#include QMK_KEYBOARD_H

#ifdef OLED_ENABLE

// Layer names
enum layer_names {
  _QWERTY,
  _NUMBER,
  _SYMBOL,
  _SYMBOL2,
  _SYMBOL_NEW,
  _NAV,
  _FUNC,
  _DEV,
  _UTIL,
  _MEDIA,
};

oled_rotation_t oled_init_user(oled_rotation_t rotation) { 
    return OLED_ROTATION_270; 
}

void render_space(void) {
    oled_write_P(PSTR("     "), false);
}

void render_mod_status_gui_alt(uint8_t modifiers) {
    static const char PROGMEM gui_off_1[] = {0x85, 0x86, 0};
    static const char PROGMEM gui_off_2[] = {0xa5, 0xa6, 0};
    static const char PROGMEM gui_on_1[] = {0x8d, 0x8e, 0};
    static const char PROGMEM gui_on_2[] = {0xad, 0xae, 0};

    static const char PROGMEM alt_off_1[] = {0x87, 0x88, 0};
    static const char PROGMEM alt_off_2[] = {0xa7, 0xa8, 0};
    static const char PROGMEM alt_on_1[] = {0x8f, 0x90, 0};
    static const char PROGMEM alt_on_2[] = {0xaf, 0xb0, 0};

    static const char PROGMEM off_off_1[] = {0xc5, 0};
    static const char PROGMEM off_off_2[] = {0xc6, 0};
    static const char PROGMEM on_off_1[] = {0xc7, 0};
    static const char PROGMEM on_off_2[] = {0xc8, 0};
    static const char PROGMEM off_on_1[] = {0xc9, 0};
    static const char PROGMEM off_on_2[] = {0xca, 0};
    static const char PROGMEM on_on_1[] = {0xcb, 0};
    static const char PROGMEM on_on_2[] = {0xcc, 0};

    if(modifiers & MOD_MASK_GUI) {
        oled_write_P(gui_on_1, false);
    } else {
        oled_write_P(gui_off_1, false);
    }

    if ((modifiers & MOD_MASK_GUI) && (modifiers & MOD_MASK_ALT)) {
        oled_write_P(on_on_1, false);
    } else if(modifiers & MOD_MASK_GUI) {
        oled_write_P(on_off_1, false);
    } else if(modifiers & MOD_MASK_ALT) {
        oled_write_P(off_on_1, false);
    } else {
        oled_write_P(off_off_1, false);
    }

    if(modifiers & MOD_MASK_ALT) {
        oled_write_P(alt_on_1, false);
    } else {
        oled_write_P(alt_off_1, false);
    }

    if(modifiers & MOD_MASK_GUI) {
        oled_write_P(gui_on_2, false);
    } else {
        oled_write_P(gui_off_2, false);
    }

    if (modifiers & MOD_MASK_GUI & MOD_MASK_ALT) {
        oled_write_P(on_on_2, false);
    } else if(modifiers & MOD_MASK_GUI) {
        oled_write_P(on_off_2, false);
    } else if(modifiers & MOD_MASK_ALT) {
        oled_write_P(off_on_2, false);
    } else {
        oled_write_P(off_off_2, false);
    }

    if(modifiers & MOD_MASK_ALT) {
        oled_write_P(alt_on_2, false);
    } else {
        oled_write_P(alt_off_2, false);
    }
}

void render_mod_status_ctrl_shift(uint8_t modifiers) {
    static const char PROGMEM ctrl_off_1[] = {0x89, 0x8a, 0};
    static const char PROGMEM ctrl_off_2[] = {0xa9, 0xaa, 0};
    static const char PROGMEM ctrl_on_1[] = {0x91, 0x92, 0};
    static const char PROGMEM ctrl_on_2[] = {0xb1, 0xb2, 0};

    static const char PROGMEM shift_off_1[] = {0x8b, 0x8c, 0};
    static const char PROGMEM shift_off_2[] = {0xab, 0xac, 0};
    static const char PROGMEM shift_on_1[] = {0xcd, 0xce, 0};
    static const char PROGMEM shift_on_2[] = {0xcf, 0xd0, 0};

    static const char PROGMEM off_off_1[] = {0xc5, 0};
    static const char PROGMEM off_off_2[] = {0xc6, 0};
    static const char PROGMEM on_off_1[] = {0xc7, 0};
    static const char PROGMEM on_off_2[] = {0xc8, 0};
    static const char PROGMEM off_on_1[] = {0xc9, 0};
    static const char PROGMEM off_on_2[] = {0xca, 0};
    static const char PROGMEM on_on_1[] = {0xcb, 0};
    static const char PROGMEM on_on_2[] = {0xcc, 0};

    if(modifiers & MOD_MASK_CTRL) {
        oled_write_P(ctrl_on_1, false);
    } else {
        oled_write_P(ctrl_off_1, false);
    }

    if ((modifiers & MOD_MASK_CTRL) && (modifiers & MOD_MASK_SHIFT)) {
        oled_write_P(on_on_1, false);
    } else if(modifiers & MOD_MASK_CTRL) {
        oled_write_P(on_off_1, false);
    } else if(modifiers & MOD_MASK_SHIFT) {
        oled_write_P(off_on_1, false);
    } else {
        oled_write_P(off_off_1, false);
    }

    if(modifiers & MOD_MASK_SHIFT) {
        oled_write_P(shift_on_1, false);
    } else {
        oled_write_P(shift_off_1, false);
    }

    if(modifiers & MOD_MASK_CTRL) {
        oled_write_P(ctrl_on_2, false);
    } else {
        oled_write_P(ctrl_off_2, false);
    }

    if (modifiers & MOD_MASK_CTRL & MOD_MASK_SHIFT) {
        oled_write_P(on_on_2, false);
    } else if(modifiers & MOD_MASK_CTRL) {
        oled_write_P(on_off_2, false);
    } else if(modifiers & MOD_MASK_SHIFT) {
        oled_write_P(off_on_2, false);
    } else {
        oled_write_P(off_off_2, false);
    }

    if(modifiers & MOD_MASK_SHIFT) {
        oled_write_P(shift_on_2, false);
    } else {
        oled_write_P(shift_off_2, false);
    }
}

void render_logo(void) {
    static const char PROGMEM corne_logo[] = {
        0x80, 0x81, 0x82, 0x83, 0x84,
        0xa0, 0xa1, 0xa2, 0xa3, 0xa4,
        0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0};
    oled_write_P(corne_logo, false);
    oled_write_P(PSTR("corne"), false);
}

void render_layer_state(void) {
    static const char PROGMEM default_layer[] = {
        0x20, 0x94, 0x95, 0x96, 0x20,
        0x20, 0xb4, 0xb5, 0xb6, 0x20,
        0x20, 0xd4, 0xd5, 0xd6, 0x20, 0};
    static const char PROGMEM raise_layer[] = {
        0x20, 0x97, 0x98, 0x99, 0x20,
        0x20, 0xb7, 0xb8, 0xb9, 0x20,
        0x20, 0xd7, 0xd8, 0xd9, 0x20, 0};
    static const char PROGMEM lower_layer[] = {
        0x20, 0x9a, 0x9b, 0x9c, 0x20,
        0x20, 0xba, 0xbb, 0xbc, 0x20,
        0x20, 0xda, 0xdb, 0xdc, 0x20, 0};
    static const char PROGMEM adjust_layer[] = {
        0x20, 0x9d, 0x9e, 0x9f, 0x20,
        0x20, 0xbd, 0xbe, 0xbf, 0x20,
        0x20, 0xdd, 0xde, 0xdf, 0x20, 0};
    if(layer_state_is(_DEV)) {
        oled_write_P(adjust_layer, false);
    } else if(layer_state_is(_NUMBER)) {
        oled_write_P(lower_layer, false);
    } else if(layer_state_is(_SYMBOL)) {
        oled_write_P(raise_layer, false);
    } else {
        oled_write_P(default_layer, false);
    }
}

bool oled_task_user(void) {
    render_logo();
    render_space();
    render_layer_state();
    render_space();
    render_mod_status_gui_alt(get_mods()|get_oneshot_mods());
    render_mod_status_ctrl_shift(get_mods()|get_oneshot_mods());
    return false;
}

#endif