//

//  MapConfigViewController.m

//  HedgewarsMobile

//

//  Created by Vittorio on 22/04/10.

//  Copyright 2010 __MyCompanyName__. All rights reserved.

//

#import "MapConfigViewController.h"

#import "PascalImports.h"

#import "CommodityFunctions.h"

#import "UIImageExtra.h"

#import "SDL_net.h"

#import <pthread.h>

#define INDICATOR_TAG 7654

@implementation MapConfigViewController

@synthesize previewButton, maxHogs, seedCommand, templateFilterCommand, mapGenCommand, mazeSizeCommand, themeCommand,

            tableView, maxLabel, sizeLabel, segmentedControl, slider, lastIndexPath, themeArray, mapArray, busy;

-(BOOL) shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {

    return rotationManager(interfaceOrientation);

}

#pragma mark -

#pragma mark Preview Handling

-(int) sendToEngine: (NSString *)string {

    unsigned char length = [string length];

    SDLNet_TCP_Send(csd, &length , 1);

    return SDLNet_TCP_Send(csd, [string UTF8String], length);

}

-(const uint8_t *)engineProtocol:(NSInteger) port {

    IPaddress ip;

    BOOL serverQuit = NO;

    static uint8_t map[128*32];

    if (SDLNet_Init() < 0) {

        NSLog(@"SDLNet_Init: %s", SDLNet_GetError());

        serverQuit = YES;

    }

    // Resolving the host using NULL make network interface to listen

    if (SDLNet_ResolveHost(&ip, NULL, port) < 0) {

        NSLog(@"SDLNet_ResolveHost: %s\n", SDLNet_GetError());

        serverQuit = YES;

    }

    // Open a connection with the IP provided (listen on the host's port)

    if (!(sd = SDLNet_TCP_Open(&ip))) {

        NSLog(@"SDLNet_TCP_Open: %s %\n", SDLNet_GetError(), port);

        serverQuit = YES;

    }

    // launch the preview here so that we're sure the tcp channel is open

    pthread_t thread_id;

    pthread_create(&thread_id, NULL, (void *)GenLandPreview, (void *)port);

    pthread_detach(thread_id);

    DLog(@"Waiting for a client on port %d", port);

    while (!serverQuit) {

        /* This check the sd if there is a pending connection.

         * If there is one, accept that, and open a new socket for communicating */

        csd = SDLNet_TCP_Accept(sd);

        if (NULL != csd) {          

            DLog(@"Client found");

            [self sendToEngine:self.seedCommand];

            [self sendToEngine:self.templateFilterCommand];

            [self sendToEngine:self.mapGenCommand];

            [self sendToEngine:self.mazeSizeCommand];

            [self sendToEngine:@"!"];

            memset(map, 0, 128*32);

            SDLNet_TCP_Recv(csd, map, 128*32);

            SDLNet_TCP_Recv(csd, &maxHogs, sizeof(uint8_t));

            SDLNet_TCP_Close(csd);

            serverQuit = YES;

        }

    }

    SDLNet_TCP_Close(sd);

    SDLNet_Quit();

    return map;

}

-(void) drawingThread {

    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

    // select the port for IPC and launch the preview generation through engineProtocol:

    int port = randomPort();

    const uint8_t *map = [self engineProtocol:port];

    uint8_t mapExp[128*32*8];

    // draw the buffer (1 pixel per component, 0= transparent 1= color)

    int k = 0;

    for (int i = 0; i < 32*128; i++) {

        unsigned char byte = map[i];

        for (int j = 0; j < 8; j++) {

            // select the color based on the leftmost bit

            if ((byte & 0x80) != 0)

                mapExp[k] = 100;

            else

                mapExp[k] = 255;

            // shift to next bit

            byte <<= 1;

            k++;

        }

    }

    CGColorSpaceRef colorspace = CGColorSpaceCreateDeviceGray();

    CGContextRef bitmapImage = CGBitmapContextCreate(mapExp, 256, 128, 8, 256, colorspace, kCGImageAlphaNone);

    CGColorSpaceRelease(colorspace);

    CGImageRef previewCGImage = CGBitmapContextCreateImage(bitmapImage);

    UIImage *previewImage = [[UIImage alloc] initWithCGImage:previewCGImage];

    CGImageRelease(previewCGImage);

    previewCGImage = nil;

    // set the preview image (autoreleased) in the button and the maxhog label on the main thread to prevent a leak

    [self performSelectorOnMainThread:@selector(setButtonImage:) withObject:[previewImage makeRoundCornersOfSize:CGSizeMake(12, 12)] waitUntilDone:NO];

    [previewImage release];

    [self performSelectorOnMainThread:@selector(setLabelText:) withObject:[NSString stringWithFormat:@"%d", maxHogs] waitUntilDone:NO];

    // restore functionality of button and remove the spinning wheel on the main thread to prevent a leak

    [self performSelectorOnMainThread:@selector(turnOnWidgets) withObject:nil waitUntilDone:NO];

    [pool release];

    //Invoking this method should be avoided as it does not give your thread a chance to clean up any resources it allocated during its execution.

    //[NSThread exit];

    /*

    // http://developer.apple.com/mac/library/qa/qa2001/qa1037.html

    UIGraphicsBeginImageContext(CGSizeMake(256,128));      

    CGContextRef context = UIGraphicsGetCurrentContext();       

    UIGraphicsPushContext(context);  

    CGContextSetRGBFillColor(context, 0.5, 0.5, 0.7, 1.0);

    CGContextFillRect(context,CGRectMake(xc,yc,1,1));

    UIGraphicsPopContext();

    UIImage *previewImage = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    */

}

-(IBAction) updatePreview {

    // don't generate a new preview while it's already generating one

    if (busy)

        return;

    // generate a seed

    CFUUIDRef uuid = CFUUIDCreate(kCFAllocatorDefault);

    NSString *seed = (NSString *)CFUUIDCreateString(kCFAllocatorDefault, uuid);

    CFRelease(uuid);

    NSString *seedCmd = [[NSString alloc] initWithFormat:@"eseed {%@}", seed];

    [seed release];

    self.seedCommand = seedCmd;

    [seedCmd release];

    NSIndexPath *theIndex;

    if (segmentedControl.selectedSegmentIndex != 1) {

        // prevent other events and add an activity while the preview is beign generated

        [self turnOffWidgets];

        // remove the current preview

        [self.previewButton setImage:nil forState:UIControlStateNormal];

        // add a very nice spinning wheel

        UIActivityIndicatorView *indicator = [[UIActivityIndicatorView alloc] 

                                              initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];

        indicator.center = CGPointMake(previewButton.bounds.size.width / 2, previewButton.bounds.size.height / 2);

        indicator.tag = INDICATOR_TAG;

        [indicator startAnimating];

        [self.previewButton addSubview:indicator];

        [indicator release];

        // let's draw in a separate thread so the gui can work; at the end it restore other widgets

        [NSThread detachNewThreadSelector:@selector(drawingThread) toTarget:self withObject:nil];

        theIndex = [NSIndexPath indexPathForRow:(random()%[self.themeArray count]) inSection:0];

    } else {

        theIndex = [NSIndexPath indexPathForRow:(random()%[self.mapArray count]) inSection:0];

    }

    [self.tableView reloadData];

    [self tableView:self.tableView didSelectRowAtIndexPath:theIndex];

    [self.tableView scrollToRowAtIndexPath:theIndex atScrollPosition:UITableViewScrollPositionNone animated:YES];

}

-(void) updatePreviewWithMap:(NSInteger) index {

    // change the preview button

    NSString *fileImage = [[NSString alloc] initWithFormat:@"%@/%@/preview.png", MAPS_DIRECTORY(),[self.mapArray objectAtIndex:index]];

    UIImage *image = [[UIImage alloc] initWithContentsOfFile:fileImage];

    [fileImage release];

    [self.previewButton setImage:[image makeRoundCornersOfSize:CGSizeMake(12, 12)] forState:UIControlStateNormal];

    [image release];

    // update label

    maxHogs = 18;

    NSString *fileCfg = [[NSString alloc] initWithFormat:@"%@/%@/map.cfg", MAPS_DIRECTORY(),[self.mapArray objectAtIndex:index]];

    NSString *contents = [[NSString alloc] initWithContentsOfFile:fileCfg encoding:NSUTF8StringEncoding error:NULL];

    [fileCfg release];

    NSArray *split = [contents componentsSeparatedByString:@"\n"];

    // if the number is not set we keep 18 standard; 

    // sometimes it's not set but there are trailing characters, we get around them with the second equation

    if ([split count] > 1 && [[split objectAtIndex:1] intValue] > 0)

        maxHogs = [[split objectAtIndex:1] intValue];

    [contents release];

    NSString *max = [[NSString alloc] initWithFormat:@"%d",maxHogs];

    self.maxLabel.text = max;

    [max release];

}

-(void) turnOffWidgets {

    busy = YES;

    self.previewButton.alpha = 0.5f;

    self.previewButton.enabled = NO;

    self.maxLabel.text = @"...";

    self.segmentedControl.enabled = NO;

    self.slider.enabled = NO;

}

-(void) turnOnWidgets {

    self.previewButton.alpha = 1.0f;

    self.previewButton.enabled = YES;

    self.segmentedControl.enabled = YES;

    self.slider.enabled = YES;

    busy = NO;

    UIActivityIndicatorView *indicator = (UIActivityIndicatorView *)[self.previewButton viewWithTag:INDICATOR_TAG];

    if (indicator) {

        [indicator stopAnimating];

        [indicator removeFromSuperview];

    }

}

-(void) setLabelText:(NSString *)str {

    self.maxLabel.text = str;

}

-(void) setButtonImage:(UIImage *)img {

    [self.previewButton setBackgroundImage:img forState:UIControlStateNormal];

}

-(void) restoreBackgroundImage {

    // white rounded rectangle as background image for previewButton

    UIGraphicsBeginImageContext(CGSizeMake(256,128));      

    CGContextRef context = UIGraphicsGetCurrentContext();       

    UIGraphicsPushContext(context);  

    CGContextSetRGBFillColor(context, 1.0, 1.0, 1.0, 1.0);

    CGContextFillRect(context,CGRectMake(0,0,256,128));

    UIGraphicsPopContext();

    UIImage *bkgImg = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    [self.previewButton setBackgroundImage:[bkgImg makeRoundCornersOfSize:CGSizeMake(12, 12)] forState:UIControlStateNormal];

}

#pragma mark -

#pragma mark Table view data source

-(NSInteger) numberOfSectionsInTableView:(UITableView *)tableView {

    return 1;

}

-(NSInteger) tableView:(UITableView *)aTableView numberOfRowsInSection:(NSInteger) section {

    if (self.segmentedControl.selectedSegmentIndex != 1)

        return [themeArray count];

    else

        return [mapArray count];

}

-(UITableViewCell *)tableView:(UITableView *)aTableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

    static NSString *CellIdentifier = @"Cell";

    NSInteger row = [indexPath row];

    UITableViewCell *cell = [aTableView dequeueReusableCellWithIdentifier:CellIdentifier];

    if (cell == nil) 

        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];

    if (self.segmentedControl.selectedSegmentIndex != 1) {

        // the % prevents a strange bug that occurs sporadically

        NSString *themeName = [self.themeArray objectAtIndex:row % [self.themeArray count]];

        cell.textLabel.text = themeName;

        UIImage *image = [[UIImage alloc] initWithContentsOfFile:[NSString stringWithFormat:@"%@/%@/icon.png",THEMES_DIRECTORY(),themeName]];

        cell.imageView.image = image;

        [image release];

    } else {

        cell.textLabel.text = [self.mapArray objectAtIndex:row];

        cell.imageView.image = nil;

    }

    if (row == [self.lastIndexPath row]) 

        cell.accessoryType = UITableViewCellAccessoryCheckmark;

    else

        cell.accessoryType = UITableViewCellAccessoryNone;

    return cell;

}

#pragma mark -

#pragma mark Table view delegate

-(void) tableView:(UITableView *)aTableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

    int newRow = [indexPath row];

    int oldRow = (lastIndexPath != nil) ? [lastIndexPath row] : -1;

    if (newRow != oldRow) {

        if (self.segmentedControl.selectedSegmentIndex != 1) {

            NSString *theme = [self.themeArray objectAtIndex:newRow];

            self.themeCommand =  [NSString stringWithFormat:@"etheme %@", theme];

        } else

            [self updatePreviewWithMap:newRow];

        UITableViewCell *newCell = [aTableView cellForRowAtIndexPath:indexPath]; 

        newCell.accessoryType = UITableViewCellAccessoryCheckmark;

        UITableViewCell *oldCell = [aTableView cellForRowAtIndexPath:self.lastIndexPath];

        oldCell.accessoryType = UITableViewCellAccessoryNone;

        self.lastIndexPath = indexPath;

        [aTableView selectRowAtIndexPath:indexPath animated:YES scrollPosition:UITableViewScrollPositionNone];

    }

    [aTableView deselectRowAtIndexPath:indexPath animated:YES];

}

#pragma mark -

#pragma mark slider & segmentedControl

// this updates the label and the command keys when the slider is moved, depending of the selection in segmentedControl

// no methods are called by this routine and you can pass nil to it

-(IBAction) sliderChanged:(id) sender {

    NSString *labelText;

    NSString *templateCommand;

    NSString *mazeCommand;

    switch ((int)(self.slider.value*100)) {

        case 0:

            if (self.segmentedControl.selectedSegmentIndex == 0) {

                labelText = NSLocalizedString(@"Wacky",@"");

            } else {

                labelText = NSLocalizedString(@"Large Floating Islands",@"");

            }

            templateCommand = @"e$template_filter 5";

            mazeCommand = @"e$maze_size 5";

            break;

        case 1:

            if (self.segmentedControl.selectedSegmentIndex == 0) {

                labelText = NSLocalizedString(@"Cavern",@"");

            } else {

                labelText = NSLocalizedString(@"Medium Floating Islands",@"");

            }

            templateCommand = @"e$template_filter 4";

            mazeCommand = @"e$maze_size 4";

            break;

        case 2:

            if (self.segmentedControl.selectedSegmentIndex == 0) {

                labelText = NSLocalizedString(@"Small",@"");

            } else {

                labelText = NSLocalizedString(@"Small Floating Islands",@"");

            }

            templateCommand = @"e$template_filter 1";

            mazeCommand = @"e$maze_size 3";

            break;

        case 3:

            if (self.segmentedControl.selectedSegmentIndex == 0) {

                labelText = NSLocalizedString(@"Medium",@"");

            } else {

                labelText = NSLocalizedString(@"Large Tunnels",@"");

            }

            templateCommand = @"e$template_filter 2";

            mazeCommand = @"e$maze_size 2";

            break;

        case 4:

            if (self.segmentedControl.selectedSegmentIndex == 0) {

                labelText = NSLocalizedString(@"Large",@"");

            } else {

                labelText = NSLocalizedString(@"Medium Tunnels",@"");

            }

            templateCommand = @"e$template_filter 3";

            mazeCommand = @"e$maze_size 1";

            break;

        case 5:

            if (self.segmentedControl.selectedSegmentIndex == 0) {

                labelText = NSLocalizedString(@"All",@"");

            } else {

                labelText = NSLocalizedString(@"Small Tunnels",@"");

            }

            templateCommand = @"e$template_filter 0";

            mazeCommand = @"e$maze_size 0";

            break;

        default:

            labelText = nil;

            templateCommand = nil;

            mazeCommand = nil;

            break;

    }

    self.sizeLabel.text = labelText;

    self.templateFilterCommand = templateCommand;

    self.mazeSizeCommand = mazeCommand;

}

// update preview (if not busy and if its value really changed) as soon as the user lifts its finger up

-(IBAction) sliderEndedChanging:(id) sender {

    int num = (int) (self.slider.value * 100);

    if (oldValue != num) {

        [self updatePreview];

        oldValue = num;

    }

}

// perform actions based on the activated section, then call updatePreview to visually update the selection 

// updatePreview will call didSelectRowAtIndexPath which will call the right update routine)

// and if necessary update the table with a slide animation

-(IBAction) segmentedControlChanged:(id) sender {

    NSString *mapgen;

    NSInteger newPage = self.segmentedControl.selectedSegmentIndex;

    switch (newPage) {

        case 0: // Random

            mapgen = @"e$mapgen 0";

            [self sliderChanged:nil];

            self.slider.enabled = YES;

            break;

        case 1: // Map

            mapgen = @"e$mapgen 0";

            self.slider.enabled = NO;

            self.sizeLabel.text = @".";

            [self restoreBackgroundImage];

            break;

        case 2: // Maze

            mapgen = @"e$mapgen 1";

            [self sliderChanged:nil];

            self.slider.enabled = YES;

            break;

        default:

            mapgen = nil;

            break;

    }

    self.mapGenCommand = mapgen;

    [self updatePreview];

    // nice animation for updating the table when appropriate (on iphone)

    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)

        if (((oldPage == 0 || oldPage == 2) && newPage == 1) ||

            (oldPage == 1 && (newPage == 0 || newPage == 2))) {

            [UIView beginAnimations:@"moving out table" context:NULL];

            self.tableView.frame = CGRectMake(480, 0, 185, 276);

            [UIView commitAnimations];

            [self performSelector:@selector(moveTable) withObject:nil afterDelay:0.2];

        }

    oldPage = newPage;

}

// update data when table is not visible and then show it

-(void) moveTable {

    [self.tableView reloadData];

    [UIView beginAnimations:@"moving in table" context:NULL];

    self.tableView.frame = CGRectMake(295, 0, 185, 276);

    [UIView commitAnimations];

}

#pragma mark -

#pragma mark view management

-(void) viewDidLoad {

    [super viewDidLoad];

    srandom(time(NULL));

    CGSize screenSize = [[UIScreen mainScreen] bounds].size;

    self.view.frame = CGRectMake(0, 0, screenSize.height, screenSize.width - 44);

    // themes.cfg contains all the user-selectable themes

    NSString *string = [[NSString alloc] initWithContentsOfFile:[THEMES_DIRECTORY() stringByAppendingString:@"/themes.cfg"]

                                                       encoding:NSUTF8StringEncoding 

                                                          error:NULL];

    NSMutableArray *array = [[NSMutableArray alloc] initWithArray:[string componentsSeparatedByString:@"\n"]];

    [string release];

    // remove a trailing "" element

    [array removeLastObject];

    self.themeArray = array;

    [array release];

    self.mapArray = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:MAPS_DIRECTORY() error:NULL];

    self.tableView.rowHeight = 42;

    busy = NO;

    // draw a white background