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/*
 * Copyright (C) 2006 Josef Cejka
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


#include <kbd.h>
#include <fb.h>
#include <ipc/ipc.h>
#include <ipc/fb.h>
#include <ipc/services.h>
#include <errno.h>
#include <key_buffer.h>
#include <console.h>
#include <unistd.h>
#include <async.h>

//#define CONSOLE_COUNT VFB_CONNECTIONS
#define CONSOLE_COUNT 6

#define NAME "CONSOLE"

int active_client = 0;


typedef struct {
    keybuffer_t keybuffer;
    int client_phone;
    int vfb_number; /* Not used */
    int vfb_phone;
    int used;
} connection_t;

connection_t connections[CONSOLE_COUNT];

static int find_free_connection() 
{
    int i = 0;
    
    while (i < CONSOLE_COUNT) {
        if (connections[i].used == 0)
            return i;
        ++i;
    }
    return CONSOLE_COUNT;
}


static int find_connection(int client_phone) 
{
    int i = 0;
    
    while (i < CONSOLE_COUNT) {
        if (connections[i].client_phone == client_phone)
            return i;
        ++i;
    }
    return  CONSOLE_COUNT;
}

/* Handler for keyboard */
static void keyboard_events(ipc_callid_t iid, ipc_call_t *icall)
{
    ipc_callid_t callid;
    ipc_call_t call;
    int retval;
    int i;

    /* Ignore parameters, the connection is alread opened */
    while (1) {
        callid = async_get_call(&call);
        switch (IPC_GET_METHOD(call)) {
        case IPC_M_PHONE_HUNGUP:
            ipc_answer_fast(callid,0,0,0);
            /* TODO: Handle hangup */
            return;
        case KBD_PUSHCHAR:
            /* got key from keyboard driver */
            /* find active console */
            /* if client is awaiting key, send it */
            /*FIXME: else store key to its buffer */
            retval = 0;
            i = IPC_GET_ARG1(call) & 0xff;
            /* switch to another virtual console */
            if ((i >= KBD_KEY_F1) && (i < KBD_KEY_F1 + CONSOLE_COUNT)) {
                active_client = i - KBD_KEY_F1;
                break;
            }
            keybuffer_push(&(connections[active_client].keybuffer), i);
            /* Send it to first FB, DEBUG */
//          ipc_call_async_2(connections[0].vfb_phone, FB_PUTCHAR, 0, IPC_GET_ARG1(call),NULL,NULL);
            ipc_call_sync_2(connections[0].vfb_phone, FB_PUTCHAR, 0, IPC_GET_ARG1(call),NULL,NULL);

            break;
        default:
            retval = ENOENT;
        }       
        ipc_answer_fast(callid, retval, 0, 0);
    }
}

/** Default thread for new connections */
void client_connection(ipc_callid_t iid, ipc_call_t *icall)
{
    ipc_callid_t callid;
    ipc_call_t call;
    int consnum;
    ipcarg_t arg1;

    if ((consnum = find_free_connection()) == CONSOLE_COUNT) {
        ipc_answer_fast(iid,ELIMIT,0,0);
        return;
    }
    connections[consnum].used = 1;
    connections[consnum].client_phone = IPC_GET_ARG3(call);

    /* Accept the connection */
    ipc_answer_fast(iid,0,0,0);
    
    while (1) {
        callid = async_get_call(&call);
        switch (IPC_GET_METHOD(call)) {
        case IPC_M_PHONE_HUNGUP:
            /* TODO */
            ipc_answer_fast(callid, 0,0,0);
            return;
        case CONSOLE_PUTCHAR:
            /* TODO: send message to fb */
            ipc_call_async_2(connections[consnum].vfb_phone, FB_PUTCHAR, IPC_GET_ARG1(call), IPC_GET_ARG2(call), NULL, NULL); 
            break;
        case CONSOLE_GETCHAR:
            /* FIXME: */
            if (!keybuffer_pop(&(connections[active_client].keybuffer), (char *)&arg1)) {
                /* FIXME: buffer empty -> store request */
                arg1 = 'X'; /* Only temporary */
            };
//ipc_call_async_2(connections[active_client].vfb_phone, FB_PUTCHAR, ' ', arg1, NULL, (void *)NULL); 
            break;
        }
        ipc_answer_fast(callid, 0,0,0);
    }
}

int main(int argc, char *argv[])
{
    ipcarg_t phonehash;
    int kbd_phone, fb_phone;
    ipcarg_t retval, arg1 = 0xdead, arg2 = 0xbeef;
    int i;
    
    /* Connect to keyboard driver */

    while ((kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0)) < 0) {
        usleep(10000);
    };
    
    if (ipc_connect_to_me(kbd_phone, SERVICE_CONSOLE, 0, &phonehash) != 0) {
        return -1;
    };
    async_new_connection(phonehash, 0, NULL, keyboard_events);

    /* Connect to framebuffer driver */
    
    for (i = 0; i < CONSOLE_COUNT; i++) {
        connections[i].used = 0;
        keybuffer_init(&(connections[i].keybuffer));
        /* TODO: init key_buffer */
        while ((connections[i].vfb_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0)) < 0) {
                
            ipc_call_async_2(connections[i].vfb_phone, FB_PUTCHAR, 'a', 'b', NULL, (void *)NULL); 
        }
    }
    
    if (ipc_connect_to_me(PHONE_NS, SERVICE_CONSOLE, 0, &phonehash) != 0) {
        return -1;
    };
    
    async_manager();

    return 0;   
}