#include <assert.h>

#include "config.h"
#include "page-api-workers.h"
#include "page.h"
#include "req.h"
#include "types.h"
#include "util.h"

static void
list(struct kreq *r, const struct worker *workers, size_t workersz)
{
	struct json_t *doc;
	char *dump;

	doc = worker_to(workers, workersz);
	dump = json_dumps(doc, JSON_COMPACT);

	khttp_puts(r, dump);
	free(dump);
	json_decref(doc);
}

static void
push(struct kreq *r, const struct worker *p)
{
	struct json_t *json;
	char *dump;

	json = worker_to(p, 1);
	dump = json_dumps(json, JSON_COMPACT);

	khttp_head(r, kresps[KRESP_CONTENT_TYPE], "%s", kmimetypes[KMIME_APP_JSON]);
	khttp_head(r, kresps[KRESP_STATUS], "%s", khttps[KHTTP_200]);
	khttp_body(r);
	khttp_puts(r, dump);
	khttp_free(r);

	free(dump);
	json_decref(json);
}

static void
get_one(struct kreq *r, const char *name)
{
	struct worker worker;
	struct req req;

	if ((req = req_worker_find(&worker, name)).status)
		page(r, NULL, KHTTP_500, KMIME_APP_JSON, NULL);
	else
		push(r, &worker);
}

static void
get_one_id(struct kreq *r, int id)
{
	struct worker worker;
	struct req req;

	if ((req = req_worker_find_id(&worker, id)).status)
		page(r, NULL, KHTTP_500, KMIME_APP_JSON, NULL);
	else
		push(r, &worker);
}

static void
get_all(struct kreq *r)
{
	struct worker workers[SCI_PROJECT_MAX];
	struct req req;
	size_t workersz = UTIL_SIZE(workers);

	if ((req = req_worker_list(workers, &workersz)).status)
		page(r, NULL, KHTTP_500, KMIME_APP_JSON, NULL);
	else {
		khttp_head(r, kresps[KRESP_CONTENT_TYPE], "%s", kmimetypes[KMIME_APP_JSON]);
		khttp_head(r, kresps[KRESP_STATUS], "%s", khttps[KHTTP_200]);
		khttp_body(r);
		list(r, workers, workersz);
		req_finish(&req);
		khttp_free(r);
	}
}

static void
get(struct kreq *r)
{
	char name[128];
	int id;

	if (sscanf(r->path, "v1/workers/%d", &id) == 1)
		get_one_id(r, id);
	else if (sscanf(r->path, "v1/workers/%127s", name) == 1)
		get_one(r, name);
	else
		get_all(r);
}

void
page_api_v1_workers(struct kreq *r)
{
	assert(r);

	switch (r->method) {
	case KMETHOD_GET:
		get(r);
		break;
	default:
		page(r, NULL, KHTTP_400, KMIME_APP_JSON, NULL);
		break;
	}
}