#include "esp_log.h"
#include "esp_check.h"

#include "relay.h"
#include "routes.h"

static const char *TAG = "routes/relay";

/**
 * \remark defaults to 4
 */
#define GPIO_RELAY_PIN (gpio_num_t)CONFIG_SHELLSP_RELAY_PIN

#if !CONFIG_IDF_TARGET_LINUX
#include "driver/gpio.h"

/**
 * @return initialized relay pin configuration
 */
static gpio_config_t* get_gpio(void)
{
    static gpio_config_t io_conf;

    if (!io_conf.pin_bit_mask)
    {
        //disable interrupt
        io_conf.intr_type = GPIO_INTR_DISABLE;
        //set as output mode
        io_conf.mode = GPIO_MODE_OUTPUT;
        //bit mask of the pins that you want to set,e.g. GPIO4
        io_conf.pin_bit_mask = (1ULL << GPIO_RELAY_PIN);
        //disable pull-down mode
        io_conf.pull_down_en = GPIO_PULLDOWN_DISABLE;
        //disable pull-up mode
        io_conf.pull_up_en = GPIO_PULLUP_ENABLE;
        //configure GPIO with the given settings
        ESP_ERROR_CHECK(gpio_config(&io_conf));
    }

    return &io_conf;
}
#else /* CONFIG_IDF_TARGET_LINUX */

#define gpio_set_level(...)
#define gpio_get_level(...) 0

#endif



/**
 * Handles requests for the `/relay/0` endpoint
 */
esp_err_t relay_handler(httpd_req_t *req)
{
    char* resp = NULL;

#if !CONFIG_IDF_TARGET_LINUX
    get_gpio();
#endif

    size_t query_len = httpd_req_get_url_query_len(req) + 1;
    if (query_len > 1)
    {
        char* buf = (char*)malloc(query_len);
        ESP_RETURN_ON_FALSE(buf, ESP_ERR_NO_MEM, TAG, "buffer alloc failed");

        if (httpd_req_get_url_query_str(req, buf, query_len) == ESP_OK) {
            char param[8];

            if (httpd_query_key_value(buf, "turn", param, sizeof(param)) == ESP_OK) {

                if (!strcmp("on", param))
                {
                    ESP_LOGD(TAG, "Turned GPIO %i on", GPIO_RELAY_PIN);
                    state = 1;
                    gpio_set_level(GPIO_RELAY_PIN, state);
                }
                else if (!strcmp("off", param))
                {
                    ESP_LOGD(TAG, "Turned GPIO %i off", GPIO_RELAY_PIN);
                    state = 0;
                    gpio_set_level(GPIO_RELAY_PIN, state);
                }
                else if (!strcmp("toggle", param))
                {
                    state = !state;
                    ESP_LOGD(TAG, "Toggled GPIO %i", GPIO_RELAY_PIN);
                    gpio_set_level(GPIO_RELAY_PIN, state);
                }
                else
                {
                    resp = strdup("Bad turn!");
                }
            }

            if (httpd_query_key_value(buf, "timer", param, sizeof(param)) == ESP_OK) {
                ESP_LOGI(TAG, "Found URL query parameter => timer=%s", param);
            }
        }

        free(buf);
    }

    if (!resp)
    {
        httpd_resp_set_type(req, "application/json");
        resp = relay_json();
        ESP_RETURN_ON_FALSE(resp, ESP_ERR_NO_MEM, TAG, "buffer alloc failed");
    }

    httpd_resp_sendstr(req, resp);

    free(resp);

    return ESP_OK;
}