/*
 * Copyright (c) 2021 Stefan Strobel <stefan.strobel@shimatta.net>
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/.
 */

/**
 * @file    test_integration_optLong.cpp
 * @brief   integration test implementation for the history buffer of the shellmatta
 * @author  Stefan Strobel <stefan.strobel@shimatta.net>
 */

#include "test/framework/catch.hpp"
extern "C" {
#include "test/framework/fff.h"
#include "shellmatta.h"
}
#include <string.h>

FAKE_VALUE_FUNC(shellmatta_retCode_t, writeFct, const char *, uint32_t)
FAKE_VALUE_FUNC(shellmatta_retCode_t, cmdFct1, shellmatta_handle_t, const char *, uint32_t)
FAKE_VALUE_FUNC(shellmatta_retCode_t, cmdFct2, shellmatta_handle_t, const char *, uint32_t)
FAKE_VALUE_FUNC(shellmatta_retCode_t, cmdFct3, shellmatta_handle_t, const char *, uint32_t)
FAKE_VALUE_FUNC(shellmatta_retCode_t, cmdFct4, shellmatta_handle_t, const char *, uint32_t)

/* List of fakes */
#define FFF_FAKES_LIST(FAKE)            \
    FAKE(writeFct)                      \
    FAKE(cmdFct1)                       \
    FAKE(cmdFct2)                       \
    FAKE(cmdFct3)                       \
    FAKE(cmdFct4)

#define CHECK_FOR_COMMAND(hist, idx)                                                                                    \
    CHECK(writeFct_fake.call_count == ((hist) + 1u));                                                                   \
    CHECK(0 == memcmp(writeFct_fake.arg0_history[(hist)], commandSequence[(idx)], strlen(commandSequence[(idx)]) - 1)); \
    CHECK((strlen(commandSequence[(idx)]) - 1) == writeFct_fake.arg1_history[(hist)]);

#define UP      "\x1b" "[A"
#define DOWN    "\x1b" "[B"
#define PRESS_BUTTON(button) \
    CHECK(SHELLMATTA_OK == shellmatta_processData(handle, (char*)(button),  3u));

shellmatta_cmd_t cmd1 = {(char*)"cmd1", (char*)"1", NULL, NULL, cmdFct1, NULL};
shellmatta_cmd_t cmd2 = {(char*)"cmd2", (char*)"2", NULL, NULL, cmdFct2, NULL};
shellmatta_cmd_t cmd3 = {(char*)"cmd3", (char*)"3", NULL, NULL, cmdFct3, NULL};
shellmatta_cmd_t cmd4 = {(char*)"cmd4", (char*)"4", NULL, NULL, cmdFct4, NULL};

char *commandSequence[] =
{
    (char*)"foo\r",
    (char*)"bar\r",
    (char*)"cmd1\r",
    (char*)"2\r",
    (char*)"4\r",
    (char*)"cmd3\r"
};

#define CMD_SEQ_LEN (sizeof(commandSequence) / sizeof(commandSequence[0]))

SCENARIO("Test the history buffer with a fixed sequence of commands in there")
{
    GIVEN("An initialized Shellmatte instance with some commands already in the history buffer")
    {
        shellmatta_instance_t inst;
        shellmatta_handle_t handle;
        char buffer[1024u];
        char historyBuffer[1024u];

        CHECK(SHELLMATTA_OK == shellmatta_doInit(   &inst,
                                                    &handle,
                                                    buffer,
                                                    sizeof(buffer),
                                                    historyBuffer,
                                                    sizeof(historyBuffer),
                                                    "shellmatta->",
                                                    NULL,
                                                    writeFct));

        CHECK(SHELLMATTA_OK == shellmatta_addCmd(handle, &cmd1));
        CHECK(SHELLMATTA_OK == shellmatta_addCmd(handle, &cmd2));
        CHECK(SHELLMATTA_OK == shellmatta_addCmd(handle, &cmd3));
        CHECK(SHELLMATTA_OK == shellmatta_addCmd(handle, &cmd4));

        for(uint32_t i = 0u; i < CMD_SEQ_LEN; i++)
        {
            CHECK(SHELLMATTA_OK == shellmatta_processData(handle, commandSequence[i], strlen(commandSequence[i])));
        }

        WHEN("The up button is pressed")
        {
            THEN("The shellmatta prints the most recent command")
            {
                FFF_FAKES_LIST(RESET_FAKE)
                PRESS_BUTTON(UP)

                CHECK(writeFct_fake.call_count == 2);
                CHECK(0 == memcmp(writeFct_fake.arg0_history[0], "\x1b" "[K", 3));
                CHECK(3 == writeFct_fake.arg1_history[0]);
                CHECK(0 == memcmp(writeFct_fake.arg0_history[1], commandSequence[CMD_SEQ_LEN - 1], strlen(commandSequence[CMD_SEQ_LEN - 1]) - 1));
                CHECK((strlen(commandSequence[CMD_SEQ_LEN - 1]) - 1) == writeFct_fake.arg1_history[1]);

                for(uint32_t i = CMD_SEQ_LEN - 1; i > 0; i--)
                {
                    FFF_FAKES_LIST(RESET_FAKE)
                    PRESS_BUTTON(UP)

                    CHECK(writeFct_fake.call_count == 3);

                    CHECK(0 == memcmp(writeFct_fake.arg0_history[1], "\x1b" "[K", 3));
                    CHECK(3 == writeFct_fake.arg1_history[1]);

                    CHECK(0 == memcmp(writeFct_fake.arg0_history[2], commandSequence[i - 1u], strlen(commandSequence[i - 1u]) - 1));
                    CHECK((strlen(commandSequence[i - 1u]) - 1) == writeFct_fake.arg1_history[2]);
                }
            }
        }

        WHEN("The history buffer it at the oldest command yet")
        {
            for(uint32_t i = CMD_SEQ_LEN; i > 0; i--)
            {
                PRESS_BUTTON(UP)
            }

            AND_WHEN("The up button is pressed again")
            {
                THEN("The output is deleted and the oldest command is printed again")
                {
                    for(uint32_t i = 0u; i < 64; i++)
                    {
                        FFF_FAKES_LIST(RESET_FAKE)
                        PRESS_BUTTON(UP)
                        CHECK_FOR_COMMAND(2u, 0u)
                    }
                }
            }

            AND_WHEN("The down button is pressed")
            {
                THEN("On each button press one newer command is printed")
                {
                    for(uint32_t i = 1; i < CMD_SEQ_LEN; i++)
                    {
                        FFF_FAKES_LIST(RESET_FAKE)
                        PRESS_BUTTON(DOWN)
                        CHECK(0 == memcmp(writeFct_fake.arg0_history[1], "\x1b" "[K", 3));
                        CHECK(3 == writeFct_fake.arg1_history[1]);
                        CHECK_FOR_COMMAND(2u, i)
                    }
                }
            }
        }

        WHEN("The user pushes the up and down button alternatingly")
        {
            THEN("The output shall be updated with the correct command or not updated at all when at the end")
            {
                FFF_FAKES_LIST(RESET_FAKE)
                PRESS_BUTTON(UP)
                CHECK_FOR_COMMAND(1u, CMD_SEQ_LEN - 1u)

                FFF_FAKES_LIST(RESET_FAKE)
                PRESS_BUTTON(UP)
                CHECK_FOR_COMMAND(2u, CMD_SEQ_LEN - 2u)

                FFF_FAKES_LIST(RESET_FAKE)
                PRESS_BUTTON(DOWN)
                CHECK_FOR_COMMAND(2u, CMD_SEQ_LEN - 1u)

                FFF_FAKES_LIST(RESET_FAKE)
                PRESS_BUTTON(DOWN)
                CHECK(writeFct_fake.call_count == 0u);

                FFF_FAKES_LIST(RESET_FAKE)
                PRESS_BUTTON(DOWN)
                CHECK(writeFct_fake.call_count == 0u);

                FFF_FAKES_LIST(RESET_FAKE)
                PRESS_BUTTON(UP)
                CHECK_FOR_COMMAND(2u, CMD_SEQ_LEN - 2u)

                FFF_FAKES_LIST(RESET_FAKE)
                PRESS_BUTTON(UP)
                CHECK_FOR_COMMAND(2u, CMD_SEQ_LEN - 3u)

                FFF_FAKES_LIST(RESET_FAKE)
                PRESS_BUTTON(UP)
                CHECK_FOR_COMMAND(2u, CMD_SEQ_LEN - 4u)

                FFF_FAKES_LIST(RESET_FAKE)
                PRESS_BUTTON(UP)
                CHECK_FOR_COMMAND(2u, CMD_SEQ_LEN - 5u)

                FFF_FAKES_LIST(RESET_FAKE)
                PRESS_BUTTON(UP)
                CHECK_FOR_COMMAND(2u, CMD_SEQ_LEN - 6u)

                FFF_FAKES_LIST(RESET_FAKE)
                PRESS_BUTTON(UP)
                CHECK_FOR_COMMAND(2u, CMD_SEQ_LEN - 6u)

                /* back down again */
                FFF_FAKES_LIST(RESET_FAKE)
                PRESS_BUTTON(DOWN)
                CHECK_FOR_COMMAND(2u, CMD_SEQ_LEN - 5u)

                FFF_FAKES_LIST(RESET_FAKE)
                PRESS_BUTTON(DOWN)
                CHECK_FOR_COMMAND(2u, CMD_SEQ_LEN - 4u)

                FFF_FAKES_LIST(RESET_FAKE)
                PRESS_BUTTON(DOWN)
                CHECK_FOR_COMMAND(2u, CMD_SEQ_LEN - 3u)

                FFF_FAKES_LIST(RESET_FAKE)
                PRESS_BUTTON(DOWN)
                CHECK_FOR_COMMAND(2u, CMD_SEQ_LEN - 2u)

                FFF_FAKES_LIST(RESET_FAKE)
                PRESS_BUTTON(DOWN)
                CHECK_FOR_COMMAND(2u, CMD_SEQ_LEN - 1u)

                /* end of the buffer - shellmatta shall not update */
                FFF_FAKES_LIST(RESET_FAKE)
                PRESS_BUTTON(DOWN)
                CHECK(writeFct_fake.call_count == 0u);

                FFF_FAKES_LIST(RESET_FAKE)
                PRESS_BUTTON(DOWN)
                CHECK(writeFct_fake.call_count == 0u);

                /* up once mothe history buffer with a fixed sequence of commands in therere */
                FFF_FAKES_LIST(RESET_FAKE)
                PRESS_BUTTON(UP)
                CHECK_FOR_COMMAND(2u, CMD_SEQ_LEN - 2u)
            }
        }
    }
}

SCENARIO("Test how the history buffer handles more commands than fits inside the buffer")
{
    GIVEN("An initialized Shellmatte instance with some commands already in the history buffer")
    {
        shellmatta_instance_t inst;
        shellmatta_handle_t handle;
        char buffer[1024u];
        char historyBuffer[16u];

        CHECK(SHELLMATTA_OK == shellmatta_doInit(   &inst,
                                                    &handle,
                                                    buffer,
                                                    sizeof(buffer),
                                                    historyBuffer,
                                                    sizeof(historyBuffer),
                                                    "shellmatta->",
                                                    NULL,
                                                    writeFct));

        CHECK(SHELLMATTA_OK == shellmatta_addCmd(handle, &cmd1));
        CHECK(SHELLMATTA_OK == shellmatta_addCmd(handle, &cmd2));
        CHECK(SHELLMATTA_OK == shellmatta_addCmd(handle, &cmd3));
        CHECK(SHELLMATTA_OK == shellmatta_addCmd(handle, &cmd4));

        for(uint32_t i = 0u; i < CMD_SEQ_LEN; i++)
        {
            CHECK(SHELLMATTA_OK == shellmatta_processData(handle, commandSequence[i], strlen(commandSequence[i])));
        }

        WHEN("The user pushes the up and down button alternatingly")
        {
            THEN("The output shall be updated with the correct commands that did fit into the buffer")
            {
                FFF_FAKES_LIST(RESET_FAKE)
                PRESS_BUTTON(UP)
                CHECK_FOR_COMMAND(1u, CMD_SEQ_LEN - 1u)

                FFF_FAKES_LIST(RESET_FAKE)
                PRESS_BUTTON(UP)
                CHECK_FOR_COMMAND(2u, CMD_SEQ_LEN - 2u)

                // FFF_FAKES_LIST(RESET_FAKE)
                // PRESS_BUTTON(DOWN)
                // CHECK_FOR_COMMAND(2u, CMD_SEQ_LEN - 1u)

                // FFF_FAKES_LIST(RESET_FAKE)
                // PRESS_BUTTON(DOWN)
                // CHECK(writeFct_fake.call_count == 0u);

                // FFF_FAKES_LIST(RESET_FAKE)
                // PRESS_BUTTON(DOWN)
                // CHECK(writeFct_fake.call_count == 0u);

                // FFF_FAKES_LIST(RESET_FAKE)
                // PRESS_BUTTON(UP)
                // CHECK_FOR_COMMAND(2u, CMD_SEQ_LEN - 2u)

                // FFF_FAKES_LIST(RESET_FAKE)
                // PRESS_BUTTON(UP)
                // CHECK_FOR_COMMAND(2u, CMD_SEQ_LEN - 3u)

                // FFF_FAKES_LIST(RESET_FAKE)
                // PRESS_BUTTON(UP)
                // CHECK_FOR_COMMAND(2u, CMD_SEQ_LEN - 4u)

                // FFF_FAKES_LIST(RESET_FAKE)
                // PRESS_BUTTON(UP)
                // CHECK_FOR_COMMAND(2u, CMD_SEQ_LEN - 4u)

                // /* back down again */
                // FFF_FAKES_LIST(RESET_FAKE)
                // PRESS_BUTTON(DOWN)
                // CHECK_FOR_COMMAND(2u, CMD_SEQ_LEN - 3u)

                // FFF_FAKES_LIST(RESET_FAKE)
                // PRESS_BUTTON(DOWN)
                // CHECK_FOR_COMMAND(2u, CMD_SEQ_LEN - 2u)

                // FFF_FAKES_LIST(RESET_FAKE)
                // PRESS_BUTTON(DOWN)
                // CHECK_FOR_COMMAND(2u, CMD_SEQ_LEN - 1u)

                // /* end of the buffer - shellmatta shall not update */
                // FFF_FAKES_LIST(RESET_FAKE)
                // PRESS_BUTTON(DOWN)
                // CHECK(writeFct_fake.call_count == 0u);

                // FFF_FAKES_LIST(RESET_FAKE)
                // PRESS_BUTTON(DOWN)
                // CHECK(writeFct_fake.call_count == 0u);

                // /* up once mothe history buffer with a fixed sequence of commands in therere */
                // FFF_FAKES_LIST(RESET_FAKE)
                // PRESS_BUTTON(UP)
                // CHECK_FOR_COMMAND(2u, CMD_SEQ_LEN - 2u)
            }
        }
    }
}