package game

// daemons.c — the daemon and fuse callbacks, dispatched by DaemonID.
// stomach() arrives with the endgame phase (starvation calls death()).

// runDaemon invokes the callback named by id (the call through d_func in C).
func (g *RogueGame) runDaemon(id DaemonID, arg int) {
	switch id {
	case DRollwand:
		g.rollwand(arg)
	case DDoctor:
		g.doctor(arg)
	case DStomach:
		g.stomach(arg)
	case DRunners:
		g.runners(arg)
	case DSwander:
		g.swander(arg)
	case DNohaste:
		g.nohaste(arg)
	case DUnconfuse:
		g.unconfuse(arg)
	case DUnsee:
		g.unsee(arg)
	case DSight:
		g.sight(arg)
	case DVisuals:
		g.visuals(arg)
	case DComeDown:
		g.comeDown(arg)
	case DLand:
		g.land(arg)
	case DTurnSee:
		g.turnSee(arg != 0)
	default:
		// Callbacks are added to this switch as their subsystems are
		// ported; reaching one that isn't here is a porting bug.
		panic("daemon not yet ported")
	}
}

// doctor is the healing daemon that restores hit points after rest
// (daemons.c doctor).
func (g *RogueGame) doctor(int) {
	p := &g.Player
	lv := p.Stats.Lvl
	ohp := p.Stats.HP
	g.Quiet++
	if lv < 8 {
		if g.Quiet+(lv<<1) > 20 {
			p.Stats.HP++
		}
	} else if g.Quiet >= 3 {
		p.Stats.HP += g.rnd(lv-7) + 1
	}
	if p.IsRing(Left, RingRegeneration) {
		p.Stats.HP++
	}
	if p.IsRing(Right, RingRegeneration) {
		p.Stats.HP++
	}
	if ohp != p.Stats.HP {
		if p.Stats.HP > p.Stats.MaxHP {
			p.Stats.HP = p.Stats.MaxHP
		}
		g.Quiet = 0
	}
}

// swander is called when it is time to start rolling for wandering monsters
// (daemons.c swander).
func (g *RogueGame) swander(int) {
	g.StartDaemon(DRollwand, 0, Before)
}

// rollwand rolls to see if a wandering monster starts up (daemons.c
// rollwand).
func (g *RogueGame) rollwand(int) {
	if g.Daemons.Between++; g.Daemons.Between >= 4 {
		if g.roll(1, 6) == 4 {
			g.wanderer()
			g.KillDaemon(DRollwand)
			g.Fuse(DSwander, 0, wanderTime(g), Before)
		}
		g.Daemons.Between = 0
	}
}

// wanderTime is the WANDERTIME macro: spread(70).
func wanderTime(g *RogueGame) int { return g.spread(70) }

// unconfuse releases the poor player from his confusion (daemons.c
// unconfuse).
func (g *RogueGame) unconfuse(int) {
	g.Player.Flags.Clear(Confused)
	g.msg("you feel less %s now", g.chooseStr("trippy", "confused"))
}

// unsee turns off the ability to see invisible (daemons.c unsee).
func (g *RogueGame) unsee(int) {
	for _, th := range g.Level.Monsters {
		if th.On(Invisible) && g.seeMonst(th) {
			g.mvaddch(th.Pos.Y, th.Pos.X, th.OldCh)
		}
	}
	g.Player.Flags.Clear(CanSeeInvisible)
}

// sight gives the hero his sight back (daemons.c sight).
func (g *RogueGame) sight(int) {
	p := &g.Player
	if p.On(Blind) {
		g.Extinguish(DSight)
		p.Flags.Clear(Blind)
		if !p.Room.Flags.Has(Gone) {
			g.enterRoom(p.Pos)
		}
		g.msg("%s", g.chooseStr("far out!  Everything is all cosmic again",
			"the veil of darkness lifts"))
	}
}

// nohaste ends the hasting (daemons.c nohaste).
func (g *RogueGame) nohaste(int) {
	g.Player.Flags.Clear(Hasted)
	g.msg("you feel yourself slowing down")
}

// stomach digests the hero's food (daemons.c stomach).
func (g *RogueGame) stomach(int) {
	p := &g.Player
	origHungry := p.HungryState
	if p.FoodLeft <= 0 {
		if p.FoodLeft--; p.FoodLeft < -StarveTime {
			g.death('s')
		}
		// the hero is fainting
		if g.NoCommand != 0 || g.rnd(5) != 0 {
			return
		}
		g.NoCommand += g.rnd(8) + 4
		p.HungryState = 3
		if !g.Options.Terse {
			g.addmsg("%s", g.chooseStr(
				"the munchies overpower your motor capabilities.  ",
				"you feel too weak from lack of food.  "))
		}
		g.msg("%s", g.chooseStr("You freak out", "You faint"))
	} else {
		oldfood := p.FoodLeft
		amulet := 0
		if g.HasAmulet {
			amulet = 1
		}
		p.FoodLeft -= g.ringEat(Left) + g.ringEat(Right) + 1 - amulet

		if p.FoodLeft < MoreTime && oldfood >= MoreTime {
			p.HungryState = 2
			g.msg("%s", g.chooseStr(
				"the munchies are interfering with your motor capabilites",
				"you are starting to feel weak"))
		} else if p.FoodLeft < 2*MoreTime && oldfood >= 2*MoreTime {
			p.HungryState = 1
			if g.Options.Terse {
				g.msg("%s", g.chooseStr("getting the munchies", "getting hungry"))
			} else {
				g.msg("%s", g.chooseStr("you are getting the munchies",
					"you are starting to get hungry"))
			}
		}
	}
	if p.HungryState != origHungry {
		p.Flags.Clear(Awake)
		g.Running = false
		g.ToDeath = false
		g.Count = 0
	}
}

// comeDown takes the hero down off her acid trip (daemons.c come_down).
func (g *RogueGame) comeDown(int) {
	p := &g.Player
	if !p.On(Hallucinating) {
		return
	}

	g.KillDaemon(DVisuals)
	p.Flags.Clear(Hallucinating)

	if p.On(Blind) {
		return
	}

	// undo the things
	for _, tp := range g.Level.Objects {
		if g.cansee(tp.Pos.Y, tp.Pos.X) {
			g.mvaddch(tp.Pos.Y, tp.Pos.X, tp.Type)
		}
	}

	// undo the monsters
	seemonst := p.On(SenseMonsters)
	for _, tp := range g.Level.Monsters {
		g.move(tp.Pos.Y, tp.Pos.X)
		if g.cansee(tp.Pos.Y, tp.Pos.X) {
			if !tp.On(Invisible) || p.On(CanSeeInvisible) {
				g.addch(tp.Disguise)
			} else {
				g.addch(g.Level.Char(tp.Pos.Y, tp.Pos.X))
			}
		} else if seemonst {
			g.standout()
			g.addch(tp.Type)
			g.standend()
		}
	}
	g.msg("Everything looks SO boring now.")
}

// visuals changes the characters for the player while hallucinating
// (daemons.c visuals).
func (g *RogueGame) visuals(int) {
	p := &g.Player
	if !g.After || (g.Running && g.Options.Jump) {
		return
	}
	// change the things
	for _, tp := range g.Level.Objects {
		if g.cansee(tp.Pos.Y, tp.Pos.X) {
			g.mvaddch(tp.Pos.Y, tp.Pos.X, g.rndThing())
		}
	}

	// change the stairs
	if !g.SeenStairs && g.cansee(g.Level.Stairs.Y, g.Level.Stairs.X) {
		g.mvaddch(g.Level.Stairs.Y, g.Level.Stairs.X, g.rndThing())
	}

	// change the monsters
	seemonst := p.On(SenseMonsters)
	for _, tp := range g.Level.Monsters {
		g.move(tp.Pos.Y, tp.Pos.X)
		if g.seeMonst(tp) {
			if tp.Type == 'X' && tp.Disguise != 'X' {
				g.addch(g.rndThing())
			} else {
				g.addch(byte(g.rnd(26) + 'A'))
			}
		} else if seemonst {
			g.standout()
			g.addch(byte(g.rnd(26) + 'A'))
			g.standend()
		}
	}
}

// land lands the hero from a levitation potion (daemons.c land).
func (g *RogueGame) land(int) {
	g.Player.Flags.Clear(Levitating)
	g.msg("%s", g.chooseStr("bummer!  You've hit the ground",
		"you float gently to the ground"))
}