/*
 * nullgame.c [FIXME]: Template defining the null game (in which no
 * moves are permitted and nothing is ever drawn). This file exists
 * solely as a basis for constructing new game definitions - it
 * helps to have something which will compile from the word go and
 * merely doesn't _do_ very much yet.
 * 
 * Parts labelled FIXME actually want _removing_ (e.g. the dummy
 * field in each of the required data structures, and this entire
 * comment itself) when converting this source file into one
 * describing a real game.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <ctype.h>
#include <math.h>

#include "puzzles.h"

enum {
    COL_BACKGROUND,
    NCOLOURS
};

struct game_params {
    int FIXME;
};

struct game_state {
    int FIXME;
};

static game_params *default_params(void)
{
    game_params *ret = snew(game_params);

    ret->FIXME = 0;

    return ret;
}

static int game_fetch_preset(int i, char **name, game_params **params)
{
    return FALSE;
}

static void free_params(game_params *params)
{
    sfree(params);
}

static game_params *dup_params(const game_params *params)
{
    game_params *ret = snew(game_params);
    *ret = *params;		       /* structure copy */
    return ret;
}

static void decode_params(game_params *params, char const *string)
{
}

static char *encode_params(const game_params *params, int full)
{
    return dupstr("FIXME");
}

static config_item *game_configure(const game_params *params)
{
    return NULL;
}

static game_params *custom_params(const config_item *cfg)
{
    return NULL;
}

static char *validate_params(const game_params *params, int full)
{
    return NULL;
}

static char *new_game_desc(const game_params *params, random_state *rs,
			   char **aux, int interactive)
{
    return dupstr("FIXME");
}

static char *validate_desc(const game_params *params, const char *desc)
{
    return NULL;
}

static game_state *new_game(midend *me, const game_params *params,
                            const char *desc)
{
    game_state *state = snew(game_state);

    state->FIXME = 0;

    return state;
}

static game_state *dup_game(const game_state *state)
{
    game_state *ret = snew(game_state);

    ret->FIXME = state->FIXME;

    return ret;
}

static void free_game(game_state *state)
{
    sfree(state);
}

static char *solve_game(const game_state *state, const game_state *currstate,
                        const char *aux, char **error)
{
    return NULL;
}

static int game_can_format_as_text_now(const game_params *params)
{
    return TRUE;
}

static char *game_text_format(const game_state *state)
{
    return NULL;
}

static game_ui *new_ui(const game_state *state)
{
    return NULL;
}

static void free_ui(game_ui *ui)
{
}

static char *encode_ui(const game_ui *ui)
{
    return NULL;
}

static void decode_ui(game_ui *ui, const char *encoding)
{
}

static void game_changed_state(game_ui *ui, const game_state *oldstate,
                               const game_state *newstate)
{
}

struct game_drawstate {
    int tilesize;
    int FIXME;
};

static char *interpret_move(const game_state *state, game_ui *ui,
                            const game_drawstate *ds,
                            int x, int y, int button)
{
    return NULL;
}

static game_state *execute_move(const game_state *state, const char *move)
{
    return NULL;
}

/* ----------------------------------------------------------------------
 * Drawing routines.
 */

static void game_compute_size(const game_params *params, int tilesize,
                              int *x, int *y)
{
    *x = *y = 10 * tilesize;	       /* FIXME */
}

static void game_set_size(drawing *dr, game_drawstate *ds,
                          const game_params *params, int tilesize)
{
    ds->tilesize = tilesize;
}

static float *game_colours(frontend *fe, int *ncolours)
{
    float *ret = snewn(3 * NCOLOURS, float);

    frontend_default_colour(fe, &ret[COL_BACKGROUND * 3]);

    *ncolours = NCOLOURS;
    return ret;
}

static game_drawstate *game_new_drawstate(drawing *dr, const game_state *state)
{
    struct game_drawstate *ds = snew(struct game_drawstate);

    ds->tilesize = 0;
    ds->FIXME = 0;

    return ds;
}

static void game_free_drawstate(drawing *dr, game_drawstate *ds)
{
    sfree(ds);
}

static void game_redraw(drawing *dr, game_drawstate *ds,
                        const game_state *oldstate, const game_state *state,
                        int dir, const game_ui *ui,
                        float animtime, float flashtime)
{
    /*
     * The initial contents of the window are not guaranteed and
     * can vary with front ends. To be on the safe side, all games
     * should start by drawing a big background-colour rectangle
     * covering the whole window.
     */
    draw_rect(dr, 0, 0, 10*ds->tilesize, 10*ds->tilesize, COL_BACKGROUND);
    draw_update(dr, 0, 0, 10*ds->tilesize, 10*ds->tilesize);
}

static float game_anim_length(const game_state *oldstate,
                              const game_state *newstate, int dir, game_ui *ui)
{
    return 0.0F;
}

static float game_flash_length(const game_state *oldstate,
                               const game_state *newstate, int dir, game_ui *ui)
{
    return 0.0F;
}

static int game_status(const game_state *state)
{
    return 0;
}

static int game_timing_state(const game_state *state, game_ui *ui)
{
    return TRUE;
}

static void game_print_size(const game_params *params, float *x, float *y)
{
}

static void game_print(drawing *dr, const game_state *state, int tilesize)
{
}

#ifdef COMBINED
#define thegame nullgame
#endif

const struct game thegame = {
    "Null Game", NULL, NULL,
    default_params,
    game_fetch_preset,
    decode_params,
    encode_params,
    free_params,
    dup_params,
    FALSE, game_configure, custom_params,
    validate_params,
    new_game_desc,
    validate_desc,
    new_game,
    dup_game,
    free_game,
    FALSE, solve_game,
    FALSE, game_can_format_as_text_now, game_text_format,
    new_ui,
    free_ui,
    encode_ui,
    decode_ui,
    game_changed_state,
    interpret_move,
    execute_move,
    20 /* FIXME */, game_compute_size, game_set_size,
    game_colours,
    game_new_drawstate,
    game_free_drawstate,
    game_redraw,
    game_anim_length,
    game_flash_length,
    game_status,
    FALSE, FALSE, game_print_size, game_print,
    FALSE,			       /* wants_statusbar */
    FALSE, game_timing_state,
    0,				       /* flags */
};
