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

static uint32_t write_callCnt = 0u;
static char write_data[20];
static uint32_t write_idx;

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

TEST_CASE( "shellmatta_insertChars normal call" ) {

    shellmatta_instance_t inst;
    char buffer[20] = "abcdefghij\0\0\0\0\0\0\0\0\0";

    memset(&inst, 0, sizeof(inst));
    inst.buffer = buffer;
    inst.bufferSize = 20;
    inst.cursor = 8;
    inst.inputCount = 10;
    inst.echoEnabled = true;

    inst.write = writeFct;

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

    utils_insertChars(&inst, (char*)"blksdflsd kfjlk", 4u, false);

    CHECK( inst.cursor == 12);
    CHECK( inst.inputCount == 14);
    CHECK( write_callCnt == 5u );
    CHECK( strncmp("blks\x1b[K\x1b[sij\x1b[u", write_data, 15u) == 0);
    REQUIRE( strncmp("abcdefghblksij\0\0\0\0\0\0\0", buffer, sizeof(buffer)) == 0);
}

TEST_CASE( "shellmatta_insertChars overwrite" ) {

    shellmatta_instance_t inst;
    char buffer[20] = "abcdefghij\0\0\0\0\0\0\0\0\0";

    memset(&inst, 0, sizeof(inst));
    inst.buffer = buffer;
    inst.bufferSize = 20;
    inst.cursor = 8;
    inst.inputCount = 10;
    inst.echoEnabled = true;
    inst.mode = SHELLMATTA_MODE_OVERWRITE;

    inst.write = writeFct;

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

    utils_insertChars(&inst, (char*)"blksdflsd kfjlk", 4u, false);

    CHECK( inst.cursor == 12);
    CHECK( inst.inputCount == 12);
    CHECK( write_callCnt == 1u );
    CHECK( strncmp("blks", write_data, 5u) == 0);
    REQUIRE( strncmp("abcdefghblks\0\0\0\0\0\0\0\0\0", buffer, sizeof(buffer)) == 0);
}

TEST_CASE( "shellmatta_insertChars append" ) {

    shellmatta_instance_t inst;
    char buffer[20] = "abcdefghij\0\0\0\0\0\0\0\0\0";

    memset(&inst, 0, sizeof(inst));
    inst.buffer = buffer;
    inst.bufferSize = 20;
    inst.cursor = 10;
    inst.inputCount = 10;
    inst.echoEnabled = true;
    inst.mode = SHELLMATTA_MODE_INSERT;

    inst.write = writeFct;

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

    utils_insertChars(&inst, (char*)"blksdflsd kfjlk", 4u, false);

    CHECK( inst.cursor == 14);
    CHECK( inst.inputCount == 14);
    CHECK( write_callCnt == 1u );
    CHECK( strncmp("blks", write_data, 5u) == 0);
    REQUIRE( strncmp("abcdefghijblks\0\0\0\0\0\0\0", buffer, sizeof(buffer)) == 0);
}

TEST_CASE( "shellmatta_insertChars 0 length" ) {

    shellmatta_instance_t inst;
    char buffer[20] = "abcdefghij\0\0\0\0\0\0\0\0\0";

    memset(&inst, 0, sizeof(inst));
    inst.buffer = buffer;
    inst.bufferSize = 20;
    inst.cursor = 8;
    inst.inputCount = 10;
    inst.echoEnabled = true;

    inst.write = writeFct;

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

    utils_insertChars(&inst, (char*)"blksdflsd kfjlk", 0u, false);

    CHECK( inst.cursor == 8u );
    CHECK( inst.inputCount == 10u );
    CHECK( write_callCnt == 0u );
    CHECK( memcmp("\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", write_data, sizeof(write_data) ) == 0u );
    REQUIRE( memcmp("abcdefghij\0\0\0\0\0\0\0\0\0", buffer, sizeof(buffer)) == 0);
}

TEST_CASE( "shellmatta_insertChars buffer full" ) {

    shellmatta_instance_t inst;
    char buffer[20] = "abcdefghij\0\0\0\0\0\0\0\0\0";

    memset(&inst, 0, sizeof(inst));
    inst.buffer = buffer;
    inst.bufferSize = 20;
    inst.cursor = 8;
    inst.inputCount = 10;
    inst.echoEnabled = true;

    inst.write = writeFct;

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

    utils_insertChars(&inst, (char*)"blksdflsd kfjlk", 10u, false);

    CHECK( inst.cursor == 18u );
    CHECK( inst.inputCount == 20u );
    CHECK( write_callCnt == 5u );
    CHECK( memcmp("blksdflsd ", write_data, 10u ) == 0u );
    REQUIRE( memcmp("abcdefghblksdflsd ij", buffer, sizeof(buffer)) == 0);
}


TEST_CASE( "shellmatta_insertChars buffer overflow by 1" ) {

    shellmatta_instance_t inst;
    char buffer[20] = "abcdefghij\0\0\0\0\0\0\0\0\0";

    memset(&inst, 0, sizeof(inst));
    inst.buffer = buffer;
    inst.bufferSize = 20;
    inst.cursor = 8;
    inst.inputCount = 10;
    inst.echoEnabled = true;

    inst.write = writeFct;

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

    utils_insertChars(&inst, (char*)"blksdflsd kfjlk", 11u, false);

    CHECK( inst.cursor == 18u );
    CHECK( inst.inputCount == 20u );
    CHECK( write_callCnt == 5u );
    CHECK( memcmp("blksdflsd ", write_data, 10u ) == 0u );
    REQUIRE( memcmp("abcdefghblksdflsd ij", buffer, sizeof(buffer)) == 0);
}