/*
 * Copyright (c) 2021 - 2024 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_help.cpp
 * @brief   integration test implementation for the help command 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)

static char fakeWriteData[1024];
static uint32_t fakeWriteLength;
static shellmatta_retCode_t writeFct_customFake(const char* data, uint32_t length)
{
    while((length > 0) && (fakeWriteLength < sizeof(fakeWriteData)))
    {
        fakeWriteData[fakeWriteLength] = *data;
        data ++;
        length --;
        fakeWriteLength ++;
    }

    return SHELLMATTA_OK;
}

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

#define PROCESS_INPUT(input) \
    CHECK(SHELLMATTA_OK == shellmatta_processData(handle, (char*)(input), sizeof((input)) - 1u));

static shellmatta_cmd_t cmd1 = {(char*)"cmd1", (char*)"1", (char*)"cmd1 [options]", (char*)"cmd1 usage\r\n--option, -o: option", cmdFct1, NULL};
static shellmatta_cmd_t cmd2 = {(char*)"cmd2", NULL, NULL, NULL, cmdFct2, NULL};
static shellmatta_cmd_t cmd3 = {(char*)"cmd3", (char*)"", (char*)"", (char*)"", cmdFct3, NULL};

SCENARIO("Test the help function")
{
    GIVEN("An initialized and empty Shellmatta instance")
    {
        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));

        WHEN("The user hits help")
        {
            FFF_FAKES_LIST(RESET_FAKE)
            fakeWriteLength = 0u;
            memset(fakeWriteData, 0, sizeof(fakeWriteData));

            shellmatta_write_t writeCustomFakeSeq[1] = {writeFct_customFake};
            SET_CUSTOM_FAKE_SEQ(writeFct, writeCustomFakeSeq, 1)

            PROCESS_INPUT("help\r\n")

            THEN("The shellmatta prints the help text")
            {
                static const char * response = (char*)  "help\r\n"
                                                        "cmd1  1  cmd1 [options]\r\n"
                                                        "cmd2\r\n"
                                                        "cmd3\r\n"
                                                        "help  ?  help [command] - print help or usage information\r\n\r\n"
                                                        "shellmatta->";
                CHECK(writeFct_fake.call_count == 23);
                CHECK(strlen(response) == fakeWriteLength);
                CHECK_THAT(response, Catch::Matchers::Equals(fakeWriteData));
            }
        }

        WHEN("The user hits ?")
        {
            FFF_FAKES_LIST(RESET_FAKE)
            fakeWriteLength = 0u;
            memset(fakeWriteData, 0, sizeof(fakeWriteData));

            shellmatta_write_t writeCustomFakeSeq[1] = {writeFct_customFake};
            SET_CUSTOM_FAKE_SEQ(writeFct, writeCustomFakeSeq, 1)

            PROCESS_INPUT("?\r\n")

            THEN("The shellmatta prints the help text")
            {
                static const char * response = (char*) "?\r\n"
                                                        "cmd1  1  cmd1 [options]\r\n"
                                                        "cmd2\r\n"
                                                        "cmd3\r\n"
                                                        "help  ?  help [command] - print help or usage information\r\n\r\n"
                                                        "shellmatta->";
                CHECK(writeFct_fake.call_count == 20);
                CHECK(strlen(response) == fakeWriteLength);
                CHECK_THAT(response, Catch::Matchers::Equals(fakeWriteData));
            }
        }
    }
}

SCENARIO("Test if the help command prints the usage correctly")
{
    GIVEN("An initialized and empty Shellmatta instance")
    {
        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));

        WHEN("The user requests usage information from a valid command")
        {
            FFF_FAKES_LIST(RESET_FAKE)
            fakeWriteLength = 0u;
            memset(fakeWriteData, 0, sizeof(fakeWriteData));

            shellmatta_write_t writeCustomFakeSeq[1] = {writeFct_customFake};
            SET_CUSTOM_FAKE_SEQ(writeFct, writeCustomFakeSeq, 1)

            PROCESS_INPUT("help cmd1\r\n")

            THEN("The shellmatta prints the help text")
            {
                static const char * response = (char*)  "help cmd1\r\n"
                                                        "Help for command: cmd1 (1)\r\n\r\n"
                                                        "cmd1 [options]\r\n\r\n"
                                                        "Usage: \r\n"
                                                        "cmd1 usage\r\n--option, -o: option\r\n"
                                                        "\r\nshellmatta->";
                CHECK(writeFct_fake.call_count == 22);
                CHECK(strlen(response) == fakeWriteLength);
                CHECK_THAT(response, Catch::Matchers::Equals(fakeWriteData));
            }
        }

        WHEN("The user requests usage information from a valid command using its alias")
        {
            FFF_FAKES_LIST(RESET_FAKE)
            fakeWriteLength = 0u;
            memset(fakeWriteData, 0, sizeof(fakeWriteData));

            shellmatta_write_t writeCustomFakeSeq[1] = {writeFct_customFake};
            SET_CUSTOM_FAKE_SEQ(writeFct, writeCustomFakeSeq, 1)

            PROCESS_INPUT("help 1\r\n")

            THEN("The shellmatta prints the help text")
            {
                static const char * response = (char*)  "help 1\r\n"
                                                        "Help for command: cmd1 (1)\r\n\r\n"
                                                        "cmd1 [options]\r\n\r\n"
                                                        "Usage: \r\n"
                                                        "cmd1 usage\r\n--option, -o: option\r\n"
                                                        "\r\nshellmatta->";
                CHECK(writeFct_fake.call_count == 19);
                CHECK(strlen(response) == fakeWriteLength);
                CHECK_THAT(response, Catch::Matchers::Equals(fakeWriteData));
            }
        }

        WHEN("The user requests usage information from an empty command")
        {
            FFF_FAKES_LIST(RESET_FAKE)
            fakeWriteLength = 0u;
            memset(fakeWriteData, 0, sizeof(fakeWriteData));

            shellmatta_write_t writeCustomFakeSeq[1] = {writeFct_customFake};
            SET_CUSTOM_FAKE_SEQ(writeFct, writeCustomFakeSeq, 1)

            PROCESS_INPUT("help cmd2\r\n")

            THEN("The shellmatta prints the help text - without alias, help and usage text")
            {
                static const char * response = (char*)  "help cmd2\r\n"
                                                        "Help for command: cmd2\r\n"
                                                        "\r\nshellmatta->";
                CHECK(writeFct_fake.call_count == 15);
                CHECK(strlen(response) == fakeWriteLength);
                CHECK_THAT(response, Catch::Matchers::Equals(fakeWriteData));
            }
        }


        WHEN("The user requests usage information from an empty stringed command")
        {
            FFF_FAKES_LIST(RESET_FAKE)
            fakeWriteLength = 0u;
            memset(fakeWriteData, 0, sizeof(fakeWriteData));

            shellmatta_write_t writeCustomFakeSeq[1] = {writeFct_customFake};
            SET_CUSTOM_FAKE_SEQ(writeFct, writeCustomFakeSeq, 1)

            PROCESS_INPUT("help cmd3\r\n")

            THEN("The shellmatta prints the help text - without alias, help and usage text")
            {
                static const char * response = (char*)  "help cmd3\r\n"
                                                        "Help for command: cmd3\r\n"
                                                        "\r\nshellmatta->";
                CHECK(writeFct_fake.call_count == 15);
                CHECK(strlen(response) == fakeWriteLength);
                CHECK_THAT(response, Catch::Matchers::Equals(fakeWriteData));
            }
        }

        WHEN("The user adds additional arguments to the help command")
        {
            FFF_FAKES_LIST(RESET_FAKE)
            fakeWriteLength = 0u;
            memset(fakeWriteData, 0, sizeof(fakeWriteData));

            shellmatta_write_t writeCustomFakeSeq[1] = {writeFct_customFake};
            SET_CUSTOM_FAKE_SEQ(writeFct, writeCustomFakeSeq, 1)

            PROCESS_INPUT("help cmd2 foo bar meow this is nonsense\r\n")

            THEN("The shellmatta ignores the superflous arguments")
            {
                static const char * response = (char*)  "help cmd2 foo bar meow this is nonsense\r\n"
                                                        "Help for command: cmd2\r\n"
                                                        "\r\nshellmatta->";
                CHECK(writeFct_fake.call_count == 45);
                CHECK(strlen(response) == fakeWriteLength);
                CHECK_THAT(response, Catch::Matchers::Equals(fakeWriteData));
            }
        }

        WHEN("The user requests help of a nonexisting command")
        {
            FFF_FAKES_LIST(RESET_FAKE)
            fakeWriteLength = 0u;
            memset(fakeWriteData, 0, sizeof(fakeWriteData));

            shellmatta_write_t writeCustomFakeSeq[1] = {writeFct_customFake};
            SET_CUSTOM_FAKE_SEQ(writeFct, writeCustomFakeSeq, 1)

            PROCESS_INPUT("help cmd4\r\n")

            THEN("The shellmatta prints the help list")
            {
                static const char * response = (char*)  "help cmd4\r\n"
                                                        "cmd1  1  cmd1 [options]\r\n"
                                                        "cmd2\r\n"
                                                        "cmd3\r\n"
                                                        "help  ?  help [command] - print help or usage information\r\n\r\n"
                                                        "shellmatta->";
                CHECK(writeFct_fake.call_count == 28);
                CHECK(strlen(response) == fakeWriteLength);
                CHECK_THAT(response, Catch::Matchers::Equals(fakeWriteData));
            }
        }
    }
}