package domain

import (
	"fmt"
	"strings"
	"time"
)

type PaymentStatus string

const (
	PaymentStatusPending    PaymentStatus = "PENDING"
	PaymentStatusProcessing PaymentStatus = "PROCESSING"
	PaymentStatusSuccess    PaymentStatus = "SUCCESS"
	PaymentStatusFailed     PaymentStatus = "FAILED"
	PaymentStatusCancelled  PaymentStatus = "CANCELLED"
	PaymentStatusExpired    PaymentStatus = "EXPIRED"
)

type Payment struct {
	ID             int64
	UserID         int64
	PlanID         *int64
	SubscriptionID *int64
	SessionID      *string
	TransactionID  *string
	Nonce          string
	Amount         float64
	Currency       string
	PaymentMethod  *string
	Status         string
	PaymentURL     *string
	PaidAt         *time.Time
	ExpiresAt      *time.Time
	CreatedAt      time.Time
	UpdatedAt      *time.Time
	PlanName       *string
}

type CreatePaymentInput struct {
	UserID        int64
	PlanID        *int64
	Amount        float64
	Currency      string
	PaymentMethod *string
	Nonce         string
	ExpiresAt     *time.Time
}

type PaymentProvider string

const (
	PaymentProviderChapa   PaymentProvider = "CHAPA"
	PaymentProviderArifPay PaymentProvider = "ARIFPAY"
)

func ParsePaymentProvider(raw string) (PaymentProvider, error) {
	switch strings.ToUpper(strings.TrimSpace(raw)) {
	case string(PaymentProviderChapa):
		return PaymentProviderChapa, nil
	case string(PaymentProviderArifPay), "ARIF_PAY":
		return PaymentProviderArifPay, nil
	default:
		return "", fmt.Errorf("unsupported payment provider %q", raw)
	}
}

type InitiateSubscriptionPaymentRequest struct {
	PlanID   int64           `json:"plan_id" validate:"required"`
	Phone    string          `json:"phone" validate:"required"`
	Email    string          `json:"email" validate:"required,email"`
	Provider PaymentProvider `json:"provider"`
}

type InitiateSubscriptionPaymentResponse struct {
	PaymentID  int64   `json:"payment_id"`
	SessionID  string  `json:"session_id"`
	PaymentURL string  `json:"payment_url"`
	Amount     float64 `json:"amount"`
	Currency   string  `json:"currency"`
	ExpiresAt  string  `json:"expires_at"`
}

type VerifyPaymentRequest struct {
	SessionID string `json:"session_id"`
}

type PaymentWebhookData struct {
	SessionID         string
	TransactionID     string
	Nonce             string
	TransactionStatus string
	PaymentMethod     string
	TotalAmount       float64
}