/* Copyright 2021 Aristocratos (jakob@qvantnet.com)

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

	   http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

indent = tab
tab-size = 4
*/

#pragma once

#include <filesystem>
#include <optional>
#include <string>
#include <vector>

#include <unordered_map>

using std::string;
using std::vector;

//* Functions and variables for reading and writing the btop config file
namespace Config {

	extern std::filesystem::path conf_dir;
	extern std::filesystem::path conf_file;

	extern std::unordered_map<std::string_view, string> strings;
	extern std::unordered_map<std::string_view, string> stringsTmp;
	extern std::unordered_map<std::string_view, bool> bools;
	extern std::unordered_map<std::string_view, bool> boolsTmp;
	extern std::unordered_map<std::string_view, int> ints;
	extern std::unordered_map<std::string_view, int> intsTmp;

	const vector<string> valid_graph_symbols = { "braille", "block", "tty" };
	const vector<string> valid_graph_symbols_def = { "default", "braille", "block", "tty" };
	const vector<string> valid_boxes = {
		"cpu", "mem", "net", "proc"
#ifdef GPU_SUPPORT
		,"gpu0", "gpu1", "gpu2", "gpu3", "gpu4", "gpu5"
#endif
		};
	const vector<string> temp_scales = { "celsius", "fahrenheit", "kelvin", "rankine" };
#if defined(__linux__) || defined(__CYGWIN__)
	const vector<string> freq_modes = { "first", "range", "lowest", "highest", "average" };
#endif
#ifdef GPU_SUPPORT
	const vector<string> show_gpu_values = { "Auto", "On", "Off" };
#endif
    const vector<string> base_10_bitrate_values = { "Auto", "True", "False" };
	extern vector<string> current_boxes;
	extern vector<string> preset_list;
	const vector<string> disable_preset_options = { "Off", "Default", "Custom", "All" };
	extern vector<string> available_batteries;
	extern std::optional<int> current_preset;

	extern bool write_new;

	constexpr int ONE_DAY_MILLIS = 1000 * 60 * 60 * 24;

	[[nodiscard]] std::optional<std::filesystem::path> get_config_dir() noexcept;

	//* Check if string only contains space separated valid names for boxes and set current_boxes
	bool set_boxes(const string& boxes);

	bool validBoxSizes(const string& boxes);

	//* Toggle box and update config string shown_boxes
	bool toggle_box(const string& box);

	//* Parse and setup config value presets
	bool presetsValid(const string& presets);

	//* Apply selected preset
	bool apply_preset(const string& preset);

	bool _locked(const std::string_view name);

	//* Return bool for config key <name>
	inline bool getB(const std::string_view name) { return bools.at(name); }

	//* Return integer for config key <name>
	inline const int& getI(const std::string_view name) { return ints.at(name); }

	//* Return string for config key <name>
	inline const string& getS(const std::string_view name) { return strings.at(name); }

	string getAsString(const std::string_view name);

	extern string validError;

	bool intValid(const std::string_view name, const string& value);
	bool stringValid(const std::string_view name, const string& value);

	//* Set config key <name> to bool <value>
	inline void set(const std::string_view name, bool value) {
		if (_locked(name)) boolsTmp.insert_or_assign(name, value);
		else bools.at(name) = value;
	}

	//* Set config key <name> to int <value>
	inline void set(const std::string_view name, const int value) {
		if (_locked(name)) intsTmp.insert_or_assign(name, value);
		else ints.at(name) = value;
	}

	//* Set config key <name> to string <value>
	inline void set(const std::string_view name, const string& value) {
		if (_locked(name)) stringsTmp.insert_or_assign(name, value);
		else strings.at(name) = value;
	}

	//* Flip config key bool <name>
	void flip(const std::string_view name);

	//* Lock config and cache changes until unlocked
	void lock();

	//* Unlock config and write any cached values to config
	void unlock();

	//* Load the config file from disk
	void load(const std::filesystem::path& conf_file, vector<string>& load_warnings);

	//* Write the config file to disk
	void write();

	auto get_log_file() -> std::optional<std::filesystem::path>;

	// Write default config to an in-memory buffer
	[[nodiscard]] auto current_config() -> std::string;
}
