// Door buzzer detector: spectral-template matching on an I2S MEMS mic, ntfy push alerts.
#include <stdio.h>
#include "driver/gpio.h"
#include "esp_log.h"
#include "esp_timer.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "audio_in.h"
#include "board_config.h"
#include "calibration.h"
#include "config_store.h"
#include "console.h"
#include "led.h"
#include "matcher.h"
#include "notifier.h"
#include "processing.h"

static const char *TAG = "main";

// BOOT button (GPIO0, active low). A short press (30 ms .. 1 s) starts `learn`.
static void button_task(void *arg)
{
    gpio_config_t io = {
        .pin_bit_mask = 1ULL << BOOT_BTN_GPIO,
        .mode = GPIO_MODE_INPUT,
        .pull_up_en = GPIO_PULLUP_ENABLE,
    };
    if (gpio_config(&io) != ESP_OK) {
        ESP_LOGE(TAG, "button gpio_config failed");
        vTaskDelete(NULL);
    }
    int64_t down_at = 0;
    for (;;) {
        vTaskDelay(pdMS_TO_TICKS(20));
        bool down = gpio_get_level(BOOT_BTN_GPIO) == 0;
        if (down && down_at == 0) {
            down_at = esp_timer_get_time();
        } else if (!down && down_at != 0) {
            int64_t held_ms = (esp_timer_get_time() - down_at) / 1000;
            down_at = 0;
            if (held_ms >= 30 && held_ms <= 1000) {
                printf("\n[BOOT button] starting learn\n");
                calibration_run_learn(false, 0.0f);   // blocks this task only
            }
        }
    }
}

static void check(esp_err_t err, const char *what)
{
    if (err != ESP_OK) {
        ESP_LOGE(TAG, "%s failed: %s", what, esp_err_to_name(err));
    }
}

void app_main(void)
{
    ESP_ERROR_CHECK(config_init());          // also initialises NVS
    check(led_init(), "led_init");
    ESP_ERROR_CHECK(calibration_init());
    ESP_ERROR_CHECK(matcher_init());
    ESP_ERROR_CHECK(audio_in_init());
    check(notifier_init(), "notifier_init");
    ESP_ERROR_CHECK(processing_start());
    ESP_ERROR_CHECK(audio_in_start());

    if (xTaskCreate(button_task, "button", 4096, NULL, 3, NULL) != pdPASS) {
        ESP_LOGE(TAG, "button task not created");
    }

    printf("\nDoor buzzer detector ready. Type `help`.\n");
    if (!matcher_has_template()) {
        printf("NEEDS TEMPLATE. Either:\n"
               "  1) python tools/make_template.py --buzz your_recording.wav   then rebuild/flash, or\n"
               "  2) type `learn` (or short-press BOOT) and press the buzzer during the 60 s session.\n");
    }
    check(console_start(), "console_start");
}