#include "lfk78.h"

#include <avr/timer_avr.h>
#include <avr/wdt.h>
#include <audio/audio.h>
#include "issi.h"
#include "TWIlib.h"
#include "lighting.h"

uint16_t click_hz = CLICK_HZ;
uint16_t click_time = CLICK_MS;
uint8_t click_toggle = CLICK_ENABLED;

__attribute__((weak))
const Layer_Info layer_info[] = {
    // Layer      Mask          Red     Green   Blue
    { 0x00000000, 0xFFFFFFFF, { 0x0000, 0x0FFF, 0x0000 } }, // base layer - green
    { 0x00000002, 0xFFFFFFFE, { 0x0000, 0x0000, 0x0FFF } }, // function layer - blue
    { 0x00000004, 0xFFFFFFFC, { 0x0FFF, 0x0000, 0x0FFF } }, // settings layer - magenta
    { 0xFFFFFFFF, 0xFFFFFFFF, { 0x0FFF, 0x0FFF, 0x0FFF } }  // unknown layer - REQUIRED - white
};

void matrix_init_kb(void) {
    matrix_init_user();

    // Configure the Layer LED
    // Set up 16 bit PWM: Fast PWM, mode 14, inverted
    TCCR1A = _BV(COM1A1) | _BV(COM1A0) | _BV(COM1B1) | _BV(COM1B0) | _BV(COM1C1) | _BV(COM1C0) | _BV(WGM11);
    TCCR1B = _BV(WGM13) | _BV(WGM12) | _BV(CS10);
    ICR1 = 0xFFFF;
    // PWM values - 0xFFFF = off, 0x0000 = max
    OCR1A = 0x0FFF; // B5 - Red
    OCR1B = 0x0000; // B6 - Green
    OCR1C = 0x0000; // B7 - Blue
    // Set as output
    setPinOutput(B5);
    setPinOutput(B6);
    setPinOutput(B7);

#ifndef AUDIO_ENABLE
    // If we're not using the audio pin, drive it low
    setPinOutput(C6);
    writePinLow(C6);
#endif

#ifdef ISSI_ENABLE
    issi_init();
#endif

#ifdef WATCHDOG_ENABLE
    // This is done after turning the layer LED red, if we're caught in a loop
    // we should get a flashing red light
    wdt_enable(WDTO_500MS);
#endif
}

void matrix_scan_kb(void) {
#ifdef WATCHDOG_ENABLE
    wdt_reset();
#endif

#ifdef ISSI_ENABLE
    // switch/underglow lighting update
    static uint32_t issi_device = 0;
    static uint32_t twi_last_ready = 0;

    if (twi_last_ready > 1000) {
        // It's been way too long since the last ISSI update, reset the I2C bus and start again
        dprintf("TWI failed to recover, TWI re-init\n");
        twi_last_ready = 0;
        TWIInit();
        force_issi_refresh();
    }

    if (isTWIReady()) {
        twi_last_ready = 0;
        // If the i2c bus is available, kick off the issi update, alternate between devices
        update_issi(issi_device, issi_device);

        if (issi_device) {
            issi_device = 0;
        } else {
            issi_device = 3;
        }
    } else {
        twi_last_ready++;
    }
#endif

    // Update layer indicator LED
    //
    // Not sure how else to reliably do this... TMK has the 'hook_layer_change'
    // but can't find QMK equiv
    static uint32_t layer_indicator = -1;

    if (layer_indicator != layer_state) {
        for (uint32_t i = 0; ; i++) {
            // the layer_info list should end with layer 0xFFFFFFFF
            // it will break this out of the loop and define the unknown layer color
            if ((layer_info[i].layer == (layer_state & layer_info[i].mask)) || (layer_info[i].layer == 0xFFFFFFFF)) {
                OCR1A = layer_info[i].color.red;
                OCR1B = layer_info[i].color.green;
                OCR1C = layer_info[i].color.blue;
                layer_indicator = layer_state;
                break;
            }
        }
    }

    matrix_scan_user();
}

void click(uint16_t freq, uint16_t duration) {
#ifdef AUDIO_ENABLE
    if (freq >= 100 && freq <= 20000 && duration < 100) {
        play_note(freq, 10);
        for (uint16_t i = 0; i < duration; i++) {
            _delay_ms(1);
        }
        stop_all_notes();
    }
#endif
}

bool process_record_kb(uint16_t keycode, keyrecord_t* record) {
    if (click_toggle && record->event.pressed) {
        click(click_hz, click_time);
    }

    if (keycode == RESET) {
        reset_keyboard_kb();
    }

    return process_record_user(keycode, record);
}

void action_function(keyrecord_t *event, uint8_t id, uint8_t opt) {
#ifdef AUDIO_ENABLE
    int8_t sign = 1;
#endif

    if (id == LFK_ESC_TILDE) {
        // Send ~ on shift-esc
        void (*method)(uint8_t) = (event->event.pressed) ? &add_key : &del_key;
        uint8_t shifted = get_mods() & (MOD_BIT(KC_LSHIFT) | MOD_BIT(KC_RSHIFT));

        if (layer_state == 0) {
            method(shifted ? KC_GRAVE : KC_ESCAPE);
        } else {
            method(shifted ? KC_ESCAPE : KC_GRAVE);
        }

        send_keyboard_report();
    } else if (event->event.pressed) {
        switch (id) {
            case LFK_SET_DEFAULT_LAYER:
                // set/save the current base layer to eeprom, falls through to LFK_CLEAR
                eeconfig_update_default_layer(1UL << opt);
                default_layer_set(1UL << opt);
            case LFK_CLEAR:
                // Go back to default layer
                layer_clear();
                break;
#ifdef ISSI_ENABLE
            case LFK_LED_TEST:
                led_test();
                break;
#endif
#ifdef AUDIO_ENABLE
            case LFK_CLICK_FREQ_LOWER:
                sign = -1; // continue to next statement
            case LFK_CLICK_FREQ_HIGHER:
                click_hz += sign * 100;
                click(click_hz, click_time);
                break;
            case LFK_CLICK_TOGGLE:
                if (click_toggle) {
                    click_toggle = 0;
                    click(4000, 100);
                    click(1000, 100);
                } else {
                    click_toggle = 1;
                    click(1000, 100);
                    click(4000, 100);
                }
                break;
            case LFK_CLICK_TIME_SHORTER:
                sign = -1; // continue to next statement
            case LFK_CLICK_TIME_LONGER:
                click_time += sign;
                click(click_hz, click_time);
                break;
#endif
            case LFK_DEBUG_SETTINGS:
                dprintf("Click:\n");
                dprintf("  toggle: %d\n", click_toggle);
                dprintf("  freq(hz): %d\n", click_hz);
                dprintf("  duration(ms): %d\n", click_time);
                break;
        }
    }
}

void reset_keyboard_kb() {
#ifdef WATCHDOG_ENABLE
    MCUSR = 0;
    wdt_disable();
    wdt_reset();
#endif

    OCR1A = 0x0000; // B5 - Red
    OCR1B = 0x0FFF; // B6 - Green
    OCR1C = 0x0FFF; // B7 - Blue

    reset_keyboard();
}

void led_set_kb(uint8_t usb_led) {
    // put your keyboard LED indicator (ex: Caps Lock LED) toggling code here
#ifdef ISSI_ENABLE
#    ifdef CAPSLOCK_LED
    if (usb_led & (1 << USB_LED_CAPS_LOCK)) {
        activateLED(0, 3, 7, 255);
    } else {
        activateLED(0, 3, 7, 0);
    }
#    endif // CAPSLOCK_LED
#endif // ISS_ENABLE

    led_set_user(usb_led);
}

// LFK lighting info
const uint8_t switch_matrices[] = { 0, 1 };
const uint8_t rgb_matrices[] = { 6, 7 };
const uint8_t rgb_sequence[] = {
    12, 11, 10, 9, 16, 32, 31, 30, 28, 25, 24, 22, 21,
    20, 19, 18, 17, 1, 2, 3, 4, 5, 6, 7, 8, 14, 13
};

// Maps switch LEDs from Row/Col to ISSI matrix.
// Value breakdown:
//     Bit     | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
//            /    \ ISSI Col  |    ISSI Row   |
//          matrix idx
const uint8_t switch_leds[MATRIX_ROWS][MATRIX_COLS] = LAYOUT(
    0x19, 0x18,   0x17, 0x16, 0x15, 0x14, 0x13, 0x12, 0x11, 0x99, 0x98, 0x97, 0x96, 0x95, 0x94,   0x93,   0x92, 0x91,
    0x29, 0x28,    0x27,  0x26, 0x25, 0x24, 0x23, 0x22, 0x21, 0xA9, 0xA8, 0xA7, 0xA6, 0xA5, 0xA4, 0xA3,   0xA2, 0xA1,
    0x39, 0x38,      0x37,  0x36, 0x35, 0x34, 0x33, 0x32, 0x31, 0xB9, 0xB8, 0xB7, 0xB6, 0xB5,     0xB3,
    0x49, 0x48,    0x47,     0x45, 0x44, 0x43, 0x42, 0x41, 0xC9, 0xC8, 0xC7, 0xC6, 0xC5,          0xC4,   0xC2,
    0x59, 0x58,   0x57,  0x56,  0x55,             0x51,                   0xD6, 0xE5, 0xE4,         0xE3, 0xE2, 0xE1
);