package models

import (
	"encoding/json"
	"time"

	"github.com/google/uuid"
)

// APIError is the standard error envelope across FlatRender services.
type APIError struct {
	Code    string `json:"code"`
	Message string `json:"message"`
}

// ── Client apps (tenants of the broker — each site that pays through it) ───────

type ClientApp struct {
	ID                   uuid.UUID  `json:"id"`
	TenantID             *uuid.UUID `json:"tenant_id,omitempty"`
	Name                 string     `json:"name"`
	Slug                 string     `json:"slug"`
	APIKey               string     `json:"api_key"`
	Secret               string     `json:"secret,omitempty"` // returned only on create / rotate
	ZarinPalMerchantID   *string    `json:"zarinpal_merchant_id,omitempty"`
	ZarinPalSandbox      *bool      `json:"zarinpal_sandbox,omitempty"`
	AllowedReturnOrigins []string   `json:"allowed_return_origins"`
	WebhookURL           *string    `json:"webhook_url,omitempty"`
	IsActive             bool       `json:"is_active"`
	CreatedAt            time.Time  `json:"created_at"`
	UpdatedAt            time.Time  `json:"updated_at"`
}

// ── Transactions ──────────────────────────────────────────────────────────────

type Transaction struct {
	ID              uuid.UUID       `json:"id"`
	ClientAppID     uuid.UUID       `json:"client_app_id"`
	ClientSlug      string          `json:"client_slug,omitempty"` // joined for admin views
	Status          string          `json:"status"`
	Gateway         string          `json:"gateway"`
	AmountRial      int64           `json:"amount_rial"`
	Currency        string          `json:"currency"`
	Description     *string         `json:"description,omitempty"`
	ClientRef       *string         `json:"client_ref,omitempty"`
	ReturnURL       string          `json:"return_url"`
	Metadata        json.RawMessage `json:"metadata,omitempty"`
	PayerMobile     *string         `json:"payer_mobile,omitempty"`
	PayerEmail      *string         `json:"payer_email,omitempty"`
	Authority       *string         `json:"authority,omitempty"`
	RefID           *string         `json:"ref_id,omitempty"`
	CardPan         *string         `json:"card_pan,omitempty"`
	FeeRial         *int64          `json:"fee_rial,omitempty"`
	GatewayResponse json.RawMessage `json:"gateway_response,omitempty"`
	FailureReason   *string         `json:"failure_reason,omitempty"`
	PaidAt          *time.Time      `json:"paid_at,omitempty"`
	FailedAt        *time.Time      `json:"failed_at,omitempty"`
	ExpiresAt       *time.Time      `json:"expires_at,omitempty"`
	CreatedAt       time.Time       `json:"created_at"`
	UpdatedAt       time.Time       `json:"updated_at"`
}

// Transaction status values (kept as plain text — no PG enum, for flexibility).
const (
	StatusCreated   = "Created"
	StatusPending   = "Pending"
	StatusPaid      = "Paid"
	StatusFailed    = "Failed"
	StatusCancelled = "Cancelled"
	StatusExpired   = "Expired"
)

// ── Client-facing request/response shapes ─────────────────────────────────────

// PayRequest is the body a client site POSTs to /v1/pay/request.
type PayRequest struct {
	Amount      int64           `json:"amount"`             // in `currency` units
	Currency    string          `json:"currency,omitempty"` // "IRR" (Rial, default) or "IRT" (Toman)
	Description string          `json:"description,omitempty"`
	ClientRef   string          `json:"client_ref,omitempty"`
	ReturnURL   string          `json:"return_url"`
	Mobile      string          `json:"mobile,omitempty"`
	Email       string          `json:"email,omitempty"`
	Metadata    json.RawMessage `json:"metadata,omitempty"`
}

// PayResponse is returned from /v1/pay/request.
type PayResponse struct {
	ID         uuid.UUID `json:"id"`
	Status     string    `json:"status"`
	PaymentURL string    `json:"payment_url"`
	Authority  string    `json:"authority"`
	AmountRial int64     `json:"amount_rial"`
}

// WebhookPayload is the signed body POSTed to a client's webhook_url.
type WebhookPayload struct {
	Event       string          `json:"event"` // payment.paid | payment.failed
	ID          uuid.UUID       `json:"id"`
	Status      string          `json:"status"`
	AmountRial  int64           `json:"amount_rial"`
	Currency    string          `json:"currency"`
	ClientRef   string          `json:"client_ref,omitempty"`
	RefID       string          `json:"ref_id,omitempty"`
	Authority   string          `json:"authority,omitempty"`
	CardPan     string          `json:"card_pan,omitempty"`
	Metadata    json.RawMessage `json:"metadata,omitempty"`
	PaidAt      *time.Time      `json:"paid_at,omitempty"`
	CreatedAtTs int64           `json:"ts"`
}