/* 
   chat.c - this file will do everything what have to do with the chat.. 
*/

#include "bomberclone.h"
#include "network.h"
#include "packets.h"
#include "gfx.h"
#include "keybinput.h"
#include "chat.h"

_chat chat;

/* find a free line or delete the oldest one */
int
chat_findfreeline ()
{
    int i;
	i = chat.lastline;

    if (i >= CHAT_MAX_LINES) {
        memcpy (&chat.lines[0], &chat.lines[1], sizeof (chat.lines[1]) * (CHAT_MAX_LINES - 1));
        i = CHAT_MAX_LINES - 1;
    }
    else
        chat.lastline++;

    chat.changed = 1;

    return i;
}

void
chat_cleanup ()
{
    int i;
    for (i = 0; i < CHAT_MAX_LINES; i++) {
        if (chat.lines[i].status > 0)
            chat.lines[i].status = -1;
    }
}

void
chat_addline (char *text)
{
    int l;

    l = chat_findfreeline ();
    chat.lines[l].status = 0;
    strncpy (chat.lines[l].text, text, 255);
    chat.lineschanged = 1;
}

void
chat_addstatusline (char *text)
{
    int l;
    l = chat_findfreeline ();
    chat.lines[l].status = 1;
    strncpy (chat.lines[l].text, text, 255);
    chat.lineschanged = 1;
}

void
chat_drawbox ()
{
    SDL_Rect src;
    int i;

    if (chat.visible == 0)
        chat.oldscreen = gfx_copyscreen (&chat.window);

    chat.visible = 1;

    if (gfx_locksurface (gfx.screen))
        return;

    for (i = 0; i < 2; i++) {
        src.x = chat.window.x + i;
        src.w = src.x + chat.window.w - 2;
        src.y = chat.window.y + i;
        src.h = src.y + chat.window.h - 2;
        draw_shadefield (gfx.screen, &src, CHAT_BG_SHADE_BRIGHT);
    }

    gfx_unlocksurface (gfx.screen);

    src.x = chat.window.x + 2;
    src.y = chat.window.y + 2;
    src.w = src.x + chat.window.w - 4;
    src.h = src.y + chat.window.h - 4 - font[0].size.y;
    draw_shadefield (gfx.screen, &src, CHAT_BG_SHADE_DARK);
    src.x = chat.window.x + 2;
    src.y = chat.window.y + chat.window.h - 18;
    src.w = src.x + chat.window.w - 4;
    src.h = src.y + font[0].size.y;
    draw_shadefield (gfx.screen, &src, CHAT_BG_SHADE_DARK >> 1);
    gfx_blitupdaterectadd (&chat.window);
};


void
chat_deletebox ()
{
    SDL_Rect src,
      dest;

    src.x = 0;
    src.y = 0;
    src.w = dest.w = chat.oldscreen->w;
    src.h = dest.h = chat.oldscreen->h;

    dest.x = chat.window.x;
    dest.y = chat.window.y;

    SDL_BlitSurface (chat.oldscreen, &src, gfx.screen, &dest);
    gfx_blitupdaterectadd (&chat.window);

    chat.visible = 0;
    SDL_FreeSurface (chat.oldscreen);
    chat.oldscreen = NULL;
};


void
chat_show (int x1, int y1, int x2, int y2)
{
    if (chat.visible != 0)
        chat_deletebox ();

    if (x1 == -1 || x2 == -1 || y1 == -1 || y2 == -1 || x2 <= x1 || y2 <= y1)
        chat.visible = 0;
    else {
        chat.window.x = x1;
        chat.window.y = y1;
        chat.window.w = x2 - x1;
        chat.window.h = y2 - y1;
        chat_drawbox ();
        chat.changed = 1;
        chat.lineschanged = 1;
    }
};


void
chat_clearscreen (signed char all)
{
    SDL_Rect src,
      dest;

    if (all == 1) {
        dest.x = chat.window.x + 2;
        dest.y = chat.window.y + 2;
        dest.w = dest.x + chat.window.w - 4;
        dest.h = dest.y + chat.window.h - 4;

        src.x = 2;
        src.y = 2;
        src.w = chat.window.w - 4;
        src.h = chat.window.h - 4;
    }
    else {
        /* redraw only the textline of out input box */
        dest.x = chat.window.x + 2;
        dest.y = chat.window.y + chat.window.h - 18;
        dest.w = src.w = chat.window.w - 4;
        dest.h = src.h = font[0].size.y;

        src.x = 2;
        src.y = chat.window.h - 18;
    }
    SDL_BlitSurface (chat.oldscreen, &src, gfx.screen, &dest);

    if (all == 1) {
        dest.w = dest.x + chat.window.w - 4;
        dest.h = dest.y + chat.window.h - 4 - font[0].size.y;
        draw_shadefield (gfx.screen, &dest, CHAT_BG_SHADE_DARK);
    }

    src.x = chat.window.x + 2;
    src.y = chat.window.y + chat.window.h - 18;
    src.w = src.x + chat.window.w - 4;
    src.h = src.y + font[0].size.y;
    draw_shadefield (gfx.screen, &src, CHAT_BG_SHADE_DARK >> 1);

    gfx_blitupdaterectadd (&chat.window);
};


void
chat_loop (SDL_Event * event)
{
    int i,
      y,
      l,
      p1,
      p2,
      maxchar;
    char text[255];

    i = keybinput_loop (&chat.input, event);

    if (i == 1 && chat.input.text[0] != 0) {
        sprintf (text, "%s: %s", bman.playername, chat.input.text);
        net_send_chat (text, 1);
        chat_addline (text);
        keybinput_new (&chat.input);
        i = 0;
    }

    if (((i == 0 && chat.input.changed == 1) || chat.changed == 1) && chat.visible == 1) {
        /* draw the new field */
        chat_clearscreen (chat.lineschanged);
        p1 = p2 = 0;
        maxchar = (chat.window.w - 4) / font[0].size.x;
        if (chat.lineschanged) {
            font_setcolor (255, 255, 255, 0);
            y = chat.window.y + 4;
            l = chat.startline;
            while (y < (chat.window.y + chat.window.h - 32) && chat.lines[l].text[0] != 0) {
                if (chat.lines[l].status < 0) {
                    l++;
                }
                else {
                    for (p1 = 0; (p1 < maxchar && chat.lines[l].text[p2] != 0); p1++)
                        text[p1] = chat.lines[l].text[p2++];
                    text[p1] = 0;
                    font_draw (chat.window.x + 4, y, text, 0);
                    if (chat.lines[l].text[p2] == 0) { // the end of the line
                        l++;
                        p2 = 0;
                    }
                    y = y + font[0].size.y;
                }
            }
            if (chat.lines[l].text[0] != 0) {
                chat.startline++;
                chat.changed = 1;
                chat.lineschanged = 1;
            }
            else {
                chat.changed = 0;
                chat.lineschanged = 0;
            }
        }
        if (chat.startline >= CHAT_MAX_LINES)
            chat.startline = CHAT_MAX_LINES - 5;

        /* draw the input line */
        if (chat.input.len > maxchar)
            p2 = chat.input.len - maxchar;

        for (p1 = 0; (p1 < maxchar && chat.input.text[p2] != 0); p1++)
            text[p1] = chat.input.text[p2++];
        text[p1] = 0;
        font_draw (chat.window.x + 4, (chat.window.y + chat.window.h) - 4 - font[0].size.y,
                   text, 0);
    }
};