/* Copyright 2021 @daliusd
 *
 * 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 "flow.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.
enum layers {
    _QWERTY,
    _SYM,
    _NAV,
    _MISC,
    _TMUX,
    _MOUSE,
    _FUNC,
    _LT_MAC,
    _LT_LINUX,
};

enum custom_keycodes {
  TM_NEXT = SAFE_RANGE,
  TM_PREV,
  TM_LEFT,
  TM_RIGHT,
  TM_NEW,
  TM_SLCT,
  TM_SRCH,
  TM_URL,
  OS_MISC,
  OS_TMUX,
  OS_FUNC,
  LT_OSLNX,
};

// Shortcut to make keymap more readable

#define L_NAV       MO(_NAV)
#define L_SYM       MO(_SYM)
#define L_MOUSE     MO(_MOUSE)

#define K_PRINT     (QK_LCTL | QK_LSFT | QK_LGUI | KC_4)
#define K_VIDEO     (QK_LSFT | QK_LGUI | KC_5)

// flow_config should correspond to following format:
// * layer keycode
// * modifier keycode
const uint16_t flow_config[FLOW_COUNT][2] = {
    {L_NAV, KC_LALT},
    {L_NAV, KC_LGUI},
    {L_NAV, KC_LCTL},
    {L_SYM, KC_RCTL},
    {L_SYM, KC_RGUI},
    {L_SYM, KC_RALT},
};

const uint16_t flow_layers_config[FLOW_LAYERS_COUNT][2] = {
    {OS_MISC, _MISC},
    {OS_TMUX, _TMUX},
    {OS_FUNC, _FUNC},
};

// Unicode characters
enum unicode_names {
    SNEK,
    EURO,
    LT_S_A,
    LT_L_A,
    LT_S_C,
    LT_L_C,
    LT_S_E1,
    LT_L_E1,
    LT_S_E2,
    LT_L_E2,
    LT_S_I,
    LT_L_I,
    LT_S_S,
    LT_L_S,
    LT_S_U1,
    LT_L_U1,
    LT_S_U2,
    LT_L_U2,
    LT_S_Z,
    LT_L_Z,
    LT_OB,
    LT_CB,
};

const uint32_t unicode_map[] PROGMEM = {
    [SNEK]  = 0x1F40D, // 🐍
    [EURO]  = 0x20ac, // €
    [LT_S_A] = 0x105, // ą
    [LT_L_A] = 0x104, // Ą
    [LT_S_C] = 0x10d, // č
    [LT_L_C] = 0x10c, // Č
    [LT_S_E1] = 0x119, // ę
    [LT_L_E1] = 0x118, // Ę
    [LT_S_E2] = 0x117, // ė
    [LT_L_E2] = 0x116, // Ė
    [LT_S_I] = 0x12f, // į
    [LT_L_I] = 0x12e, // Į
    [LT_S_S] = 0x161, // š
    [LT_L_S] = 0x160, // Š
    [LT_S_U1] = 0x173, // ų
    [LT_L_U1] = 0x172, // Ų
    [LT_S_U2] = 0x16b, // ū
    [LT_L_U2] = 0x16a, // Ū
    [LT_S_Z] = 0x17e, // ž
    [LT_L_Z] = 0x17d, // Ž
    [LT_OB] = 0x201e, // „
    [LT_CB] = 0x201c, // “
};

#define K_SNEK      UM(SNEK)
#define K_EURO      UM(EURO)
#define K_LT_A      UP(LT_S_A, LT_L_A)
#define K_LT_AU     UM(LT_L_A)
#define K_LT_C      UP(LT_S_C, LT_L_C)
#define K_LT_CU     UM(LT_L_C)
#define K_LT_E1     UP(LT_S_E1, LT_L_E1)
#define K_LT_E1U    UM(LT_L_E1)
#define K_LT_E2     UP(LT_S_E2, LT_L_E2)
#define K_LT_E2U    UM(LT_L_E2)
#define K_LT_I      UP(LT_S_I, LT_L_I)
#define K_LT_IU     UM(LT_L_I)
#define K_LT_S      UP(LT_S_S, LT_L_S)
#define K_LT_SU     UM(LT_L_S)
#define K_LT_U1     UP(LT_S_U1, LT_L_U1)
#define K_LT_U1U    UM(LT_L_U1)
#define K_LT_U2     UP(LT_S_U2, LT_L_U2)
#define K_LT_U2U    UM(LT_L_U2)
#define K_LT_Z      UP(LT_S_Z, LT_L_Z)
#define K_LT_ZU     UM(LT_L_Z)
#define K_LT_OB     UM(LT_OB)
#define K_LT_CB     UM(LT_CB)

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

  [_QWERTY] = LAYOUT(
  //┌────────┬────────┬────────┬────────┬────────┐                         ┌────────┬────────┬────────┬────────┬────────┐
     KC_Q    ,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    ,KC_SCLN ,
  //├────────┼────────┼────────┼────────┼────────┤                         ├────────┼────────┼────────┼────────┼────────┤
     KC_Z    ,KC_X    ,KC_C    ,KC_V    ,KC_B    ,                          KC_N    ,KC_M    ,KC_COMM ,KC_DOT  ,KC_SLSH,
  //└────────┴────────┴────────┴────┬───┴────┬───┼────────┐       ┌────────┼───┬────┴───┬────┴────────┴────────┴────────┘
                                     L_NAV   ,    KC_SPC  ,        KC_LSFT ,    L_SYM
  //                                └────────┘   └────────┘       └────────┘   └────────┘
  ),

  [_SYM] = LAYOUT(
  //┌────────┬────────┬────────┬────────┬────────┐                         ┌────────┬────────┬────────┬────────┬────────┐
     KC_EXLM ,KC_AT   ,KC_HASH ,KC_DLR  ,KC_PERC ,                          KC_CIRC ,KC_AMPR ,KC_ASTR ,KC_LPRN ,KC_RPRN ,
  //├────────┼────────┼────────┼────────┼────────┤                         ├────────┼────────┼────────┼────────┼────────┤
     XXXXXXX ,KC_GRV  ,KC_LBRC ,KC_RBRC ,KC_PLUS ,                          KC_MINS ,KC_PIPE ,KC_RCTL ,KC_RGUI ,KC_RALT ,
  //├────────┼────────┼────────┼────────┼────────┤                         ├────────┼────────┼────────┼────────┼────────┤
     KC_DEL  ,KC_BSPC ,KC_LCBR ,KC_RCBR ,KC_EQL  ,                          KC_UNDS ,KC_QUOT ,KC_DQT  ,OS_MISC ,KC_BSLS ,
  //└────────┴────────┴────────┴────┬───┴────┬───┼────────┐       ┌────────┼───┬────┴───┬────┴────────┴────────┴────────┘
                                     _______ ,    _______ ,        _______ ,    XXXXXXX
  //                                └────────┘   └────────┘       └────────┘   └────────┘
  ),

  [_NAV] = LAYOUT(
  //┌────────┬────────┬────────┬────────┬────────┐                         ┌────────┬────────┬────────┬────────┬────────┐
     KC_1    ,KC_2    ,KC_3    ,KC_4    ,KC_5    ,                          KC_6    ,KC_7    ,KC_8    ,KC_9    ,KC_0    ,
  //├────────┼────────┼────────┼────────┼────────┤                         ├────────┼────────┼────────┼────────┼────────┤
     KC_LALT ,KC_LGUI ,KC_LCTL ,KC_TAB  ,KC_ENT  ,                          KC_LEFT ,KC_DOWN ,KC_UP   ,KC_RIGHT,KC_PGUP ,
  //├────────┼────────┼────────┼────────┼────────┤                         ├────────┼────────┼────────┼────────┼────────┤
     KC_LSFT ,KC_BSPC ,KC_ESC  ,KC_TILDE,OS_TMUX ,                          OS_FUNC ,L_MOUSE ,KC_COMM ,KC_DOT  ,KC_PGDN ,
  //└────────┴────────┴────────┴────┬───┴────┬───┼────────┐       ┌────────┼───┬────┴───┬────┴────────┴────────┴────────┘
                                     XXXXXXX ,    _______ ,        _______ ,    _______
  //                                └────────┘   └────────┘       └────────┘   └────────┘
  ),

  [_MISC] = LAYOUT(
  //┌────────┬────────┬────────┬────────┬────────┐                         ┌────────┬────────┬────────┬────────┬────────┐
     QK_BOOT ,XXXXXXX ,XXXXXXX ,XXXXXXX ,XXXXXXX ,                          KC_BRID ,KC_BRIU ,KC_PSCR ,XXXXXXX ,K_PRINT ,
  //├────────┼────────┼────────┼────────┼────────┤                         ├────────┼────────┼────────┼────────┼────────┤
     XXXXXXX ,XXXXXXX ,DB_TOGG ,LT_OSLNX,XXXXXXX ,                          KC_MPRV ,KC_MPLY ,KC_MNXT ,XXXXXXX ,K_VIDEO ,
  //├────────┼────────┼────────┼────────┼────────┤                         ├────────┼────────┼────────┼────────┼────────┤
     XXXXXXX ,XXXXXXX ,XXXXXXX ,XXXXXXX ,XXXXXXX ,                          KC_VOLD ,KC_VOLU ,XXXXXXX ,XXXXXXX ,XXXXXXX ,
  //└────────┴────────┴────────┴────┬───┴────┬───┼────────┐       ┌────────┼───┬────┴───┬────┴────────┴────────┴────────┘
                                     XXXXXXX ,    XXXXXXX ,        XXXXXXX ,    XXXXXXX
  //                                └────────┘   └────────┘       └────────┘   └────────┘
  ),

  [_TMUX] = LAYOUT(
  //┌────────┬────────┬────────┬────────┬────────┐                         ┌────────┬────────┬────────┬────────┬────────┐
     XXXXXXX ,XXXXXXX ,XXXXXXX ,XXXXXXX ,XXXXXXX ,                          XXXXXXX ,TM_URL  ,XXXXXXX ,XXXXXXX ,XXXXXXX ,
  //├────────┼────────┼────────┼────────┼────────┤                         ├────────┼────────┼────────┼────────┼────────┤
     XXXXXXX ,XXXXXXX ,XXXXXXX ,XXXXXXX ,XXXXXXX ,                          TM_LEFT ,TM_NEXT ,TM_PREV ,TM_RIGHT,XXXXXXX ,
  //├────────┼────────┼────────┼────────┼────────┤                         ├────────┼────────┼────────┼────────┼────────┤
     XXXXXXX ,XXXXXXX ,XXXXXXX ,XXXXXXX ,XXXXXXX ,                          TM_NEW  ,TM_SLCT ,XXXXXXX ,XXXXXXX ,TM_SRCH ,
  //└────────┴────────┴────────┴────┬───┴────┬───┼────────┐       ┌────────┼───┬────┴───┬────┴────────┴────────┴────────┘
                                     XXXXXXX ,    XXXXXXX ,        XXXXXXX ,    XXXXXXX
  //                                └────────┘   └────────┘       └────────┘   └────────┘
  ),

  [_MOUSE] = LAYOUT(
  //┌────────┬────────┬────────┬────────┬────────┐                         ┌────────┬────────┬────────┬────────┬────────┐
     XXXXXXX ,XXXXXXX ,KC_MS_U ,KC_BTN3 ,KC_WH_U ,                          XXXXXXX ,XXXXXXX ,XXXXXXX ,XXXXXXX ,XXXXXXX ,
  //├────────┼────────┼────────┼────────┼────────┤                         ├────────┼────────┼────────┼────────┼────────┤
     XXXXXXX ,KC_MS_L ,KC_MS_D ,KC_MS_R ,KC_WH_D ,                          XXXXXXX ,XXXXXXX ,KC_RCTL ,KC_RGUI ,KC_RALT ,
  //├────────┼────────┼────────┼────────┼────────┤                         ├────────┼────────┼────────┼────────┼────────┤
     XXXXXXX ,XXXXXXX ,XXXXXXX ,XXXXXXX ,XXXXXXX ,                          XXXXXXX ,XXXXXXX ,XXXXXXX ,XXXXXXX ,XXXXXXX ,
  //└────────┴────────┴────────┴────┬───┴────┬───┼────────┐       ┌────────┼───┬────┴───┬────┴────────┴────────┴────────┘
                                     KC_BTN1 ,    KC_BTN2 ,        _______ ,    XXXXXXX
  //                                └────────┘   └────────┘       └────────┘   └────────┘
  ),

  [_FUNC] = LAYOUT(
  //┌────────┬────────┬────────┬────────┬────────┐                         ┌────────┬────────┬────────┬────────┬────────┐
     KC_F1   ,KC_F2   ,KC_F3   ,KC_F4   ,KC_F5   ,                          XXXXXXX ,XXXXXXX ,XXXXXXX ,XXXXXXX ,XXXXXXX ,
  //├────────┼────────┼────────┼────────┼────────┤                         ├────────┼────────┼────────┼────────┼────────┤
     KC_F6   ,KC_F7   ,KC_F8   ,KC_F9   ,KC_F10  ,                          XXXXXXX ,XXXXXXX ,KC_RCTL ,KC_RGUI ,KC_RALT ,
  //├────────┼────────┼────────┼────────┼────────┤                         ├────────┼────────┼────────┼────────┼────────┤
     KC_F11  ,KC_F12  ,XXXXXXX ,XXXXXXX ,XXXXXXX ,                          XXXXXXX ,XXXXXXX ,XXXXXXX ,XXXXXXX ,XXXXXXX ,
  //└────────┴────────┴────────┴────┬───┴────┬───┼────────┐       ┌────────┼───┬────┴───┬────┴────────┴────────┴────────┘
                                     XXXXXXX ,    XXXXXXX ,        XXXXXXX ,    XXXXXXX
  //                                └────────┘   └────────┘       └────────┘   └────────┘
  ),

  [_LT_MAC] = LAYOUT(
  //┌────────┬────────┬────────┬────────┬────────┐                         ┌────────┬────────┬────────┬────────┬────────┐
     KC_EXLM ,KC_AT   ,KC_HASH ,KC_DLR  ,KC_PERC ,                          KC_CIRC ,KC_AMPR ,KC_ASTR ,KC_PLUS ,XXXXXXX ,
  //├────────┼────────┼────────┼────────┼────────┤                         ├────────┼────────┼────────┼────────┼────────┤
     KC_1    ,KC_2    ,KC_3    ,KC_4    ,KC_5    ,                          KC_6    ,KC_7    ,KC_8    ,KC_EQL  ,XXXXXXX ,
  //├────────┼────────┼────────┼────────┼────────┤                         ├────────┼────────┼────────┼────────┼────────┤
     XXXXXXX ,KC_BSPC ,XXXXXXX ,XXXXXXX ,XXXXXXX ,                          XXXXXXX ,XXXXXXX ,XXXXXXX ,XXXXXXX ,XXXXXXX ,
  //└────────┴────────┴────────┴────┬───┴────┬───┼────────┐       ┌────────┼───┬────┴───┬────┴────────┴────────┴────────┘
                                     XXXXXXX ,    XXXXXXX ,        _______ ,    XXXXXXX
  //                                └────────┘   └────────┘       └────────┘   └────────┘
  ),

  [_LT_LINUX] = LAYOUT(
  //┌────────┬────────┬────────┬────────┬────────┐                         ┌────────┬────────┬────────┬────────┬────────┐
     K_LT_AU ,K_LT_CU ,K_LT_E1U,K_LT_E2U,K_LT_IU ,                          K_LT_SU ,K_LT_U1U,K_LT_U2U,K_LT_ZU ,XXXXXXX ,
  //├────────┼────────┼────────┼────────┼────────┤                         ├────────┼────────┼────────┼────────┼────────┤
     K_LT_A  ,K_LT_C  ,K_LT_E1 ,K_LT_E2 ,K_LT_I  ,                          K_LT_S  ,K_LT_U1 ,K_LT_U2 ,K_LT_Z  ,XXXXXXX ,
  //├────────┼────────┼────────┼────────┼────────┤                         ├────────┼────────┼────────┼────────┼────────┤
     XXXXXXX ,KC_BSPC ,XXXXXXX ,K_SNEK  ,K_LT_OB ,                          K_LT_CB ,K_EURO  ,XXXXXXX ,XXXXXXX ,XXXXXXX ,
  //└────────┴────────┴────────┴────┬───┴────┬───┼────────┐       ┌────────┼───┬────┴───┬────┴────────┴────────┴────────┘
                                     XXXXXXX ,    XXXXXXX ,        _______ ,    XXXXXXX
  //                                └────────┘   └────────┘       └────────┘   └────────┘
  ),
};

#define TMUX_PREFIX SS_DOWN(X_LCTL) "b" SS_UP(X_LCTL)

bool lt_os_is_linux = false;

bool process_record_user(uint16_t keycode, keyrecord_t *record) {
    if (!update_flow(keycode, record->event.pressed, record->event.key)) return false;

    switch (keycode) {
        case TM_LEFT:
            if (!record->event.pressed) return true;
            SEND_STRING(TMUX_PREFIX "<");
            return false;
        case TM_RIGHT:
            if (!record->event.pressed) return true;
            SEND_STRING(TMUX_PREFIX ">");
            return false;
        case TM_NEXT:
            if (!record->event.pressed) return true;
            SEND_STRING(TMUX_PREFIX "n");
            return false;
        case TM_PREV:
            if (!record->event.pressed) return true;
            SEND_STRING(TMUX_PREFIX "p");
            return false;
        case TM_NEW:
            if (!record->event.pressed) return true;
            SEND_STRING(TMUX_PREFIX "c");
            return false;
        case TM_SLCT:
            if (!record->event.pressed) return true;
            SEND_STRING(TMUX_PREFIX "[");
            return false;
        case TM_SRCH:
            if (!record->event.pressed) return true;
            SEND_STRING(TMUX_PREFIX "\t");
            return false;
        case TM_URL:
            if (!record->event.pressed) return true;
            SEND_STRING(TMUX_PREFIX SS_LCTL("u"));
            return false;
        case LT_OSLNX:
            if (!record->event.pressed) return true;
            lt_os_is_linux = !lt_os_is_linux;
            return false;
    }
    return true;
}

void matrix_scan_user(void) {
    flow_matrix_scan();
}

bool lang_layer_on = false;

layer_state_t layer_state_set_user(layer_state_t state) {
    state = update_tri_layer_state(state, _SYM, _NAV, lt_os_is_linux ? _LT_LINUX : _LT_MAC);

    uint8_t hl = get_highest_layer(state);
    if (hl == _LT_MAC) {
        if (!lang_layer_on) {
            tap_code16(LCTL(KC_SPC));
            lang_layer_on = true;
        }
    } else {
        if (lang_layer_on) {
            tap_code16(LCTL(KC_SPC));
            lang_layer_on = false;
        }
    }

    return state;
}