#include <stdio.h>
#include "workflow/WFTaskFactory.h"
#include "workflow/WFGraphTask.h"
#include "workflow/HttpMessage.h"
#include "workflow/WFFacilities.h"

using namespace protocol;

static WFFacilities::WaitGroup wait_group(1);

void go_func(const size_t *size1, const size_t *size2)
{
	printf("page1 size = %zu, page2 size = %zu\n", *size1, *size2);
}

void http_callback(WFHttpTask *task)
{
	size_t *size = (size_t *)task->user_data;
	const void *body;

	if (task->get_state() == WFT_STATE_SUCCESS)
		task->get_resp()->get_parsed_body(&body, size);
	else
		*size = (size_t)-1;
}

#define REDIRECT_MAX	3
#define RETRY_MAX		1

int main()
{
	WFTimerTask *timer;
	WFHttpTask *http_task1;
	WFHttpTask *http_task2;
	WFGoTask *go_task;
	size_t size1;
	size_t size2;

	timer = WFTaskFactory::create_timer_task(1000000, [](WFTimerTask *) {
		printf("timer task complete(1s).\n");
	});

	/* Http task1 */
	http_task1 = WFTaskFactory::create_http_task("https://www.sogou.com/",
												 REDIRECT_MAX, RETRY_MAX,
												 http_callback);
	http_task1->user_data = &size1;

	/* Http task2 */
	http_task2 = WFTaskFactory::create_http_task("https://www.baidu.com/",
												 REDIRECT_MAX, RETRY_MAX,
												 http_callback);
	http_task2->user_data = &size2;

	/* go task will print the http pages size */
	go_task = WFTaskFactory::create_go_task("go", go_func, &size1, &size2);

	/* Create a graph. Graph is also a kind of task */
	WFGraphTask *graph = WFTaskFactory::create_graph_task([](WFGraphTask *) {
		printf("Graph task complete. Wakeup main process\n");
		wait_group.done();
	});

	/* Create graph nodes */
	WFGraphNode& a = graph->create_graph_node(timer);
	WFGraphNode& b = graph->create_graph_node(http_task1);
	WFGraphNode& c = graph->create_graph_node(http_task2);
	WFGraphNode& d = graph->create_graph_node(go_task);

	/* Build the graph */
	a-->b;
	a-->c;
	b-->d;
	c-->d;

	graph->start();
	wait_group.wait();
	return 0;
}