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/* Copyright 2017 Brian Fong
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#include QMK_KEYBOARD_H

// Each layer gets a name for readability, which is then used in the keymap matrix below.
// The underscores don't mean anything - you can have a layer called STUFF or any other name.
// Layer names don't all need to be of the same length, obviously, and you can also skip them
// entirely and just use numbers.
#define _QW 0
#define DIR 1
#define NUM 2
#define ETC 3

// Readability keycodes
#define _______ KC_TRNS


/////////////// TAP DANCE SECTION START ///////////////
//Tap Dance Declarations (list of my tap dance configurations)
enum {
  TD_SFT_CAPS = 0
  ,TD_Q_ESC
  ,ENT_TAP_DANCE
  ,DEL_TAP_DANCE
};

///// QUAD FUNCTION TAP DANCE GENERAL SETUP SECTION START /////
///// (no need to edit this section) /////
//Enums used to clearly convey the state of the tap dance
enum {
  SINGLE_TAP = 1,
  SINGLE_HOLD = 2,
  DOUBLE_TAP = 3,
  DOUBLE_HOLD = 4,
  DOUBLE_SINGLE_TAP = 5 //send SINGLE_TAP twice - NOT DOUBLE_TAP
  // Add more enums here if you want for triple, quadruple, etc.
};

typedef struct {
  bool is_press_action;
  int state;
} tap;

int cur_dance (qk_tap_dance_state_t *state) {
  if (state->count == 1) {
    //If count = 1, and it has been interrupted - it doesn't matter if it is pressed or not: Send SINGLE_TAP
    if (state->interrupted || !state->pressed) return SINGLE_TAP;
    if (state->interrupted) return SINGLE_TAP;
    else return SINGLE_HOLD;
  }
  //If count = 2, and it has been interrupted - assume that user is trying to type the letter associated
  //with single tap.
  else if (state->count == 2) {
    if (state->interrupted) return DOUBLE_SINGLE_TAP;
    else if (state->pressed) return DOUBLE_HOLD;
    else return DOUBLE_TAP;
  }
  else return 6; //magic number. At some point this method will expand to work for more presses
}
///// QUAD FUNCTION TAP DANCE GENERAL SETUP SECTION END /////
///// QUAD FUNCTION TAP DANCE PERSONALIZATION SECTION START /////
//instantialize an instance of 'tap' for the 'ENT' tap dance.
static tap ENTtap_state = {
  .is_press_action = true,
  .state = 0
};

void ENT_finished (qk_tap_dance_state_t *state, void *user_data) {
  ENTtap_state.state = cur_dance(state);
  switch (ENTtap_state.state) {
    case SINGLE_TAP: register_code(KC_SPC); break;
    case SINGLE_HOLD: register_code(KC_LSFT); break;
    case DOUBLE_TAP: register_code(KC_ENT); break;
    case DOUBLE_HOLD: register_code(KC_NO); break; // setting double hold to do nothing (change this if you want)
    case DOUBLE_SINGLE_TAP: register_code(KC_SPC); unregister_code(KC_SPC); register_code(KC_SPC);
    //Last case is for fast typing. Assuming your key is `f`:
    //For example, when typing the word `buffer`, and you want to make sure that you send `ff` and not `Esc`.
    //In order to type `ff` when typing fast, the next character will have to be hit within the `TAPPING_TERM`, which by default is 200ms.
  }
}

void ENT_reset (qk_tap_dance_state_t *state, void *user_data) {
  switch (ENTtap_state.state) {
    case SINGLE_TAP: unregister_code(KC_SPC); break;
    case SINGLE_HOLD: unregister_code(KC_LSFT); break;
    case DOUBLE_TAP: unregister_code(KC_ENT); break;
    case DOUBLE_HOLD: unregister_code(KC_NO);
    case DOUBLE_SINGLE_TAP: unregister_code(KC_SPC);
  }
  ENTtap_state.state = 0;
}

//instanalize an instance of 'tap' for the 'DEL' tap dance.
static tap DELtap_state = {
  .is_press_action = true,
  .state = 0
};

void DEL_finished (qk_tap_dance_state_t *state, void *user_data) {
  DELtap_state.state = cur_dance(state);
  switch (DELtap_state.state) {
    case SINGLE_TAP: register_code(KC_BSPC); break;
    case SINGLE_HOLD: register_code(KC_LCTL); break;
    case DOUBLE_TAP: register_code(KC_DEL); break;
    case DOUBLE_HOLD: register_code(KC_NO); break;
    case DOUBLE_SINGLE_TAP: register_code(KC_BSPC); unregister_code(KC_BSPC); register_code(KC_BSPC);
  }
}

void DEL_reset (qk_tap_dance_state_t *state, void *user_data) {
  switch (DELtap_state.state) {
    case SINGLE_TAP: unregister_code(KC_BSPC); break;
    case SINGLE_HOLD: unregister_code(KC_LCTL); break;
    case DOUBLE_TAP: unregister_code(KC_DEL); break;
    case DOUBLE_HOLD: unregister_code(KC_NO);
    case DOUBLE_SINGLE_TAP: unregister_code(KC_BSPC);
  }
  DELtap_state.state = 0;
}
///// QUAD FUNCTION TAP DANCE PERSONALIZATION SECTION END /////

//Tap Dance Definitions
//THIS SECTION HAS TO BE AT THE END OF THE TAP DANCE SECTION
qk_tap_dance_action_t tap_dance_actions[] = {
  [TD_SFT_CAPS] = ACTION_TAP_DANCE_DOUBLE(KC_LSFT, KC_CAPS)
// Other declarations would go here, separated by commas, if you have them
 ,[TD_Q_ESC]  = ACTION_TAP_DANCE_DOUBLE(KC_Q, KC_ESC)
 ,[ENT_TAP_DANCE] = ACTION_TAP_DANCE_FN_ADVANCED(NULL, ENT_finished, ENT_reset)
 ,[DEL_TAP_DANCE] = ACTION_TAP_DANCE_FN_ADVANCED(NULL, DEL_finished, DEL_reset)
};

//In Layer declaration, add tap dance item in place of a key code
//TD(TD_SFT_CAPS)

///////////// TAP DANCE SECTION END ///////////////

const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {

  /* Qwerty
   * .-----------------------------------------------------------------------------------------.
   * | Q//ESC | W      | E      | R      | T      | Y      | U      | I      | O      | P      |
   * |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
   * | A      | S      | D      | F      | G      | H      | J      | K      | L      | SPACE  |
   * |        |        |        |        |        |        |        |        |        |SFThold |
   * |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
   * | Z      | X      | C      | V/NUM  | B/ETC  | N      | M/DIR  | ,/GUI  | ./ALT  | BKSC   |
   * | SFThold|        |        |        |        |        |        |        |        |CTRLhold|
   * '-----------------------------------------------------------------------------------------'
   */
  [_QW] = LAYOUT_ortho_3x10( /* Qwerty*/
    TD(TD_Q_ESC), KC_W,    KC_E,    KC_R,          KC_T,          KC_Y, KC_U,          KC_I,           KC_O,          KC_P,
    KC_A,         KC_S,    KC_D,    KC_F,          KC_G,          KC_H, KC_J,          KC_K,           KC_L,          SFT_T(KC_SPC),
    SFT_T(KC_Z),  KC_X,    KC_C,    LT(NUM, KC_V), LT(ETC, KC_B), KC_N, LT(DIR, KC_M), GUI_T(KC_COMM), ALT_T(KC_DOT), CTL_T(KC_BSPC)
  ),

  /*
   *  Directional Modifiers
   * .-----------------------------------------------------------------------------------------.
   * | TAB    |   up   |        | INS    |  CTRL  | SHIFT  | PgUp   | HOME   |  -     |  =     |
   * |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
   * | left   |  down  | right  | PrScr  | SHIFT  |  CTRL  | PgDn   | END    |  [     |  ]     |
   * |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
   * | P-Brk  |        |        |        |        |        |        | RGUI   | ALT    |  /     |
   * '-----------------------------------------------------------------------------------------'
   */
  [DIR] = LAYOUT_ortho_3x10( /* Directional Modifiers */
    KC_TAB,  KC_UP,   _______, KC_INS,  KC_LCTL, KC_RSFT, KC_PGUP, KC_HOME, KC_MINS, KC_EQL,
    KC_LEFT, KC_DOWN, KC_RGHT, KC_PSCR, KC_LSFT, KC_RCTL, KC_PGDN, KC_END,  KC_LBRC, KC_RBRC,
    KC_PAUS, _______, _______, _______, _______, _______, _______, KC_RGUI, KC_LALT, KC_SLSH
  ),

  /*
   *  Numbers
   * .-----------------------------------------------------------------------------------------.
   * | F1     | F2     | F3     | F4     | F5     | F6     | F7     | F8     | F9     | F10    |
   * |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
   * | 1      | 2      | 3      | 4      | 5      | 6      | 7      | 8      | 9      | 0      |
   * |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
   * | F11    | F12    |        |        |        | ENTER  | SHIFT  | GUI    | ./ALT  | BKSC   |
   * |        |        |        |        |        |        |        |        |        |CTRLhold|
   * '-----------------------------------------------------------------------------------------'
   */
  [NUM] = LAYOUT_ortho_3x10 ( /* Numbers */
    KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10,
    KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,
    KC_F11,  KC_F12,  _______, _______, _______, KC_ENT,  KC_RSFT, KC_RGUI, ALT_T(KC_DOT), CTL_T(KC_BSPC)
  ),

  /*
   *  ETC
   * .-----------------------------------------------------------------------------------------.
   * |  `     | mUP    |        |        | RESET  | SHIFT  | mUp    | mDown  |        |  \     |
   * |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
   * | mLeft  | mDown  | mRight |        | SHIFT  | mBtn3  | mBtn1  | mBtn2  |  ;     |  '     |
   * |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
   * | Sft//Cp|        |        |        |        | C-A-D  | mLeft  | mRight | ALT    |  DEL   |
   * '-----------------------------------------------------------------------------------------'
   */
  [ETC] = LAYOUT_ortho_3x10( /* ETC */
    KC_GRV,  KC_MS_U, _______, _______, RESET,   KC_RSFT, KC_WH_U, KC_WH_D, _______, KC_BSLS,
    KC_MS_L, KC_MS_D, KC_MS_R, _______, KC_LSFT, KC_BTN3, KC_BTN1, KC_BTN2, KC_SCLN, KC_QUOT,
    TD(TD_SFT_CAPS), _______, _______, _______, _______, LALT(LCTL(KC_DEL)), KC_WH_L, KC_WH_R, KC_LALT, KC_DEL
  ),

};