galaxy-game/internal/controller/order.go

package controller

import (
	"errors"
	"fmt"

	"github.com/google/uuid"
	e "github.com/iliadenisov/galaxy/internal/error"
	"github.com/iliadenisov/galaxy/internal/model/order"
)

func (c *Controller) ValidateOrder(actor string, commands ...order.DecodableCommand) (err error) {
	for i := range commands {
		if _, ok := commands[i].(order.CommandRaceQuit); ok && i != len(commands)-1 {
			err = e.NewQuitCommandFollowedByCommandError()
		}
		if err != nil {
			return err
		}
		err = errors.Join(err, c.applyCommand(actor, commands[i]))
	}
	return
}

func (c *Controller) applyCommand(actor string, cmd order.DecodableCommand) (err error) {
	var m *order.CommandMeta
	if v, ok := order.AsCommand[*order.CommandRaceQuit](cmd); ok {
		m = &v.CommandMeta
		err = c.RaceQuit(actor)
	} else if v, ok := order.AsCommand[*order.CommandRaceVote](cmd); ok {
		m = &v.CommandMeta
		err = c.RaceVote(actor, v.Acceptor)
	} else if v, ok := order.AsCommand[*order.CommandRaceRelation](cmd); ok {
		m = &v.CommandMeta
		err = c.RaceRelation(actor, v.Acceptor, v.Relation)
	} else if v, ok := order.AsCommand[*order.CommandShipClassCreate](cmd); ok {
		m = &v.CommandMeta
		err = c.ShipClassCreate(actor, v.Name, v.Drive, int(v.Armament), v.Weapons, v.Shields, v.Cargo)
	} else if v, ok := order.AsCommand[*order.CommandShipClassMerge](cmd); ok {
		m = &v.CommandMeta
		err = c.ShipClassMerge(actor, v.Name, v.Target)
	} else if v, ok := order.AsCommand[*order.CommandShipClassRemove](cmd); ok {
		m = &v.CommandMeta
		err = c.ShipClassRemove(actor, v.Name)
	} else if v, ok := order.AsCommand[*order.CommandShipGroupLoad](cmd); ok {
		m = &v.CommandMeta
		err = c.ShipGroupLoad(actor, uuid.MustParse(v.ID), v.Cargo, v.Quantity)
	} else if v, ok := order.AsCommand[*order.CommandShipGroupUnload](cmd); ok {
		m = &v.CommandMeta
		err = c.ShipGroupUnload(actor, uuid.MustParse(v.ID), v.Quantity)
	} else if v, ok := order.AsCommand[*order.CommandShipGroupSend](cmd); ok {
		m = &v.CommandMeta
		err = c.ShipGroupSend(actor, uuid.MustParse(v.ID), uint(v.Destination))
	} else if v, ok := order.AsCommand[*order.CommandShipGroupUpgrade](cmd); ok {
		m = &v.CommandMeta
		err = c.ShipGroupUpgrade(actor, uuid.MustParse(v.ID), v.Tech, v.Level)
	} else if v, ok := order.AsCommand[*order.CommandShipGroupMerge](cmd); ok {
		m = &v.CommandMeta
		err = c.ShipGroupMerge(actor)
	} else if v, ok := order.AsCommand[*order.CommandShipGroupBreak](cmd); ok {
		m = &v.CommandMeta
		err = c.ShipGroupBreak(actor, uuid.MustParse(v.ID), uuid.MustParse(v.NewID), uint(v.Quantity))
	} else if v, ok := order.AsCommand[*order.CommandShipGroupDismantle](cmd); ok {
		m = &v.CommandMeta
		err = c.ShipGroupDismantle(actor, uuid.MustParse(v.ID))
	} else if v, ok := order.AsCommand[*order.CommandShipGroupTransfer](cmd); ok {
		m = &v.CommandMeta
		err = c.ShipGroupTransfer(actor, v.Acceptor, uuid.MustParse(v.ID))
	} else if v, ok := order.AsCommand[*order.CommandShipGroupJoinFleet](cmd); ok {
		m = &v.CommandMeta
		err = c.ShipGroupJoinFleet(actor, v.Name, uuid.MustParse(v.ID))
	} else if v, ok := order.AsCommand[*order.CommandFleetMerge](cmd); ok {
		m = &v.CommandMeta
		err = c.FleetMerge(actor, v.Name, v.Target)
	} else if v, ok := order.AsCommand[*order.CommandFleetSend](cmd); ok {
		m = &v.CommandMeta
		err = c.FleetSend(actor, v.Name, uint(v.Destination))
	} else if v, ok := order.AsCommand[*order.CommandScienceCreate](cmd); ok {
		m = &v.CommandMeta
		err = c.ScienceCreate(actor, v.Name, v.Drive, v.Weapons, v.Shields, v.Cargo)
	} else if v, ok := order.AsCommand[*order.CommandScienceRemove](cmd); ok {
		m = &v.CommandMeta
		err = c.ScienceRemove(actor, v.Name)
	} else if v, ok := order.AsCommand[*order.CommandPlanetRename](cmd); ok {
		m = &v.CommandMeta
		err = c.PlanetRename(actor, v.Number, v.Name)
	} else if v, ok := order.AsCommand[*order.CommandPlanetProduce](cmd); ok {
		m = &v.CommandMeta
		err = c.PlanetProduce(actor, v.Number, v.Production, v.Subject)
	} else if v, ok := order.AsCommand[*order.CommandPlanetRouteSet](cmd); ok {
		m = &v.CommandMeta
		err = c.PlanetRouteSet(actor, v.LoadType, uint(v.Origin), uint(v.Destination))
	} else if v, ok := order.AsCommand[*order.CommandPlanetRouteRemove](cmd); ok {
		m = &v.CommandMeta
		err = c.PlanetRouteRemove(actor, v.LoadType, uint(v.Origin))
	} else {
		return e.NewUnrecognizedCommandError(cmd.CommandType().String())
	}

	if ge, ok := errors.AsType[*e.GenericError](err); ok {
		m.Result(ge.Code)
	} else if err != nil {
		panic(fmt.Errorf("error applying command has unknown origin: %w", err))
	} else {
		m.Result(0)
	}

	return
}

// TODO: test commands ordering
func (c *Controller) applyOrders(t uint) error {
	raceOrder := make(map[int][]order.DecodableCommand)
	unloadGroups := make([]uuid.UUID, 0)
	unloadQuantities := make([]float64, 0)
	for ri := range c.Cache.listRaceActingIdx() {
		o, ok, err := c.Repo.LoadOrder(t, c.Cache.g.Race[ri].ID)
		if err != nil {
			return err
		}
		if !ok {
			continue
		}
		raceOrder[ri] = o.Commands
		for i := range o.Commands {
			if o.Commands[i].CommandType() == order.CommandTypeShipGroupUnload {
				unloadCommand := o.Commands[i].(order.CommandShipGroupUnload)
				unloadGroups = append(unloadGroups, uuid.MustParse(unloadCommand.ID))
				unloadQuantities = append(unloadQuantities, unloadCommand.Quantity)
			}
		}
	}

	if err := c.Cache.shipGroupUnloadColonistChallenge(unloadGroups, unloadQuantities); err != nil {
		return err
	}

	for ri := range raceOrder {
		for _, cmd := range raceOrder[ri] {
			if cmd.CommandType() == order.CommandTypeShipGroupUnload {
				// group unload commands execution should be failed at this point,
				// otherwise produce no-errors
				if v, ok := order.AsCommand[*order.CommandShipGroupUnload](cmd); ok {
					v.Result(0)
				}
				continue
			}
			// any command might fail due to challenged planets colonization
			_ = c.applyCommand(c.Cache.g.Race[ri].Name, cmd)
		}
	}

	for ri := range c.Cache.listRaceActingIdx() {
		if err := c.Repo.SaveOrder(t, c.Cache.g.Race[ri].ID, &order.Order{Commands: raceOrder[ri]}); err != nil {
			return err
		}
	}

	return nil
}