package command

import (
	"github.com/caos/zitadel/internal/eventstore/v2"
	"github.com/caos/zitadel/internal/v2/domain"
	"github.com/caos/zitadel/internal/v2/repository/usergrant"
)

type UserGrantWriteModel struct {
	eventstore.WriteModel

	UserID         string
	ProjectID      string
	ProjectGrantID string
	RoleKeys       []string
	State          domain.UserGrantState
}

func NewUserGrantWriteModel(userGrantID string, resourceOwner string) *UserGrantWriteModel {
	return &UserGrantWriteModel{
		WriteModel: eventstore.WriteModel{
			AggregateID:   userGrantID,
			ResourceOwner: resourceOwner,
		},
	}
}

func (wm *UserGrantWriteModel) AppendEvents(events ...eventstore.EventReader) {
	wm.WriteModel.AppendEvents(events...)
}

func (wm *UserGrantWriteModel) Reduce() error {
	for _, event := range wm.Events {
		switch e := event.(type) {
		case *usergrant.UserGrantAddedEvent:
			wm.UserID = e.UserID
			wm.ProjectID = e.ProjectID
			wm.ProjectGrantID = e.ProjectGrantID
			wm.RoleKeys = e.RoleKeys
			wm.State = domain.UserGrantStateActive
		case *usergrant.UserGrantChangedEvent:
			wm.RoleKeys = e.RoleKeys
		case *usergrant.UserGrantCascadeChangedEvent:
			wm.RoleKeys = e.RoleKeys
		case *usergrant.UserGrantDeactivatedEvent:
			if wm.State == domain.UserGrantStateRemoved {
				continue
			}
			wm.State = domain.UserGrantStateInactive
		case *usergrant.UserGrantReactivatedEvent:
			if wm.State == domain.UserGrantStateRemoved {
				continue
			}
			wm.State = domain.UserGrantStateActive
		case *usergrant.UserGrantRemovedEvent:
			wm.State = domain.UserGrantStateRemoved
		case *usergrant.UserGrantCascadeRemovedEvent:
			wm.State = domain.UserGrantStateRemoved
		}
	}
	return wm.WriteModel.Reduce()
}

func (wm *UserGrantWriteModel) Query() *eventstore.SearchQueryBuilder {
	query := eventstore.NewSearchQueryBuilder(eventstore.ColumnsEvent, usergrant.AggregateType).
		AggregateIDs(wm.AggregateID)
	if wm.ResourceOwner != "" {
		query.ResourceOwner(wm.ResourceOwner)
	}
	return query
}

func UserGrantAggregateFromWriteModel(wm *eventstore.WriteModel) *usergrant.Aggregate {
	return &usergrant.Aggregate{
		Aggregate: *eventstore.AggregateFromWriteModel(wm, usergrant.AggregateType, usergrant.AggregateVersion),
	}
}