#include "filetape.h"
#include <catch2/catch_test_macros.hpp>
#include <cstdio>

// NOLINTBEGIN(readability-function-cognitive-complexity)
TEST_CASE("Reading data from a FileTape", "[filetape]") {
    tape::FileTape tape("assets/filetape_test_data.txt");

    SECTION("Read all data sequentially") {
        REQUIRE(tape.read() == 1);
        REQUIRE(tape.seek_forward() == true);
        REQUIRE(tape.read() == 2);
        REQUIRE(tape.seek_forward() == true);
        REQUIRE(tape.read() == 3);
        REQUIRE(tape.seek_forward() == true);
        REQUIRE(tape.read() == 4);
        REQUIRE(tape.seek_forward() == true);
        REQUIRE(tape.read() == 5);
    }

    SECTION("Read data non-sequentially") {
        REQUIRE(tape.read() == 1);
        REQUIRE(tape.seek_forward() == true);
        REQUIRE(tape.read() == 2);
        REQUIRE(tape.seek_backwards() == true);
        REQUIRE(tape.read() == 1);
        REQUIRE(tape.seek_forward() == true);
        REQUIRE(tape.seek_forward() == true);
        REQUIRE(tape.seek_forward() == true);
        REQUIRE(tape.read() == 4);
        REQUIRE(tape.seek_backwards() == true);
        REQUIRE(tape.seek_backwards() == true);
        REQUIRE(tape.read() == 2);
    }
}

TEST_CASE("Seeking forward and backwards", "[filetape]") {
    tape::FileTape tape("assets/filetape_test_data.txt");

    SECTION("Rewinding at the beginning of a file tape") {
        REQUIRE(tape.seek_backwards() == false);
        REQUIRE(tape.read() == 1);
        REQUIRE(tape.seek_forward() == true);
        REQUIRE(tape.read() == 2);
        REQUIRE(tape.seek_backwards() == true);
        REQUIRE(tape.seek_backwards() == false);
        REQUIRE(tape.read() == 1);
    }

    SECTION("Seeking at the end of a file tape") {
        const int size = 5;
        // seek to end of a file tape
        for (int i = 0; i < size - 1; i++) {
            REQUIRE(tape.seek_forward() == true);
        }
        REQUIRE(tape.seek_forward() == false);
        REQUIRE(tape.read() == 5);
        REQUIRE(tape.seek_backwards() == true);
        REQUIRE(tape.read() == 4);
        REQUIRE(tape.seek_forward() == true);
        REQUIRE(tape.seek_forward() == false);
        REQUIRE(tape.read() == 5);
    }
}

TEST_CASE("Writing to a file tape", "[filetape]") {
    // init a temp file to modify
    // std::string tmp_file_name = "/tmp/"
    // std::unique_ptr<std::FILE> tmp_file(std::tmpfile());
    // std::fstream tmp(tmp_file);
    // std::fstream tmp(tmp_file);
    // tape::FileTape tape("assets/filetape_test_data.txt");
}
// NOLINTEND(readability-function-cognitive-complexity)