#include <assert.h>

#include "basic_testing.h"

#include "../chess_paths.h"

struct chessboard {
    unsigned int C;
    unsigned int R;
};

int value_at(const struct chessboard * c, unsigned int column, unsigned int row) {
    return column + row * c->C;
}

unsigned int columns(const struct chessboard * c) {
    return c->C;
}

unsigned int rows(const struct chessboard * c) {
    return c->R;
};

TEST(inc_pawn) {
    struct chessboard c = {.C = 100000, .R = 10000 };
    struct piece_position p;
    p.piece = PAWN;
    p.column = 12345;
    p.row = 1;
    assert_uint_eq(increasing_path_len(&c, &p), 9998);
    assert_uint_eq(p.column, 12345);
    assert_uint_eq(p.row, 9999);
    TEST_PASSED;
}

TEST(inc_king) {
    struct chessboard c = {.C = 100000, .R = 10000 };
    struct piece_position p;
    p.piece = KING;
    p.column = 1;
    p.row = 0;
    assert_uint_eq(increasing_path_len(&c, &p), 99998);
    assert_uint_eq(p.column, 99999);
    assert_uint_eq(p.row, 9999);
    TEST_PASSED;
}

TEST(inc_queen) {
    struct chessboard c = {.C = 100000, .R = 10000 };
    struct piece_position p;
    p.piece = QUEEN;
    p.column = 345;
    p.row = 4123;
    assert_uint_eq(increasing_path_len(&c, &p), 2);
    assert_uint_eq(p.column, 99999);
    assert_uint_eq(p.row, 9999);
    TEST_PASSED;
}

TEST(inc_knight) {
    struct chessboard c = {.C = 100000, .R = 10000 };
    struct piece_position p;
    p.piece = KNIGHT;
    p.column = 12345;
    p.row = 1;
    assert_uint_eq(increasing_path_len(&c, &p), 4999);
    assert_uint_eq(p.column, 17344);
    assert_uint_eq(p.row, 9999);
    TEST_PASSED;
}

TEST(inc_bishop) {
    struct chessboard c = {.C = 100000, .R = 10000 };
    struct piece_position p;
    p.piece = BISHOP;
    p.column = 12345;
    p.row = 0;
    assert_uint_eq(increasing_path_len(&c, &p), 1);
    assert_uint_eq(p.column, 22344);
    assert_uint_eq(p.row, 9999);
    TEST_PASSED;
}

TEST(inc_rook) {
    struct chessboard c = {.C = 100000, .R = 10000 };
    struct piece_position p;
    p.piece = ROOK;
    p.column = 12345;
    p.row = 4321;
    assert_uint_eq(increasing_path_len(&c, &p), 2);
    assert_uint_eq(p.column, 99999);
    assert_uint_eq(p.row, 9999);
    TEST_PASSED;
}

int main() {
    RUN_TEST(inc_pawn);
    RUN_TEST(inc_king);
    RUN_TEST(inc_queen);
    RUN_TEST(inc_knight);
    RUN_TEST(inc_bishop);
    RUN_TEST(inc_rook);
    PRINT_TEST_RESULTS;
    assert(ALL_TESTS_PASSED);
}