--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/libmlk-adventure/adventure/spell/fire-minor.c	Fri Oct 01 20:30:00 2021 +0200
@@ -0,0 +1,130 @@
+/*
+ * fire-minor.c -- minor fire
+ *
+ * Copyright (c) 2020-2021 David Demelier <markand@malikania.fr>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <math.h>
+#include <stdlib.h>
+
+#include <core/action.h>
+#include <core/alloc.h>
+#include <core/animation.h>
+#include <core/maths.h>
+
+#include <rpg/battle.h>
+#include <rpg/character.h>
+#include <rpg/selection.h>
+
+#include <adventure/adventure_p.h>
+#include <adventure/assets.h>
+
+#include "fire-minor.h"
+
+struct rendering {
+	struct battle *battle;
+	struct battle_entity *source;
+	struct battle_entity *target;
+	struct action action;
+	struct animation animation;
+};
+
+static int
+update(struct action *act, unsigned int ticks)
+{
+	struct rendering *rdr = act->data;
+
+	return animation_update(&rdr->animation, ticks);
+}
+
+static void
+draw(struct action *act)
+{
+	const struct rendering *rdr = act->data;
+
+	animation_draw(&rdr->animation, rdr->target->x, rdr->target->y);
+}
+
+static void
+end(struct action *act)
+{
+	struct rendering *rdr = act->data;
+	float base;
+
+	/* Compute damage. */
+	/* TODO: move this into a general maths computation. */
+	/* TODO: move min/max limits outside. */
+	base  = util_nrand(50, 70);
+	base += base * (maths_scale(rdr->source->ch->atk + rdr->source->ch->atkbonus, 0, 1000, 0, 100) / 100);
+
+	/* Reduce damage taken. */
+	base -= base * (maths_scale(rdr->target->ch->atk + rdr->target->ch->atkbonus, 0, 1000, 0, 100) / 200);
+	base  = base < 0 ? 0 : base;
+
+	/* TODO: add battle_damage function*/
+	rdr->target->ch->hp = fmax(rdr->target->ch->hp - base, rdr->target->ch->hp);
+	battle_indicator_hp(rdr->battle, rdr->target->ch, base);
+}
+
+static void
+finish(struct action *act)
+{
+	free(act->data);
+}
+
+static void
+select(const struct battle *bt, struct selection *slt)
+{
+	slt->index_side = 0;
+
+	selection_first(slt, bt);
+}
+
+static void
+action(struct battle *bt, struct character *owner, const struct selection *slt)
+{
+	struct rendering *rdr;
+
+	/* Action. */
+	rdr = alloc_new0(sizeof (*rdr));
+	rdr->action.data = rdr;
+	rdr->action.update = update;
+	rdr->action.draw = draw;
+	rdr->action.end = end;
+	rdr->action.finish = finish;
+
+	/* Battle and target. */
+	rdr->battle = bt;
+	rdr->source = battle_find(bt, owner);
+	rdr->target = &bt->enemies[slt->index_character];
+
+	/* Animation. */
+	rdr->animation.delay = 10;
+	rdr->animation.sprite = &assets_sprites[ASSETS_SPRITE_EXPLOSION];
+	animation_start(&rdr->animation);
+
+	action_stack_add(&bt->actions[0], &rdr->action);
+}
+
+const struct spell spell_fire_minor = {
+	.name = N_("Fire Minor"),
+	.description = N_("A small amount of fire balls"),
+	.mp = 10,
+	.type = SPELL_TYPE_FIRE,
+	.select_kind = SELECTION_KIND_ONE,
+	.select_side = SELECTION_SIDE_ENEMY,
+	.select = select,
+	.action = action
+};