#include <windows.h>
#include <string.h>
#include <time.h>

#include "Daodan_Config.h"
#include "Daodan_Patch.h"
#include "Patches/Utility.h"

#include "Oni/Oni.h"
#include "_Version.h"

#include "Inifile_Reader.h"

#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr[0]))

static const char* iniName = "daodan.ini";
static const char* helpFile = "daodan_help.txt";

static const char* defaultSection = "options";

void DDrConfig_PrintHelp();


ConfigSection_t config[] = {
	{ "patches", "Patches", {
		{ "alttab",
			"Allows user to switch applications while in Oni (Alt-Tab) and use Windows key, however it may enable the screensaver as well.",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "argb8888",
			"Textures using ARGB8888 can be used.",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "binkplay",
			"Fix binkplay calls to use GDI and outro same mode as intro.",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "bsl",
			"Enables d_regen (unfinished) and prevents fly-in portraits from being stretched when playing in widescreen resolutions.",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "cheater",
			"Adds new cheat codes (see section below).",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "cheatsenabled",
			"Enables cheats without having to beat the game first.",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "cheattable",
			"Replaces Oni's cheat table with table that includes new cheats (see section below).",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "chinese",
			"Allow for chinese fonts to be shown.",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "clipcursor",
			"Limit cursor to Oni's window.",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "cooldowntimer",
			"Disables weapon cooldown exploit.",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "daodandisplayenum",
			"Offers more display modes in the Options menu.",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "directinput",
			"Forces on DirectInput.",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "disablecmdline",
			"Replaces existing command line parser with Daodan's in order to add new commands. Meant to be used with getcmdline.",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "fonttexturecache",
			"Doubles size of font texture cache.",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "getcmdline",
			"Replaces existing command line parser with Daodan's in order to add new commands. Meant to be used with disablecmdline.",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "hdscreens_lowres",
			"Allow HD screens with resolution < 1024*768.",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "highres_console",
			"Fixes bug where console line becomes invisible at higher resolutions.",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "kickguns",
			"Unfinished, do not use.",
			C_BOOL,
			{.intBoolVal = false},
			{.intBoolVal = false} },
		{ "largetextures",
			"Textures up to 512x512 can be used.",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "levelplugins",
			"Allows level files to be loaded from the GDF which do not end in \"_Final\".",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "newweap",
			"Picking up a weapon displays a message containing the weapon name and amount of ammo.",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "nomultibyte",
			"Enables languages which use multibyte coding (such as Chinese).",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "optionsvisible",
			"Always show options button in main menu, even when pausing from a game.",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "particledisablebit",
			"Unlocks particle action disabling/enabling bits for all events so that a particle event can occur multiple times.",
			C_BOOL,
			{.intBoolVal = false},
			{.intBoolVal = false} },
		{ "pathfinding",
			"Multiplies size of pathfinding grid cache by eight in order to prevent crashes in large levels.",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "projaware",
			"Allows AI to dodge incoming gunfire properly.",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "safeprintf",
			"Replaces Oni's function that prints to startup.txt with a safer one.",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "showalllasersights",
			"Show all (also enemies') weapon lasersights.",
			C_BOOL,
			{.intBoolVal = false},
			{.intBoolVal = false} },
		{ "showtriggervolumes",
			"Allows BSL variable \"show_triggervolumes\" to work when set to 1.",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "throwtest",
			"Not recommended for use; experiment with allowing enemies to be thrown over railings.",
			C_BOOL,
			{.intBoolVal = false},
			{.intBoolVal = false} },
		{ "usedaodangl",
			"Provides an improved windowed mode (-noswitch); this patch is known to break the hiding of the Windows taskbar in fullscreen mode.",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "usegettickcount",
			"Replaces Oni's timing functions with more accurate ones.",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "wpfadetime",
			"Adds working function for existing BSL command wp_fadetime, sets fade time to 4800.",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ 0, 0, 0, {0}, {0} }
	} },
	{ "options", "Options", {
		{ "border",
			"If \"windowhack\" patch is active, make sure game window has border in windowed mode.",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "debug",
			"???",
			EXT_BOOL,
			{.intBoolVal = false },
			{.extBoolVal = &AKgDebug_DebugMaps } },
		{ "debugfiles",
			"???",
			EXT_BOOL,
			{.intBoolVal = false },
			{.extBoolVal = &BFgDebugFileEnable } },
		{ "findsounds",
			"???",
			EXT_BOOL,
			{.intBoolVal = false },
			{.extBoolVal = &SSgSearchOnDisk } },
		{ "gamma",
			"Enable gamma slider in fullscreen.",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "help",
			"Generates this help file.",
			C_CMD,
			{.intBoolVal = 0},
			{.callback = DDrConfig_PrintHelp} },
		{ "ignore_private_data",
			"? No effect ?",
			EXT_BOOL,
			{.intBoolVal = false },
			{.extBoolVal = &opt_ignore_private_data } },
		{ "sound",
			"???",
			EXT_BOOL,
			{.intBoolVal = true },
			{.extBoolVal = &opt_sound } },
		{ "switch",
			"Always switch screen to resolution on Oni's Options screen, making the game fullscreen; opposite of Oni's built-in argument \"noswitch\".",
			EXT_BOOL,
			{.intBoolVal = true},
			{.extBoolVal = &M3gResolutionSwitch} },
		{ "topmost",
			"Keep game window on top in windowed mode, even when switching applications.",
			C_BOOL,
			{.intBoolVal = false},
			{.intBoolVal = false} },
		{ "usedaodanbsl",
			"Adds new BSL commands (see below).",
			C_BOOL,
			{.intBoolVal = true},
			{.intBoolVal = true} },
		{ "language",
			"Localization for hardcoded strings (e.g. \"Savepoints\").",
			C_STRING,
			{.stringVal = "en"},
			{.stringVal = "en"} },
		{ 0, 0, 0, {0}, {0} }
	} }
};


void DDrConfig_Print()
{
	for (unsigned int s = 0; s < ARRAY_SIZE(config); s++) {
		for (ConfigOption_t* co = config[s].options; co->name != 0; co++) {
			switch (co->type) {
				case C_STRING:
					STARTUPMESSAGE("Option %s.%s = %s (def %s)", config[s].name, co->name, co->value.stringVal, co->defaultValue.stringVal);
					break;
				case EXT_BOOL:
					STARTUPMESSAGE("Option %s.%s = %d (def %d)", config[s].name, co->name, *co->value.extBoolVal, co->defaultValue.intBoolVal);
					break;
				case C_CMD:
					break;
				default:
					STARTUPMESSAGE("Option %s.%s = %d (def %d)", config[s].name, co->name, co->value.intBoolVal, co->defaultValue.intBoolVal);
			}
		}
	}
}

void DDrConfig_PrintHelp()
{
	STARTUPMESSAGE("Writing Daodan help file (%s)", helpFile);

	FILE* fp;
	remove(helpFile);
	fp = fopen(helpFile, "w");
	if (fp)
	{
		time_t rawtime;
		struct tm* timeinfo;
		char buffer[80];
		time(&rawtime);
		timeinfo = localtime(&rawtime);
		strftime(buffer, 80, "%Y-%m-%d %H:%M:%S", timeinfo);
		
		fprintf(fp, "Daodan help - generated on %s for Daodan v."DAODAN_VERSION_STRING"\n\n", buffer);
		fprintf(fp, "List of Daodan configuration parameters:\n");
		for (unsigned int s = 0; s < ARRAY_SIZE(config); s++) {
			fprintf(fp, "    %s - %s:\n", config[s].name, config[s].description);
			for (ConfigOption_t* co = config[s].options; co->name != 0; co++) {
				char* name = co->name;
				char* desc = co->description;
				const char* tName = DDrConfig_GetOptionTypeName(co->type);
				int boolV = co->defaultValue.intBoolVal;
				char* val;
				switch (co->type) {
					case C_STRING:
						val = co->defaultValue.stringVal;
						break;
					case EXT_BOOL:
						val = (boolV ? "true" : "false");
						break;
					case C_BOOL:
						val = (boolV ? "true" : "false");
						break;
					case C_CMD:
						val = "";
						break;
					default:
						val = malloc(20);
						sprintf(val, "%d", boolV);
				}
				fprintf(fp, "        %-22s %6s=%-5s %s\n", name, tName, val, desc);
			}
			fprintf(fp, "\n");
		}
		fprintf(fp, "\nConfiguration parameters can be either set in daodan.ini or passed on command line.\n\n");
		fprintf(fp, "In daodan.ini each section of parameters has its own section in the ini file started by [section name]. Parameters are given within that section by their name only, followed by an equals sign and the desired value. Example:\n");
		fprintf(fp, "    [sectionX]\n    parameterName = false\n");
		fprintf(fp, "\nTo pass the parameter on the command line:\n");
		fprintf(fp, "    Oni.exe -sectionX.parameterName false\n");
		fprintf(fp, "For bool parameters the value can be ommitted so it is regarded as \"true\":\n");
		fprintf(fp, "    Oni.exe -sectionX.parameterName\n");
		fprintf(fp, "To disable a bool parameter you can prefix \"no\" to the parameter name like this:\n");
		fprintf(fp, "    Oni.exe -sectionX.noparameterName\n");
		fprintf(fp, "If no section is given it is assumed to be \"%s\", e.g.\n", defaultSection);
		fprintf(fp, "    Oni.exe -%s.parametername\n", defaultSection);
		fprintf(fp, "can simply be written as\n");
		fprintf(fp, "    Oni.exe -parametername\n");

		fclose(fp);
	}
	else
	{
		STARTUPMESSAGE("Writing Daodan help file failed", 0);
	}
}

const char* DDrConfig_GetOptionTypeName(OptionType_t type)
{
	switch (type) {
		case C_INT:
			return "Int";
		case C_BOOL:
			return "Bool";
		case C_STRING:
			return "String";
		case C_CMD:
			return "Cmd";
		case EXT_BOOL:
			return "pBool";
		default:
			return "unknown";
	}
}

static ConfigOption_t* DDrConfig_GetOption(const char* fullOptName)
{
	char section[50];
	strcpy(section, fullOptName);

	char* option = strchr(section, '.');
	if (option == 0) {
		STARTUPMESSAGE("Could not find option separator in \"%s\"", fullOptName);
		return 0;
	}
	*option++ = 0;

	for (unsigned int s = 0; s < ARRAY_SIZE(config); s++) {
		if (!_stricmp(config[s].name, section)) {
			for (ConfigOption_t* co = config[s].options; co->name != 0; co++) {
				if (!_stricmp(co->name, option)) {
					return co;
				}
			}
			STARTUPMESSAGE("Could not find option \"%s\" in section \"%s\"", option, section);
			return 0;
		}
	}
	STARTUPMESSAGE("Could not find section \"%s\" for option \"%s\"", section, option);
	return 0;
}



ConfigOption_t* DDrConfig_GetOptOfType(const char* fullOptName, OptionType_t type)
{
	ConfigOption_t* co = DDrConfig_GetOption(fullOptName);
	if (co == 0)
		return 0;

	if (co->type != type) {
		STARTUPMESSAGE("Option \"%s\" is not of type %s", fullOptName, DDrConfig_GetOptionTypeName(type));
		return 0;
	}
	return co;
}



void DDrConfig_InitExtBools()
{
	for (unsigned int s = 0; s < ARRAY_SIZE(config); s++) {
		for (ConfigOption_t* co = config[s].options; co->name != 0; co++) {
			if (co->type == EXT_BOOL) {
				*co->value.extBoolVal = co->defaultValue.intBoolVal;
			}
		}
	}
}



void DDrConfig_WriteTemplateIni()
{
	FILE* fp;
	STARTUPMESSAGE("%s doesn't exist, creating", iniName);
	fp = fopen(iniName, "w");
	if (fp)
	{
		for (unsigned int s = 0; s < ARRAY_SIZE(config); s++) {
			fprintf(fp, "[%s]\n", config[s].name);
		}
		fclose(fp);
	}
	else
	{
		STARTUPMESSAGE("Writing %s template file failed", iniName);
	}
}


void DDrIniCallback(const char* section, const char* name, const char* value)
{
	static char curSection[20];
	char fullOptName[50];

	if (!_stricmp(section, "patch"))
		section = "patches";

	strcpy(curSection, section);

	strcpy(fullOptName, curSection);
	fullOptName[strlen(curSection)] = '.';
	strcpy(fullOptName+strlen(curSection)+1, name);

	ConfigOption_t* co = DDrConfig_GetOption(fullOptName);

	if (co)
	{
		char* buf = 0;
		switch (co->type) {
			case C_INT:
				co->value.intBoolVal = strtol(value, NULL, 0);
				break;
			case C_BOOL:
				co->value.intBoolVal = !_stricmp(value, "true");
				break;
			case C_STRING:
				buf = malloc(strlen(value)+1);
				strcpy(buf, value);
				co->value.stringVal = buf;
				break;
			case C_CMD:
				co->value.callback();
				break;
			case EXT_BOOL:
				*(co->value.extBoolVal) = !_stricmp(value, "true");
				break;
			default:
				STARTUPMESSAGE("Config value type unknown: %d", co->type);
		}
	}
}


bool DDrConfig_ParseCommandLine(int argc, char* argv[])
{
	for (int i = 1; i < argc; i ++)
	{
		if (argv[i][0] == '-')
		{
			const char* section;
			char* optionsep;
			char* option;
			bool invertedOption;

			if ((optionsep = strchr(argv[i], '.')))
			// Is "section.option"
			{
				*optionsep = 0;
				option = optionsep+1;
				section = argv[i]+1;
			}
			else
			// Is just "option"
			{
				section = defaultSection;
				option = argv[i]+1;
			}

			invertedOption = (option[0] == 'n' || option[0] == 'N') && (option[1] == 'o' || option[1] == 'O');
			if (invertedOption)
				option += 2;

			if (i < (argc - 1) && argv[i+1][0] != '-')
			// Has value in next field
			{
				DDrIniCallback(section, option, argv[++i]);
			}
			else
			// Implicit value
			{
				DDrIniCallback(section, option, (invertedOption ? "false" : "true"));
			}

			if (optionsep)
				*optionsep = '.';
		}
		else
		{
			STARTUPMESSAGE("Parse error \"%s\"", argv[i]);
			return false;
		}
	}
	return true;
}

void DDrConfig(int argc, char* argv[])
{
	STARTUPMESSAGE("Initializing standard booleans", 0);
	DDrConfig_InitExtBools();

	if (GetFileAttributes(iniName) == INVALID_FILE_ATTRIBUTES)
		DDrConfig_WriteTemplateIni();
	
	STARTUPMESSAGE("Parsing daodan.ini...", 0);
	if (!Inifile_Read(iniName, DDrIniCallback))
		STARTUPMESSAGE("Error reading daodan.ini, check your syntax!", 0);
	STARTUPMESSAGE("Finished parsing", 0);



	STARTUPMESSAGE("Parsing command line...", 0);
	DDrConfig_ParseCommandLine(argc, argv);
	STARTUPMESSAGE("Finished parsing", 0);

//	DDrConfig_Print();
}