// Objective-C programmers shall recoil in fear at this mess

#import <Cocoa/Cocoa.h>

#include "duke3d.h"
#include "game.h"
#include "common.h"
#include "common_game.h"
#include "build.h"
#include "compat.h"
#include "baselayer.h"
#include "grpscan.h"

#import "GrpFile.game.h"
#import "GameListSource.game.h"

static id nsapp;

static struct {
    grpfile_t const * grp;
    int fullscreen;
    int xdim3d, ydim3d, bpp3d;
    int forcesetup;
    int samplerate, bitspersample, channels;
} settings;

static struct soundQuality_t {
    int frequency;
    int samplesize;
    int channels;
} * soundQualities = 0;


@interface StartupWinController : NSWindowController
{
    NSMutableArray *modeslist3d;
    GameListSource *gamelistsrc;

    IBOutlet NSButton *alwaysShowButton;
    IBOutlet NSButton *fullscreenButton;
    IBOutlet NSTextView *messagesView;
    IBOutlet NSTabView *tabView;
    IBOutlet NSPopUpButton *videoMode3DPUButton;
    IBOutlet NSPopUpButton *soundQualityPUButton;
    IBOutlet NSScrollView *gameList;

    IBOutlet NSButton *cancelButton;
    IBOutlet NSButton *startButton;
}

- (void)dealloc;
- (void)populateVideoModes:(BOOL)firstTime;
- (void)populateSoundQuality:(BOOL)firstTime;

- (IBAction)alwaysShowClicked:(id)sender;
- (IBAction)fullscreenClicked:(id)sender;

- (IBAction)cancel:(id)sender;
- (IBAction)start:(id)sender;

- (void)setupRunMode;
- (void)setupMessagesMode;
- (void)putsMessage:(NSString *)str;
- (void)setTitle:(NSString *)str;

@end

@implementation StartupWinController

- (void)dealloc
{
    [gamelistsrc release];
    [modeslist3d release];
    [super dealloc];
}

- (void)populateVideoModes:(BOOL)firstTime
{
    int i, mode3d, fullscreen = ([fullscreenButton state] == NSOnState);
    int idx3d = -1;
    int xdim = 0, ydim = 0, bpp = 0;

    if (firstTime) {
        xdim = settings.xdim3d;
        ydim = settings.ydim3d;
        bpp  = settings.bpp3d;
    } else {
        mode3d = [[modeslist3d objectAtIndex:[videoMode3DPUButton indexOfSelectedItem]] intValue];
        if (mode3d >= 0) {
            xdim = validmode[mode3d].xdim;
            ydim = validmode[mode3d].ydim;
            bpp = validmode[mode3d].bpp;
        }

    }
    mode3d = checkvideomode(&xdim, &ydim, bpp, fullscreen, 1);
    if (mode3d < 0) {
        int i, cd[] = { 32, 24, 16, 15, 8, 0 };
        for (i=0; cd[i]; ) { if (cd[i] >= bpp) i++; else break; }
        for ( ; cd[i]; i++) {
            mode3d = checkvideomode(&xdim, &ydim, cd[i], fullscreen, 1);
            if (mode3d < 0) continue;
            break;
        }
    }

    [modeslist3d release];
    [videoMode3DPUButton removeAllItems];

    modeslist3d = [[NSMutableArray alloc] init];

    for (i = 0; i < validmodecnt; i++) {
        if (fullscreen == validmode[i].fs) {
            if (i == mode3d) idx3d = [modeslist3d count];
            [modeslist3d addObject:[NSNumber numberWithInt:i]];
            [videoMode3DPUButton addItemWithTitle:[NSString stringWithFormat:@"%d %C %d %d-bpp",
                                                   validmode[i].xdim, 0xd7, validmode[i].ydim, validmode[i].bpp]];
        }
    }

    if (idx3d >= 0) [videoMode3DPUButton selectItemAtIndex:idx3d];
}

- (void)populateSoundQuality:(BOOL)firstTime
{
    int i, curidx = -1;

    [soundQualityPUButton removeAllItems];

    for (i = 0; soundQualities[i].frequency > 0; i++) {
        const char *ch;
        switch (soundQualities[i].channels) {
            case 1: ch = "Mono"; break;
            case 2: ch = "Stereo"; break;
            default: ch = "?"; break;
        }

        NSString *s = [NSString stringWithFormat:@"%dkHz, %d-bit, %s",
                            soundQualities[i].frequency / 1000,
                            soundQualities[i].samplesize,
                            ch
                     ];
        [soundQualityPUButton addItemWithTitle:s];

        if (firstTime &&
            soundQualities[i].frequency == settings.samplerate &&
            soundQualities[i].samplesize == settings.bitspersample &&
            soundQualities[i].channels == settings.channels) {
            curidx = i;
        }
    }

    if (firstTime && curidx < 0) {
        soundQualities[i].frequency = settings.samplerate;
        soundQualities[i].samplesize = settings.bitspersample;
        soundQualities[i].channels = settings.channels;

        const char *ch;
        switch (soundQualities[i].channels) {
            case 1: ch = "Mono"; break;
            case 2: ch = "Stereo"; break;
            default: ch = "?"; break;
        }
        NSString *s = [NSString stringWithFormat:@"%dkHz, %d-bit, %s",
                       soundQualities[i].frequency / 1000,
                       soundQualities[i].samplesize,
                       ch
                       ];
        [soundQualityPUButton addItemWithTitle:s];

        curidx = i++;
        soundQualities[i].frequency = -1;
    }

    if (curidx >= 0) {
        [soundQualityPUButton selectItemAtIndex:curidx];
    }
}

- (IBAction)alwaysShowClicked:(id)sender
{
    UNREFERENCED_PARAMETER(sender);
}

- (IBAction)fullscreenClicked:(id)sender
{
    UNREFERENCED_PARAMETER(sender);

    [self populateVideoModes:NO];
}

- (IBAction)cancel:(id)sender
{
    UNREFERENCED_PARAMETER(sender);

    [nsapp abortModal];
}

- (IBAction)start:(id)sender
{
    UNREFERENCED_PARAMETER(sender);

    int mode = [[modeslist3d objectAtIndex:[videoMode3DPUButton indexOfSelectedItem]] intValue];
    if (mode >= 0) {
        settings.xdim3d = validmode[mode].xdim;
        settings.ydim3d = validmode[mode].ydim;
        settings.bpp3d = validmode[mode].bpp;
        settings.fullscreen = validmode[mode].fs;
    }

    int quality = [soundQualityPUButton indexOfSelectedItem];
    if (quality >= 0) {
        settings.samplerate = soundQualities[quality].frequency;
        settings.bitspersample = soundQualities[quality].samplesize;
        settings.channels = soundQualities[quality].channels;
    }

    int row = [[gameList documentView] selectedRow];
    if (row >= 0) {
        settings.grp = [[gamelistsrc grpAtIndex:row] entryptr];
    }

    settings.forcesetup = [alwaysShowButton state] == NSOnState;

    [nsapp stopModal];
}

- (void)setupRunMode
{
    getvalidmodes();

    [fullscreenButton setState: (settings.fullscreen ? NSOnState : NSOffState)];
    [alwaysShowButton setState: (settings.forcesetup ? NSOnState : NSOffState)];
    [self populateVideoModes:YES];
    [self populateSoundQuality:YES];

    // enable all the controls on the Configuration page
    NSEnumerator *enumerator = [[[[tabView tabViewItemAtIndex:0] view] subviews] objectEnumerator];
    NSControl *control;
    while ((control = [enumerator nextObject])) [control setEnabled:true];

    gamelistsrc = [[GameListSource alloc] init];
    [[gameList documentView] setDataSource:gamelistsrc];
    [[gameList documentView] deselectAll:nil];

    int row = [gamelistsrc findIndexForGrpname:[NSString stringWithCString:settings.grp->filename encoding:NSUTF8StringEncoding]];
    if (row >= 0) {
        [[gameList documentView] scrollRowToVisible:row];
#if defined(MAC_OS_X_VERSION_10_3) && (MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_3)
        [[gameList documentView] selectRowIndexes:[NSIndexSet indexSetWithIndex:row] byExtendingSelection:NO];
#else
        [[gameList documentView] selectRow:row byExtendingSelection:NO];
#endif
    }

    [cancelButton setEnabled:true];
    [startButton setEnabled:true];

    [tabView selectTabViewItemAtIndex:0];
    [NSCursor unhide]; // Why should I need to do this?
}

- (void)setupMessagesMode
{
    [tabView selectTabViewItemAtIndex:2];

    // disable all the controls on the Configuration page except "always show", so the
    // user can enable it if they want to while waiting for something else to happen
    NSEnumerator *enumerator = [[[[tabView tabViewItemAtIndex:0] view] subviews] objectEnumerator];
    NSControl *control;
    while ((control = [enumerator nextObject])) {
        if (control == alwaysShowButton) continue;
        [control setEnabled:false];
    }

    [cancelButton setEnabled:false];
    [startButton setEnabled:false];
}

- (void)putsMessage:(NSString *)str
{
    NSRange end;
    NSTextStorage *text = [messagesView textStorage];
    BOOL shouldAutoScroll;

    shouldAutoScroll = ((int)NSMaxY([messagesView bounds]) == (int)NSMaxY([messagesView visibleRect]));

    end.location = [text length];
    end.length = 0;

    [text beginEditing];
    [messagesView replaceCharactersInRange:end withString:str];
    [text endEditing];

    if (shouldAutoScroll) {
        end.location = [text length];
        end.length = 0;
        [messagesView scrollRangeToVisible:end];
    }
}

- (void)setTitle:(NSString *)str
{
    [[self window] setTitle:str];
}

@end

static StartupWinController *startwin = nil;

int startwin_open(void)
{
    // fix for "ld: absolute address to symbol _NSApp in a different linkage unit not supported"
    // (OS X 10.6) when building for PPC
    nsapp = [NSApplication sharedApplication];

    if (startwin != nil) return 1;

    startwin = [[StartupWinController alloc] initWithWindowNibName:@"startwin.game"];
    if (startwin == nil) return -1;

    {
        static int soundQualityFrequencies[] = { 48000, 44100, 32000, 24000, 22050 };
        static int soundQualitySampleSizes[] = { 16, 8 };
        static int soundQualityChannels[]    = { 2, 1 };
        size_t f, b, c, i;

        i = sizeof(soundQualityFrequencies) *
            sizeof(soundQualitySampleSizes) *
            sizeof(soundQualityChannels) /
            sizeof(int) + 2;    // one for the terminator, one for a custom setting
        soundQualities = (struct soundQuality_t *) malloc(i * sizeof(struct soundQuality_t));

        i = 0;
        for (c = 0; c < sizeof(soundQualityChannels) / sizeof(int); c++) {
            for (b = 0; b < sizeof(soundQualitySampleSizes) / sizeof(int); b++) {
                for (f = 0; f < sizeof(soundQualityFrequencies) / sizeof(int); f++) {
                    soundQualities[i].frequency = soundQualityFrequencies[f];
                    soundQualities[i].samplesize = soundQualitySampleSizes[b];
                    soundQualities[i].channels = soundQualityChannels[c];

                    i++;
                }
            }
        }

        soundQualities[i].frequency = -1;
    }

    [startwin setupMessagesMode];
    [startwin showWindow:nil];

    return 0;
}

int startwin_close(void)
{
    if (startwin == nil) return 1;

    [startwin close];
    [startwin release];
    startwin = nil;

    free(soundQualities);

    return 0;
}

int startwin_puts(const char *s)
{
    NSString *ns;

    if (!s) return -1;
    if (startwin == nil) return 1;

    ns = [[NSString alloc] initWithUTF8String:s];
    [startwin putsMessage:ns];
    [ns release];

    return 0;
}

int startwin_settitle(const char *s)
{
    NSString *ns;

    if (!s) return -1;
    if (startwin == nil) return 1;

    ns = [[NSString alloc] initWithUTF8String:s];
    [startwin setTitle:ns];
    [ns release];

    return 0;
}

int startwin_idle(void *v)
{
    UNREFERENCED_PARAMETER(v);

    if (startwin) [[startwin window] displayIfNeeded];
    return 0;
}


int startwin_run(void)
{
    int retval;

    if (startwin == nil) return 0;

    settings.fullscreen = ud.config.ScreenMode;
    settings.xdim3d = ud.config.ScreenWidth;
    settings.ydim3d = ud.config.ScreenHeight;
    settings.bpp3d = ud.config.ScreenBPP;
    settings.samplerate = ud.config.MixRate;
    settings.bitspersample = ud.config.NumBits;
    settings.channels = ud.config.NumChannels;
    settings.forcesetup = ud.config.ForceSetup;
    settings.grp = g_selectedGrp;

    [startwin setupRunMode];

    switch ([nsapp runModalForWindow:[startwin window]]) {
#ifdef MAC_OS_X_VERSION_10_9
        case NSModalResponseStop: retval = 1; break;
        case NSModalResponseAbort: retval = 0; break;
#else
        case NSRunStoppedResponse: retval = 1; break;
        case NSRunAbortedResponse: retval = 0; break;
#endif
        default: retval = -1;
    }

    [startwin setupMessagesMode];

    if (retval) {
        ud.config.ScreenMode = settings.fullscreen;
        ud.config.ScreenWidth = settings.xdim3d;
        ud.config.ScreenHeight = settings.ydim3d;
        ud.config.ScreenBPP = settings.bpp3d;
        ud.config.MixRate = settings.samplerate;
        ud.config.NumBits = settings.bitspersample;
        ud.config.NumChannels = settings.channels;
        ud.config.ForceSetup = settings.forcesetup;
        g_selectedGrp = settings.grp;
    }

    return retval;
}
