				<p className="ant-upload-drag-icon">
					<UploadOutlined />
				</p>
				<p className="ant-upload-text">
					Click or drag file to this area to upload
				</p>
				<p className="ant-upload-hint">
					Support for a single or bulk upload of files
				</p>
			</Upload.Dragger>

			{/* Uploading Files */}
			{uploadingFiles.length > 0 && (
				<div className="space-y-2 p-4 border rounded">
					<div className="font-medium">Uploading Files</div>
					{uploadingFiles.map((file, index) => (
						<div key={index} className="flex flex-col gap-1">
							<div className="flex items-center gap-2">
								<div className="text-sm">{file.name}</div>
							</div>
							<Progress
								percent={Math.round(file.progress * 100)}
								status={
									file.status === "error"
										? "exception"
										: file.status === "done"
											? "success"
											: "active"
								}
							/>
						</div>
					))}
				</div>
			)}

			{/* Completed Files */}
			{completedFiles.length > 0 && (
				<div className="space-y-2 p-4 border rounded">
					<div className="font-medium">Uploaded Files</div>
					{completedFiles.map((file, index) => (
						<div
							key={index}
							className="flex items-center justify-between gap-2 py-2">
							<div className="flex items-center gap-2">
								<CheckCircleOutlined className="text-green-500" />
								<div className="text-sm">{file.name}</div>
							</div>
							<Button
								type="text"
								danger
								icon={<DeleteOutlined />}
								onClick={() =>
									file.fileId && handleRemoveFile(file.fileId)
								}
							/>
						</div>
					))}
				</div>
			)}
		</div>
	);
};