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/*
 * Copyright (C) 2006 Ondrej Palkovsky
 * 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.
 */

/** @addtogroup console
 * @{ 
 */
/** @file
 */

#include <ipc/fb.h>
#include <ipc/ipc.h>
#include <async.h>
#include <stdio.h>
#include <sys/mman.h>
#include <string.h>
#include <align.h>

#include "console.h"
#include "gcons.h"

#define CONSOLE_TOP      66
#define CONSOLE_MARGIN   6

#define STATUS_START    110
#define STATUS_TOP      8
#define STATUS_SPACE    4
#define STATUS_WIDTH    48
#define STATUS_HEIGHT   48

#define MAIN_COLOR      0xffffff

static int use_gcons = 0;
static ipcarg_t xres,yres;

enum butstate {
    CONS_DISCONNECTED = 0,
    CONS_SELECTED,
    CONS_IDLE,
    CONS_HAS_DATA,
    CONS_KERNEL,
    CONS_DISCONNECTED_SEL,
    CONS_LAST
};

static int console_vp;
static int cstatus_vp[CONSOLE_COUNT];
static int cstat_row, cstat_col; /* Size of cstatus buttons */
static enum butstate console_state[CONSOLE_COUNT];

static int fbphone;

/** List of pixmaps identifying these icons */
static int ic_pixmaps[CONS_LAST] = {-1,-1,-1,-1,-1,-1};
static int animation = -1;

static int active_console = 0;

static void vp_switch(int vp)
{
    async_msg(fbphone,FB_VIEWPORT_SWITCH, vp);
}

/** Create view port */
static int vp_create(unsigned int x, unsigned int y, 
             unsigned int width, unsigned int height)
{
    return async_req_2(fbphone, FB_VIEWPORT_CREATE,
               (x << 16) | y, (width << 16) | height,
               NULL, NULL);
}

static void clear(void)
{
    async_msg(fbphone, FB_CLEAR, 0);
    
}

static void set_style(int fgcolor, int bgcolor)
{
    async_msg_2(fbphone, FB_SET_STYLE, fgcolor, bgcolor);
}

/** Transparent putchar */
static void tran_putch(char c, int row, int col)
{
    async_msg_3(fbphone, FB_TRANS_PUTCHAR, c, row, col);
}

/** Redraw the button showing state of a given console */
static void redraw_state(int consnum)
{
    char data[5];
    int i;
    enum butstate state = console_state[consnum];

    vp_switch(cstatus_vp[consnum]);
    if (ic_pixmaps[state] != -1)
        async_msg_2(fbphone, FB_VP_DRAW_PIXMAP, cstatus_vp[consnum], ic_pixmaps[state]);

    if (state != CONS_DISCONNECTED && state != CONS_KERNEL && state != CONS_DISCONNECTED_SEL) {
        snprintf(data, 5, "%d", consnum+1);
        for (i=0;data[i];i++)
            tran_putch(data[i], 1, 2+i);
    }
}

/** Notification run on changing console (except kernel console) */
void gcons_change_console(int consnum)
{
    int i;

    if (!use_gcons)
        return;

    if (active_console == KERNEL_CONSOLE) {
        for (i=0; i < CONSOLE_COUNT; i++)
            redraw_state(i);
        if (animation != -1)
            async_msg(fbphone, FB_ANIM_START, animation);
    } else {
        if (console_state[active_console] == CONS_DISCONNECTED_SEL)
            console_state[active_console] = CONS_DISCONNECTED;
        else
            console_state[active_console] = CONS_IDLE;
        redraw_state(active_console);
    }
    active_console = consnum;

    if (console_state[consnum] == CONS_DISCONNECTED) {
        console_state[consnum] = CONS_DISCONNECTED_SEL;
        redraw_state(consnum);
    } else
        console_state[consnum] = CONS_SELECTED;
    redraw_state(consnum);

    vp_switch(console_vp);
}

/** Notification function that gets called on new output to virtual console */
void gcons_notify_char(int consnum)
{
    if (!use_gcons)
        return;

    if (consnum == active_console || console_state[consnum] == CONS_HAS_DATA)
        return;

    console_state[consnum] = CONS_HAS_DATA;

    if (active_console == KERNEL_CONSOLE)
        return;

    redraw_state(consnum);
    
    vp_switch(console_vp);
}

/** Notification function called on service disconnect from console */
void gcons_notify_disconnect(int consnum)
{
    if (!use_gcons)
        return;
    if (active_console == consnum)
        console_state[consnum] = CONS_DISCONNECTED_SEL;
    else
        console_state[consnum] = CONS_DISCONNECTED;

    if (active_console == KERNEL_CONSOLE)
        return;

    redraw_state(consnum);
    vp_switch(console_vp);
}

/** Notification function called on console connect */
void gcons_notify_connect(int consnum)
{
    if (!use_gcons)
        return;
    if (active_console == consnum)
        console_state[consnum] = CONS_SELECTED;
    else
        console_state[consnum] = CONS_IDLE;

    if (active_console == KERNEL_CONSOLE)
        return;

    redraw_state(consnum);
    vp_switch(console_vp);
}

/** Change to kernel console */
void gcons_in_kernel(void)
{
    if (console_state[active_console] == CONS_DISCONNECTED_SEL)
        console_state[active_console] = CONS_DISCONNECTED;
    else
        console_state[active_console] = CONS_IDLE;
    redraw_state(active_console);

    if (animation != -1)
        async_msg(fbphone, FB_ANIM_STOP, animation);

    active_console = KERNEL_CONSOLE; /* Set to kernel console */
    vp_switch(0);
}


static inline int limit(int a,int left, int right)
{
    if (a < left)
        a = left;
    if (a >= right)
        a = right - 1;
    return a;
}

int mouse_x, mouse_y;
int btn_pressed, btn_x, btn_y;

/** Handle mouse move
 *
 * @param dx Delta X of mouse move
 * @param dy Delta Y of mouse move
 */
void gcons_mouse_move(int dx, int dy)
{
    mouse_x = limit(mouse_x+dx, 0, xres);
    mouse_y = limit(mouse_y+dy, 0, yres);

    async_msg_2(fbphone, FB_POINTER_MOVE, mouse_x, mouse_y);
}

static int gcons_find_conbut(int x, int y)
{
    int status_start = STATUS_START + (xres-800) / 2;;

    if (y < STATUS_TOP || y >= STATUS_TOP+STATUS_HEIGHT)
        return -1;
    
    if (x < status_start)
        return -1;
    
    if (x >= status_start + (STATUS_WIDTH+STATUS_SPACE)*CONSOLE_COUNT)
        return -1;
    if (((x - status_start) % (STATUS_WIDTH+STATUS_SPACE)) >= STATUS_WIDTH)
        return -1;
    
    return (x-status_start) / (STATUS_WIDTH+STATUS_SPACE);
}

/** Handle mouse click
 *
 * @param state New state (1-pressed, 0-depressed)
 */
int gcons_mouse_btn(int state)
{
    int conbut;

    if (state) {
        conbut = gcons_find_conbut(mouse_x, mouse_y);
        if (conbut != -1) {
            btn_pressed = 1;
            btn_x = mouse_x;
            btn_y = mouse_y;
        }
        return -1;
    } 
    if (!state && !btn_pressed)
        return -1;
    btn_pressed = 0;

    conbut = gcons_find_conbut(mouse_x, mouse_y);
    if (conbut == gcons_find_conbut(btn_x, btn_y))
        return conbut;
    return -1;
}


/** Draw a PPM pixmap to framebuffer
 *
 * @param logo Pointer to PPM data
 * @param size Size of PPM data
 * @param x Coordinate of upper left corner
 * @param y Coordinate of upper left corner
 */
static void draw_pixmap(char *logo, size_t size, int x, int y)
{
    char *shm;
    int rc;

    /* Create area */
    shm = mmap(NULL, size, PROTO_READ | PROTO_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0);
    if (shm == MAP_FAILED)
        return;

    memcpy(shm, logo, size);
    /* Send area */
    rc = async_req_2(fbphone, FB_PREPARE_SHM, (ipcarg_t)shm, 0, NULL, NULL);
    if (rc)
        goto exit;
    rc = async_req_3(fbphone, IPC_M_AS_AREA_SEND, (ipcarg_t)shm, 0, PROTO_READ, NULL, NULL, NULL);
    if (rc)
        goto drop;
    /* Draw logo */
    async_msg_2(fbphone, FB_DRAW_PPM, x, y);
drop:
    /* Drop area */
    async_msg(fbphone, FB_DROP_SHM, 0);
exit:       
    /* Remove area */
    munmap(shm, size);
}

extern char _binary_helenos_ppm_start[0];
extern int _binary_helenos_ppm_size;
extern char _binary_nameic_ppm_start[0];
extern int _binary_nameic_ppm_size;
/** Redraws console graphics  */
static void gcons_redraw_console(void)
{
    int i;
    size_t hsize = (size_t)&_binary_helenos_ppm_size;

    if (!use_gcons)
        return;
    
    vp_switch(0);
    set_style(MAIN_COLOR, MAIN_COLOR);
    clear();
    draw_pixmap(_binary_helenos_ppm_start, (size_t)&_binary_helenos_ppm_size, xres-66, 2);
    draw_pixmap(_binary_nameic_ppm_start, (size_t)&_binary_nameic_ppm_size, 5, 17);

    for (i=0;i < CONSOLE_COUNT; i++) 
        redraw_state(i);
    vp_switch(console_vp);
}

/** Creates a pixmap on framebuffer
 *
 * @param data PPM data
 * @param size PPM data size
 * @return Pixmap identification
 */
static int make_pixmap(char *data, int size)
{
    char *shm;
    int rc;
    int pxid = -1;

    /* Create area */
    shm = mmap(NULL, size, PROTO_READ | PROTO_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0);
    if (shm == MAP_FAILED)
        return -1;

    memcpy(shm, data, size);
    /* Send area */
    rc = async_req_2(fbphone, FB_PREPARE_SHM, (ipcarg_t)shm, 0, NULL, NULL);
    if (rc)
        goto exit;
    rc = async_req_3(fbphone, IPC_M_AS_AREA_SEND, (ipcarg_t)shm, 0, PROTO_READ, NULL, NULL, NULL);
    if (rc)
        goto drop;

    /* Obtain pixmap */
    rc = async_req(fbphone, FB_SHM2PIXMAP, 0, NULL);
    if (rc < 0)
        goto drop;
    pxid = rc;
drop:
    /* Drop area */
    async_msg(fbphone, FB_DROP_SHM, 0);
exit:       
    /* Remove area */
    munmap(shm, size);

    return pxid;
}

extern char _binary_anim_1_ppm_start[0];
extern int _binary_anim_1_ppm_size;
extern char _binary_anim_2_ppm_start[0];
extern int _binary_anim_2_ppm_size;
extern char _binary_anim_3_ppm_start[0];
extern int _binary_anim_3_ppm_size;
extern char _binary_anim_4_ppm_start[0];
extern int _binary_anim_4_ppm_size;
static void make_anim(void)
{
    int an;
    int pm;

    an = async_req(fbphone, FB_ANIM_CREATE, cstatus_vp[KERNEL_CONSOLE], NULL);
    if (an < 0)
        return;

    pm = make_pixmap(_binary_anim_1_ppm_start, (int)&_binary_anim_1_ppm_size);
    async_msg_2(fbphone, FB_ANIM_ADDPIXMAP, an, pm);

    pm = make_pixmap(_binary_anim_2_ppm_start, (int)&_binary_anim_2_ppm_size);
    async_msg_2(fbphone, FB_ANIM_ADDPIXMAP, an, pm);

    pm = make_pixmap(_binary_anim_3_ppm_start, (int)&_binary_anim_3_ppm_size);
    async_msg_2(fbphone, FB_ANIM_ADDPIXMAP, an, pm);

    pm = make_pixmap(_binary_anim_4_ppm_start, (int)&_binary_anim_4_ppm_size);
    async_msg_2(fbphone, FB_ANIM_ADDPIXMAP, an, pm);

    async_msg(fbphone, FB_ANIM_START, an);

    animation = an;
}

extern char _binary_cons_selected_ppm_start[0];
extern int _binary_cons_selected_ppm_size;
extern char _binary_cons_idle_ppm_start[0];
extern int _binary_cons_idle_ppm_size;
extern char _binary_cons_has_data_ppm_start[0];
extern int _binary_cons_has_data_ppm_size;
extern char _binary_cons_kernel_ppm_start[0];
extern int _binary_cons_kernel_ppm_size;
/** Initialize nice graphical console environment */
void gcons_init(int phone)
{
    int rc;
    int i;
    int status_start = STATUS_START;

    fbphone = phone;

    rc = async_req_2(phone, FB_GET_RESOLUTION, 0, 0, &xres, &yres);
    if (rc)
        return;
    
    if (xres < 800 || yres < 600)
        return;

    /* create console viewport */
    /* Align width & height to character size */
    console_vp = vp_create(CONSOLE_MARGIN, CONSOLE_TOP, 
                   ALIGN_DOWN(xres-2*CONSOLE_MARGIN, 8),
                   ALIGN_DOWN(yres-(CONSOLE_TOP+CONSOLE_MARGIN),16));
    if (console_vp < 0)
        return;
    
    /* Create status buttons */
    status_start += (xres-800) / 2;
    for (i=0; i < CONSOLE_COUNT; i++) {
        cstatus_vp[i] = vp_create(status_start+CONSOLE_MARGIN+i*(STATUS_WIDTH+STATUS_SPACE),
                      STATUS_TOP, STATUS_WIDTH, STATUS_HEIGHT);
        if (cstatus_vp[i] < 0)
            return;
        vp_switch(cstatus_vp[i]);
        set_style(0x202020, 0xffffff);
    }
    
    /* Initialize icons */
    ic_pixmaps[CONS_SELECTED] = make_pixmap(_binary_cons_selected_ppm_start,
                          (int)&_binary_cons_selected_ppm_size);
    ic_pixmaps[CONS_IDLE] = make_pixmap(_binary_cons_idle_ppm_start,
                          (int)&_binary_cons_idle_ppm_size);
    ic_pixmaps[CONS_HAS_DATA] = make_pixmap(_binary_cons_has_data_ppm_start,
                        (int)&_binary_cons_has_data_ppm_size);
    ic_pixmaps[CONS_DISCONNECTED] = make_pixmap(_binary_cons_idle_ppm_start,
                          (int)&_binary_cons_idle_ppm_size);
    ic_pixmaps[CONS_KERNEL] = make_pixmap(_binary_cons_kernel_ppm_start,
                          (int)&_binary_cons_kernel_ppm_size);
    ic_pixmaps[CONS_DISCONNECTED_SEL] = ic_pixmaps[CONS_SELECTED];
    
    make_anim();

    use_gcons = 1;
    console_state[0] = CONS_DISCONNECTED_SEL;
    console_state[KERNEL_CONSOLE] = CONS_KERNEL;
    gcons_redraw_console();
}
 
/** @}
 */