/*
 * DeskLock — living-room face and voice for the Tatlock butler.
 *
 * Boot sequence (planned):
 *   1. BSP init: display + LVGL, touch, audio codec (ES8311/ES7210)
 *   2. Wi-Fi up via ESP32-C6 (ESP-Hosted over SDIO)
 *   3. WebSocket connection to the DeskLock gateway
 *   4. Face state machine: idle / listening / thinking / speaking
 *
 * Current stage: bring-up — display + a placeholder face.
 */

#include <math.h>
#include <stdlib.h>

#include "esp_log.h"
#include "bsp/esp-bsp.h"
#include "esp_codec_dev.h"
#include "lvgl.h"

static const char *TAG = "desklock";

#define CHIME_RATE 16000
#define CHIME_SAMPLES (CHIME_RATE / 2) /* 0.5 s */

/* Bring-up proof for the audio path: C5 -> E5 with a fade-out. */
static void play_boot_chime(void)
{
    esp_codec_dev_handle_t spk = bsp_audio_codec_speaker_init();
    if (spk == NULL) {
        ESP_LOGW(TAG, "speaker init failed — no chime");
        return;
    }
    esp_codec_dev_sample_info_t fs = {
        .sample_rate = CHIME_RATE,
        .channel = 1,
        .bits_per_sample = 16,
    };
    esp_codec_dev_set_out_vol(spk, 70);
    esp_codec_dev_open(spk, &fs);

    int16_t *buf = malloc(CHIME_SAMPLES * sizeof(int16_t));
    if (buf != NULL) {
        float phase = 0.0f;
        for (int i = 0; i < CHIME_SAMPLES; i++) {
            float freq = (i < CHIME_SAMPLES / 2) ? 523.25f : 659.25f;
            phase += 2.0f * (float)M_PI * freq / CHIME_RATE;
            float envelope = 1.0f - (float)i / CHIME_SAMPLES;
            buf[i] = (int16_t)(sinf(phase) * 12000.0f * envelope);
        }
        esp_codec_dev_write(spk, buf, CHIME_SAMPLES * sizeof(int16_t));
        free(buf);
        ESP_LOGI(TAG, "boot chime played");
    }
    esp_codec_dev_close(spk);
}

static void show_placeholder_face(void)
{
    bsp_display_lock(0);

    lv_obj_t *scr = lv_screen_active();
    lv_obj_set_style_bg_color(scr, lv_color_black(), 0);

    lv_obj_t *eyes = lv_label_create(scr);
    lv_label_set_text(eyes, "-   -");
    lv_obj_set_style_text_color(eyes, lv_color_hex(0xADFFC8), 0);
    lv_obj_set_style_text_font(eyes, &lv_font_montserrat_48, 0);
    lv_obj_align(eyes, LV_ALIGN_CENTER, 0, -80);

    lv_obj_t *mouth = lv_label_create(scr);
    lv_label_set_text(mouth, "\\_/");
    lv_obj_set_style_text_color(mouth, lv_color_hex(0xADFFC8), 0);
    lv_obj_set_style_text_font(mouth, &lv_font_montserrat_48, 0);
    lv_obj_align(mouth, LV_ALIGN_CENTER, 0, 40);

    lv_obj_t *tag = lv_label_create(scr);
    lv_label_set_text(tag, "DESKLOCK");
    lv_obj_set_style_text_color(tag, lv_color_hex(0x2F7A4B), 0);
    lv_obj_align(tag, LV_ALIGN_CENTER, 0, 160);

    bsp_display_unlock();
}

void app_main(void)
{
    ESP_LOGI(TAG, "DeskLock starting");

    bsp_display_start();
    bsp_display_backlight_on();
    show_placeholder_face();
    play_boot_chime();

    ESP_LOGI(TAG, "DeskLock up (placeholder face)");

    /* TODO(face): full LVGL face state machine per docs/architecture.md
     * TODO(net): Wi-Fi via ESP-Hosted (C6), WebSocket to gateway
     * TODO(voice): ES7210 capture upstream, ES8311 playback downstream
     */
}