import Fluent
import struct Foundation.UUID
import Vapor

final class VendorBranch: Model, @unchecked Sendable {

  static let schema = "vendor_branch"

  @ID(key: .id)
  var id: UUID?

  @Field(key: "name")
  var name: String

  @Timestamp(key: "created_at", on: .create)
  var createdAt: Date?

  @Timestamp(key: "updated_at", on: .update)
  var updatedAt: Date?

  @Parent(key: "vendor_id")
  var vendor: Vendor

  init() {}

  init(id: UUID? = nil, name: String, vendorId: Vendor.IDValue) {
    self.id = id
    self.name = name
    $vendor.id = vendorId
  }

  func toDTO() -> DTO {
    .init(
      id: id,
      name: $name.value,
      vendorId: $vendor.id,
      createdAt: createdAt,
      updatedAt: updatedAt
    )
  }

  func applyUpdates(_ updates: Update) {
    name = updates.name
  }

}

// MARK: - Helpers

extension VendorBranch {
  struct Create: Content {
    var name: String

    func toModel() -> VendorBranch {
      let model = VendorBranch()
      model.name = name
      return model
    }
  }

  struct DTO: Content {
    var id: UUID?
    var name: String?
    var vendorId: Vendor.IDValue?
    let createdAt: Date?
    let updatedAt: Date?

    func toModel() -> VendorBranch {
      let model = VendorBranch()

      model.id = id
      if let name {
        model.name = name
      }
      if let vendorId {
        model.$vendor.id = vendorId
      }
      return model
    }

  }

  struct Migrate: AsyncMigration {
    let name = "CreateVendorBranch"

    func prepare(on database: Database) async throws {
      try await database.schema(VendorBranch.schema)
        .id()
        .field("name", .string, .required)
        .field("vendor_id", .uuid, .required)
        .field("created_at", .datetime)
        .field("updated_at", .datetime)
        .foreignKey("vendor_id", references: Vendor.schema, "id", onDelete: .cascade)
        .create()
    }

    func revert(on database: Database) async throws {
      try await database.schema(VendorBranch.schema).delete()
    }
  }

  struct Update: Content {
    var name: String
  }
}

// MARK: - Validations

extension VendorBranch.Create: Validatable {
  static func validations(_ validations: inout Validations) {
    validations.add("name", as: String.self, is: !.empty)
  }
}

extension VendorBranch.Update: Validatable {
  static func validations(_ validations: inout Validations) {
    validations.add("name", as: String.self, is: !.empty)
  }
}