package controller

import (
	e "github.com/iliadenisov/galaxy/internal/error"
	"github.com/iliadenisov/galaxy/internal/model/game"
	"github.com/iliadenisov/galaxy/internal/util"
)

func (c *Controller) SendFleet(raceName, fleetName string, planetNumber uint) error {
	ri, err := c.Cache.raceIndex(raceName)
	if err != nil {
		return err
	}
	fi, ok := c.Cache.fleetIndex(ri, fleetName)
	if !ok {
		return e.NewEntityNotExistsError("fleet %q", fleetName)
	}
	return c.Cache.SendFleet(ri, fi, planetNumber)
}

func (c *Cache) SendFleet(ri, fi int, planetNumber uint) error {
	c.validateRaceIndex(ri)
	c.validateFleetIndex(fi)
	state, sourcePlanet, _ := c.FleetState(c.g.Fleets[fi].ID)
	if game.StateInOrbit != state && game.StateLaunched != state {
		return e.NewShipsBusyError()
	}

	p1, ok := c.Planet(*sourcePlanet)
	// p1, ok := PlanetByNum(g, *sourcePlanet)
	if !ok {
		return e.NewGameStateError("source planet #%d does not exists", sourcePlanet)
	}
	p2, ok := c.Planet(planetNumber)
	// p2, ok := PlanetByNum(g, planetNumber)
	if !ok {
		return e.NewEntityNotExistsError("destination planet #%d", planetNumber)
	}
	rangeToDestination := util.ShortDistance(c.g.Map.Width, c.g.Map.Height, p1.X, p1.Y, p2.X, p2.Y)
	if rangeToDestination > c.g.Race[ri].FlightDistance() {
		return e.NewSendUnreachableDestinationError("range=%.03f", rangeToDestination)
	}

	for sg := range c.FleetGroups(ri, fi) {
		st := c.ShipType(ri, sg.TypeID)
		// st, ok := ShipClass(g, ri, sg.TypeID)
		// if !ok {
		// 	return e.NewGameStateError("not found: ShipType ID=%v", sg.TypeID)
		// }
		if st.DriveBlockMass() == 0 {
			return e.NewSendShipHasNoDrivesError("Class=%s", st.Name)
		}
	}

	if *sourcePlanet == planetNumber {
		c.UnsendFleet(ri, fi)
		return nil
	}

	c.LaunchFleet(ri, fi, planetNumber)

	return nil
}

func (c *Cache) LaunchFleet(ri, fi int, destination uint) {
	c.validateRaceIndex(ri)
	c.validateFleetIndex(fi)
	for sg := range c.FleetGroups(ri, fi) {
		c.LaunchShips(*sg, destination)
		// sgi := slices.IndexFunc(g.ShipGroups, func(s ShipGroup) bool { return sg.Index == s.Index })
		// if sgi < 0 {
		// 	panic(fmt.Sprintf("LauncgFleet: cannot find ship group index=%d", sg.Index))
		// }
		// g.ShipGroups[sgi] = c.LaunchShips(sg, destination)
	}
}

func (c *Cache) UnsendFleet(ri, fi int) {
	c.validateRaceIndex(ri)
	c.validateFleetIndex(fi)
	for sg := range c.FleetGroups(ri, fi) {
		c.UnsendShips(*sg)
		// sgi := slices.IndexFunc(g.ShipGroups, func(s ShipGroup) bool { return sg.Index == s.Index })
		// if sgi < 0 {
		// 	panic(fmt.Sprintf("UnsendFleet: cannot find ship group index=%d", sg.Index))
		// }
		// g.ShipGroups[sgi] = c.UnsendShips(sg)
	}
}