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#include QMK_KEYBOARD_H
#include "debug.h"
#include "action_layer.h"
#include "eeconfig.h"
#include "eeprom.h"

#define LAYER_ON(pos) ((layer_state) & (1<<(pos)))
#define _______ KC_TRNS

#define EECONFIG_BELAK_MAGIC (uint16_t)0xBE42

// NOTE: This is just a number that's a bit beyond the end of what's already
// defined. As there is no other define we can base this on, it may need to be
// changed in the future. The initial value here is used as a placeholder with a
// magic word, similar to the normal eeconfig. Note that all the storage being
// used needs to fit inside the 32 bytes of the Ergodox Infinity.
#define EECONFIG_BELAK (uint16_t *)16

// The correct way to do this would be how the normal eeconfig handles it and
// use a bitfield. However, the eeprom has a ton of space which isn't being
// used so I don't really care and have a separate byte for every setting.
#define EECONFIG_BELAK_SWAP_GUI_CTRL (uint8_t *)18

static uint8_t swap_gui_ctrl = 0;
static uint8_t td_led_override = 0;

enum belak_keycodes {
    // Function codes
    BEL_F0 = SAFE_RANGE,
    BEL_F1,

    E_SHRUG,
    E_TFLIP,
    E_TSET,
};

inline void tap(uint16_t keycode) {
    register_code(keycode);
    unregister_code(keycode);
};

// TODO: Add LED support to the tap dance by using the advanced macro
#define LTOGGLE TD(TD_LAYER_TOGGLE)

#define BASE 0 // default layer
#define SYMB 1 // symbols
#define NUMP 2 // numpad
#define SWPH 3 // swap gui/ctrl on the hands

enum belak_td {
    TD_LAYER_TOGGLE = 0,
};

void belak_td_each(qk_tap_dance_state_t *state, void *user_data);
void belak_td_finished(qk_tap_dance_state_t *state, void *user_data);
void belak_td_reset(qk_tap_dance_state_t *state, void *user_data);

qk_tap_dance_action_t tap_dance_actions[] = {
    [TD_LAYER_TOGGLE] = ACTION_TAP_DANCE_FN_ADVANCED(belak_td_each, belak_td_finished, belak_td_reset),
};

const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
/* Keymap 0: Basic layer
 *
 * ,--------------------------------------------------.           ,--------------------------------------------------.
 * |   Esc  |   1  |   2  |   3  |   4  |   5  |  L1  |           |  L2  |   6  |   7  |   8  |   9  |   0  |   =    |
 * |--------+------+------+------+------+-------------|           |------+------+------+------+------+------+--------|
 * |   Tab  |   Q  |   W  |   E  |   R  |   T  |  [   |           |   ]  |   Y  |   U  |   I  |   O  |   P  |   -    |
 * |--------+------+------+------+------+------|      |           |      |------+------+------+------+------+--------|
 * |    \   |   A  |   S  |   D  |   F  |   G  |------|           |------|   H  |   J  |   K  |   L  |   ;  |   '    |
 * |--------+------+------+------+------+------| LGui |           | RGui |------+------+------+------+------+--------|
 * | LShift |   Z  |   X  |   C  |   V  |   B  |      |           |      |   N  |   M  |   ,  |   .  |   /  | RShift |
 * `--------+------+------+------+------+-------------'           `-------------+------+------+------+------+--------'
 *   |Layers| LCtrl| Left | Right| LAlt |                                       | RAlt | Up   | Down | RCtrl|Layers|
 *   `----------------------------------'                                       `----------------------------------'
 *                                        ,-------------.       ,--------------.
 *                                        |  ~L2 | Ins  |       | Grv  | ~L1   |
 *                                ,-------|------|------|       |------+-------+-------.
 *                                | Back  |      | Home |       | PgUp |       |       |
 *                                | Space | Del  |------|       |------| Enter | Space |
 *                                |       |      | End  |       | PgDn |       |       |
 *                                `---------------------'       `----------------------'
 */
    [BASE] = LAYOUT_ergodox(  // layer 0 : default
        // left hand
        KC_ESC,         KC_1,         KC_2,   KC_3,   KC_4,   KC_5,   TG(SYMB),
        KC_TAB,         KC_Q,         KC_W,   KC_E,   KC_R,   KC_T,   KC_LBRC,
        CTL_T(KC_BSLS), KC_A,         KC_S,   KC_D,   KC_F,   KC_G,
        KC_LSFT,        KC_Z,         KC_X,   KC_C,   KC_V,   KC_B,   KC_LGUI,
        LTOGGLE,        KC_LCTRL,     KC_LEFT,KC_RGHT,KC_LALT,
                                                     MO(NUMP),KC_INS,
                                                              KC_HOME,
                                 CTL_T(KC_BSPC),GUI_T(KC_DEL),KC_END,
        // right hand
        TG(NUMP),    KC_6,   KC_7,   KC_8,   KC_9,   KC_0,             KC_EQL,
        KC_RBRC,     KC_Y,   KC_U,   KC_I,   KC_O,   KC_P,             KC_MINS,
                     KC_H,   KC_J,   KC_K,   KC_L,   KC_SCLN,          KC_QUOT,
        KC_RGUI,     KC_N,   KC_M,   KC_COMM,KC_DOT, KC_SLSH,          KC_RSFT,
                             KC_RALT,KC_UP,  KC_DOWN,KC_RCTRL,         LTOGGLE,
        KC_GRV,      MO(SYMB),
        KC_PGUP,
        KC_PGDN,     GUI_T(KC_ENT), CTL_T(KC_SPC)
    ),
/* Keymap 1: Symbol Layer
 *
 * ,--------------------------------------------------.           ,--------------------------------------------------.
 * |        |  F1  |  F2  |  F3  |  F4  |  F5  |      |           |      |  F6  |  F7  |  F8  |  F9  |  F10 |   F11  |
 * |--------+------+------+------+------+-------------|           |------+------+------+------+------+------+--------|
 * |        |   !  |   @  |   {  |   }  |   |  |      |           |      |   Up |      |  Up  |      |      |   F12  |
 * |--------+------+------+------+------+------| TFLIP|           | TSET |------+------+------+------+------+--------|
 * |        |   #  |   $  |   (  |   )  |   `  |------|           |------| Down | Left | Down | Rght |      |        |
 * |--------+------+------+------+------+------|      |           |      |------+------+------+------+------+--------|
 * |        |   %  |   ^  |   [  |   ]  |   ~  | SHRUG|           |      |   &  |      |      |      |      |        |
 * `--------+------+------+------+------+-------------'           `-------------+------+------+------+------+--------'
 *   |LClear|      |      |      |      |                                       |      |      |      |      |LClear|
 *   `----------------------------------'                                       `----------------------------------'
 *                                        ,-------------.       ,-------------.
 *                                        | TOGL |      |       |      | TOGL |
 *                                 ,------|------|------|       |------+------+------.
 *                                 |      |      |      |       |      |      |      |
 *                                 |      |      |------|       |------|      |      |
 *                                 |      |      |      |       |      |      |      |
 *                                 `--------------------'       `--------------------'
 */
    [SYMB] = LAYOUT_ergodox(
        // left hand
        _______, KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   E_TFLIP,
        _______, KC_EXLM, KC_AT,   KC_LCBR, KC_RCBR, KC_PIPE, E_TSET,
        _______, KC_HASH, KC_DLR,  KC_LPRN, KC_RPRN, KC_GRV,
        _______, KC_PERC, KC_CIRC, KC_LBRC, KC_RBRC, KC_TILD, E_SHRUG,
        BEL_F1,  _______, _______, _______, _______,
                                                     BEL_F0,  _______,
                                                              _______,
                                            _______, _______, _______,
        // right hand
        _______, KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,
        _______, KC_UP,   _______, KC_UP,   _______, _______, KC_F12,
                 KC_DOWN, KC_LEFT, KC_DOWN, KC_RGHT, _______, _______,
        _______, KC_AMPR, _______, _______, _______, _______, _______,
                          _______, _______, _______, _______, BEL_F1,
        _______, BEL_F0,
        _______,
        _______, _______, _______
    ),
/* Keymap 2: Numpad Layer
 *
 * ,--------------------------------------------------.           ,--------------------------------------------------.
 * |        |      |      |      |      |      |      |           |      |      |      |      |      |      |        |
 * |--------+------+------+------+------+-------------|           |------+------+------+------+------+------+--------|
 * |        |      |      |      |      |      |      |           |      |      |   7  |   8  |   9  |   *  |        |
 * |--------+------+------+------+------+------|      |           |      |------+------+------+------+------+--------|
 * |        |      |      |      |      |      |------|           |------|      |   4  |   5  |   6  |   +  |        |
 * |--------+------+------+------+------+------|      |           |      |------+------+------+------+------+--------|
 * |        |      |      |      |      |      |      |           |      |      |   1  |   2  |   3  |   \  |        |
 * `--------+------+------+------+------+-------------'           `-------------+------+------+------+------+--------'
 *   |LClear|      |      |      |      |                                       |   0  |    0 |   .  |   =  |LClear|
 *   `----------------------------------'                                       `----------------------------------'
 *                                        ,-------------.       ,-------------.
 *                                        | TOGL |      |       |      | TOGL |
 *                                 ,------|------|------|       |------+------+------.
 *                                 |      |      |      |       |      |      |      |
 *                                 |      |      |------|       |------|      |      |
 *                                 |      |      |      |       |      |      |      |
 *                                 `--------------------'       `--------------------'
 */
    [NUMP] = LAYOUT_ergodox(
        // left hand
        _______, _______, _______, _______, _______, _______, _______,
        _______, _______, _______, _______, _______, _______, _______,
        _______, _______, _______, _______, _______, _______,
        _______, _______, _______, _______, _______, _______, _______,
        BEL_F1,  _______, _______, _______, _______,
                                                     BEL_F0,  _______,
                                                              _______,
                                            _______, _______, _______,
        // right hand
        _______, _______, _______, _______, _______, _______, _______,
        _______, _______, KC_7,    KC_8,    KC_9,    KC_ASTR, _______,
                 _______, KC_4,    KC_5,    KC_6,    KC_PLUS, _______,
        _______, _______, KC_1,    KC_2,    KC_3,    KC_BSLS, _______,
                          KC_0,    KC_0,    KC_DOT,  KC_EQL,  BEL_F1,
        _______, BEL_F0,
        _______,
        _______, _______, _______
    ),
/* Keymap 3: Swap control and gui on the thumb */
    [SWPH] = LAYOUT_ergodox(
        // left hand
        _______, _______, _______, _______, _______, _______, _______,
        _______, _______, _______, _______, _______, _______, _______,
        _______, _______, _______, _______, _______, _______,
        _______, _______, _______, _______, _______, _______, _______,
        _______, _______, _______, _______, _______,
                                                     _______, _______,
                                                              _______,
                               GUI_T(KC_BSPC), CTL_T(KC_DEL), _______,
        // right hand
        _______, _______, _______, _______, _______, _______, _______,
        _______, _______, _______, _______, _______, _______, _______,
                 _______, _______, _______, _______, _______, _______,
        _______, _______, _______, _______, _______, _______, _______,
                          _______, _______, _______, _______, _______,
        _______, _______,
        _______,
        _______, CTL_T(KC_ENT), GUI_T(KC_SPC)
    ),
};

// Runs just one time when the keyboard initializes.
void matrix_init_user(void) {
    // If our magic word wasn't set properly, we need to zero out the settings.
    if (eeprom_read_word(EECONFIG_BELAK) != EECONFIG_BELAK_MAGIC) {
        eeprom_update_word(EECONFIG_BELAK, EECONFIG_BELAK_MAGIC);
        eeprom_update_byte(EECONFIG_BELAK_SWAP_GUI_CTRL, 0);
    }

    if (eeprom_read_byte(EECONFIG_BELAK_SWAP_GUI_CTRL)) {
        layer_on(SWPH);
        swap_gui_ctrl = 1;
    }
};

// Runs constantly in the background, in a loop.
void matrix_scan_user(void) {
    ergodox_board_led_off();
    ergodox_right_led_1_off();
    ergodox_right_led_2_off();
    ergodox_right_led_3_off();

    switch (td_led_override) {
    case 1:
        ergodox_right_led_1_on();
        break;
    case 2:
        ergodox_right_led_2_on();
        break;
    default:
        // Layer 1 and 2 are both overlay layers, so they could both be on. This
        // means we can't use the lazy check of checking for the first significant
        // bit.
        if (LAYER_ON(SYMB)) {
            ergodox_right_led_1_on();
        }
        if (LAYER_ON(NUMP)) {
            ergodox_right_led_2_on();
        }
    }
};

bool process_record_user(uint16_t keycode, keyrecord_t *record) {
    switch (keycode) {
    case BEL_F0:
        if(record->event.pressed){
            swap_gui_ctrl = !swap_gui_ctrl;
            eeprom_update_byte(EECONFIG_BELAK_SWAP_GUI_CTRL, swap_gui_ctrl);

            if (swap_gui_ctrl) {
                layer_on(SWPH);
            } else {
                layer_off(SWPH);
            }

            return false;
        }
        break;
    case BEL_F1:
        if(record->event.pressed){
            layer_off(SYMB);
            layer_off(NUMP);

            return false;
        }
        break;
    case E_SHRUG: // ¯\_(ツ)_/¯
        if (record->event.pressed) {
            process_unicode((0x00AF|QK_UNICODE), record);   // Hand
            tap(KC_BSLS);                                   // Arm
            register_code(KC_RSFT);
            tap(KC_UNDS);                                   // Arm
            tap(KC_LPRN);                                   // Head
            unregister_code(KC_RSFT);
            process_unicode((0x30C4|QK_UNICODE), record);   // Face
            register_code(KC_RSFT);
            tap(KC_RPRN);                                   // Head
            tap(KC_UNDS);                                   // Arm
            unregister_code(KC_RSFT);
            tap(KC_SLSH);                                   // Arm
            process_unicode((0x00AF|QK_UNICODE), record);   // Hand
        }
        return false;
        break;
    case E_TFLIP: // (╯°□°)╯ ︵ ┻━┻
        if (record->event.pressed) {
            register_code(KC_RSFT);
            tap(KC_9);
            unregister_code(KC_RSFT);
            process_unicode((0x256F|QK_UNICODE), record);   // Arm
            process_unicode((0x00B0|QK_UNICODE), record);   // Eye
            process_unicode((0x25A1|QK_UNICODE), record);   // Mouth
            process_unicode((0x00B0|QK_UNICODE), record);   // Eye
            register_code(KC_RSFT);
            tap(KC_0);
            unregister_code(KC_RSFT);
            process_unicode((0x256F|QK_UNICODE), record);   // Arm
            tap(KC_SPC);
            process_unicode((0x0361|QK_UNICODE), record);   // Flippy
            tap(KC_SPC);
            process_unicode((0x253B|QK_UNICODE), record);   // Table
            process_unicode((0x2501|QK_UNICODE), record);   // Table
            process_unicode((0x253B|QK_UNICODE), record);   // Table
        }
        return false;
        break;
    case E_TSET: // ┬──┬ ノ( ゜-゜ノ)
        if (record->event.pressed) {
            process_unicode((0x252C|QK_UNICODE), record);   // Table
            process_unicode((0x2500|QK_UNICODE), record);   // Table
            process_unicode((0x2500|QK_UNICODE), record);   // Table
            process_unicode((0x252C|QK_UNICODE), record);   // Table
            tap(KC_SPC);
            process_unicode((0x30CE|QK_UNICODE), record);   // Arm
            register_code(KC_RSFT);
            tap(KC_9);
            unregister_code(KC_RSFT);
            tap(KC_SPC);
            process_unicode((0x309C|QK_UNICODE), record);   // Eye
            tap(KC_MINS);
            process_unicode((0x309C|QK_UNICODE), record);   // Eye
            process_unicode((0x30CE|QK_UNICODE), record);   // Arm
            register_code(KC_RSFT);
            tap(KC_0);
            unregister_code(KC_RSFT);
        }
        return false;
        break;
    }

    return true;
}

void belak_td_each(qk_tap_dance_state_t *state, void *user_data) {
    switch (state->count) {
    case 1:
        td_led_override = 1;
        break;
    case 2:
        td_led_override = 2;
        break;
    default:
        reset_tap_dance(state);
    }
}

void belak_td_finished(qk_tap_dance_state_t *state, void *user_data) {
    switch (state->count) {
    case 1:
        layer_on(SYMB);
        break;
    case 2:
        layer_on(NUMP);
        break;
    }
    td_led_override = 0;
}

void belak_td_reset(qk_tap_dance_state_t *state, void *user_data) {
    td_led_override = 0;
}