import { Request, RequestOptions, RequestSuccess, RequestFail, RequestTask } from './interface';
import { NetworkManager, NetworkRequestListener } from './network/NetworkManager.uts'
import { Data, HTTPURLResponse, NSError, NSNumber , ComparisonResult } from 'Foundation';
import { StatusCode } from './network/StatusCode.uts';

class SimpleNetworkListener extends NetworkRequestListener {
	private param : RequestOptions | null = null;
	private headers : Map<string, any> | null = null;
	private received : number = 0;
	private data : Data = new Data();
	constructor(param : RequestOptions) {
		this.param = param;
		super();
	}

	public override onStart() : void {
	}

	public override onHeadersReceived(statusCode : number, headers : Map<string, any>) : void {
		this.headers = headers;
	}
	public override onDataReceived(data : Data) : void {
		this.received += data.count;
		this.data.append(data);
	}

	public override onFinished(response : HTTPURLResponse) : void {
		try {
			let headers = response.allHeaderFields as Map<string, any>;
			let kParam = this.param;
			let result = {};
			result['statusCode'] = response.statusCode;
			result['statusText'] = StatusCode.getStatus(new String(response.statusCode));
			if (headers != null) {
				result['header'] = headers;
			}
			let strData = this.readStringFromData(this.data, response.textEncodingName);


			let type = kParam?.responseType != null ? kParam?.responseType : kParam?.dataType;

			if (type == null && headers != null) {
				
				for (entry in headers){
					let key = entry.key;
					if (key.caseInsensitiveCompare("Content-Type") == ComparisonResult.orderedSame) {
						type = headers[key] as string;
					}
				}
			}
			

			result['data'] = this.parseData(this.data, strData, type);

			let tmp : RequestSuccess = {
				data: result['data']!,
				statusCode: (new NSNumber(value = response.statusCode)),
				header: result['header'] ?? "",
				cookies: []
			};
			let success = kParam?.success;
			let complete = kParam?.complete;
			success?.(tmp);
			complete?.(tmp);

		} catch (e) {
		}
	}

	public override onFail(error : NSError) : void {

		let kParam = this.param;
		let result = {};
		let code = (error as NSError).code;
		// result['data'] = error.localizedDescription + "(" + new String(code) + ")";
		// result['errorMsg'] = error.localizedDescription + "(" + new String(code) + ")";
		// result['statusText'] = StatusCode.getStatus(new String(code) + "");
		// if (this.headers != null) {
		// 	result['header'] = this.headers;
		// }

		let errCode = code;
		let errMsg = error.localizedDescription;
		if (code == -1001) {
			errCode = 5;
		} else if (code == -1004) {
			errCode = 1000;
		} else if (code == -1009) {
			errCode = 600003;
		} else if (code == -1000 || code == -1002 || code == -1003) {
			errMsg = 'ERR_INVALID_REQUEST';
		}


		// let failResult : RequestFail = {
		// 	errSubject: "uni-request",
		// 	errMsg: errMsg,
		// 	errCode: errCode,
		// };
		let failResult : RequestFail = new UniError("uni-request", Number.from(errCode), errMsg);

		let fail = kParam?.fail;
		let complete = kParam?.complete;
		fail?.(failResult);
		complete?.(failResult);
	}


	private readStringFromData(data : Data, type : string | null) : string | null {
		let result : string | null = null;
		let finalType = type;
		if (finalType == null || finalType!.length == 0) {
			finalType = "utf-8";
		}

		let cfEncoding = CFStringConvertIANACharSetNameToEncoding(finalType as CFString);
		if (cfEncoding != kCFStringEncodingInvalidId) {
			let stringEncoding = CFStringConvertEncodingToNSStringEncoding(cfEncoding);
			let encode = new String.Encoding(rawValue = stringEncoding);
			result = new String(data = data, encoding = encode);
		}
		return result;
	}

	private parseData(data : Data | null, dataStr : string | null, type : string | null) : any | null {
		if (type != null && type!.contains("json")) {
			if (dataStr == null || dataStr!.length == 0) {
				return {};
			}
			return this.parseJson(dataStr!);
		} else if (type == 'jsonp') {
			if (dataStr == null || dataStr!.length == 0) {
				return {};
			}
			let start = dataStr!.indexOf('(');
			let end = dataStr!.indexOf(')');
			if (start == 0 || start >= end) {
				return {};
			}
			start += 1;
			let tmp = dataStr!.slice(start, end);
			return this.parseJson(tmp);
		} else {
			//dataStr如果解码失败是空的时候，还需要继续尝试解码。极端情况，服务器不是utf8的，所以字符解码会出现乱码，所以特殊处理一下非utf8的字符。
			if (data == null) {
				return data;
			}

			let currentStr : string | null = dataStr;
			//todo 等uts支持swift文件混编的时候，再进行处理。
			// if (currentStr == null) {
			// 	let data = cleanUTF8(data);
			// 	if (data != null) {
			// 		currentStr = new String(data = data, encoding = String.Encoding.utf8);
			// 	}
			// }

			if (currentStr == null) {
				currentStr = new String(data = data!, encoding = String.Encoding.ascii);
			}

			return currentStr;
		}
	}


	private parseJson(str : string) : any | null{
		return JSON.parse(str);
	}
}


export const request : Request = (param : RequestOptions) : RequestTask | null => {
	return NetworkManager.getInstance().request(param, new SimpleNetworkListener(param));
}