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/*******************************************************************************
 *
 * MIT License
 *
 * Copyright (c) 2016 Tiago de Freitas Lima
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 *******************************************************************************/
package com.github.ljtfreitas.restify.http.client.request;

import java.net.URI;
import java.net.URISyntaxException;
import java.util.Optional;

import com.github.ljtfreitas.restify.http.client.HttpException;
import com.github.ljtfreitas.restify.http.client.message.Cookies;
import com.github.ljtfreitas.restify.http.client.message.Header;
import com.github.ljtfreitas.restify.http.client.message.Headers;
import com.github.ljtfreitas.restify.http.contract.metadata.EndpointMethod;
import com.github.ljtfreitas.restify.reflection.JavaType;

public class EndpointRequestFactory {

	public EndpointRequest createWith(EndpointMethod endpointMethod, Object[] args) {
		return newRequest(endpointMethod, args, endpointMethod.returnType());
	}

	public EndpointRequest createWith(EndpointMethod endpointMethod, Object[] args, JavaType responseType) {
		return newRequest(endpointMethod, args, responseType);
	}

	private EndpointRequest newRequest(EndpointMethod endpointMethod, Object[] args, JavaType responseType) {
		try {
			URI endpoint = endpointMethod.expand(args);

			Object body = bodyOf(endpointMethod, args);

			Headers headers = headersOf(endpointMethod, args);

			EndpointVersion version = endpointMethod.version().map(EndpointVersion::of).orElse(null);

			EndpointRequestMetadata metadata = new EndpointRequestMetadata(endpointMethod.metadata().all());

			return new EndpointRequest(endpoint, endpointMethod.httpMethod(), headers, body, responseType, version, metadata);

		} catch (URISyntaxException e) {
			throw new HttpException(e);
		}
	}

	private Object bodyOf(EndpointMethod endpointMethod, Object[] args) {
		return endpointMethod.parameters()
				.body()
					.map(p -> args[p.position()]).orElse(null);
	}

	private Headers headersOf(EndpointMethod endpointMethod, Object[] args) {
		Headers headers = endpointMethod.headers().all()
				.stream()
					.reduce(new Headers(), (a, b) -> a.add(new Header(b.name(), b.value())), (a, b) -> b)
				.addAll(endpointMethod.parameters().header()
						.stream()
							.reduce(new Headers(),
									(a, b) -> a.add(new Header(b.name(), b.resolve(args[b.position()]))), (a, b) -> b));

		return cookiesOf(endpointMethod, args)
				.map(headers::add)
					.orElse(headers);
	}

	private Optional cookiesOf(EndpointMethod endpointMethod, Object[] args) {
		Cookies cookies = endpointMethod.parameters().cookie()
			.stream()
				.reduce(new Cookies(),
						(a, b) -> a.add(b.name(), b.resolve(args[b.position()])), (a, b) -> b);

		return cookies.empty() ? Optional.empty() : Optional.of(Header.cookie(cookies));
	}
}