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/* Copyright 2020 pastapojken <pastapojken@gmail.com>
 *
 * 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
#include "keymap.h"

#define ____ _______

// Defines names for use in layer keycodes and the keymap
enum layer_names {
    BASE,
    NUM,
    FN
};

// Defines the keycodes used by our macros in process_record_user
enum custom_keycodes {
    CK_LSFT = SAFE_RANGE,   // Shift
    CK_RALT,                // AltGr
    CK_BSPC_DEL,            // Backspace or Del (if pressed with CK_LSFT or CK_RALT)
    CK_UP_PGUP,             // Up or PgUp (if pressed with CK_LSFT or CK_RALT)
    CK_DOWN_PGDOWN,         // Down or PgDown (if pressed with CK_LSFT or CK_RALT)
    CK_LEFT_HOME,           // Left or Home (if pressed with CK_LSFT or CK_RALT)
    CK_RIGHT_END,           // Right or End (if pressed with CK_LSFT or CK_RALT)
    KK_RESET
};

const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
    [BASE] = LAYOUT(
/*   __________________________________________________________________________________________________________________________________________________________________________
    | \            \            \            \            \            \            \            \            \            \            \            \            \            \        */                                                                                                                                                                 
//  | |----TAB-----|---Q--------|-----W------|-----E------|-----R------|----T-------|-----Y------|-----U------|----I-------|------O-----|----P-------|----Å-------|--( ¨^~ )---|  
       KC_TAB,      KC_Q,        KC_W,        KC_E,        KC_R,        KC_T,        KC_Y,        KC_U,        KC_I,        KC_O,        KC_P,        KC_LBRC,     KC_RBRC,
//  | |----ESC-----|---A--------|---S--------|----D-------|-----F------|-----G------|-----H------|-----J------|-----K------|-----L------|-----Ö------|-----Ä------|--( '* )----|  
       KC_ESC,      KC_A,        KC_S,        KC_D,        KC_F,        KC_G,        KC_H,        KC_J,        KC_K,        KC_L,        KC_SCLN,     KC_QUOT,     KC_NUHS,
//  | |---SHIFT----|---Z--------|---X--------|----C-------|-----V------|-----B------|-----N------|------M-----|---( ,; )---|---( .: )---|---( -_ )---|----UP------|-BACKSPACE--|  
       CK_LSFT,     KC_Z,        KC_X,        KC_C,        KC_V,        KC_B,        KC_N,        KC_M,        KC_COMM,     KC_DOT,      KC_SLSH,     CK_UP_PGUP,  CK_BSPC_DEL,
//  | |---CTRL-----|---ALT------|---META-----|----FN_1----|----------SPACE----------|----FN_2----|----AltGr---|--( <>| )---|---ENETER---|-LEFT-------|---DOWN-----|--RIGHT-----|  
       KC_LCTL,     KC_LALT,     KC_LGUI,     TT(NUM),     KC_SPC,      KC_NO,       TT(FN),      CK_RALT,     KC_NUBS,     KC_ENT,     CK_LEFT_HOME,CK_DOWN_PGDOWN,CK_RIGHT_END
//   \|____________|____________|____________|____________|____________|____________|____________|____________|____________|____________|____________|____________|____________|         
    ),
    [NUM] = LAYOUT(
/*   __________________________________________________________________________________________________________________________________________________________________________
    | \            \            \            \            \            \            \            \            \            \            \            \            \            \        */                                                                                                                                                                         
//  | |---TAB------|---( 1! )---|--( 2"@ )---|--( 3#£ )---|---( 4¤$ )--|--( 5%€ )---|---( 6& )---|--( 7/{ )---|--( 8([ )---|--( 9)] )---|--( 0=} )---|---( +?\ )--|---( ´` )---|
       ____,        KC_1,        KC_2,        KC_3,        KC_4,        KC_5,        KC_6,        KC_7,        KC_8,        KC_9,        KC_0,        KC_MINS,     KC_EQL,
//  | |----ESC-----|-----F1-----|-----F2-----|----F3------|----F4------|----F5------|-----F6-----|-----F7------|----F8-----|-----F9-----|-----F10----|----F11-----|----F12-----|  
       ____,        KC_F1,       KC_F2,       KC_F3,       KC_F4,       KC_F5,       KC_F6,       KC_F7,       KC_F8,       KC_F9,       KC_F10,      KC_F11,      KC_F12,
//  | |---SHIFT----|------------|------------|------------|------------|------------|------------|------------|------------|------------|------------|------------|------------|  
       ____,        KC_NO,       KC_NO,       KC_NO,       KC_NO,       KC_NO,       KC_NO,       KC_NO,       KC_NO,       KC_NO,       KC_NO,       KC_NO,       KC_NO,
//  | |---CTRL-----|---ALT------|---META-----|---FN_1-----|------------|------------|----FN_2----|--AltGr-----|---( §½ )---|------------|------------|------------|------------|  
       ____,        ____,        ____,        TT(FN),       KC_NO,      KC_NO,       TO(BASE),    ____,        KC_GRV,      KC_NO,       KC_NO,       KC_NO,       KC_NO
//   \|____________|____________|____________|____________|____________|____________|____________|____________|____________|____________|____________|____________|____________|         
    ),
    [FN] = LAYOUT(
/*   __________________________________________________________________________________________________________________________________________________________________________
    | \            \            \            \            \            \            \            \            \            \            \            \            \            \        */                                                                                                                                                           
//  | |-RGB TOGGLE-|-CHANGE RGB-|-RGB HUE UP-|-RGB SAT UP-|------------|------------|------------|------------|------------|------------|------------|------------|-RESET KBD--|  
       RGB_TOG,     RGB_MOD,     RGB_HUI,     RGB_SAI,     KC_NO,       KC_NO,       KC_NO,       KC_NO,       KC_NO,       KC_NO,       KC_NO,       KC_NO,       KK_RESET,
//  | |------------|------------|------------|------------|------------|------------|------------|------------|------------|------------|------------|------------|------------|  
       MU_TOG,      KC_NO,       KC_NO,       KC_NO,       KC_NO,       KC_NO,       KC_NO,       KC_NO,       KC_NO,       KC_NO,       KC_NO,       KC_NO,       KC_NO,
//  | |------------|------------|------------|------------|------------|------------|------------|------------|------------|------------|------------|-RGB LIGHT +|------------|  
       KC_NO,       KC_NO,       KC_NO,       KC_NO,       KC_NO,       KC_NO,       KC_NO,       KC_NO,       KC_NO,       KC_NO,       KC_NO,       RGB_VAI,     KC_NO,
//  | |------------|------------|------------|---FN_1-----|------------|------------|----FN_2----|------------|------------|------------|------------|-RGB LIGHT -|------------|  
       KC_NO,       KC_NO,       KC_NO,       TT(NUM),     KC_NO,       KC_NO,       TO(BASE),    KC_NO,       KC_NO,       KC_NO,       KC_NO,       RGB_VAD,     KC_NO
//   \|____________|____________|____________|____________|____________|____________|____________|____________|____________|____________|____________|____________|____________|         
    )
};

// Interrupt bools
bool lshift = false, ralt = false;

// Number of items that are saved in prev_kcs
uint8_t prev_indx = 0;
// Used to save the last 6 actual keycodes
uint16_t prev_kcs[6] = {0, 0, 0, 0, 0, 0};

/*
Used to add a keycode to a prev_kcs to remember it.
When full the last code gets discarded and replaced by
the new one.
*/
void add_to_prev(uint16_t kc){
  for (int i=0; i<prev_indx; i++){
    if (kc == prev_kcs[i])
      return;
  }
  if (prev_indx == 6){
    for (int i=5; i>0; i--){
      prev_kcs[i] = prev_kcs[i-1];
    }
    prev_kcs[0] = kc;
  } else {
    prev_kcs[prev_indx] = kc;
    prev_indx++;
  }
}

/*
Unregisters all codes saved in prev_kcs and resets prev_indx.
gets called on multiple occasions mainly when shift is released
and when frankenkeycodes are pressed. Prevents output of
wrong characters when really specific key combinations
that would never occur during normal usage are pressed.
*/
void unreg_prev(void){
  if (prev_indx == 0)
    return;
  for (int i=0; i<prev_indx; i++){
    unregister_code(prev_kcs[i]);
  }
  prev_indx = 0;
}

bool process_record_user(uint16_t keycode, keyrecord_t *record) {
    static uint32_t key_timer;
    switch (keycode) {
        case CK_LSFT:
          if(record->event.pressed) {
            unregister_code(KC_LSFT);
            register_code(KC_LSFT);
            lshift = true;
          } else {
            unreg_prev();
            unregister_code(KC_LSFT);
            lshift = false;
          }
          return false;
        case CK_RALT:
          if(record->event.pressed) {
            unregister_code(KC_RALT);
            register_code(KC_RALT);
            ralt = true;
          } else {
            unreg_prev();
            unregister_code(KC_RALT);
            ralt = false;
          }
          return false;
        case CK_BSPC_DEL:
            RALT_NO(KC_BSPC,KC_DEL);
            break;
        case CK_UP_PGUP:
            RALT_NO(KC_UP,KC_PGUP);
            break;
        case CK_DOWN_PGDOWN:
            RALT_NO(KC_DOWN,KC_PGDOWN);
            break;
        case CK_LEFT_HOME:
            RALT_NO(KC_LEFT,KC_HOME);
            break;
        case CK_RIGHT_END:
            RALT_NO(KC_RIGHT,KC_END);
            break;
        case KK_RESET: // Basically, turn off RGB before resetting
                if (record->event.pressed) {
                    key_timer = timer_read32();
                    #ifdef RGB_MATRIX_ENABLE
                    rgb_matrix_disable_noeeprom();
                    #endif
                } else {
                    if (timer_elapsed32(key_timer) >= 20) {
                        reset_keyboard();
                    }
                }
                break;
        default:
          if(record->event.pressed) {
            timer_timeout_keymap();
            if (lshift)
              register_code(KC_LSFT);
            else
              unregister_code(KC_LSFT);
            
            if (ralt)
              register_code(KC_ALGR);
            else
              unregister_code(KC_ALGR);
          }
        break;
    }
    return true;
}

__attribute__((weak))
void timer_timeout_keymap(void){
}