/*

     File: AutoPilotHelicopter.m

 Abstract: AutoPilotHelicopter, a subclass of Helicopter. One of the interesting subclasses of GamePiece, implementing the demo helicopter.

  Version: 1.0

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#import "AutoPilotHelicopter.h"

#import "Background.h"

#import "Helicopter.h"

#import "Game.h"

enum {

     AUTOPILOTSTARTTIME = 2000,     /* ms */

     AUTOPILOTTAKEOVERTIME = 4000,  /* ms */

     AUTOPILOTHELICOPTERSPEED = (MAXVELX * 3) / 4

};

@implementation AutoPilotHelicopter

- (id)initInGame:(Game *)g {

    if (!(self = [super initInGame:g])) return nil;

    autopilotTakeoverTime = [game updateTime] + AUTOPILOTSTARTTIME;

    return self;

}

- (void)setCommand:(NSInteger)cmd {

    autopilot = NO;

    autopilotTakeoverTime = [game updateTime] + AUTOPILOTTAKEOVERTIME;

    [super setCommand:cmd];

}

- (void)startFiring {

    autopilot = NO;

    autopilotTakeoverTime = [game updateTime] + AUTOPILOTTAKEOVERTIME * 10;

    [super startFiring];

}

- (void)stopFiring {

    autopilot = NO;

    autopilotTakeoverTime = [game updateTime] + AUTOPILOTTAKEOVERTIME;

    [super stopFiring];

}

- (BOOL)fireRequested {

    if (autopilot) {

    return [Game oneIn:50];

    } else {

    return [super fireRequested];

    }

}

- (void)updatePiece {

    if (!autopilot && [game updateTime] >= autopilotTakeoverTime) {

    autopilot = YES;

        [game markGameAsRunning];

        [self setVelocity:NSMakeSize(AUTOPILOTHELICOPTERSPEED, 0.0)];

    [self setAcceleration:NSMakeSize(0.0, 0.0)];

    }

    [super updatePiece];

    // Prevent a crash...

    NSRect rect = [[game background] clearRectFrom:pos.origin.x to:NSMaxX(pos) + 4.0];

    if (NSMaxY(pos) >= NSMaxY(rect)) {  // Oops, need to adjust

        [self setLocation:NSMakePoint(pos.origin.x, NSMaxY(rect) - pos.size.height - 1.0)];

    } else if (pos.origin.y <= rect.origin.y) { // Oops, need to adjust

        [self setLocation:NSMakePoint(pos.origin.x, rect.origin.y + 1.0)];

    } else {

        rect = [[game background] clearRectFrom:pos.origin.x to:NSMaxX(pos) + 20.0f];

        if (NSMaxY(pos) >= NSMaxY(rect) - 2.0) {    // Oops, need to adjust

            [self setLocation:NSMakePoint(pos.origin.x, pos.origin.y - 1.0)];

        } else if (pos.origin.y < rect.origin.y + 2.0) {    // Oops, need to adjust

            [self setLocation:NSMakePoint(pos.origin.x, pos.origin.y + 1.0)];

        } else if (!autopilot && [Game oneIn:100]) {

            [self setLocation:NSMakePoint(pos.origin.x, pos.origin.y + [Game randInt:2] - 1.0)];    // random drift

        }

    }

}

@end