#include "lua_console.h"
#include "lua_objs.h"
#include "log.h"

#include <stdlib.h>

#include <lua5.1/lauxlib.h>

static void lua_console_on_line (const char *line, void *arg)
{
    struct lua_console *lc = arg;
    struct error_info err;

    // ignore empty lines and EOF
    if (!line || !(*line))
        return;
    
    // eval it
    if (nexus_lua_eval(lc->lua, line, &err))
        console_print(lc->console, error_msg(&err));

    // XXX: display return value?
     
}

static void lua_console_on_eof (void *arg)
{
    struct lua_console *lc = arg;

    // exit the process
    nexus_shutdown(lc->lua->nexus);
}

static struct console_callbacks _console_callbacks = {
    .on_line    = lua_console_on_line,
    .on_eof     = lua_console_on_eof,
};

err_t lua_console_create (struct lua_console **lc_ptr, struct console *console, struct nexus_lua *lua, struct error_info *err)
{
    struct lua_console *lc;

    // allocate
    if ((lc = calloc(1, sizeof(*lc))) == NULL)
        return SET_ERROR(err, ERR_CALLOC);

    // store
    lc->console = console;
    lc->lua = lua;

    // set our console callbacks
    console_set_callbacks(console, &_console_callbacks, lc);

    // ok
    *lc_ptr = lc;

    return SUCCESS;
}

void lua_console_destroy (struct lua_console *lc)
{
    // the console
    console_destroy(lc->console);

    free(lc);
}