/*
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 "wait.h"
#include "print.h"
#include "debug.h"
#include "util.h"
#include "matrix.h"
#include "debounce.h"
#include "quantum.h"
#include "board.h"

#if (MATRIX_COLS <= 8)
#    define print_matrix_header() print("\nr/c 01234567\n")
#    define print_matrix_row(row) print_bin_reverse8(matrix_get_row(row))
#    define matrix_bitpop(i) bitpop(matrix[i])
#    define ROW_SHIFTER ((uint8_t)1)
#elif (MATRIX_COLS <= 16)
#    define print_matrix_header() print("\nr/c 0123456789ABCDEF\n")
#    define print_matrix_row(row) print_bin_reverse16(matrix_get_row(row))
#    define matrix_bitpop(i) bitpop16(matrix[i])
#    define ROW_SHIFTER ((uint16_t)1)
#elif (MATRIX_COLS <= 32)
#    define print_matrix_header() print("\nr/c 0123456789ABCDEF0123456789ABCDEF\n")
#    define print_matrix_row(row) print_bin_reverse32(matrix_get_row(row))
#    define matrix_bitpop(i) bitpop32(matrix[i])
#    define ROW_SHIFTER ((uint32_t)1)
#endif

#ifdef MATRIX_MASKED
extern const matrix_row_t matrix_mask[];
#endif

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

__attribute__((weak)) void matrix_init_quantum(void) { matrix_init_kb(); }

__attribute__((weak)) void matrix_scan_quantum(void) { matrix_scan_kb(); }

__attribute__((weak)) void matrix_init_kb(void) { matrix_init_user(); }

__attribute__((weak)) void matrix_scan_kb(void) { matrix_scan_user(); }

__attribute__((weak)) void matrix_init_user(void) {}

__attribute__((weak)) void matrix_scan_user(void) {}

inline matrix_row_t matrix_get_row(uint8_t row) {
    // Matrix mask lets you disable switches in the returned matrix data. For example, if you have a
    // switch blocker installed and the switch is always pressed.
#ifdef MATRIX_MASKED
    return matrix[row] & matrix_mask[row];
#else
    return matrix[row];
#endif
}

void matrix_print(void) {
    print_matrix_header();

    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
        phex(row);
        print(": ");
        print_matrix_row(row);
        print("\n");
    }
}

void matrix_init(void) {
    // initialize key pins
    board_init();

    // initialize matrix state: all keys off
    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
        raw_matrix[i] = 0;
        matrix[i]     = 0;
    }

    debounce_init(MATRIX_ROWS);

    matrix_init_quantum();
}

uint8_t matrix_scan(void) {
    bool changed = false;

    // Set row, read cols
    for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
        changed |= board_read_cols_on_row(raw_matrix, current_row);
    }

    debounce(raw_matrix, matrix, MATRIX_ROWS, changed);

    matrix_scan_quantum();
    return 1;
}