#include "test/framework/catch.hpp"
#include "src/shellmatta_utils.c"
#include <string.h>

static uint32_t write_callCnt = 0u;
static char write_data[10];
static uint32_t write_length;

static shellmatta_retCode_t writeFct(const char* data, uint32_t length)
{
    write_callCnt ++;
    strncpy(write_data, data, length);
    write_length = length;
    return SHELLMATTA_OK;
}


TEST_CASE( "shellmatta_utils_rewindCursor normal" ) {

    shellmatta_instance_t inst;
    char buffer[20];

    inst.buffer = buffer;
    inst.bufferSize = 20;
    inst.cursor = 10;
    inst.inputCount = 10;
    inst.echoEnabled = true;

    inst.write = writeFct;

    write_callCnt = 0u;
    memset(write_data, 0, sizeof(write_data));
    write_length = 0u;

    utils_rewindCursor(&inst, 5u);

    CHECK( write_callCnt == 1u);
    CHECK( write_length == 4u);
    REQUIRE( strncmp("\e[5D", write_data, 4u) == 0);
}


TEST_CASE( "shellmatta_utils_rewindCursor rewind by 12 with cursor at 10" ) {

    shellmatta_instance_t inst;
    char buffer[20];

    inst.buffer = buffer;
    inst.bufferSize = 20;
    inst.cursor = 10;
    inst.inputCount = 10;
    inst.echoEnabled = true;

    inst.write = writeFct;

    write_callCnt = 0u;
    memset(write_data, 0, sizeof(write_data));
    write_length = 0u;

    utils_rewindCursor(&inst, 12u);

    CHECK( write_callCnt == 1u);
    CHECK( write_length == 5u);
    REQUIRE( strncmp("\e[10D", write_data, 5u) == 0);
}

TEST_CASE( "shellmatta_utils_rewindCursor rewind by 0" ) {

    shellmatta_instance_t inst;
    char buffer[20];

    inst.buffer = buffer;
    inst.bufferSize = 20;
    inst.cursor = 10;
    inst.inputCount = 10;
    inst.echoEnabled = true;

    inst.write = writeFct;

    write_callCnt = 0u;
    memset(write_data, 0, sizeof(write_data));
    write_length = 0u;

    utils_rewindCursor(&inst, 0u);

    CHECK( write_callCnt == 0u);
    CHECK( write_length == 0u);
    REQUIRE( strncmp("\0\0\0\0\0", write_data, 4u) == 0);
}