#include <GL/glew.h>

#include "../../libslic3r/libslic3r.h"
#include "../../libslic3r/Utils.hpp"
#include "AppConfig.hpp"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <utility>
#include <assert.h>

#include <boost/filesystem.hpp>
#include <boost/nowide/cenv.hpp>
#include <boost/nowide/fstream.hpp>
#include <boost/property_tree/ini_parser.hpp>
#include <boost/property_tree/ptree.hpp>

namespace Slic3r {

void AppConfig::reset()
{
    m_storage.clear();
    set_defaults();
};

// Override missing or keys with their defaults.
void AppConfig::set_defaults()
{
    // Reset the empty fields to defaults.
    if (get("autocenter").empty())
        set("autocenter", "1");
    // Disable background processing by default as it is not stable.
    if (get("background_processing").empty())
        set("background_processing", "0");
    // If set, the "Controller" tab for the control of the printer over serial line and the serial port settings are hidden.
    // By default, Prusa has the controller hidden.
    if (get("no_controller").empty())
        set("no_controller", "1");
    // If set, the "- default -" selections of print/filament/printer are suppressed, if there is a valid preset available.
    if (get("no_defaults").empty())
        set("no_defaults", "1");
    if (get("show_incompatible_presets").empty())
        set("show_incompatible_presets", "0");
    // Version check is enabled by default in the config, but it is not implemented yet.
    if (get("version_check").empty())
        set("version_check", "1");
}

void AppConfig::load()
{
    // 1) Read the complete config file into a boost::property_tree.
    namespace pt = boost::property_tree;
    pt::ptree tree;
    boost::nowide::ifstream ifs(AppConfig::config_path());
    pt::read_ini(ifs, tree);

    // 2) Parse the property_tree, extract the sections and key / value pairs.
    for (const auto &section : tree) {
    	if (section.second.empty()) {
    		// This may be a top level (no section) entry, or an empty section.
    		std::string data = section.second.data();
    		if (! data.empty())
    			// If there is a non-empty data, then it must be a top-level (without a section) config entry.
    			m_storage[""][section.first] = data;
    	} else {
    		// This must be a section name. Read the entries of a section.
    		std::map<std::string, std::string> &storage = m_storage[section.first];
            for (auto &kvp : section.second)
            	storage[kvp.first] = kvp.second.data();
        }
    }

    // Override missing or keys with their defaults.
    this->set_defaults();
    m_dirty = false;
}

void AppConfig::save()
{
    boost::nowide::ofstream c;
    c.open(AppConfig::config_path(), std::ios::out | std::ios::trunc);
    c << "# " << Slic3r::header_slic3r_generated() << std::endl;
    // Make sure the "no" category is written first.
    for (const std::pair<std::string, std::string> &kvp : m_storage[""])
        c << kvp.first << " = " << kvp.second << std::endl;
    // Write the other categories.
    for (const auto category : m_storage) {
    	if (category.first.empty())
    		continue;
    	c << std::endl << "[" << category.first << "]" << std::endl;
    	for (const std::pair<std::string, std::string> &kvp : category.second)
	        c << kvp.first << " = " << kvp.second << std::endl;
	}
    c.close();
    m_dirty = false;
}

std::string AppConfig::get_last_dir() const
{
    const auto it = m_storage.find("recent");
    if (it != m_storage.end()) {
        {
            const auto it2 = it->second.find("skein_directory");
            if (it2 != it->second.end() && ! it2->second.empty())
                return it2->second;
        }
        {
            const auto it2 = it->second.find("config_directory");
            if (it2 != it->second.end() && ! it2->second.empty())
                return it2->second;
        }
    }
    return std::string();
}

void AppConfig::update_config_dir(const std::string &dir)
{
    this->set("recent", "config_directory", dir);
}

void AppConfig::update_skein_dir(const std::string &dir)
{
    this->set("recent", "skein_directory", dir);
}

std::string AppConfig::get_last_output_dir(const std::string &alt) const
{
    const auto it = m_storage.find("");
    if (it != m_storage.end()) {
        const auto it2 = it->second.find("last_output_path");
        const auto it3 = it->second.find("remember_output_path");
        if (it2 != it->second.end() && it3 != it->second.end() && ! it2->second.empty() && it3->second == "1")
            return it2->second;
    }
    return alt;
}

void AppConfig::update_last_output_dir(const std::string &dir)
{
    this->set("", "last_output_path", dir);
}

std::string AppConfig::config_path()
{
	return (boost::filesystem::path(Slic3r::data_dir()) / "slic3r.ini").make_preferred().string();
}

bool AppConfig::exists()
{
    return boost::filesystem::exists(AppConfig::config_path());
}

}; // namespace Slic3r