#include <cJSON.h>
#include <constants.h>
#include <endpoints/api_v1_controllers.h>
#include <logger.h>
#include <models/controller.h>
#include <models/tag.h>

void
api_v1_controllers_STR_GET(struct mg_connection *c, endpoint_args_t *args, struct http_message *hm)
{
    (void)hm;

    uuid_t target_uid;
    if(uuid_parse(args[0].value.v_str, target_uid))
    {
        LOG_ERROR("failed to unparse uid\n");
        mg_send_head(c, 400, 2, "Content-Type: application/json\r\n" STANDARD_HEADERS);
        mg_printf(c, "{}");
        return;
    }

    controller_t* controller = controller_get_by_uid(target_uid);

    if(!controller)
    {
        LOG_ERROR("could not find a controller for uid '%s'\n", args[0].value.v_str);
        mg_send_head(c, 404, 2, "Content-Type: application/json\r\n" STANDARD_HEADERS);
        mg_printf(c, "{}");
        return;
    }

    cJSON *json =  controller_to_json(controller);

    char *json_str = cJSON_Print(json);
    if (json_str == NULL)
    {
        LOG_ERROR("failed to print controllers json\n");
        mg_send_head(c, 500, 2, "Content-Type: application/json\r\n" STANDARD_HEADERS);
        mg_printf(c, "[]");
    }
    else
    {
        mg_send_head(c, 200, strlen(json_str), "Content-Type: application/json\r\n" STANDARD_HEADERS);
        mg_printf(c, "%s", json_str);
        free(json_str);
    }
    cJSON_Delete(json);
    controller_free(controller);
}

void
api_v1_controllers_STR_PUT(struct mg_connection *c, endpoint_args_t *args, struct http_message *hm)
{
    (void)hm;

    uuid_t target_uid;
    if(uuid_parse(args[0].value.v_str, target_uid))
    {
        LOG_ERROR("failed to unparse uid\n");
        mg_send_head(c, 400, 2, "Content-Type: application/json\r\n" STANDARD_HEADERS);
        mg_printf(c, "{}");
        return;
    }

    controller_t* controller = controller_get_by_uid(target_uid);

    if(!controller)
    {
        LOG_ERROR("could not find a controller for uid '%s'\n", args[0].value.v_str);
        mg_send_head(c, 404, 2, "Content-Type: application/json\r\n" STANDARD_HEADERS);
        mg_printf(c, "{}");
        return;
    }

    cJSON *json = cJSON_ParseWithLength(hm->body.p, hm->body.len);

    if(json == NULL)
    {
        const char *error_ptr = cJSON_GetErrorPtr();
        if (error_ptr != NULL)
        {
            LOG_ERROR("error before: %s\n", error_ptr);
        }
        cJSON_Delete(json);
        mg_send_head(c, 400, 2, "Content-Type: application/json\r\n" STANDARD_HEADERS);
        mg_printf(c, "{}");
        return;
    }

    cJSON *json_name = cJSON_GetObjectItemCaseSensitive(json, "name");
    if(cJSON_IsString(json_name) && json_name->valuestring)
    {
        strncpy(controller->name, json_name->valuestring, MAX_NAME_LENGTH);
        controller->name[MAX_NAME_LENGTH] = '\0';
    }

    cJSON *json_ip = cJSON_GetObjectItemCaseSensitive(json, "ip");
    if(cJSON_IsString(json_ip) && json_ip->valuestring)
    {
        strncpy(controller->ip, json_ip->valuestring, IP_LENGTH);
        controller->ip[IP_LENGTH] = '\0';
    }

    if(controller_save(controller))
    {
        LOG_ERROR("failed to save controller\n");
        mg_send_head(c, 500, 2, "Content-Type: application/json\r\n" STANDARD_HEADERS);
        mg_printf(c, "{}");
        free(controller);
        cJSON_Delete(json);
        return;
    }

    cJSON_Delete(json);
    json = controller_to_json(controller);

    char *json_str = cJSON_Print(json);
    if (json_str == NULL)
    {
        LOG_ERROR("failed to print controller json\n");
        mg_send_head(c, 200, 2, "Content-Type: application/json\r\n" STANDARD_HEADERS);
        mg_printf(c, "{}");
    }
    else
    {
        mg_send_head(c, 200, strlen(json_str), "Content-Type: application/json\r\n" STANDARD_HEADERS);
        mg_printf(c, "%s", json_str);
        free(json_str);
    }
    cJSON_Delete(json);
    controller_free(controller);
}

void
api_v1_controllers_STR_DELETE(struct mg_connection *c, endpoint_args_t *args, struct http_message *hm)
{
    (void)hm;

    const char *target_uid_str = args[0].value.v_str;

    uuid_t target_uid;
    if(uuid_parse(target_uid_str, target_uid))
    {
        LOG_ERROR("failed to unparse uid\n");
        mg_send_head(c, 400, 2, "Content-Type: application/json\r\n" STANDARD_HEADERS);
        mg_printf(c, "{}");
        return;
    }

    controller_t* controller = controller_get_by_uid(target_uid);

    if(!controller)
    {
        LOG_ERROR("could not find a controller for uid '%s'\n", target_uid_str);
        mg_send_head(c, 404, 2, "Content-Type: application/json\r\n" STANDARD_HEADERS);
        mg_printf(c, "{}");
        return;
    }

    if(controller_remove(controller))
    {
        mg_send_head(c, 500, 2, "Content-Type: application/json\r\n" STANDARD_HEADERS);
        mg_printf(c, "{}");
    }
    else
    {
        mg_send_head(c, 200, 2, "Content-Type: application/json\r\n" STANDARD_HEADERS);
        mg_printf(c, "{}");
    }
    controller_free(controller);
    return;
}