package domain

import (
	"time"

	"github.com/gofrs/uuid/v5"
)

// Tenant represents a B2B actor (pharmacy/distributor) in the marketplace.
type Tenant struct {
	ID            uuid.UUID `db:"id" json:"id"`
	CNPJ          string    `db:"cnpj" json:"cnpj"`
	CorporateName string    `db:"corporate_name" json:"corporate_name"`
	Category      string    `db:"category" json:"category"` // farmacia, distribuidora
	LicenseNumber string    `db:"license_number" json:"license_number"`
	IsVerified    bool      `db:"is_verified" json:"is_verified"`
	// Location
	Latitude  float64 `db:"latitude" json:"latitude"`
	Longitude float64 `db:"longitude" json:"longitude"`
	City      string  `db:"city" json:"city"`
	State     string  `db:"state" json:"state"`
	// Contact & Hours
	Phone          string `db:"phone" json:"phone"`
	OperatingHours string `db:"operating_hours" json:"operating_hours"` // e.g. "Seg-Sex: 08:00-18:00, Sab: 08:00-12:00"
	Is24Hours      bool   `db:"is_24_hours" json:"is_24_hours"`
	// Timestamps
	CreatedAt time.Time `db:"created_at" json:"created_at"`
	UpdatedAt time.Time `db:"updated_at" json:"updated_at"`
}

// Company is an alias for Tenant for backward compatibility.
type Company = Tenant

// Role constants
const (
	RoleAdmin    = "Admin"
	RoleOwner    = "Dono"
	RoleEmployee = "Colaborador"
	RoleDelivery = "Entregador"
)

// User represents an authenticated actor inside a company.
type User struct {
	ID            uuid.UUID `db:"id" json:"id"`
	CompanyID     uuid.UUID `db:"company_id" json:"company_id"`
	Role          string    `db:"role" json:"role"`
	Name          string    `db:"name" json:"name"`
	Username      string    `db:"username" json:"username"`
	Email         string    `db:"email" json:"email"`
	EmailVerified bool      `db:"email_verified" json:"email_verified"`
	PasswordHash  string    `db:"password_hash" json:"-"`
	CreatedAt     time.Time `db:"created_at" json:"created_at"`
	UpdatedAt     time.Time `db:"updated_at" json:"updated_at"`
}

// UserFilter captures listing constraints.
type UserFilter struct {
	CompanyID *uuid.UUID
	Limit     int
	Offset    int
}

// UserPage wraps paginated results.
type UserPage struct {
	Users    []User `json:"users"`
	Total    int64  `json:"total"`
	Page     int    `json:"page"`
	PageSize int    `json:"page_size"`
}

// Product represents a medicine SKU with batch tracking.
type Product struct {
	ID           uuid.UUID `db:"id" json:"id"`
	SellerID     uuid.UUID `db:"seller_id" json:"seller_id"`
	EANCode      string    `db:"ean_code" json:"ean_code"`
	Name         string    `db:"name" json:"name"`
	Description  string    `db:"description" json:"description"`
	Manufacturer string    `db:"manufacturer" json:"manufacturer"`
	Category     string    `db:"category" json:"category"`
	Subcategory  string    `db:"subcategory" json:"subcategory"`
	Batch        string    `db:"batch" json:"batch"`
	ExpiresAt    time.Time `db:"expires_at" json:"expires_at"`
	PriceCents   int64     `db:"price_cents" json:"price_cents"`
	Stock        int64     `db:"stock" json:"stock"`
	Observations string    `db:"observations" json:"observations"`
	CreatedAt    time.Time `db:"created_at" json:"created_at"`
	UpdatedAt    time.Time `db:"updated_at" json:"updated_at"`
}

// InventoryItem exposes stock tracking tied to product batches.
type InventoryItem struct {
	ProductID  uuid.UUID `db:"product_id" json:"product_id"`
	SellerID   uuid.UUID `db:"seller_id" json:"seller_id"`
	Name       string    `db:"name" json:"name"`
	Batch      string    `db:"batch" json:"batch"`
	ExpiresAt  time.Time `db:"expires_at" json:"expires_at"`
	Quantity   int64     `db:"quantity" json:"quantity"`
	PriceCents int64     `db:"price_cents" json:"price_cents"`
	UpdatedAt  time.Time `db:"updated_at" json:"updated_at"`
}

// InventoryFilter allows filtering by expiration window with pagination.
type InventoryFilter struct {
	ExpiringBefore *time.Time
	SellerID       *uuid.UUID
	Limit          int
	Offset         int
}

// InventoryPage wraps paginated inventory results.
type InventoryPage struct {
	Items    []InventoryItem `json:"items"`
	Total    int64           `json:"total"`
	Page     int             `json:"page"`
	PageSize int             `json:"page_size"`
}

// ProductFilter captures product listing constraints.
type ProductFilter struct {
	SellerID *uuid.UUID
	Category string
	Search   string
	Limit    int
	Offset   int
}

// ProductPage wraps paginated product results.
type ProductPage struct {
	Products []Product `json:"products"`
	Total    int64     `json:"total"`
	Page     int       `json:"page"`
	PageSize int       `json:"page_size"`
}

// CompanyFilter captures company/tenant listing constraints.
type CompanyFilter struct {
	Category string
	Search   string
	City     string
	State    string
	Limit    int
	Offset   int
}

// TenantFilter is an alias for CompanyFilter.
type TenantFilter = CompanyFilter

// CompanyPage wraps paginated company/tenant results.
type CompanyPage struct {
	Companies []Company `json:"tenants"`
	Total     int64     `json:"total"`
	Page      int       `json:"page"`
	PageSize  int       `json:"page_size"`
}

// TenantPage is an alias for CompanyPage.
type TenantPage = CompanyPage

// OrderFilter captures order listing constraints.
type OrderFilter struct {
	BuyerID  *uuid.UUID
	SellerID *uuid.UUID
	Status   OrderStatus
	Limit    int
	Offset   int
}

// OrderPage wraps paginated order results.
type OrderPage struct {
	Orders   []Order `json:"orders"`
	Total    int64   `json:"total"`
	Page     int     `json:"page"`
	PageSize int     `json:"page_size"`
}

// InventoryAdjustment records manual stock corrections.
type InventoryAdjustment struct {
	ID        uuid.UUID `db:"id" json:"id"`
	ProductID uuid.UUID `db:"product_id" json:"product_id"`
	Delta     int64     `db:"delta" json:"delta"`
	Reason    string    `db:"reason" json:"reason"`
	CreatedAt time.Time `db:"created_at" json:"created_at"`
}

// Order captures the status lifecycle and payment intent.
type Order struct {
	ID         uuid.UUID       `db:"id" json:"id"`
	BuyerID    uuid.UUID       `db:"buyer_id" json:"buyer_id"`
	SellerID   uuid.UUID       `db:"seller_id" json:"seller_id"`
	Status     OrderStatus     `db:"status" json:"status"`
	TotalCents int64           `db:"total_cents" json:"total_cents"`
	Items      []OrderItem     `json:"items"`
	Shipping   ShippingAddress `json:"shipping"`
	CreatedAt  time.Time       `db:"created_at" json:"created_at"`
	UpdatedAt  time.Time       `db:"updated_at" json:"updated_at"`
}

// OrderItem stores SKU-level batch tracking.
type OrderItem struct {
	ID        uuid.UUID `db:"id" json:"id"`
	OrderID   uuid.UUID `db:"order_id" json:"order_id"`
	ProductID uuid.UUID `db:"product_id" json:"product_id"`
	Quantity  int64     `db:"quantity" json:"quantity"`
	UnitCents int64     `db:"unit_cents" json:"unit_cents"`
	Batch     string    `db:"batch" json:"batch"`
	ExpiresAt time.Time `db:"expires_at" json:"expires_at"`
}

// PaymentPreference wraps the data needed for Mercado Pago split payments.
type PaymentPreference struct {
	OrderID          uuid.UUID `json:"order_id"`
	Gateway          string    `json:"gateway"`
	CommissionPct    float64   `json:"commission_pct"`
	MarketplaceFee   int64     `json:"marketplace_fee"`
	SellerReceivable int64     `json:"seller_receivable"`
	PaymentURL       string    `json:"payment_url"`
}

// PaymentWebhookEvent represents Mercado Pago notifications with split amounts.
type PaymentWebhookEvent struct {
	PaymentID       string    `json:"payment_id"`
	OrderID         uuid.UUID `json:"order_id"`
	Status          string    `json:"status"`
	MarketplaceFee  int64     `json:"marketplace_fee"`
	SellerAmount    int64     `json:"seller_amount"`
	TotalPaidAmount int64     `json:"total_paid_amount"`
}

// PaymentSplitResult echoes the amounts distributed between actors.
type PaymentSplitResult struct {
	OrderID          uuid.UUID `json:"order_id"`
	PaymentID        string    `json:"payment_id"`
	Status           string    `json:"status"`
	MarketplaceFee   int64     `json:"marketplace_fee"`
	SellerReceivable int64     `json:"seller_receivable"`
	TotalPaidAmount  int64     `json:"total_paid_amount"`
}

// ShippingAddress captures delivery details at order time.
type ShippingAddress struct {
	RecipientName string `json:"recipient_name" db:"shipping_recipient_name"`
	Street        string `json:"street" db:"shipping_street"`
	Number        string `json:"number" db:"shipping_number"`
	Complement    string `json:"complement,omitempty" db:"shipping_complement"`
	District      string `json:"district" db:"shipping_district"`
	City          string `json:"city" db:"shipping_city"`
	State         string `json:"state" db:"shipping_state"`
	ZipCode       string `json:"zip_code" db:"shipping_zip_code"`
	Country       string `json:"country" db:"shipping_country"`
}

// ShippingSettings stores configuration for calculating delivery fees.
type ShippingSettings struct {
	VendorID                   uuid.UUID `db:"vendor_id" json:"vendor_id"`
	Active                     bool      `db:"active" json:"active"`
	MaxRadiusKm                float64   `db:"max_radius_km" json:"max_radius_km"`
	PricePerKmCents            int64     `db:"price_per_km_cents" json:"price_per_km_cents"`
	MinFeeCents                int64     `db:"min_fee_cents" json:"min_fee_cents"`
	FreeShippingThresholdCents *int64    `db:"free_shipping_threshold_cents" json:"free_shipping_threshold_cents"`
	PickupActive               bool      `db:"pickup_active" json:"pickup_active"`
	PickupAddress              string    `db:"pickup_address" json:"pickup_address"`
	PickupHours                string    `db:"pickup_hours" json:"pickup_hours"`
	Latitude                   float64   `db:"latitude" json:"latitude"`
	Longitude                  float64   `db:"longitude" json:"longitude"`
	CreatedAt                  time.Time `db:"created_at" json:"created_at"`
	UpdatedAt                  time.Time `db:"updated_at" json:"updated_at"`
}

// Shipment stores freight label data and tracking linkage.
type Shipment struct {
	ID               uuid.UUID `db:"id" json:"id"`
	OrderID          uuid.UUID `db:"order_id" json:"order_id"`
	Carrier          string    `db:"carrier" json:"carrier"`
	TrackingCode     string    `db:"tracking_code" json:"tracking_code"`
	ExternalTracking string    `db:"external_tracking" json:"external_tracking"`
	Status           string    `db:"status" json:"status"`
	CreatedAt        time.Time `db:"created_at" json:"created_at"`
	UpdatedAt        time.Time `db:"updated_at" json:"updated_at"`
}

// ReviewFilter captures review listing constraints.
type ReviewFilter struct {
	Limit  int
	Offset int
}

// ReviewPage wraps paginated review results.
type ReviewPage struct {
	Reviews  []Review `json:"reviews"`
	Total    int64    `json:"total"`
	Page     int      `json:"page"`
	PageSize int      `json:"page_size"`
}

// ShipmentFilter captures shipment listing constraints.
type ShipmentFilter struct {
	Limit  int
	Offset int
}

// ShipmentPage wraps paginated shipment results.
type ShipmentPage struct {
	Shipments []Shipment `json:"shipments"`
	Total     int64      `json:"total"`
	Page      int        `json:"page"`
	PageSize  int        `json:"page_size"`
}

// OrderStatus enumerates supported transitions.
type OrderStatus string

const (
	OrderStatusPending   OrderStatus = "Pendente"
	OrderStatusPaid      OrderStatus = "Pago"
	OrderStatusInvoiced  OrderStatus = "Faturado"
	OrderStatusDelivered OrderStatus = "Entregue"
)

// CartItem stores buyer selections with unit pricing.
type CartItem struct {
	ID          uuid.UUID `db:"id" json:"id"`
	BuyerID     uuid.UUID `db:"buyer_id" json:"buyer_id"`
	ProductID   uuid.UUID `db:"product_id" json:"product_id"`
	Quantity    int64     `db:"quantity" json:"quantity"`
	UnitCents   int64     `db:"unit_cents" json:"unit_cents"`
	ProductName string    `db:"product_name" json:"product_name"`
	Batch       string    `db:"batch" json:"batch"`
	ExpiresAt   time.Time `db:"expires_at" json:"expires_at"`
	CreatedAt   time.Time `db:"created_at" json:"created_at"`
	UpdatedAt   time.Time `db:"updated_at" json:"updated_at"`
}

// CartSummary aggregates cart totals and discounts.
type CartSummary struct {
	Items          []CartItem `json:"items"`
	SubtotalCents  int64      `json:"subtotal_cents"`
	DiscountCents  int64      `json:"discount_cents"`
	TotalCents     int64      `json:"total_cents"`
	DiscountReason string     `json:"discount_reason,omitempty"`
}

// Review captures the buyer feedback for a completed order.
type Review struct {
	ID        uuid.UUID `db:"id" json:"id"`
	OrderID   uuid.UUID `db:"order_id" json:"order_id"`
	BuyerID   uuid.UUID `db:"buyer_id" json:"buyer_id"`
	SellerID  uuid.UUID `db:"seller_id" json:"seller_id"`
	Rating    int       `db:"rating" json:"rating"`
	Comment   string    `db:"comment" json:"comment"`
	CreatedAt time.Time `db:"created_at" json:"created_at"`
}

// CompanyRating exposes the aggregate score for a seller or pharmacy.
type CompanyRating struct {
	CompanyID    uuid.UUID `json:"company_id"`
	AverageScore float64   `json:"average_score"`
	TotalReviews int64     `json:"total_reviews"`
}

// TopProduct aggregates seller performance per SKU.
type TopProduct struct {
	ProductID     uuid.UUID `db:"product_id" json:"product_id"`
	Name          string    `db:"name" json:"name"`
	TotalQuantity int64     `db:"total_quantity" json:"total_quantity"`
	RevenueCents  int64     `db:"revenue_cents" json:"revenue_cents"`
}

// SellerDashboard summarizes commercial metrics for sellers.
type SellerDashboard struct {
	SellerID        uuid.UUID    `json:"seller_id"`
	TotalSalesCents int64        `json:"total_sales_cents"`
	OrdersCount     int64        `json:"orders_count"`
	TopProducts     []TopProduct `json:"top_products"`
	LowStockAlerts  []Product    `json:"low_stock_alerts"`
}

// AdminDashboard surfaces platform-wide KPIs.
type AdminDashboard struct {
	GMVCents      int64     `json:"gmv_cents"`
	NewCompanies  int64     `json:"new_companies"`
	WindowStartAt time.Time `json:"window_start_at"`
}
