/* Copyright 2017 Zach White <skullydazed@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 "2019.h"

void matrix_init_kb(void) {
    // Set our LED pins as output
    gpio_set_pin_output(D6);

    // Set our Tilt Sensor pins as input
    gpio_set_pin_input_high(SHAKE_PIN_A);
    gpio_set_pin_input_high(SHAKE_PIN_B);

    // Run the keymap level init
    matrix_init_user();
}

#ifdef DRAWING_ENABLE
bool drawing_mode = false;
bool btn1_pressed = false;
bool btn2_pressed = false;
bool btn3_pressed = false;
bool btn4_pressed = false;

void check_encoder_buttons(void) {
    if (btn1_pressed && btn2_pressed && btn3_pressed && btn4_pressed) {
        // All 4 buttons pressed, toggle drawing mode
	if (drawing_mode) {
            dprintf("Turning drawing mode off.\n");
            drawing_mode = false;
            gpio_write_pin_low(D6);
	    unregister_code(KC_BTN1);
	} else {
            dprintf("Turning drawing mode on.\n");
            drawing_mode = true;
            gpio_write_pin_high(D6);
	    register_code(KC_BTN1);
	}
    }
}
#endif

#ifdef SHAKE_ENABLE
uint8_t tilt_state = 0x11;
uint8_t detected_shakes = 0;
static uint16_t shake_timer;
#endif

void housekeeping_task_kb(void) {
#ifdef SHAKE_ENABLE
    // Read the current state of the tilt sensor. It is physically
    // impossible for both pins to register a low state at the same time.
    uint8_t tilt_read = (gpio_read_pin(SHAKE_PIN_A) << 4) | gpio_read_pin(SHAKE_PIN_B);

    // Check to see if the tilt sensor has changed state since our last read
    if (tilt_state != tilt_read) {
        shake_timer = timer_read();
        detected_shakes++;
        tilt_state = tilt_read;
    }

    if ((detected_shakes > 0) && (timer_elapsed(shake_timer) > SHAKE_TIMEOUT)) {
        if (detected_shakes > SHAKE_COUNT) {
            dprintf("Shake triggered! We detected %d shakes.\n", detected_shakes);
            tap_code16(SHAKE_KEY);
        } else {
            dprintf("Shake not triggered! We detected %d shakes.\n", detected_shakes);
        }
        detected_shakes = 0;
    }
#endif
}

bool process_record_kb(uint16_t keycode, keyrecord_t *record) {
#ifdef DRAWING_ENABLE
    if (keycode == ENC_BTN1) {
        if (record->event.pressed) {
            btn1_pressed = true;
	    register_code(KC_BTN1);
	} else {
            btn1_pressed = false;
	    unregister_code(KC_BTN1);
	}
    }
    if (keycode == ENC_BTN2) {
        if (record->event.pressed) {
            btn2_pressed = true;
	    register_code(KC_BTN2);
	} else {
            btn2_pressed = false;
	    unregister_code(KC_BTN2);
	}
    }
    if (keycode == ENC_BTN3) {
        if (record->event.pressed) {
            btn3_pressed = true;
	    register_code(KC_BTN3);
	} else {
            btn3_pressed = false;
	    unregister_code(KC_BTN3);
	}
    }
    if (keycode == ENC_BTN4) {
        if (record->event.pressed) {
            btn4_pressed = true;
	    register_code(KC_BTN4);
	} else {
            btn4_pressed = false;
	    unregister_code(KC_BTN4);
	}
    }

    check_encoder_buttons();
#endif

    return process_record_user(keycode, record);
}

bool encoder_update_kb(uint8_t index, bool clockwise) {
    if (encoder_update_user(index, clockwise)) {
        // Encoder 1, outside left
        if (index == 0 && clockwise) {
            tap_code(KC_MS_U);  // turned right
        } else if (index == 0) {
            tap_code(KC_MS_D);  // turned left
        }

        // Encoder 2, inside left
        else if (index == 1 && clockwise) {
            tap_code(KC_WH_D);  // turned right
        } else if (index == 1) {
            tap_code(KC_WH_U);  // turned left
        }

        // Encoder 3, inside right
        else if (index == 2 && clockwise) {
            tap_code(KC_VOLU);  // turned right
        } else if (index == 2) {
            tap_code(KC_VOLD);  // turned left
        }

        // Encoder 4, outside right
        else if (index == 3 && clockwise) {
            tap_code(KC_MS_R);   // turned right
        } else if (index == 3) {
            tap_code(KC_MS_L);   // turned left
        }
    }
    return true;
}