package forms

import (
	validation "github.com/go-ozzo/ozzo-validation/v4"
	"github.com/go-ozzo/ozzo-validation/v4/is"
	"github.com/pocketbase/pocketbase/core"
	"github.com/pocketbase/pocketbase/mails"
	"github.com/pocketbase/pocketbase/models"
	"github.com/pocketbase/pocketbase/models/schema"
)

const (
	templateVerification  = "verification"
	templatePasswordReset = "password-reset"
	templateEmailChange   = "email-change"
)

// TestEmailSend is a email template test request form.
type TestEmailSend struct {
	app core.App

	Template string `form:"template" json:"template"`
	Email    string `form:"email" json:"email"`
}

// NewTestEmailSend creates and initializes new TestEmailSend form.
func NewTestEmailSend(app core.App) *TestEmailSend {
	return &TestEmailSend{app: app}
}

// Validate makes the form validatable by implementing [validation.Validatable] interface.
func (form *TestEmailSend) Validate() error {
	return validation.ValidateStruct(form,
		validation.Field(
			&form.Email,
			validation.Required,
			validation.Length(1, 255),
			is.EmailFormat,
		),
		validation.Field(
			&form.Template,
			validation.Required,
			validation.In(templateVerification, templatePasswordReset, templateEmailChange),
		),
	)
}

// Submit validates and sends a test email to the form.Email address.
func (form *TestEmailSend) Submit() error {
	if err := form.Validate(); err != nil {
		return err
	}

	// create a test auth record
	collection := &models.Collection{
		BaseModel: models.BaseModel{Id: "__pb_test_collection_id__"},
		Name:      "__pb_test_collection_name__",
		Type:      models.CollectionTypeAuth,
	}

	record := models.NewRecord(collection)
	record.Id = "__pb_test_id__"
	record.Set(schema.FieldNameUsername, "pb_test")
	record.Set(schema.FieldNameEmail, form.Email)
	record.RefreshTokenKey()

	switch form.Template {
	case templateVerification:
		return mails.SendRecordVerification(form.app, record)
	case templatePasswordReset:
		return mails.SendRecordPasswordReset(form.app, record)
	case templateEmailChange:
		return mails.SendRecordChangeEmail(form.app, record, form.Email)
	}

	return nil
}