/*
Copyright 2012-2018 Jun Wako, Jack Humbert, Yiancar

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 <stdint.h>
#include <stdbool.h>
#include <string.h>
#include "util.h"
#include "matrix.h"
#include "debounce.h"
#include "atomic_util.h"
#undef SPLIT_KEYBOARD
#define SPLIT_KEYBOARD
#    include "split_common/split_util.h"
#    include "split_common/transactions.h"

#ifdef RGB_MATRIX_ENABLE
#    include "rgb_matrix.h"
#endif

#    define ROWS_PER_HAND (MATRIX_ROWS / 2)



#    define SPLIT_MUTABLE const


#    define SPLIT_MUTABLE_ROW

#    define SPLIT_MUTABLE_COL

#    define MATRIX_INPUT_PRESSED_STATE 0




static SPLIT_MUTABLE_ROW pin_t row_pins[ROWS_PER_HAND] = MATRIX_ROW_PINS;

static SPLIT_MUTABLE_COL pin_t col_pins[MATRIX_COLS]   = MATRIX_COL_PINS;



/* matrix state(1:on, 0:off) */
extern matrix_row_t raw_matrix[MATRIX_ROWS]; // raw values
extern matrix_row_t matrix[MATRIX_ROWS];     // debounced values

// row offsets for each hand
extern uint8_t thisHand, thatHand;

// user-defined overridable functions
__attribute__((weak)) void matrix_init_pins(void);
__attribute__((weak)) void matrix_read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row);
__attribute__((weak)) void matrix_read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col, matrix_row_t row_shifter);

static inline void gpio_atomic_set_pin_output_low(pin_t pin) {
    ATOMIC_BLOCK_FORCEON {
        gpio_set_pin_output(pin);
        gpio_write_pin_low(pin);
    }
}

static inline void gpio_atomic_set_pin_output_high(pin_t pin) {
    ATOMIC_BLOCK_FORCEON {
        gpio_set_pin_output(pin);
        gpio_write_pin_high(pin);
    }
}

static inline void gpio_atomic_set_pin_input_high(pin_t pin) {
    ATOMIC_BLOCK_FORCEON {
        gpio_set_pin_input_high(pin);
    }
}

static inline uint8_t readMatrixPin(pin_t pin) {
    if (pin != NO_PIN) {
        return (gpio_read_pin(pin) == MATRIX_INPUT_PRESSED_STATE) ? 0 : 1;
    } else {
        return 1;
    }
}

// matrix code


static bool select_row(uint8_t row) {
    pin_t pin = row_pins[row];
    if (pin != NO_PIN) {
        gpio_atomic_set_pin_output_low(pin);
        return true;
    }
    return false;
}

static void unselect_row(uint8_t row) {
    pin_t pin = row_pins[row];
    if (pin != NO_PIN) {
#            ifdef MATRIX_UNSELECT_DRIVE_HIGH
        gpio_atomic_set_pin_output_high(pin);
#            else
        gpio_atomic_set_pin_input_high(pin);
#            endif
    }
}

static void unselect_rows(void) {
    for (uint8_t x = 0; x < ROWS_PER_HAND; x++) {
        unselect_row(x);
    }
}

__attribute__((weak)) void matrix_init_pins(void) {
    unselect_rows();
    for (uint8_t x = 0; x < MATRIX_COLS; x++) {
        if (col_pins[x] != NO_PIN) {
            gpio_atomic_set_pin_input_high(col_pins[x]);
        }
    }
}

__attribute__((weak)) void matrix_read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
    // Start with a clear matrix row
    matrix_row_t current_row_value = 0;

    if (!select_row(current_row)) { // Select row
        return;                     // skip NO_PIN row
    }
    matrix_output_select_delay();

    // For each col...
    matrix_row_t row_shifter = MATRIX_ROW_SHIFTER;
    for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++, row_shifter <<= 1) {
        uint8_t pin_state = readMatrixPin(col_pins[col_index]);

        // Populate the matrix row with the state of the col pin
        current_row_value |= pin_state ? 0 : row_shifter;
    }

    // Unselect row
    unselect_row(current_row);
    matrix_output_unselect_delay(current_row, current_row_value != 0); // wait for all Col signals to go HIGH

    // Update the matrix
    current_matrix[current_row] = current_row_value;
}



void matrix_init(void) {

    // Set pinout for right half if pinout for that half is defined
    if (!isLeftHand) {


        const pin_t row_pins_right[ROWS_PER_HAND] = MATRIX_ROW_PINS_RIGHT;
        for (uint8_t i = 0; i < ROWS_PER_HAND; i++) {
            row_pins[i] = row_pins_right[i];
        }


        const pin_t col_pins_right[MATRIX_COLS] = MATRIX_COL_PINS_RIGHT;
        for (uint8_t i = 0; i < MATRIX_COLS; i++) {
            col_pins[i] = col_pins_right[i];
        }

    }

    thisHand = isLeftHand ? 0 : (ROWS_PER_HAND);
    thatHand = ROWS_PER_HAND - thisHand;


    // initialize key pins
    matrix_init_pins();

    // initialize matrix state: all keys off
    memset(matrix, 0, sizeof(matrix));
    memset(raw_matrix, 0, sizeof(raw_matrix));

    debounce_init(ROWS_PER_HAND);

    matrix_init_kb();
}
#include "print.h"
#include "wait.h"
bool is_master_qf = false;

#ifndef SPLIT_USB_TIMEOUT
#    define SPLIT_USB_TIMEOUT 2000
#endif
#ifndef SPLIT_USB_TIMEOUT_POLL
#    define SPLIT_USB_TIMEOUT_POLL 10
#endif
 extern bool usb_connected_state(void) ;
 bool usb_bus_detected(void) {
    for (uint16_t i = 0; i < (SPLIT_USB_TIMEOUT / SPLIT_USB_TIMEOUT_POLL); i++) {
        // This will return true if a USB connection has been established
        if (usb_connected_state()) {
            return true;
        }
        wait_ms(SPLIT_USB_TIMEOUT_POLL);
    }
    return false;
}

bool is_keyboard_master_impl(void) {
    bool is_master = usb_bus_detected();
    xprintf("11111 is_keyboard_master: %d\n", is_master);
    // Avoid NO_USB_STARTUP_CHECK - Disable USB as the previous checks seem to enable it somehow
    // if (!is_master) {
    //     usb_disconnect();
    // }
    //return is_master;
    if(is_master){
        is_master_qf=true;
    }
    //if(is_master_qf){
        return is_master;
    //}
    // return false;
}

static bool  last_connected              = false;
uint32_t counter1 = 1;

#ifdef RGB_MATRIX_ENABLE
static void rgb_matrix_sync_remote_half(matrix_row_t remote_prev[ROWS_PER_HAND], uint8_t remote_offset) {
    for (uint8_t r = 0; r < ROWS_PER_HAND; r++) {
        const uint8_t      row     = remote_offset + r;
        const matrix_row_t current = matrix[row];
        const matrix_row_t delta   = current ^ remote_prev[r];

        if (!delta) {
            continue;
        }

        matrix_row_t col_mask = 1;
        for (uint8_t col = 0; col < MATRIX_COLS; col++, col_mask <<= 1) {
            if (delta & col_mask) {
                rgb_matrix_handle_key_event(row, col, current & col_mask);
            }
        }

        remote_prev[r] = current;
    }
}
#endif

void matrix_scan_kb(void) {
#ifdef RGB_MATRIX_ENABLE
    static matrix_row_t master_remote_prev[ROWS_PER_HAND] = {0};
    static matrix_row_t slave_mirror_prev[ROWS_PER_HAND]  = {0};

    if (is_keyboard_master()) {
        rgb_matrix_sync_remote_half(master_remote_prev, thatHand);
    } else {
        rgb_matrix_sync_remote_half(slave_mirror_prev, thatHand);
    }
#endif

    matrix_scan_user();
}

bool matrix_post_scan_qf(void) {
    counter1++;
    bool changed = false;
    if (is_keyboard_master()) {

        matrix_row_t slave_matrix[ROWS_PER_HAND] = {0};
        if (transport_master_if_connected(matrix + thisHand, slave_matrix)) {
            changed = memcmp(matrix + thatHand, slave_matrix, sizeof(slave_matrix)) != 0;

            last_connected = true;
        } else if (last_connected) {
            // reset other half when disconnected
            memset(slave_matrix, 0, sizeof(slave_matrix));
            changed = true;

            last_connected = false;
        }

        if (changed) memcpy(matrix + thatHand, slave_matrix, sizeof(slave_matrix));
    } else {
         if(counter1 % 15000 ==0){
            // extern  bool usb_bus_detected(void);

            if(usb_connected_state()){

                xprintf("222 usb_bus_detected! this is master!!! %ld\n",counter1/1000);

                 __set_FAULTMASK(1);
                 NVIC_SystemReset();
            }
        }
        matrix_row_t remote_before[ROWS_PER_HAND];
        memcpy(remote_before, matrix + thatHand, sizeof(remote_before));

        transport_slave(matrix + thatHand, matrix + thisHand);

        if (memcmp(remote_before, matrix + thatHand, sizeof(remote_before)) != 0) {
            changed = true;
        }

        matrix_slave_scan_kb();
    }

    matrix_scan_kb();

    return changed;
}


uint8_t matrix_scan(void) {
    matrix_row_t curr_matrix[MATRIX_ROWS] = {0};

    // Set row, read cols
    for (uint8_t current_row = 0; current_row < ROWS_PER_HAND; current_row++) {
        matrix_read_cols_on_row(curr_matrix, current_row);
    }


    bool changed = memcmp(raw_matrix, curr_matrix, sizeof(curr_matrix)) != 0;
    if (changed) memcpy(raw_matrix, curr_matrix, sizeof(curr_matrix));


    changed = debounce(raw_matrix, matrix + thisHand, ROWS_PER_HAND, changed) | matrix_post_scan_qf();

    return (uint8_t)changed;
}