/*
 * MIT License
 *
 * Copyright (c) 2025 Vanessa T. <nessa@neko-tools.de>
 *
 * 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 <stdexcept>
#include "CommandLine.h"
#include "Utility.h"

enum class Option {
    None,
    ProcessId,
    ImagePath,
    WindowTitle,
    Text,
    Order
};

void CommandLine::parse(const std::vector<std::string>& args) {
    auto option = Option::None;

    for (auto& arg : args) {
        switch (option) {
            case Option::None:
                if (arg == "-h" || arg == "--help") {
                    showHelp = true;
                } else if (arg == "-f" || arg == "--foreground") {
                    bringToForeground = true;
                } else if (arg == "-l" || arg == "--list-processes") {
                    listProcesses = true;
                } else if (arg == "-r" || arg == "--reverse") {
                    reverseOrder = true;
                } else if (arg == "-I" || arg == "--image-path") {
                    option = Option::ImagePath;
                } else if (arg == "-W" || arg == "--window-title") {
                    option = Option::WindowTitle;
                } else if (arg == "-T" || arg == "--text") {
                    option = Option::Text;
                } else if (arg == "-p" || arg == "--process-id") {
                    option = Option::ProcessId;
                } else if (arg == "-o" || arg == "--order") {
                    option = Option::Order;
                } else {
                    throw std::runtime_error("Unknown option: " + arg);
                }
                break;
            case Option::ImagePath:
                imagePath = arg;
                option = Option::None;
                break;
            case Option::WindowTitle:
                windowTitle = arg;
                option = Option::None;
                break;
            case Option::Text:
                text = arg;
                option = Option::None;
                break;
            case Option::ProcessId:
                processId = std::stoi(arg);
                option = Option::None;
                break;
            case Option::Order:
                auto lowerArg = toLowerCase(arg);
                if (arg == "pid") {
                    sortOrder = CommandLine::SortOrder::ProcessId;
                } else if (arg == "path") {
                    sortOrder = CommandLine::SortOrder::ImagePath;
                } else if (arg == "ram") {
                    sortOrder = CommandLine::SortOrder::RamUsage;
                } else {
                    throw std::runtime_error("Unknown sort order: " + arg);
                }
                option = Option::None;
                break;
        }
    }

    if (!valid()) {
        throw std::runtime_error("Invalid command line");
    }
}

bool CommandLine::valid() const {
    if (showHelp) return true;

    if (listProcesses) {
        if (processId > 0) return false;
        if (!imagePath.empty()) return false;
        if (!windowTitle.empty()) return false;
        if (!text.empty()) return false;

        return true;
    }

    if (processId > 0) {
        if (!imagePath.empty()) return false;
        if (!windowTitle.empty()) return false;
        if (!text.empty()) return false;

        return true;
    }

    if (!imagePath.empty()) {
        if (!windowTitle.empty()) return false;
        if (!text.empty()) return false;

        return true;
    }

    if (!windowTitle.empty()) {
        if (!text.empty()) return false;

        return true;
    }

    if (text.empty()) return false;

    return true;
}