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/*

 * Copyright (c) 2006 Ondrej Palkovsky

 * Copyright (c) 2008 Martin Decky

 * Copyright (c) 2008 Pavel Rimsky

 * 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.

 */

/**

 * @defgroup serial Serial console

 * @brief    Serial console services (putc, puts, clear screen, cursor goto,...)

 * @{

 */

/** @file

 */

#include <stdio.h>

#include <ipc/ipc.h>

#include <async.h>

#include <ipc/fb.h>

#include <bool.h>

#include <errno.h>

#include <io/color.h>

#include <io/style.h>

#include <string.h>

#include "../console/screenbuffer.h"

#include "main.h"

#include "serial_console.h"

#define MAX_CONTROL 20

static void serial_sgr(const unsigned int mode);

void serial_putchar(wchar_t ch);

static int scr_width;

static int scr_height;

static bool color = true;   /** True if producing color output. */

static bool utf8 = false;   /** True if producing UTF8 output. */

static putc_function_t putc_function;

/* Allow only 1 connection */

static int client_connected = 0;

enum sgr_color_index {

    CI_BLACK    = 0,

    CI_RED      = 1,

    CI_GREEN    = 2,

    CI_BROWN    = 3,

    CI_BLUE     = 4,

    CI_MAGENTA  = 5,

    CI_CYAN     = 6,

    CI_WHITE    = 7,

};

enum sgr_command {

    SGR_RESET   = 0,

    SGR_BOLD    = 1,

    SGR_BLINK   = 5,

    SGR_REVERSE = 7,

    SGR_NORMAL_INT  = 22,

    SGR_BLINK_OFF   = 25,

    SGR_REVERSE_OFF = 27,

    SGR_FGCOLOR = 30,

    SGR_BGCOLOR = 40

};

static int color_map[] = {

    [COLOR_BLACK]   = CI_BLACK,

    [COLOR_BLUE]    = CI_RED,

    [COLOR_GREEN]   = CI_GREEN,

    [COLOR_CYAN]    = CI_CYAN,

    [COLOR_RED] = CI_RED,

    [COLOR_MAGENTA] = CI_MAGENTA,

    [COLOR_YELLOW]  = CI_BROWN,

    [COLOR_WHITE]   = CI_WHITE

};

void serial_puts(char *str)

{

    while (*str)

        putc_function(*(str++));

}

void serial_putchar(wchar_t ch)

{

    uint8_t buf[STR_BOUNDS(1)];

    size_t offs;

    size_t i;

    if (utf8 != true) {

        if (ch >= 0 && ch < 128)

            (*putc_function)((uint8_t) ch);

        else

            (*putc_function)('?');

        return;

    }

    offs = 0;

    if (chr_encode(ch, buf, &offs, STR_BOUNDS(1)) == EOK) {

        for (i = 0; i < offs; i++)

            (*putc_function)(buf[i]);

    } else {

        (*putc_function)('?');

    }

}

void serial_goto(const unsigned int col, const unsigned int row)

{

    if ((col > scr_width) || (row > scr_height))

        return;

    char control[MAX_CONTROL];

    snprintf(control, MAX_CONTROL, "\033[%u;%uf", row + 1, col + 1);

    serial_puts(control);

}

void serial_clrscr(void)

{

    /* Initialize graphic rendition attributes. */

    serial_sgr(SGR_RESET);

    if (color) {

        serial_sgr(SGR_FGCOLOR + CI_BLACK);

        serial_sgr(SGR_BGCOLOR + CI_WHITE);

    }

    serial_puts("\033[2J");

}

void serial_scroll(int i)

{

    if (i > 0) {

        serial_goto(0, scr_height - 1);

        while (i--)

            serial_puts("\033D");

    } else if (i < 0) {

        serial_goto(0, 0);

        while (i++)

            serial_puts("\033M");

    }

}

/** ECMA-48 Set Graphics Rendition. */

static void serial_sgr(const unsigned int mode)

{

    char control[MAX_CONTROL];

    snprintf(control, MAX_CONTROL, "\033[%um", mode);

    serial_puts(control);

}

/** Set scrolling region. */

void serial_set_scroll_region(unsigned last_row)

{

    char control[MAX_CONTROL];

    snprintf(control, MAX_CONTROL, "\033[0;%ur", last_row);

    serial_puts(control);

}

void serial_cursor_disable(void)

{

    serial_puts("\033[?25l");

}

void serial_cursor_enable(void)

{

    serial_puts("\033[?25h");

}

void serial_console_init(putc_function_t putc_fn, uint32_t w, uint32_t h)

{

    scr_width = w;

    scr_height = h;

    putc_function = putc_fn;

}

static void serial_set_style(int style)

{

    if (style == STYLE_EMPHASIS) {

        if (color) {

            serial_sgr(SGR_RESET);

            serial_sgr(SGR_FGCOLOR + CI_RED);

            serial_sgr(SGR_BGCOLOR + CI_WHITE);

        }

        serial_sgr(SGR_BOLD);

    } else {

        if (color) {

            serial_sgr(SGR_RESET);

            serial_sgr(SGR_FGCOLOR + CI_BLACK);

            serial_sgr(SGR_BGCOLOR + CI_WHITE);

        }

        serial_sgr(SGR_NORMAL_INT);

    }

}

static void serial_set_idx(unsigned fgcolor, unsigned bgcolor,

    unsigned flags)

{

    if (color) {

        serial_sgr(SGR_RESET);

        serial_sgr(SGR_FGCOLOR + color_map[fgcolor]);

        serial_sgr(SGR_BGCOLOR + color_map[bgcolor]);

    } else {

        if (fgcolor < bgcolor)

            serial_sgr(SGR_RESET);

        else

            serial_sgr(SGR_REVERSE);

    }  

}

static void serial_set_rgb(uint32_t fgcolor, uint32_t bgcolor)

{

    if (fgcolor < bgcolor)

        serial_sgr(SGR_REVERSE_OFF);

    else

        serial_sgr(SGR_REVERSE);

}

static void serial_set_attrs(const attrs_t *a)

{

    switch (a->t) {

    case at_style:

        serial_set_style(a->a.s.style);

        break;

    case at_rgb:

        serial_set_rgb(a->a.r.fg_color, a->a.r.bg_color);

        break;

    case at_idx:

        serial_set_idx(a->a.i.fg_color,

            a->a.i.bg_color, a->a.i.flags);

        break;

    default:

        break;

    }

}

/** Draw text data to viewport.

 *

 * @param vport Viewport id

 * @param data  Text data.

 * @param x Leftmost column of the area.

 * @param y Topmost row of the area.

 * @param w Number of rows.

 * @param h Number of columns.

 */

static void draw_text_data(keyfield_t *data, unsigned int x,

    unsigned int y, unsigned int w, unsigned int h)

{

    unsigned int i, j;

    keyfield_t *field;

    attrs_t *a0, *a1;

    serial_goto(x, y);

    a0 = &data[0].attrs;

    serial_set_attrs(a0);

    for (j = 0; j < h; j++) {

        if (j > 0 && w != scr_width)

            serial_goto(x, j);

        for (i = 0; i < w; i++) {

            field = &data[j * w + i];

            a1 = &field->attrs;

            if (!attrs_same(*a0, *a1))

                serial_set_attrs(a1);

            serial_putchar(field->character);

            a0 = a1;

        }

    }

}

int lastcol = 0;

int lastrow = 0;

/**

 * Main function of the thread serving client connections.

 */

void serial_client_connection(ipc_callid_t iid, ipc_call_t *icall)

{

    int retval;

    ipc_callid_t callid;

    ipc_call_t call;

    keyfield_t *interbuf = NULL;

    size_t intersize = 0;

    wchar_t c;

    int col, row, w, h;

    int i;

    attrs_t cur_attr;

    if (client_connected) {

        ipc_answer_0(iid, ELIMIT);

        return;

    }

    client_connected = 1;

    ipc_answer_0(iid, EOK);

    cur_attr.t = at_style;

    cur_attr.a.s.style = STYLE_NORMAL;

    /* Clear the terminal, set scrolling region

       to 0 - height rows. */

    serial_clrscr();

    serial_goto(0, 0);

    serial_set_scroll_region(scr_height);

    while (true) {

        callid = async_get_call(&call);

        switch (IPC_GET_METHOD(call)) {

        case IPC_M_PHONE_HUNGUP:

            client_connected = 0;

            ipc_answer_0(callid, EOK);

            return;

        case IPC_M_SHARE_OUT:

            /* We accept one area for data interchange */

            intersize = IPC_GET_ARG2(call);

            if (intersize >= scr_width * scr_height *

                sizeof(*interbuf)) {

                receive_comm_area(callid, &call,

                    (void *) &interbuf);

                continue;

            }

            retval = EINVAL;

            break;

        case FB_DRAW_TEXT_DATA:

            col = IPC_GET_ARG1(call);

            row = IPC_GET_ARG2(call);

            w = IPC_GET_ARG3(call);

            h = IPC_GET_ARG4(call);

            if (!interbuf) {

                retval = EINVAL;

                break;

            }

            if (col + w > scr_width || row + h > scr_height) {

                retval = EINVAL;

                break;

            }

            draw_text_data(interbuf, col, row, w, h);

            lastcol = col + w;

            lastrow = row + h - 1;

            retval = 0;

            break;

        case FB_PUTCHAR:

            c = IPC_GET_ARG1(call);

            col = IPC_GET_ARG2(call);

            row = IPC_GET_ARG3(call);

            if ((lastcol != col) || (lastrow != row))

                serial_goto(col, row);

            lastcol = col + 1;

            lastrow = row;

            serial_putchar(c);

            retval = 0;

            break;

        case FB_CURSOR_GOTO:

            col = IPC_GET_ARG1(call);

            row = IPC_GET_ARG2(call);

            serial_goto(col, row);

            lastcol = col;

            lastrow = row;

            retval = 0;

            break;

        case FB_GET_CSIZE:

            ipc_answer_2(callid, EOK, scr_width, scr_height);

            continue;

        case FB_GET_COLOR_CAP:

            ipc_answer_1(callid, EOK, color ? FB_CCAP_INDEXED :

                FB_CCAP_STYLE);

            continue;

        case FB_CLEAR:

            serial_clrscr();

            retval = 0;

            break;

        case FB_SET_STYLE:

            cur_attr.t = at_style;

            cur_attr.a.s.style = IPC_GET_ARG1(call);

            cur_attr.a.i.bg_color = IPC_GET_ARG2(call);

            serial_set_attrs(&cur_attr);

            retval = 0;

            break;

        case FB_SET_COLOR:

            cur_attr.t = at_idx;

            cur_attr.a.i.fg_color = IPC_GET_ARG1(call);

            cur_attr.a.i.bg_color = IPC_GET_ARG2(call);

            cur_attr.a.i.flags = IPC_GET_ARG3(call);

            serial_set_attrs(&cur_attr);

            retval = 0;

            break;

        case FB_SET_RGB_COLOR:

            cur_attr.t = at_rgb;

            cur_attr.a.i.fg_color = IPC_GET_ARG1(call);

            cur_attr.a.i.bg_color = IPC_GET_ARG2(call);

            serial_set_attrs(&cur_attr);

            retval = 0;

            break;

        case FB_SCROLL:

            i = IPC_GET_ARG1(call);

            if ((i > scr_height) || (i < -scr_height)) {

                retval = EINVAL;

                break;

            }

            serial_scroll(i);

            serial_goto(lastcol, lastrow);

            retval = 0;

            break;

        case FB_CURSOR_VISIBILITY:

            if(IPC_GET_ARG1(call))

                serial_cursor_enable();

            else

                serial_cursor_disable();

            retval = 0;

            break;

        case FB_SCREEN_YIELD:

            serial_sgr(SGR_RESET);

            serial_puts("\033[2J");

            serial_goto(0, 0);

            serial_cursor_enable();

            retval = 0;

            break;

        case FB_SCREEN_RECLAIM:

            serial_clrscr();

            serial_set_attrs(&cur_attr);

            retval = 0;

            break;

        default:

            retval = ENOENT;

        }

        ipc_answer_0(callid, retval);

    }

}

/**

 * @}

 */