// Package orders lets a customer (connected or not, per spec section 17-19)
// place an order directly from the storefront, and lets the admin track
// and update it. Pricing is never trusted from the client: each line is
// resolved against the pricing module's authoritative price tier at
// creation time.
package orders

import (
	"time"

	"github.com/google/uuid"
)

const (
	StatusPending   = "pending"
	StatusConfirmed = "confirmed"
	StatusPreparing = "preparing"
	StatusShipped   = "shipped"
	StatusCompleted = "completed"
	StatusCancelled = "cancelled"
)

var ValidStatuses = map[string]bool{
	StatusPending:   true,
	StatusConfirmed: true,
	StatusPreparing: true,
	StatusShipped:   true,
	StatusCompleted: true,
	StatusCancelled: true,
}

type Order struct {
	ID            uuid.UUID `gorm:"type:uuid;primaryKey"`
	CustomerName  string    `gorm:"not null"`
	CustomerEmail string    `gorm:"not null"`
	CustomerPhone string    `gorm:"not null;default:''"`
	Status        string    `gorm:"not null;default:pending"`
	TotalCents    int64     `gorm:"not null;default:0"`
	Notes         string    `gorm:"not null;default:''"`
	CreatedAt     time.Time
	UpdatedAt     time.Time
}

func (Order) TableName() string { return "orders" }

// OrderItem snapshots the product name, unit symbol and unit price at order
// time, so the order stays accurate even if the product/unit is later
// renamed or deleted.
type OrderItem struct {
	ID             uuid.UUID  `gorm:"type:uuid;primaryKey"`
	OrderID        uuid.UUID  `gorm:"type:uuid;not null;index"`
	ProductID      *uuid.UUID `gorm:"type:uuid"`
	ProductName    string     `gorm:"not null"`
	PriceTierID    *uuid.UUID `gorm:"type:uuid"`
	UnitSymbol     string     `gorm:"not null"`
	TierQuantity   float64    `gorm:"not null"`
	Multiplier     int64      `gorm:"not null;default:1"`
	UnitPriceCents int64      `gorm:"not null"`
	TotalCents     int64      `gorm:"not null"`
	CreatedAt      time.Time
}

func (OrderItem) TableName() string { return "order_items" }