package domain

import (
	"context"
	"fmt"
	"strings"

	"gitlab.com/unboundsoftware/eventsourced/eventsourced"

	"gitlab.com/unboundsoftware/schemas/hash"
)

type AddOrganization struct {
	Name      string
	Initiator string
}

func (a AddOrganization) Validate(_ context.Context, aggregate eventsourced.Aggregate) error {
	if aggregate.Identity() != nil {
		return fmt.Errorf("organization already exists")
	}
	if len(a.Name) == 0 {
		return fmt.Errorf("name is required")
	}
	return nil
}

func (a AddOrganization) Event(context.Context) eventsourced.Event {
	return &OrganizationAdded{
		Name:      a.Name,
		Initiator: a.Initiator,
	}
}

var _ eventsourced.Command = AddOrganization{}

type AddAPIKey struct {
	Name      string
	Key       string
	Refs      []string
	Read      bool
	Publish   bool
	Initiator string
}

func (a AddAPIKey) Validate(_ context.Context, aggregate eventsourced.Aggregate) error {
	if aggregate.Identity() == nil {
		return fmt.Errorf("organization does not exist")
	}
	for _, k := range aggregate.(*Organization).APIKeys {
		if k.Name == a.Name {
			return fmt.Errorf("a key named '%s' already exist", a.Name)
		}
	}
	return nil
}

func (a AddAPIKey) Event(context.Context) eventsourced.Event {
	return &APIKeyAdded{
		Name:      a.Name,
		Key:       hash.String(a.Key),
		Refs:      a.Refs,
		Read:      a.Read,
		Publish:   a.Publish,
		Initiator: a.Initiator,
	}
}

var _ eventsourced.Command = AddAPIKey{}

type UpdateSubGraph struct {
	OrganizationId string
	Ref            string
	Service        string
	Url            *string
	WSUrl          *string
	Sdl            string
	Initiator      string
}

func (u UpdateSubGraph) Validate(_ context.Context, aggregate eventsourced.Aggregate) error {
	switch a := aggregate.(type) {
	case *SubGraph:
		if strings.TrimSpace(u.Ref) == "" {
			return fmt.Errorf("ref is missing")
		}
		if strings.TrimSpace(u.Service) == "" {
			return fmt.Errorf("service is missing")
		}
		if strings.TrimSpace(u.Sdl) == "" {
			return fmt.Errorf("SDL is missing")
		}
		if (u.Url == nil || strings.TrimSpace(*u.Url) == "") && a.Url == nil {
			return fmt.Errorf("url is missing")
		}
	default:
		return fmt.Errorf("aggregate is not a SubGraph")
	}
	return nil
}

func (u UpdateSubGraph) Event(context.Context) eventsourced.Event {
	return &SubGraphUpdated{
		OrganizationId: u.OrganizationId,
		Ref:            u.Ref,
		Service:        u.Service,
		Url:            u.Url,
		WSUrl:          u.WSUrl,
		Sdl:            u.Sdl,
		Initiator:      u.Initiator,
	}
}

var _ eventsourced.Command = UpdateSubGraph{}