#include "../../src/ErrorSimulator.hpp"
#include "../Tests.hpp"
#include "core/io/FileReader.hpp"

static constexpr const char* TEST_FILE = "../test/modules/resources/test";

static void testReadChar() {
    Core::FileReader r;
    CORE_TEST_ERROR(r.open(TEST_FILE));
    Core::String8<128> s;
    while(true) {
        int c = 0;
        if(r.readChar(c) != Core::Error::NONE) {
            break;
        }
        CORE_TEST_ERROR(s.append(static_cast<c32>(c)));
    }
    CORE_TEST_STRING("abc\nBaum\n", s);
}

static void testReadCharPath() {
    Core::FileReader r;
    Core::Path path;
    CORE_TEST_ERROR(path.append(TEST_FILE));
    CORE_TEST_ERROR(r.open(path));
    Core::String8<128> s;
    while(true) {
        int c = 0;
        if(r.readChar(c) != Core::Error::NONE) {
            break;
        }
        CORE_TEST_ERROR(s.append(static_cast<c32>(c)));
    }
    CORE_TEST_STRING("abc\nBaum\n", s);
}

static void testReadChars() {
    Core::FileReader r;
    CORE_TEST_ERROR(r.open(TEST_FILE));
    char buffer[128];
    CORE_TEST_EQUAL(Core::Error::END_OF_FILE,
                    r.readChars(buffer, sizeof(buffer)));
    CORE_TEST_STRING("abc\nBaum\n", buffer);
}

static void testReadCharsOverflow() {
    Core::FileReader r;
    CORE_TEST_ERROR(r.open(TEST_FILE));
    char buffer[6];
    CORE_TEST_ERROR(r.readChars(buffer, sizeof(buffer)));
    CORE_TEST_STRING("abc\nB", buffer);
}

static void testMoveConstruct() {
    Core::FileReader r;
    CORE_TEST_ERROR(r.open(TEST_FILE));
    Core::FileReader r2 = Core::move(r);
    CORE_TEST_STRING("", r.getPath());
    CORE_TEST_STRING(TEST_FILE, r2.getPath());

    int c = 0;
    CORE_TEST_EQUAL(Core::Error::INVALID_STATE, r.readChar(c));
    CORE_TEST_ERROR(r2.readChar(c));
    CORE_TEST_EQUAL('a', c);
}

static void testMoveAssignment() {
    Core::FileReader r;
    CORE_TEST_ERROR(r.open(TEST_FILE));
    Core::FileReader r2;
    r2 = Core::move(r);
    CORE_TEST_STRING("", r.getPath());
    CORE_TEST_STRING(TEST_FILE, r2.getPath());

    int c = 0;
    CORE_TEST_EQUAL(Core::Error::INVALID_STATE, r.readChar(c));
    CORE_TEST_ERROR(r2.readChar(c));
    CORE_TEST_EQUAL('a', c);
}

static void testInvalidAccess() {
    char buffer[4];
    Core::FileReader r;
    CORE_TEST_EQUAL(Core::Error::INVALID_STATE,
                    r.readChars(buffer, sizeof(buffer)));
    CORE_TEST_ERROR(r.open(TEST_FILE));
    CORE_TEST_EQUAL(Core::Error::INVALID_ARGUMENT, r.readChars(buffer, -1));
    CORE_TEST_EQUAL(Core::Error::INVALID_STATE, r.open(TEST_FILE));
}

static void testInvalidAccessPath() {
    Core::FileReader r;
    Core::Path path;
    CORE_TEST_ERROR(path.append(TEST_FILE));
    CORE_TEST_ERROR(r.open(path));
    CORE_TEST_EQUAL(Core::Error::INVALID_STATE, r.open(path));
}

static void testCloseFail() {
#ifdef ERROR_SIMULATOR
    Core::Fail::fileClose = true;
    {
        Core::FileReader r;
        CORE_TEST_ERROR(r.open(TEST_FILE));
    }
    Core::Fail::fileClose = false;
#endif
}

void Core::testFileReader() {
    testReadChar();
    testReadCharPath();
    testReadChars();
    testReadCharsOverflow();
    testMoveConstruct();
    testMoveAssignment();
    testInvalidAccess();
    testInvalidAccessPath();
    testCloseFail();
}