//----------------------------------------------------------------------------//
//                           GNU GPL OS/K                                     //
//                                                                            //
//  Desc:       Terminal-related functions                                    //
//                                                                            //
//                                                                            //
//  Copyright © 2018-2019 The OS/K Team                                       //
//                                                                            //
//  This file is part of OS/K.                                                //
//                                                                            //
//  OS/K 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 3 of the License, or         //
//  any later version.                                                        //
//                                                                            //
//  OS/K 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.                              //
//                                                                            //
//  You should have received a copy of the GNU General Public License         //
//  along with OS/K.  If not, see <https://www.gnu.org/licenses/>.            //
//----------------------------------------------------------------------------//

#include <kernel/term.h>

extern void       VGA_Init(void);
extern Terminal_t VGA_Terminal;

//
// Initializes standard output
//
void InitTerms(void)
{
    KalAssert(!GetStdOut() && !GetStdDbg());

    VGA_Init();

    SetStdDbg(&VGA_Terminal);
    SetStdOut(&VGA_Terminal);

    ClearTerm(GetStdOut());
}

//
// Fills terminal with spaces
//
error_t ClearTerm(Terminal_t *term)
{
    error_t retcode;

    if (term == NULL) return EINVAL;
    KalAssert(term->initDone == INITOK);

    AquireLock(&term->lock);
    retcode = term->ClearTermUnlocked(term);
    ReleaseLock(&term->lock);

    return retcode;
}

//
// Changes the color code
//
error_t ChTermColor(Terminal_t *term, TermColor_t fgColor, TermColor_t bgColor)
{
    if (fgColor > KTERM_COLOR_WHITE || bgColor > KTERM_COLOR_WHITE)
        return EINVAL;

    if (term == NULL)
        return EINVAL;

    AquireLock(&term->lock);

    term->fgColor = fgColor;
    term->bgColor = bgColor;

    ReleaseLock(&term->lock);

    return EOK;
}

//
// Writes a single character on the terminal
//
error_t PutOnTerm(Terminal_t *term, char ch)
{
    error_t retcode;

    if (term == NULL) return EINVAL;
    KalAssert(term->initDone == INITOK);

    AquireLock(&term->lock);
    retcode = term->PutOnTermUnlocked(term, ch);
    ReleaseLock(&term->lock);

    return retcode;
}

//
// Prints string on terminal
//
error_t PrintOnTerm(Terminal_t *term, const char *str)
{
    error_t retcode = EOK;

    if (term == NULL) return EINVAL;
    KalAssert(term->initDone == INITOK);

    AquireLock(&term->lock);
    while (*str && retcode == EOK) {
        retcode = term->PutOnTermUnlocked(term, *str++);
    }
    ReleaseLock(&term->lock);

    return retcode;
}

//
// Prints formatted string on standard output
// Prints at most KLOG_MAX_BUFSIZE characters
//
error_t KernLog(const char *fmt, ...)
{
    va_list ap;

    char logbuf[KLOG_MAX_BUFSIZE];

    va_start(ap, fmt);
    vsnprintf(logbuf, KLOG_MAX_BUFSIZE, fmt, ap);
    va_end(ap);

    return PrintOnTerm(GetStdOut(), logbuf);
}

#ifndef _NO_DEBUG
//
// Prints formatted string on debug output
// Prints at most KLOG_MAX_BUFSIZE characters
//
error_t DebugLog(const char *fmt, ...)
{
    va_list ap;

    char logbuf[KLOG_MAX_BUFSIZE];

    va_start(ap, fmt);
    vsnprintf(logbuf, KLOG_MAX_BUFSIZE, fmt, ap);
    va_end(ap);

    return PrintOnTerm(GetStdDbg(), logbuf);
}
#endif