// console.cpp: the console buffer, its display, and command line control

#include "cube.h"

#include <ctype.h>

#import "Command.h"
#import "ConsoleLine.h"
#import "KeyMapping.h"
#import "OFString+Cube.h"

static OFMutableArray<ConsoleLine *> *conlines;

const int ndraw = 5;
const int WORDWRAP = 80;
int conskip = 0;

bool saycommandon = false;
static OFMutableString *commandbuf;

COMMAND(conskip, ARG_1INT, ^ (int n) {
	conskip += n;
	if (conskip < 0)
		conskip = 0;
})

static void
conline(OFString *sf, bool highlight) // add a line to the console buffer
{
	OFMutableString *text;

	// constrain the buffer size
	if (conlines.count > 100) {
		text = [conlines.lastObject.text mutableCopy];
		[conlines removeLastObject];
	} else
		text = [OFMutableString string];

	if (highlight)
		// show line in a different colour, for chat etc.
		[text appendString: @"\f"];

	[text appendString: sf];

	if (conlines == nil)
		conlines = [[OFMutableArray alloc] init];

	[conlines insertObject: [ConsoleLine lineWithText: text
						  outtime: lastmillis]
		       atIndex: 0];

	puts(text.UTF8String);
#ifndef OF_WINDOWS
	fflush(stdout);
#endif
}

void
conoutf(OFConstantString *format, ...)
{
	va_list arguments;
	va_start(arguments, format);

	OFString *string = [[OFString alloc] initWithFormat: format
						  arguments: arguments];

	va_end(arguments);

	int n = 0;
	while (string.length > WORDWRAP) {
		conline([string substringToIndex: WORDWRAP], n++ != 0);
		string = [string substringFromIndex: WORDWRAP];
	}
	conline(string, n != 0);
}

// render buffer taking into account time & scrolling
void
renderconsole()
{
	int nd = 0;
	OFString *refs[ndraw];

	size_t i = 0;
	for (ConsoleLine *conline in conlines) {
		if (conskip ? i >= conskip - 1 || i >= conlines.count - ndraw :
		    lastmillis - conline.outtime < 20000) {
			refs[nd++] = conline.text;
			if (nd == ndraw)
				break;
		}

		i++;
	}

	for (int j = 0; j < nd; j++)
		draw_text(refs[j], FONTH / 3,
		    (FONTH / 4 * 5) * (nd - j - 1) + FONTH / 3, 2);
}

// keymap is defined externally in keymap.cfg

static OFMutableArray<KeyMapping *> *keyMappings = nil;

COMMAND(keymap, ARG_3STR, ^ (OFString *code, OFString *key, OFString *action) {
	if (keyMappings == nil)
		keyMappings = [[OFMutableArray alloc] init];

	KeyMapping *mapping = [KeyMapping mappingWithCode: code.cube_intValue
						     name: key];
	mapping.action = action;
	[keyMappings addObject: mapping];
})

COMMAND(bind, ARG_2STR, ^ (OFString *key, OFString *action) {
	for (KeyMapping *mapping in keyMappings) {
		if ([mapping.name caseInsensitiveCompare: key] ==
		    OFOrderedSame) {
			mapping.action = action;
			return;
		}
	}

	conoutf(@"unknown key \"%@\"", key);
})

// turns input to the command line on or off
static void
saycommand(OFString *init)
{
	saycommandon = (init != nil);
	if (saycommandon)
		SDL_StartTextInput();
	else
		SDL_StopTextInput();

	if (!editmode)
		Cube.sharedInstance.repeatsKeys = saycommandon;

	if (init == nil)
		init = @"";

	commandbuf = [init mutableCopy];
}

COMMAND(saycommand, ARG_VARI, ^ (OFString *init) {
	saycommand(init);
})

COMMAND(mapmsg, ARG_1STR, ^ (OFString *s) {
	memset(hdr.maptitle, '\0', sizeof(hdr.maptitle));
	strncpy(hdr.maptitle, s.UTF8String, 127);
})

void
pasteconsole()
{
	[commandbuf appendString: @(SDL_GetClipboardText())];
}

static OFMutableArray<OFString *> *vhistory;
static int histpos = 0;

COMMAND(history, ARG_1INT, ^ (int n) {
	static bool rec = false;

	if (!rec && n >= 0 && n < vhistory.count) {
		rec = true;
		execute(vhistory[vhistory.count - n - 1], true);
		rec = false;
	}
})

void
keypress(int code, bool isDown)
{
	// keystrokes go to commandline
	if (saycommandon) {
		if (isDown) {
			switch (code) {
			case SDLK_RETURN:
				break;

			case SDLK_BACKSPACE:
			case SDLK_LEFT:
				if (commandbuf.length > 0)
					[commandbuf deleteCharactersInRange:
					    OFMakeRange(
					    commandbuf.length - 1, 1)];

				resetcomplete();
				break;

			case SDLK_UP:
				if (histpos)
					commandbuf =
					    [vhistory[--histpos] mutableCopy];
				break;

			case SDLK_DOWN:
				if (histpos < vhistory.count)
					commandbuf =
					    [vhistory[histpos++] mutableCopy];
				break;

			case SDLK_TAB:
				complete(commandbuf);
				break;

			case SDLK_v:
				if (SDL_GetModState() &
				    (KMOD_LCTRL | KMOD_RCTRL)) {
					pasteconsole();
					return;
				}

			default:
				resetcomplete();
			}
		} else {
			if (code == SDLK_RETURN) {
				if (commandbuf.length > 0) {
					if (vhistory == nil)
						vhistory = [[OFMutableArray
						    alloc] init];

					if (vhistory.count == 0 ||
					    ![vhistory.lastObject isEqual:
					    commandbuf]) {
						// cap this?
						[vhistory addObject:
						    [commandbuf copy]];
					}
					histpos = vhistory.count;
					if ([commandbuf hasPrefix: @"/"])
						execute(commandbuf, true);
					else
						toserver(commandbuf);
				}
				saycommand(NULL);
			} else if (code == SDLK_ESCAPE) {
				saycommand(NULL);
			}
		}
	} else if (!menukey(code, isDown)) {
		// keystrokes go to menu

		for (KeyMapping *mapping in keyMappings) {
			if (mapping.code == code) {
				// keystrokes go to game, lookup in keymap and
				// execute
				execute(mapping.action, isDown);
				return;
			}
		}
	}
}

void
input(OFString *text)
{
	if (saycommandon)
		[commandbuf appendString: text];
}

OFString *
getcurcommand()
{
	return saycommandon ? commandbuf : NULL;
}

void
writebinds(OFStream *stream)
{
	for (KeyMapping *mapping in keyMappings)
		if (mapping.action.length > 0)
			[stream writeFormat: @"bind \"%@\" [%@]\n",
					     mapping.name, mapping.action];
}