package stripe

import (
	"encoding/json"
)

// CheckoutSessionSubmitType is the list of allowed values for the `submit_type`
// of a Session.
type CheckoutSessionSubmitType string

// List of values that CheckoutSessionSubmitType can take.
const (
	CheckoutSessionSubmitTypeAuto   CheckoutSessionSubmitType = "auto"
	CheckoutSessionSubmitTypeBook   CheckoutSessionSubmitType = "book"
	CheckoutSessionSubmitTypeDonate CheckoutSessionSubmitType = "donate"
	CheckoutSessionSubmitTypePay    CheckoutSessionSubmitType = "pay"
)

// CheckoutSessionDisplayItemType is the list of allowed values for the display item type.
type CheckoutSessionDisplayItemType string

// List of values that CheckoutSessionDisplayItemType can take.
const (
	CheckoutSessionDisplayItemTypeCustom CheckoutSessionDisplayItemType = "custom"
	CheckoutSessionDisplayItemTypePlan   CheckoutSessionDisplayItemType = "plan"
	CheckoutSessionDisplayItemTypeSKU    CheckoutSessionDisplayItemType = "sku"
)

// CheckoutSessionMode is the list of allowed values for the mode on a Session.
type CheckoutSessionMode string

// List of values that CheckoutSessionMode can take.
const (
	CheckoutSessionModePayment      CheckoutSessionMode = "payment"
	CheckoutSessionModeSetup        CheckoutSessionMode = "setup"
	CheckoutSessionModeSubscription CheckoutSessionMode = "subscription"
)

// CheckoutSessionLineItemParams is the set of parameters allowed for a line item
// on a checkout session.
type CheckoutSessionLineItemParams struct {
	Amount      *int64    `form:"amount"`
	Currency    *string   `form:"currency"`
	Description *string   `form:"description"`
	Images      []*string `form:"images"`
	Name        *string   `form:"name"`
	Quantity    *int64    `form:"quantity"`
	TaxRates    []*string `form:"tax_rates"`
}

// CheckoutSessionPaymentIntentDataTransferDataParams is the set of parameters allowed for the
// transfer_data hash.
type CheckoutSessionPaymentIntentDataTransferDataParams struct {
	Amount      *int64  `form:"amount"`
	Destination *string `form:"destination"`
}

// CheckoutSessionPaymentIntentDataParams is the set of parameters allowed for the
// payment intent creation on a checkout session.
type CheckoutSessionPaymentIntentDataParams struct {
	Params                    `form:"*"`
	ApplicationFeeAmount      *int64                                              `form:"application_fee_amount"`
	CaptureMethod             *string                                             `form:"capture_method"`
	Description               *string                                             `form:"description"`
	OnBehalfOf                *string                                             `form:"on_behalf_of"`
	ReceiptEmail              *string                                             `form:"receipt_email"`
	SetupFutureUsage          *string                                             `form:"setup_future_usage"`
	Shipping                  *ShippingDetailsParams                              `form:"shipping"`
	StatementDescriptor       *string                                             `form:"statement_descriptor"`
	StatementDescriptorSuffix *string                                             `form:"statement_descriptor_suffix"`
	TransferData              *CheckoutSessionPaymentIntentDataTransferDataParams `form:"transfer_data"`
}

// CheckoutSessionSetupIntentDataParams is the set of parameters allowed for the setup intent
// creation on a checkout session.
type CheckoutSessionSetupIntentDataParams struct {
	Params      `form:"*"`
	Description *string `form:"description"`
	OnBehalfOf  *string `form:"on_behalf_of"`
}

// CheckoutSessionShippingAddressCollectionParams is the set of parameters allowed for the
// shipping address collection.
type CheckoutSessionShippingAddressCollectionParams struct {
	AllowedCountries []*string `form:"allowed_countries"`
}

// CheckoutSessionSubscriptionDataItemsParams is the set of parameters allowed for one item on a
// checkout session associated with a subscription.
type CheckoutSessionSubscriptionDataItemsParams struct {
	Plan     *string   `form:"plan"`
	Quantity *int64    `form:"quantity"`
	TaxRates []*string `form:"tax_rates"`
}

// CheckoutSessionSubscriptionDataParams is the set of parameters allowed for the subscription
// creation on a checkout session.
type CheckoutSessionSubscriptionDataParams struct {
	Params                `form:"*"`
	ApplicationFeePercent *float64                                      `form:"application_fee_percent"`
	DefaultTaxRates       []*string                                     `form:"default_tax_rates"`
	Items                 []*CheckoutSessionSubscriptionDataItemsParams `form:"items"`
	TrialEnd              *int64                                        `form:"trial_end"`
	TrialFromPlan         *bool                                         `form:"trial_from_plan"`
	TrialPeriodDays       *int64                                        `form:"trial_period_days"`
}

// CheckoutSessionParams is the set of parameters that can be used when creating
// a checkout session.
// For more details see https://stripe.com/docs/api/checkout/sessions/create
type CheckoutSessionParams struct {
	Params                    `form:"*"`
	BillingAddressCollection  *string                                         `form:"billing_address_collection"`
	CancelURL                 *string                                         `form:"cancel_url"`
	ClientReferenceID         *string                                         `form:"client_reference_id"`
	Customer                  *string                                         `form:"customer"`
	CustomerEmail             *string                                         `form:"customer_email"`
	LineItems                 []*CheckoutSessionLineItemParams                `form:"line_items"`
	Locale                    *string                                         `form:"locale"`
	Mode                      *string                                         `form:"mode"`
	PaymentIntentData         *CheckoutSessionPaymentIntentDataParams         `form:"payment_intent_data"`
	PaymentMethodTypes        []*string                                       `form:"payment_method_types"`
	SetupIntentData           *CheckoutSessionSetupIntentDataParams           `form:"setup_intent_data"`
	ShippingAddressCollection *CheckoutSessionShippingAddressCollectionParams `form:"shipping_address_collection"`
	SubscriptionData          *CheckoutSessionSubscriptionDataParams          `form:"subscription_data"`
	SubmitType                *string                                         `form:"submit_type"`
	SuccessURL                *string                                         `form:"success_url"`
}

// CheckoutSessionListParams is the set of parameters that can be
// used when listing sessions.
// For more details see: https://stripe.com/docs/api/checkout/sessions/list
type CheckoutSessionListParams struct {
	ListParams    `form:"*"`
	PaymentIntent *string `form:"payment_intent"`
	Subscription  *string `form:"subscription"`
}

// CheckoutSessionDisplayItemCustom represents an item of type custom in a checkout session
type CheckoutSessionDisplayItemCustom struct {
	Description string   `json:"description"`
	Images      []string `json:"images"`
	Name        string   `json:"name"`
}

// CheckoutSessionDisplayItem represents one of the items in a checkout session.
type CheckoutSessionDisplayItem struct {
	Amount   int64                             `json:"amount"`
	Currency Currency                          `json:"currency"`
	Custom   *CheckoutSessionDisplayItemCustom `json:"custom"`
	Quantity int64                             `json:"quantity"`
	Plan     *Plan                             `json:"plan"`
	SKU      *SKU                              `json:"sku"`
	Type     CheckoutSessionDisplayItemType    `json:"type"`
}

// CheckoutSessionShippingAddressCollection is the set of parameters allowed for the
// shipping address collection.
type CheckoutSessionShippingAddressCollection struct {
	AllowedCountries []string `json:"allowed_countries"`
}

// CheckoutSession is the resource representing a Stripe checkout session.
// For more details see https://stripe.com/docs/api/checkout/sessions/object
type CheckoutSession struct {
	CancelURL                 string                                    `json:"cancel_url"`
	ClientReferenceID         string                                    `json:"client_reference_id"`
	Customer                  *Customer                                 `json:"customer"`
	CustomerEmail             string                                    `json:"customer_email"`
	Deleted                   bool                                      `json:"deleted"`
	DisplayItems              []*CheckoutSessionDisplayItem             `json:"display_items"`
	ID                        string                                    `json:"id"`
	Livemode                  bool                                      `json:"livemode"`
	Locale                    string                                    `json:"locale"`
	Metadata                  map[string]string                         `json:"metadata"`
	Mode                      CheckoutSessionMode                       `json:"mode"`
	Object                    string                                    `json:"object"`
	PaymentIntent             *PaymentIntent                            `json:"payment_intent"`
	PaymentMethodTypes        []string                                  `json:"payment_method_types"`
	SetupIntent               *SetupIntent                              `json:"setup_intent"`
	Shipping                  *ShippingDetails                          `json:"shipping"`
	ShippingAddressCollection *CheckoutSessionShippingAddressCollection `json:"shipping_address_collection"`
	Subscription              *Subscription                             `json:"subscription"`
	SubmitType                CheckoutSessionSubmitType                 `json:"submit_type"`
	SuccessURL                string                                    `json:"success_url"`
}

// CheckoutSessionList is a list of sessions as retrieved from a list endpoint.
type CheckoutSessionList struct {
	ListMeta
	Data []*CheckoutSession `json:"data"`
}

// UnmarshalJSON handles deserialization of a checkout session.
// This custom unmarshaling is needed because the resulting
// property may be an id or the full struct if it was expanded.
func (p *CheckoutSession) UnmarshalJSON(data []byte) error {
	if id, ok := ParseID(data); ok {
		p.ID = id
		return nil
	}

	type session CheckoutSession
	var v session
	if err := json.Unmarshal(data, &v); err != nil {
		return err
	}

	*p = CheckoutSession(v)
	return nil
}