/* Copyright 2022 schwarzer-geiger
 *
 * 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

enum layer_names {
    _BASE,
    _LOWER,
    _RAISE,
    _ADJUST
};

#define LOWER  MO(_LOWER)
#define RAISE  MO(_RAISE)
#define ADJUST MO(_ADJUST)

const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
  [_BASE] = LAYOUT(
    KC_TAB,   KC_Q,     KC_W,     KC_E,     KC_R,      KC_T,               KC_Y,     KC_U,     KC_I,     KC_O,     KC_P,     KC_BSPC,
    KC_LCTL,  KC_A,     KC_S,     KC_D,     KC_F,      KC_G,               KC_H,     KC_J,     KC_K,     KC_L,     KC_SCLN,  KC_QUOT,
    KC_LSFT,  KC_Z,     KC_X,     KC_C,     KC_V,      KC_B,               KC_N,     KC_M,     KC_COMM,  KC_DOT,   KC_SLSH,  RSFT_T(KC_ENT),
                                            KC_LALT,   LOWER,    KC_SPC,   RAISE,    KC_RGUI
  ),

  [_LOWER] = LAYOUT(
    _______,  KC_EXLM,  KC_AT,    KC_HASH,  KC_DLR,    KC_PERC,            KC_CIRC,  KC_AMPR,  KC_ASTR,  KC_LPRN,  KC_RPRN,  KC_DEL,
    _______,  KC_UNDS,  KC_PLUS,  KC_LCBR,  KC_RCBR,   KC_PIPE,            KC_LEFT,  KC_DOWN,  KC_UP,    KC_RGHT,  KC_GRV,   KC_TILD,
    _______,  KC_ESC,   KC_LGUI,  KC_LALT,  KC_CAPS,   KC_DQUO,            KC_HOME,  KC_END,   KC_PGUP,  KC_PGDN,  KC_PSCR,  RSFT_T(KC_SPC),
                                            _______,   _______,  KC_ENT,   _______,  _______
  ),

  [_RAISE] = LAYOUT(
    _______,  KC_1,     KC_2,     KC_3,     KC_4,      KC_5,               KC_6,     KC_7,     KC_8,     KC_9,     KC_0,     KC_DEL,
    _______,  KC_MINS,  KC_EQL,   KC_LBRC,  KC_RBRC,   KC_BSLS,            KC_F1,    KC_F2,    KC_F3,    KC_F4,    KC_F5,    KC_F6,
    _______,  KC_ESC,   KC_RGUI,  KC_RALT,  KC_CAPS,   KC_QUOT,            KC_F7,    KC_F8,    KC_F9,    KC_F10,   KC_F11,   KC_F12,
                                            _______,   _______,  KC_BSPC,  _______,  _______
  ),

  [_ADJUST] = LAYOUT(
    UG_VALU,   UG_SATU, UG_HUEU,  UG_NEXT,  XXXXXXX,   UG_TOGG,            XXXXXXX,  XXXXXXX,  XXXXXXX,  XXXXXXX,  XXXXXXX,  XXXXXXX,
    UG_VALD,   UG_SATD, UG_HUED,  UG_PREV,  XXXXXXX,   XXXXXXX,            XXXXXXX,  XXXXXXX,  XXXXXXX,  XXXXXXX,  XXXXXXX,  XXXXXXX,
    XXXXXXX,   XXXXXXX, XXXXXXX,  XXXXXXX,  XXXXXXX,   XXXXXXX,            QK_BOOT,  XXXXXXX,  XXXXXXX,  XXXXXXX,  XXXXXXX,  XXXXXXX,
                                            _______,   _______,  XXXXXXX,  _______,  _______
  ),
};


// Thumbstick keymap, change KC_XXX to whatever you need

#define THUMBSTICK_RIGHT_TAP KC_RIGHT
#define THUMBSTICK_LEFT_TAP KC_LEFT
#define THUMBSTICK_UP_TAP KC_UP
#define THUMBSTICK_DOWN_TAP KC_DOWN

// Thumbstick code, no customisation needed

bool cursor_mode = false;
bool scrolling_mode = false;
bool tapping_mode = false;

// tracks if thumbstick was released
bool returned_to_zero = true;

// tracks how many times mouse_report.x/y have been read zero in succession
uint16_t zero_reads = 0;

// set mode depending on layer
layer_state_t layer_state_set_user(layer_state_t state) {
    state = update_tri_layer_state(state, _LOWER, _RAISE, _ADJUST);
    switch (get_highest_layer(state)) {
        case SCROLLING_LAYER:
            if (scrolling_mode == false) {
            scrolling_mode = true;
            }
            if (tapping_mode) {
                tapping_mode = false;
            }
            if (cursor_mode) {
                cursor_mode = false;
            }
            break;
        case TAPPING_LAYER:
            if (tapping_mode == false) {
                tapping_mode = true;
            }
            if (cursor_mode) {
                cursor_mode = false;
            }
            if (scrolling_mode) {
                scrolling_mode = false;
            }
            break;
        default:
            if (scrolling_mode) {
                scrolling_mode = false;
            }
            if (tapping_mode) {
                tapping_mode = false;
            }
            if (cursor_mode == false) {
                cursor_mode = true;
            }
            break;
    }
    return state;
}

// manipulate mouse report based on current mode
report_mouse_t pointing_device_task_user(report_mouse_t mouse_report) {

    if (cursor_mode) {
        mouse_report.x = CURSOR_SPEED * mouse_report.x/100;
        mouse_report.y = CURSOR_SPEED * mouse_report.y/100;
    }
    if (scrolling_mode) {
        mouse_report.h = SCROLL_SPEED * mouse_report.x/100;
        mouse_report.v = SCROLL_SPEED * mouse_report.y/100;
        mouse_report.x = 0;
        mouse_report.y = 0;
        if ((mouse_report.h != 0) | (mouse_report.v != 0)) {
            _delay_ms(SCROLL_DELAY_MS);
        }

    } else if (tapping_mode) {
        if ((mouse_report.x || mouse_report.y) != 0) {
            if (returned_to_zero) {
                if (mouse_report.x > 0) {
                    tap_code16(THUMBSTICK_RIGHT_TAP);
                }
                if (mouse_report.x < 0) {
                    tap_code16(THUMBSTICK_LEFT_TAP);
                }
                if (mouse_report.y > 0) {
                    tap_code16(THUMBSTICK_DOWN_TAP);
                }
                if (mouse_report.y < 0) {
                    tap_code16(THUMBSTICK_UP_TAP);
                }
                returned_to_zero = false;
            }
            zero_reads = 0;
        } else if (zero_reads < 20) {
            zero_reads++;
        }
        if (zero_reads >= 20) {
            if (returned_to_zero == false) {
                returned_to_zero = true;
            }
        }
        mouse_report.x = 0;
        mouse_report.y = 0;
    }

    return mouse_report;
}