import Dependencies
import Foundation

/// Represents a vendor branch database model.
///
/// A vendor branch is who purchase orders can be issued to on behalf an `Employee`.
/// They are associated with a particular `Vendor`.
public struct VendorBranch: Codable, Equatable, Identifiable, Sendable {
  public var id: UUID
  public var name: String
  public var vendorID: Vendor.ID
  public var createdAt: Date?
  public var updatedAt: Date?

  public init(
    id: UUID,
    name: String,
    vendorID: Vendor.ID,
    createdAt: Date? = nil,
    updatedAt: Date? = nil
  ) {
    self.id = id
    self.name = name
    self.vendorID = vendorID
    self.createdAt = createdAt
    self.updatedAt = updatedAt
  }
}

public extension VendorBranch {

  /// Represents the fields required to generate a new vendor branch in the database.
  struct Create: Codable, Sendable, Equatable {
    public let name: String
    public let vendorID: Vendor.ID

    public init(name: String, vendorID: Vendor.ID) {
      self.name = name
      self.vendorID = vendorID
    }
  }

  /// Represents the details of a vendor branch, which includes the parent vendor item.
  ///
  /// This is used in several of the views / api routes that require information about both the
  /// vendor branch and it's associated parent vendor item.
  struct Detail: Codable, Equatable, Identifiable, Sendable {
    public var id: UUID
    public var name: String
    public var vendor: Vendor
    public var createdAt: Date?
    public var updatedAt: Date?

    public init(
      id: UUID,
      name: String,
      vendor: Vendor,
      createdAt: Date? = nil,
      updatedAt: Date? = nil
    ) {
      self.id = id
      self.name = name
      self.vendor = vendor
      self.createdAt = createdAt
      self.updatedAt = updatedAt
    }
  }

  /// Represents the fields that are used to update attributes of a vendor branch in the database.
  struct Update: Codable, Sendable, Equatable {
    public let name: String?

    public init(name: String?) {
      self.name = name
    }
  }
}

#if DEBUG
  public extension VendorBranch.Create {

    static func generateMocks(countPerVendor: Int = 3, vendors: [Vendor]) -> [Self] {
      return vendors.reduce(into: [Self]()) { output, vendor in
        output = (0 ... countPerVendor).reduce(into: output) { array, _ in
          array.append(.init(name: RandomNames.cityNames.randomElement()!, vendorID: vendor.id))
        }
      }
    }
  }

#endif