/**

 * $Id$

 *

 * Implementation of the SEGA lightgun device

 * Part No. HKT-7800

 *

 * Copyright (c) 2008 Nathan Keynes.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */

#include <stdlib.h>

#include <stdio.h>

#include <string.h>

#include <assert.h>

#include "display.h"

#include "eventq.h"

#include "pvr2/pvr2.h"

#include "maple/maple.h"

#define BUTTON_B            0x00000002

#define BUTTON_A            0x00000004

#define BUTTON_START        0x00000008

#define BUTTON_DPAD_UP      0x00000010

#define BUTTON_DPAD_DOWN    0x00000020

#define BUTTON_DPAD_LEFT    0x00000040

#define BUTTON_DPAD_RIGHT   0x00000080

#define LIGHTGUN_IDENT {     0x00, 0x00, 0x00, 0x81,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0xFE, \

	0x00, 0x00, 0x00, 0x00,  0xFF, 0x01, 0x44, 0x72,  0x65, 0x61, 0x6D, 0x63,  0x61, 0x73, 0x74, 0x20, \

	0x47, 0x75, 0x6E, 0x20,  0x20, 0x20, 0x20, 0x20,  0x20, 0x20, 0x20, 0x20,  0x20, 0x20, 0x20, 0x20, \

	0x20, 0x20, 0x20, 0x20,  0x50, 0x72, 0x6F, 0x64,  0x75, 0x63, 0x65, 0x64,  0x20, 0x42, 0x79, 0x20, \

	0x6F, 0x72, 0x20, 0x55,  0x6E, 0x64, 0x65, 0x72,  0x20, 0x4C, 0x69, 0x63,  0x65, 0x6E, 0x73, 0x65, \

	0x20, 0x46, 0x72, 0x6F,  0x6D, 0x20, 0x53, 0x45,  0x47, 0x41, 0x20, 0x45,  0x4E, 0x54, 0x45, 0x52, \

	0x50, 0x52, 0x49, 0x53,  0x45, 0x53, 0x2C, 0x4C,  0x54, 0x44, 0x2E, 0x20,  0x20, 0x20, 0x20, 0x20, \

	0xDC, 0x00, 0x2C, 0x01 }

#define LIGHTGUN_VERSION {   0x56, 0x65, 0x72, 0x73,  0x69, 0x6F, 0x6E, 0x20,  0x31, 0x2E, 0x30, 0x30, \

	0x30, 0x2C, 0x31, 0x39,  0x39, 0x38, 0x2F, 0x30,  0x39, 0x2F, 0x31, 0x36,  0x2C, 0x33, 0x31, 0x35, \

	0x2D, 0x36, 0x31, 0x32,  0x35, 0x2D, 0x41, 0x47,  0x20, 0x20, 0x20, 0x2C,  0x55, 0x2C, 0x44, 0x2C, \

	0x4C, 0x2C, 0x52, 0x2C,  0x53, 0x2C, 0x41, 0x2C,  0x42, 0x20, 0x4B, 0x65,  0x79, 0x20, 0x26, 0x20, \

	0x53, 0x63, 0x61, 0x6E,  0x6E, 0x69, 0x6E, 0x67,  0x20, 0x4C, 0x69, 0x6E,  0x65, 0x20, 0x41, 0x6D, \

	0x70, 0x2E, 0x20, 0x20 }                                       

#define LIGHTGUN_CONFIG_ENTRIES 7

static void lightgun_attach( maple_device_t dev );

static void lightgun_detach( maple_device_t dev );

static void lightgun_destroy( maple_device_t dev );

static maple_device_t lightgun_clone( maple_device_t dev );

static maple_device_t lightgun_new();

static lxdream_config_entry_t lightgun_get_config( maple_device_t dev );

static void lightgun_set_config_value( maple_device_t dev, unsigned int key, const gchar *value );

static int lightgun_get_cond( maple_device_t dev, int function, unsigned char *outbuf,

                         unsigned int *outlen );

static void lightgun_start_gun( maple_device_t dev );

static void lightgun_stop_gun( maple_device_t dev );

typedef struct lightgun_device {

    struct maple_device dev;

    uint32_t condition[2];

    int gun_active;

    int mouse_x, mouse_y;

    struct lxdream_config_entry config[LIGHTGUN_CONFIG_ENTRIES+1];

} *lightgun_device_t;

struct maple_device_class lightgun_class = { "Sega Lightgun", lightgun_new };

static struct lightgun_device base_lightgun = {

        { MAPLE_DEVICE_TAG, &lightgun_class, MAPLE_GRAB_NO,

          LIGHTGUN_IDENT, LIGHTGUN_VERSION, 

          lightgun_get_config, lightgun_set_config_value, 

          lightgun_attach, lightgun_detach, lightgun_destroy,

          lightgun_clone, NULL, NULL, lightgun_get_cond, NULL, NULL, NULL,

          lightgun_start_gun, lightgun_stop_gun},

          {0x0000FFFF, 0x80808080}, 0, -1, -1, 

          {{ "dpad left", N_("Dpad left"), CONFIG_TYPE_KEY },

           { "dpad right", N_("Dpad right"), CONFIG_TYPE_KEY },

           { "dpad up", N_("Dpad up"), CONFIG_TYPE_KEY },

           { "dpad down", N_("Dpad down"), CONFIG_TYPE_KEY },

           { "button A", N_("Button A"), CONFIG_TYPE_KEY },

           { "button B", N_("Button B"), CONFIG_TYPE_KEY },

           { "start", N_("Start button"), CONFIG_TYPE_KEY },

           { NULL, CONFIG_TYPE_NONE }} };

static int config_button_map[] = { 

        BUTTON_DPAD_LEFT, BUTTON_DPAD_RIGHT, BUTTON_DPAD_UP, BUTTON_DPAD_DOWN,

        BUTTON_A, BUTTON_B, BUTTON_START };

#define lightgun(x) ((lightgun_device_t)(x))

static maple_device_t lightgun_new( )

{

    lightgun_device_t dev = malloc( sizeof(struct lightgun_device) );

    memcpy( dev, &base_lightgun, sizeof(base_lightgun) );

    return MAPLE_DEVICE(dev);

}

static maple_device_t lightgun_clone( maple_device_t srcdevice )

{

    lightgun_device_t src = (lightgun_device_t)srcdevice;

    lightgun_device_t dev = (lightgun_device_t)lightgun_new();

    lxdream_copy_config_list( dev->config, src->config );

    memcpy( dev->condition, src->condition, sizeof(src->condition) );

    return MAPLE_DEVICE(dev);

}

/**

 * Input callback 

 */

static void lightgun_key_callback( void *mdev, uint32_t value, uint32_t pressure, gboolean isKeyDown )

{

    lightgun_device_t dev = (lightgun_device_t)mdev;

    if( isKeyDown ) {

        dev->condition[0] &= ~value;

    } else {

        dev->condition[0] |= value;

    }

}

static lxdream_config_entry_t lightgun_get_config( maple_device_t mdev )

{

    lightgun_device_t dev = (lightgun_device_t)mdev;

    return dev->config;

}

static void lightgun_set_config_value( maple_device_t mdev, unsigned int key, const gchar *value )

{

    lightgun_device_t dev = (lightgun_device_t)mdev;

    assert( key < LIGHTGUN_CONFIG_ENTRIES );

    input_unregister_key( dev->config[key].value, lightgun_key_callback, dev, config_button_map[key] );

    lxdream_set_config_value( &dev->config[key], value );

    input_register_key( dev->config[key].value, lightgun_key_callback, dev, config_button_map[key] );

}

static void lightgun_destroy( maple_device_t mdev )

{

    free( mdev );

}

static void lightgun_mouse_callback( void *mdev, uint32_t buttons, int32_t x, int32_t y, gboolean absolute )

{

    lightgun_device_t dev = (lightgun_device_t)mdev;

    if( absolute ) {

        dev->mouse_x = x;

        dev->mouse_y = y;

        if( dev->gun_active ) {

            pvr2_queue_gun_event( x, y );

            dev->gun_active = FALSE;

        }

    }

}

/**

 * Device is being attached to the bus. Go through the config and reserve the

 * keys we need.

 */

static void lightgun_attach( maple_device_t mdev )

{

    lightgun_device_t dev = (lightgun_device_t)mdev;

    int i;

    for( i=0; i<LIGHTGUN_CONFIG_ENTRIES; i++ ) {

        input_register_key( dev->config[i].value, lightgun_key_callback, dev, config_button_map[i] );

    }

    input_register_mouse_hook( TRUE, lightgun_mouse_callback, dev );

}

static void lightgun_detach( maple_device_t mdev )

{

    lightgun_device_t dev = (lightgun_device_t)mdev;

    int i;

    for( i=0; i<LIGHTGUN_CONFIG_ENTRIES; i++ ) {

        input_unregister_key( dev->config[i].value, lightgun_key_callback, dev, config_button_map[i] );

    }

    input_unregister_mouse_hook( lightgun_mouse_callback, dev );

}

static int lightgun_get_cond( maple_device_t mdev, int function, unsigned char *outbuf,

                         unsigned int *outlen )

{

    lightgun_device_t dev = (lightgun_device_t)mdev;

    if( function == MAPLE_FUNC_CONTROLLER ) {

        *outlen = 2;

        memcpy( outbuf, dev->condition, 8 );

        return 0;

    } else {

        return MAPLE_ERR_FUNC_UNSUP;

    }

}

static void lightgun_start_gun( maple_device_t mdev )

{

    lightgun_device_t dev = (lightgun_device_t)mdev;

    if( dev->mouse_x != -1 && dev->mouse_y != -1 ) {

        pvr2_queue_gun_event( dev->mouse_x, dev->mouse_y );

    } else {

        // Wait for a mouse event

        dev->gun_active = 1;

    }

}

static void lightgun_stop_gun( maple_device_t mdev )

{

    lightgun_device_t dev = (lightgun_device_t)mdev;

    dev->gun_active = 0;

    event_cancel( EVENT_GUNPOS );

}