//
// Copyright (C) 2021-2024 Advanced Micro Devices, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//

#pragma once

#include "rocsparseio.h"
#include <iostream>
#include <stdio.h>
#include <string.h>
//!
//!   @brief Class to define a command line.
//!
struct rocsparseio_cmdline_t
{

public:
    //!
    //! @brief Define the command line
    //! @param argc_ nb arguments
    //! @param argv_ array of arguments
    //!
    rocsparseio_cmdline_t(int argc_, char** argv_);

    //!
    //! @brief Free the rocsparseio_cmdline_t object
    //!
    ~rocsparseio_cmdline_t();

    //!
    //! @brief Display the command line.
    //!
    void disp() const;

    //!
    //! @brief Display the command line
    //! @param out_ the file descriptor.
    //!
    void disp_header(FILE* out_) const;

    //!
    //! @brief Get a logical option
    //! @param opt_ name of the option
    //! @return false if not found, true otherwise
    //!
    bool get_logical(const char* opt_);

    //!
    //! @brief Get a string option
    //! @param opt_ name of the option
    //! @param v_ value of the option
    //! @return false if not found, true otherwise
    //!
    bool get_string(const char* opt_, char* v_);

    bool option(const char* opt_);

    template <typename T>
    bool option(const char* opt_, T* v_);

    //!
    //! @brief Get a real option
    //! @param opt_ name of the option
    //! @param v_ value of the option
    //! @return false if not found, true otherwise
    //!
    template <typename real_t>
    bool get_real(const char* opt_, real_t* v_);

    //!
    //! @brief Get an integer option
    //! @param opt_ name of the option
    //! @param v_ value of the option
    //! @return false if not found, true otherwise
    //!
    template <typename int_t>
    bool get_integer(const char* opt_, int_t* v_);

    //!
    //! @brief Get the ith argument of the command line
    //! @param ith_  ith argument
    //! @return the ith argument
    //!
    const char* get_arg(const int ith_) const;

    //!
    //! @brief Get the number of arguments.
    //! @return The number of arguments.
    //!
    inline int get_nargs() const;

    //!
    //! @brief Check invalid argument
    //! @return 1 if an invalid argument is found, 0 otherwise
    //!
    bool check_invalid() const;

    //!
    //! @brief Is empty ?
    //! @return false if not empty, true otherwise
    //!
    bool isempty() const;

    template <typename T>
    static void scan(const char* opt_, T* v_);

private:
    static constexpr int MAXLEN = 256;
    static constexpr int MAXARG = 128;

    int    argc{}; //!< number of arguments in command line
    char   argv[MAXARG][MAXLEN]; //!< arguments in command line
    int    ref_argc{}; //!< reference number of argument in command line
    char** ref_argv{}; //!< reference arguments in command line

    int search(int          argc_,
               char         argv_[rocsparseio_cmdline_t::MAXARG][rocsparseio_cmdline_t::MAXLEN],
               const char*  opt_,
               const int    nchoice_    = 0,
               const char** opt_choice_ = NULL);
};

//!
//! @brief Get the number of arguments.
//! @return The number of arguments.
//!
inline int rocsparseio_cmdline_t::get_nargs() const
{
    return this->argc;
}

//!
//!   @brief Class to define a command line.
//!
int rocsparseio_cmdline_t::search(
    int          argc_,
    char         argv_[rocsparseio_cmdline_t::MAXARG][rocsparseio_cmdline_t::MAXLEN],
    const char*  opt_,
    const int    nchoice_,
    const char** opt_choice_)
{
    int j, i = (int)0;
    for(i = 1; i < argc_; i++)
    {
        if(!strcmp(argv_[i], opt_))
        {
            break;
        }
    }
    if(i < argc_)
    {
        if((nchoice_ > 0) && (i + 1 < argc_))
        {
            ++i;
            for(j = 0; j < nchoice_; ++j)
            {
                if(!strcmp(argv_[i], opt_choice_[j]))
                {
                    break;
                }
            }
            if(j < nchoice_)
            {
                return i - 1;
            }
            else
            {
                return (int)-1;
            }
        }
        else
        {
            return i;
        }
    }
    else
    {
        return (int)-1;
    }
};

void rocsparseio_cmdline_t::disp_header(FILE* out_) const
{

    fprintf(out_, "// date    : %s\n", __DATE__);
    fprintf(out_, "// command :");
    for(int i = 0; i < this->argc; ++i)
    {
        fprintf(out_, " %s", this->argv[i]);
    }
    fprintf(out_, "\n");
};

void rocsparseio_cmdline_t::disp() const
{

    for(int i = 0; i < this->argc; ++i)
    {
        fprintf(stdout, "[%d] %s\n", i, this->argv[i]);
    }
};

rocsparseio_cmdline_t::~rocsparseio_cmdline_t(){};

rocsparseio_cmdline_t::rocsparseio_cmdline_t(int argc_, char** argv_)
{
    if(argc_ < rocsparseio_cmdline_t::MAXARG)
    {
        this->ref_argc = argc_;
        this->ref_argv = argv_;
        this->argc     = argc_;
        for(int i = 0; i < argc_; ++i)
        {
            strncpy(this->argv[i], argv_[i], (size_t)rocsparseio_cmdline_t::MAXLEN);
        }
    }
    else
    {
        std::cerr << "number of command line arguments exceeds limits." << std::endl;
        exit(1);
    }
};

bool rocsparseio_cmdline_t::get_logical(const char* opt_)
{
    int k = rocsparseio_cmdline_t::search(this->argc, this->argv, opt_);

    if((k >= 0) && (k < this->argc))
    {
        if(k + 1 < this->argc)
        {
            {
                int i;
                for(i = 0; i < this->argc - k; ++i)
                {
                    strncpy(this->argv[k + i],
                            this->argv[k + 1 + i],
                            (size_t)rocsparseio_cmdline_t::MAXLEN);
                }
            }
        }
        this->argc -= 1;
        return true;
    }
    return false;
};

bool rocsparseio_cmdline_t::option(const char* opt_)
{
    int k = rocsparseio_cmdline_t::search(this->argc, this->argv, opt_);

    if((k >= 0) && (k < this->argc))
    {
        if(k + 1 < this->argc)
        {
            {
                int i;
                for(i = 0; i < this->argc - k; ++i)
                {
                    strncpy(this->argv[k + i],
                            this->argv[k + 1 + i],
                            (size_t)rocsparseio_cmdline_t::MAXLEN);
                }
            }
        }
        this->argc -= 1;
        return true;
    }
    return false;
};

bool rocsparseio_cmdline_t::get_string(const char* opt_, char* t_)
{
    int j, k = rocsparseio_cmdline_t::search(this->argc, this->argv, opt_);
    if((k >= 0) && (++k < this->argc))
    {
        j = k - 1;
        strncpy(t_, this->argv[k], (size_t)rocsparseio_cmdline_t::MAXLEN);
        {
            int i;
            for(i = 0; i < this->argc - k; ++i)
            {
                strncpy(this->argv[j + i],
                        this->argv[k + 1 + i],
                        (size_t)rocsparseio_cmdline_t::MAXLEN);
            }
        }
        this->argc -= 2;
        return true;
    }
    return false;
};

template <typename int_t>
bool rocsparseio_cmdline_t::get_integer(const char* opt_, int_t* x_)
{
    int j, k = rocsparseio_cmdline_t::search(this->argc, this->argv, opt_);
    if((k >= 0) && (++k < this->argc))
    {
        j = k - 1;
        sscanf(this->argv[k], "%d", x_);
        {
            int i;
            for(i = 0; i < this->argc - k; ++i)
            {
                strncpy(this->argv[j + i],
                        this->argv[k + 1 + i],
                        (size_t)rocsparseio_cmdline_t::MAXLEN);
            }
        }
        this->argc -= 2;
        return true;
    }
    return false;
};

template <>
bool rocsparseio_cmdline_t::get_integer<long long int>(const char* opt_, long long int* x_)
{
    int j, k = rocsparseio_cmdline_t::search(this->argc, this->argv, opt_);
    if((k >= 0) && (++k < this->argc))
    {
        j = k - 1;
        sscanf(this->argv[k], "%lld", x_);
        {
            int i;
            for(i = 0; i < this->argc - k; ++i)
            {
                strncpy(this->argv[j + i],
                        this->argv[k + 1 + i],
                        (size_t)rocsparseio_cmdline_t::MAXLEN);
            }
        }
        this->argc -= 2;
        return true;
    }
    return false;
};

template <>
void rocsparseio_cmdline_t::scan(const char* opt_, float* v_)
{
    sscanf(opt_, "%e", v_);
}

template <>
void rocsparseio_cmdline_t::scan(const char* opt_, int* v_)
{
    sscanf(opt_, "%d", v_);
}

template <>
void rocsparseio_cmdline_t::scan(const char* opt_, long int* v_)
{
    sscanf(opt_, "%ld", v_);
}

template <>
void rocsparseio_cmdline_t::scan(const char* opt_, long long int* v_)
{
    sscanf(opt_, "%lld", v_);
}

template <>
void rocsparseio_cmdline_t::scan(const char* opt_, char* v_)
{
    sscanf(opt_, "%s", v_);
}

template <typename T>
bool rocsparseio_cmdline_t::option(const char* opt_, T* v_)
{
    int j, k = rocsparseio_cmdline_t::search(this->argc, this->argv, opt_);
    if((k >= 0) && (++k < this->argc))
    {
        j = k - 1;
        rocsparseio_cmdline_t::scan(this->argv[k], v_);
        for(int i = 0; i < this->argc - k; ++i)
        {
            strncpy(
                this->argv[j + i], this->argv[k + 1 + i], size_t(rocsparseio_cmdline_t::MAXLEN));
        }
        this->argc -= 2;
        return true;
    }
    return false;
}

template <typename real_t>
bool rocsparseio_cmdline_t::get_real(const char* opt_, real_t* x_)
{
    int j, k = rocsparseio_cmdline_t::search(this->argc, this->argv, opt_);
    if((k >= 0) && (++k < this->argc))
    {
        j = k - 1;
        sscanf(this->argv[k], "%le", x_);
        {
            int i;
            for(i = 0; i < this->argc - k; ++i)
            {
                strncpy(this->argv[j + i],
                        this->argv[k + 1 + i],
                        size_t(rocsparseio_cmdline_t::MAXLEN));
            }
        }
        this->argc -= 2;
        return true;
    }
    return false;
};

template <>
bool rocsparseio_cmdline_t::get_real<double>(const char* opt_, double* x_)
{
    int j, k = rocsparseio_cmdline_t::search(this->argc, this->argv, opt_);
    if((k >= 0) && (++k < this->argc))
    {
        j = k - 1;
        sscanf(this->argv[k], "%le", x_);
        {
            int i;
            for(i = 0; i < this->argc - k; ++i)
            {
                strncpy(this->argv[j + i],
                        this->argv[k + 1 + i],
                        size_t(rocsparseio_cmdline_t::MAXLEN));
            }
        }
        this->argc -= 2;
        return true;
    }
    return false;
};

bool rocsparseio_cmdline_t::check_invalid() const
{
    int i, j = 0;
    for(i = 2; i < this->argc; ++i)
    {
        if(this->argv[i][0] == '-')
        {
            j = 1;
        }
    }
    return j > 0;
};

bool rocsparseio_cmdline_t::isempty() const
{
    return (1 == this->argc);
};

const char* rocsparseio_cmdline_t::get_arg(const int i_) const
{
    return (i_ < this->argc) ? (this->argv[i_]) : nullptr;
};