// Copyright(c) 2015-2017 YamaArashi
//
// 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.

#include <cstdio>
#include <cstdlib>
#include <stack>
#include <set>
#include <string>
#include "scaninc.h"
#include "asm_file.h"
#include "c_file.h"

bool CanOpenFile(std::string path)
{
    FILE *fp = fopen(path.c_str(), "rb");

    if (fp == NULL)
        return false;

    fclose(fp);
    return true;
}

int main(int argc, char **argv)
{
    if (argc < 2)
        FATAL_ERROR("Usage: scaninc FILE_PATH\n");

    std::stack<std::string> filesToProcess;
    std::set<std::string> dependencies;

    std::string initialPath(argv[1]);

    std::size_t pos = initialPath.find_last_of('.');

    if (pos == std::string::npos)
        FATAL_ERROR("no file extension in path \"%s\"\n", initialPath.c_str());

    std::string extension = initialPath.substr(pos + 1);

    if (extension == "c")
    {
        CFile file(initialPath);

        file.FindIncbins();
        dependencies = file.GetIncbins();
    }
    else if (extension == "s")
    {
        filesToProcess.push(std::string(argv[1]));

        while (!filesToProcess.empty())
        {
            AsmFile file(filesToProcess.top());

            filesToProcess.pop();

            IncDirectiveType incDirectiveType;
            std::string path;

            while ((incDirectiveType = file.ReadUntilIncDirective(path)) != IncDirectiveType::None)
            {
                bool inserted = dependencies.insert(path).second;
                if (inserted
                    && incDirectiveType == IncDirectiveType::Include
                    && CanOpenFile(path))
                    filesToProcess.push(path);
            }
        }
    }
    else
    {
        FATAL_ERROR("unknown extension \"%s\"\n", extension.c_str());
    }

    for (const std::string &path : dependencies)
    {
        printf("%s\n", path.c_str());
    }
}