#include <string.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include <stdio.h>
#include "nvs_flash.h"

#include "lwip/err.h"
#include "lwip/sys.h"

#include "esp_wifi.h"
#include "esp_log.h"
#include "esp_vfs_fat.h"

#include "APlib.h"
#include "HTTPServe.h"
#include "ledController.h"
#include "scd4x_i2c.h"
#include "sensirion_i2c_hal.h"

struct fetch_sensor_config {
	uint16_t delay;
	uint16_t co2;
	int32_t temperature;
	int32_t humidity;
};
typedef struct fetch_sensor_config fetch_sensor_config_t;

void fetch_sensor_task(void* pvParameters){
	fetch_sensor_config_t* conf = (fetch_sensor_config_t*) pvParameters;
	while(1){
		vTaskDelay(conf->delay * 1000 / portTICK_PERIOD_MS);
		int16_t error = scd4x_read_measurement(&conf->co2, &conf->temperature, &conf->humidity);
                if (error)
                        ESP_LOGE("sensor fetch", "Error executing scd4x_read_measurement(): %i\n", error);
	}
}
void app_main(void){
	// init LEDs driver
	led_disp_config_t led_configs[] = {
		[0] = {
			.output = 4,
			.min = 1500,
			.max = 10000,
			.intensity = 100,
			.blink_duty_cycle = 1,
			.blink_delay = 255,
		},
		[1] = {
			.output = 5,
			.min = 700,
			.max = 1499,
			.intensity = 100,
			.blink_duty_cycle = 1,
			.blink_delay = 255,
		},
		[2] = {
			.output = 6,
			.min = 0,
			.max = 699,
			.intensity = 100,
			.blink_duty_cycle = 1,
			.blink_delay = 255,
		},
	};

	init_led_driver(led_configs, sizeof(led_configs)/sizeof(led_disp_config_t));

	// init wifi AP (and nvs)
	esp_err_t ret = nvs_flash_init();
	if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
		ESP_ERROR_CHECK(nvs_flash_erase());
		ret = nvs_flash_init();
	}
	ESP_ERROR_CHECK(ret);
	wifi_config_t wifi_config = wifi_config_generator("CO2Sense","testtest",1);

	wifi_init_softap(wifi_config);
	
	// mount http server fat partition
	const esp_vfs_fat_mount_config_t mount_config = {
            .max_files = 10,
            .format_if_mount_failed = false,
            .allocation_unit_size = CONFIG_WL_SECTOR_SIZE
    	};
    	esp_err_t err;
        err = esp_vfs_fat_rawflash_mount("/http", "http", &mount_config);

    	if (err != ESP_OK) {
        	ESP_LOGE("MAIN", "Failed to mount FATFS (%s)", esp_err_to_name(err));
        	return;
    	}
	
	// start http server
	HTTP_serve_config_t serv_config = {
		.mountpoint = "/http",
		.getUri = "/*",
		.postUri = "/*",
	};

	ESP_ERROR_CHECK(start_server(serv_config));
	
	// init scd41 sensor
	sensirion_i2c_hal_init(0,1);

        scd4x_wake_up();
        scd4x_stop_periodic_measurement();
        scd4x_reinit();
	
	int16_t error = scd4x_start_periodic_measurement();
        if (error) {
                ESP_LOGE("MAIN", "Error executing scd4x_start_periodic_measurement(): %i\n",error);
        }
	
	// start fetch sensor task
	
	fetch_sensor_config_t sensor_conf = {
		.delay = 5,
		.co2 = 0,
		.temperature = 0,
		.humidity = 0,
	};
	TaskHandle_t sensor_fetch_handle;
	xTaskCreate(fetch_sensor_task, "FETCH_SENSOR", 4096, &sensor_conf, tskIDLE_PRIORITY, &sensor_fetch_handle);

	while(1){
		vTaskDelay(1000 / portTICK_PERIOD_MS);
		ESP_LOGI("MAIN", "co2 : %u ppm, temp : %d m°C, hum : %d mRH", sensor_conf.co2, sensor_conf.temperature, sensor_conf.humidity);
		update_led_status(led_configs, sizeof(led_configs)/sizeof(led_disp_config_t), sensor_conf.co2);
	}
}