/**
 * Copyright 2021 Charly Delay <charly@codesink.dev> (@0xcharly)
 *
 * 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

#ifdef CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_ENABLE
#    include "timer.h"
#endif // CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_ENABLE

enum charybdis_keymap_layers {
    LAYER_BASE = 0,
    LAYER_TRANSPARENT,
    LAYER_GAMING,
    LAYER_POINTER,
    LAYER_SYMBOL,
    LAYER_SETTINGS,
};

/** \brief Automatically enable sniping-mode on the pointer layer. */
#define CHARYBDIS_AUTO_SNIPING_ON_LAYER LAYER_POINTER

#ifdef CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_ENABLE
static uint16_t auto_pointer_layer_timer = 0;

#    ifndef CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_TIMEOUT_MS
#        define CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_TIMEOUT_MS 1000
#    endif // CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_TIMEOUT_MS

#    ifndef CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_THRESHOLD
#        define CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_THRESHOLD 8
#    endif // CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_THRESHOLD
#endif     // CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_ENABLE

#define LOWER MO(LAYER_POINTER)
#define RAISE MO(LAYER_SYMBOL)
#define MO_SET MO(LAYER_SETTINGS)
#define PT_Z LT(LAYER_SETTINGS, KC_Z)
#define PT_SLSH LT(LAYER_SETTINGS, KC_SLSH)

#ifndef POINTING_DEVICE_ENABLE
#    define DRGSCRL KC_NO
#    define DRG_TOG KC_NO
#    define DPI_MOD KC_NO
#    define DPI_RMOD KC_NO
#    define S_D_MOD KC_NO
#    define S_D_RMOD KC_NO
#    define SNIPING KC_NO
#endif // !POINTING_DEVICE_ENABLE

#define HR_A KC_A
#define HR_S MT(MOD_LALT, KC_S)
#define HR_D MT(MOD_LSFT, KC_D)
#define HR_F MT(MOD_LCTL, KC_F)

#define HR_J MT(MOD_RCTL, KC_J)
#define HR_K MT(MOD_RSFT, KC_K)
#define HR_L MT(MOD_RALT, KC_L)
#define HR_SCLN KC_SCLN

#define KC_EUNDO LCTL(LSFT(KC_MINUS))
#define KC_AENTER LCTL(LALT(KC_ENT))
#define WAYFULL LGUI(LSFT(KC_F))
#define WAYHALF LGUI(LSFT(KC_D))
#define KC_CAD LCTL(LALT(KC_DEL))

enum {
    TD_UNDO,
};

// Combo for caps word
const uint16_t PROGMEM capsword_combo[] = {HR_D, HR_K, COMBO_END};

combo_t key_combos[] = {
    COMBO(capsword_combo, QK_CAPS_WORD_TOGGLE),
};

tap_dance_action_t tap_dance_actions[] = {
    [TD_UNDO] = ACTION_TAP_DANCE_DOUBLE(KC_U, KC_EUNDO),
};

#define TD_U TD(TD_UNDO)

#define LT_TAB LT(LAYER_POINTER, KC_TAB)
#define LT_BSPC LT(LAYER_SYMBOL, KC_BSPC)
#define MT_ENT MT(MOD_RGUI, KC_ENT)
#define LT_SPC LT(LAYER_SYMBOL, KC_SPC)

// clang-format off
const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
  [LAYER_BASE] = LAYOUT(
  // ╭──────────────────────────────────────────────────────╮ ╭──────────────────────────────────────────────────────╮
        KC_ESC,    KC_1,    KC_2,    KC_3,    KC_4,    KC_5,       KC_6,    KC_7,    KC_8,    KC_9,    KC_0, KC_MINS,
  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
        KC_TAB,    KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,       KC_Y,    TD_U,    KC_I,    KC_O,    KC_P, KC_BSLS,
  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
       KC_LSFT,    HR_A,    HR_S,    HR_D,    HR_F,    KC_G,       KC_H,    HR_J,    HR_K,    HR_L, HR_SCLN, KC_QUOT,
  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
       MO_SET,    PT_Z,    KC_X,    KC_C,    KC_V,    KC_B,       KC_N,    KC_M, KC_COMM,  KC_DOT, PT_SLSH, MO_SET,
  // ╰──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────╯
                                   LT_TAB, LT_BSPC, KC_LGUI,     MT_ENT,  LT_SPC,
                                           KC_LALT, KC_BSPC,     KC_DEL
  //                            ╰───────────────────────────╯ ╰──────────────────╯
  ),

  [LAYER_TRANSPARENT] = LAYOUT(
  // ╭──────────────────────────────────────────────────────╮ ╭──────────────────────────────────────────────────────╮
       _______, _______, _______, _______, _______, _______,    _______, _______, _______, _______, _______, _______,
  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
       _______, _______, _______, _______, _______, _______,    _______, _______, _______, _______, _______, _______,
  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
       _______, _______, _______, _______, _______, _______,    _______, _______, _______, _______, _______, _______,
  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
       _______, _______, _______, _______, _______, _______,    _______, _______, _______, _______, _______, _______,
  // ╰──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────╯
                                  _______, _______, _______,    _______, _______,
                                           _______, _______,    _______
  //                            ╰───────────────────────────╯ ╰──────────────────╯
  ),

  [LAYER_GAMING] = LAYOUT(
  // ╭──────────────────────────────────────────────────────╮ ╭──────────────────────────────────────────────────────╮
       _______, _______, _______, _______, _______, _______,    _______, _______, _______, _______, _______, _______,
  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
       _______, _______, _______, KC_E,    _______, _______,    _______, KC_U,    _______, _______, _______, _______,
  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
       _______, KC_A,    KC_S,    KC_D,    KC_F,    _______,    _______, KC_J,    KC_K,    KC_L, KC_SCLN, _______,
  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
       _______, _______, _______, _______, _______, KC_B,       _______, _______, _______, _______, _______, _______,
  // ╰──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────╯
                                  _______, _______, _______,    _______, _______,
                                           _______, _______,    _______
  //                            ╰───────────────────────────╯ ╰──────────────────╯
  ),

  [LAYER_POINTER] = LAYOUT(
  // ╭──────────────────────────────────────────────────────╮ ╭──────────────────────────────────────────────────────╮
       _______, _______, _______, _______, _______, _______,    _______, _______, _______, _______, _______, _______,
  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
       _______, _______, _______, _______, _______, _______,    KC_SLSH,    KC_7,    KC_8,    KC_9, KC_ASTR, _______,
  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
       _______, _______, _______, _______, _______, _______,    KC_MINS,    KC_4,    KC_5,    KC_6, KC_PLUS, _______,
  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
       _______, DRG_TOG, DRGSCRL, MS_BTN2, MS_BTN1, _______,      KC_0,    KC_1,    KC_2,    KC_3,  KC_DOT, _______,
  // ╰──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────╯
                                  _______, _______, _______,    _______, _______,
                                           _______, _______,    _______
  //                            ╰───────────────────────────╯ ╰──────────────────╯
  ),

  [LAYER_SYMBOL] = LAYOUT(
  // ╭──────────────────────────────────────────────────────╮ ╭──────────────────────────────────────────────────────╮
       _______, _______, _______, _______, _______, _______,    _______, _______, _______, _______, _______, _______,
  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
       _______, KC_GRV, KC_TILDE, KC_HASH, KC_AMPR, KC_PIPE,     KC_CIRC, KC_LCBR, KC_RCBR, KC_LBRC, KC_RBRC, _______,
  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
       _______, KC_EXLM,  KC_UNDS, KC_COLN,  KC_EQL,  KC_DLR,       KC_AT, KC_LPRN, KC_RPRN, KC_UNDS, KC_SCLN, _______,
  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
       _______, KC_PERC,  KC_QUES, KC_ASTR, KC_PLUS, KC_BSLS,     KC_SLSH, KC_MINS,   KC_LT,   KC_GT,  KC_DQT, _______,
  // ╰──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────╯
                                  _______, _______, _______,    _______, _______,
                                           _______, _______,    _______
  //                            ╰───────────────────────────╯ ╰──────────────────╯
  ),

  [LAYER_SETTINGS] = LAYOUT(
  // ╭──────────────────────────────────────────────────────╮ ╭──────────────────────────────────────────────────────╮
       RM_TOGG, XXXXXXX, XXXXXXX, XXXXXXX, DRG_TOG, TG(LAYER_TRANSPARENT),        DRGSCRL, _______,   KC_UP, _______, QK_BOOT,  EE_CLR,
  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
       WAYHALF, WAYFULL,  KC_CAD, KC_AENTER, S_D_MOD, XXXXXXX,    DPI_MOD, KC_LEFT, KC_DOWN, KC_RGHT, XXXXXXX, XXXXXXX,
  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
       RM_NEXT, RM_PREV, RM_VALU, RM_VALD, S_D_RMOD, XXXXXXX,   DPI_RMOD, _______, _______, _______, _______, XXXXXXX,
  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
       QK_BOOT,  EE_CLR, _______, _______, _______, _______,      SNIPING, _______, _______, _______,  KC_PGDN,  EE_CLR,
  // ╰──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────╯
                                  _______, _______, _______,    _______, _______,
                                           _______, _______,    _______
  //                            ╰───────────────────────────╯ ╰──────────────────╯
  ),
};
// clang-format on

bool process_record_user(uint16_t keycode, keyrecord_t *record) {
    switch (keycode) {
        case HR_L:
            if (record->event.pressed && record->tap.count && layer_state_is(LAYER_TRANSPARENT)) {
                uint8_t mods    = get_mods();
                uint8_t weak    = get_weak_mods();
                uint8_t oneshot = get_oneshot_mods();

                if ((mods | weak | oneshot) & MOD_MASK_GUI) {
                    // GUI is already held; just tap N so the host sees GUI+N.
                    tap_code(KC_N);
                    return false;
                }
            }
            break;
    }

    return true;
}

bool caps_word_press_user(uint16_t keycode) {
    switch (keycode) {
        // Keycodes that continue Caps Word, with shift applied.
        case KC_A ... KC_Z:
        case TD(TD_UNDO): // Treat tap dance U like a letter
            add_weak_mods(MOD_BIT(KC_LSFT));
            return true;

        // Keycodes that continue Caps Word, without shifting.
        case KC_1 ... KC_0:
        case KC_BSPC:
        case KC_DEL:
        case KC_UNDS:
        case KC_MINS:
            return true;

        default:
            return false; // Deactivate Caps Word.
    }
}

#ifdef POINTING_DEVICE_ENABLE
report_mouse_t pointing_device_task_user(report_mouse_t mouse_report) {
#    ifdef CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_ENABLE
    if (abs(mouse_report.x) > CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_THRESHOLD || abs(mouse_report.y) > CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_THRESHOLD) {
        if (auto_pointer_layer_timer == 0) {
            layer_on(LAYER_SETTINGS);
#        ifdef RGB_MATRIX_ENABLE
            rgb_matrix_mode_noeeprom(RGB_MATRIX_NONE);
            rgb_matrix_sethsv_noeeprom(HSV_GREEN);
#        endif // RGB_MATRIX_ENABLE
        }
        auto_pointer_layer_timer = timer_read();
    }
#    endif // CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_ENABLE

    mouse_report.v = -mouse_report.v;
    return mouse_report;
}

#    ifdef CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_ENABLE
void matrix_scan_user(void) {
    if (auto_pointer_layer_timer != 0 && TIMER_DIFF_16(timer_read(), auto_pointer_layer_timer) >= CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_TIMEOUT_MS) {
        auto_pointer_layer_timer = 0;
        layer_off(LAYER_SETTINGS);
#        ifdef RGB_MATRIX_ENABLE
        rgb_matrix_mode_noeeprom(RGB_MATRIX_DEFAULT_MODE);
#        endif // RGB_MATRIX_ENABLE
    }
}
#    endif // CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_ENABLE

#    ifdef CHARYBDIS_AUTO_SNIPING_ON_LAYER
layer_state_t layer_state_set_user(layer_state_t state) {
    charybdis_set_pointer_sniping_enabled(layer_state_cmp(state, CHARYBDIS_AUTO_SNIPING_ON_LAYER));
    return state;
}
#    endif // CHARYBDIS_AUTO_SNIPING_ON_LAYER
#endif     // POINTING_DEVICE_ENABLE

#ifdef RGB_MATRIX_ENABLE
// Forward-declare this helper function since it is defined in rgb_matrix.c.
void rgb_matrix_update_pwm_buffers(void);
#endif