import CasePathsCore
import Foundation
@preconcurrency import URLRouting

public extension SiteRoute {
  // swiftlint:disable type_body_length

  /// Represents view routes that can be interacted with.
  ///
  /// These routes return html and are used to generate the web interface.
  enum View: Sendable, Equatable {

    case employee(SiteRoute.View.EmployeeRoute)
    case login(SiteRoute.View.LoginRoute)
    case purchaseOrder(SiteRoute.View.PurchaseOrderRoute)
    case resetPassword(SiteRoute.View.ResetPasswordRoute)
    case user(SiteRoute.View.UserRoute)
    case vendor(SiteRoute.View.VendorRoute)
    case vendorBranch(SiteRoute.View.VendorBranchRoute)

    public static let router = OneOf {
      Route(.case(Self.employee)) { SiteRoute.View.EmployeeRoute.router }
      Route(.case(Self.login)) { SiteRoute.View.LoginRoute.router }
      Route(.case(Self.purchaseOrder)) { SiteRoute.View.PurchaseOrderRoute.router }
      Route(.case(Self.resetPassword)) { SiteRoute.View.ResetPasswordRoute.router }
      Route(.case(Self.user)) { SiteRoute.View.UserRoute.router }
      Route(.case(Self.vendor)) { SiteRoute.View.VendorRoute.router }
      Route(.case(Self.vendorBranch)) { SiteRoute.View.VendorBranchRoute.router }
    }

    public enum EmployeeRoute: Sendable, Equatable {
      case create(Employee.Create)
      case form
      case get(id: Employee.ID)
      case index
      case select(context: SiteRoute.View.SelectContext)
      case update(id: Employee.ID, updates: Employee.Update)

      static let rootPath = "employees"

      public static let router = OneOf {
        Route(.case(Self.create)) {
          Path { rootPath }
          Method.post
          Body {
            FormData {
              Field("firstName", .string)
              Field("lastName", .string)
              Optionally { Field("active") { Bool.parser() } }
            }
            .map(.memberwise(Employee.Create.init))
          }
        }
        Route(.case(Self.get(id:))) {
          Path { rootPath; Employee.ID.parser() }
          Method.get
        }
        Route(.case(Self.form)) {
          Path { rootPath; "create" }
          Method.get
        }
        Route(.case(Self.index)) {
          Path { rootPath }
          Method.get
        }
        Route(.case(Self.update(id:updates:))) {
          Path { rootPath; Employee.ID.parser() }
          Method.put
          Body {
            FormData {
              Optionally { Field("firstName") { CharacterSet.alphanumerics.map(.string) } }
              Optionally { Field("lastName") { CharacterSet.alphanumerics.map(.string) } }
              Optionally { Field("active") { Bool.parser() } }
            }
            .map(.memberwise(Employee.Update.init))
          }
        }
        Route(.case(Self.select(context:))) {
          Path { rootPath; "select" }
          Method.get
          Query {
            Field("context") { SelectContext.parser() }
          }
        }
      }
    }

    public enum LoginRoute: Sendable, Equatable {
      case index(next: String? = nil)
      case post(Request)

      static let rootPath = "login"

      public static let router = OneOf {
        Route(.case(Self.index)) {
          Method.get
          Path { rootPath }
          Query {
            Optionally {
              Field("next", default: nil) {
                CharacterSet.urlPathAllowed.map(.string)
              }
            }
          }
        }
        Route(.case(Self.post)) {
          Path { rootPath }
          Method.post
          Body {
            FormData {
              Field("username", .string)
              Field("password", .string)
              Optionally {
                Field("next", default: nil) {
                  CharacterSet.urlPathAllowed.map(.string)
                }
              }
            }
            .map(.memberwise(Request.init))
          }
        }
      }

      public struct Request: Codable, Equatable, Sendable {
        public let username: String
        public let password: String
        public let next: String?

        public init(username: String, password: String, next: String? = nil) {
          self.username = username
          self.password = password
          self.next = next
        }
      }
    }

    public enum PurchaseOrderRoute: Sendable, Equatable {
      case create(PurchaseOrder.CreateIntermediate)
      case form
      case get(id: PurchaseOrder.ID)
      case index
      case page(page: Int, limit: Int)
      case search(Search)

      static let rootPath = "purchase-orders"

      public static let router = OneOf {
        Route(.case(Self.create)) {
          Path { rootPath }
          Method.post
          Body {
            FormData {
              Optionally { Field("id") { PurchaseOrder.ID.parser() } }
              Optionally { Field("workOrder") { Int.parser() } }
              Field("materials", .string)
              Field("customer", .string)
              Optionally { Field("truckStock") { Bool.parser() } }
              Field("createdForID") { Employee.ID.parser() }
              Field("vendorBranchID") { VendorBranch.ID.parser() }
            }
            .map(.memberwise(PurchaseOrder.CreateIntermediate.init))
          }
        }
        Route(.case(Self.form)) {
          Path { rootPath; "create" }
          Method.get
        }
        Route(.case(Self.get(id:))) {
          Path { rootPath; Digits() }
          Method.get
        }
        Route(.case(Self.index)) {
          Path { rootPath }
          Method.get
        }
        Route(.case(Self.page(page:limit:))) {
          Path { rootPath; "next" }
          Method.get
          Query {
            Field("page", default: 1) { Digits() }
            Field("limit", default: 25) { Digits() }
          }
        }
        Route(.case(Self.search)) {
          Search.router
        }
      }

      public enum Search: Sendable, Equatable {
        case index(context: Context? = nil, table: Bool? = nil)
        case request(Request)

        static let rootPath = Path { "purchase-orders"; "search" }

        static let router = OneOf {
          Route(.case(Search.index(context:table:))) {
            rootPath
            Method.get
            Query {
              Optionally { Field("context", default: .employee) { Search.Context.parser() } }
              Optionally { Field("table", default: nil) { Bool.parser() } }
            }
          }
          Route(.case(Search.request)) {
            rootPath
            Method.post
            Body {
              FormData {
                Field("context") { Context.parser() }
                Optionally { Field("createdForID") { Employee.ID.parser() } }
                Optionally { Field("customerSearch", .string) }
                Optionally { Field("vendorBranchID") { VendorBranch.ID.parser() } }
              }
              .map(.memberwise(Request.init))
            }
          }
        }

        public enum Context: String, Codable, CaseIterable, Equatable, Sendable {
          case employee
          case customer
          case vendor
        }

        // TODO: Create a validation or potentially turn this into an enum with the valid states.
        public struct Request: Codable, Equatable, Sendable {
          public let context: Context
          public let createdForID: Employee.ID?
          public let customerSearch: String?
          public let vendorBranchID: VendorBranch.ID?

          public init(
            context: Context,
            createdForID: Employee.ID? = nil,
            customerSearch: String? = nil,
            vendorBranchID: VendorBranch.ID? = nil
          ) {
            self.context = context
            self.createdForID = createdForID
            self.customerSearch = customerSearch
            self.vendorBranchID = vendorBranchID
          }
        }
      }
    }

    public enum ResetPasswordRoute: Sendable, Equatable {
      case index(id: User.ID)
      case submit(id: User.ID, request: User.ResetPassword)

      static let rootPath = "reset-password"

      public static let router = OneOf {
        Route(.case(Self.index(id:))) {
          Path { rootPath; User.ID.parser() }
          Method.get
        }
        Route(.case(Self.submit(id:request:))) {
          Path { rootPath; User.ID.parser() }
          Method.patch
          Body {
            FormData {
              Field("password", .string)
              Field("confirmPassword", .string)
            }
            .map(.memberwise(User.ResetPassword.init))
          }
        }
      }
    }

    public enum SelectContext: String, Codable, Equatable, Sendable, CaseIterable {
      case purchaseOrderForm
      case purchaseOrderSearch
    }

    public enum UserRoute: Sendable, Equatable {
      case create(User.Create)
      case form
      case get(id: User.ID)
      case index
      case update(id: User.ID, updates: User.Update)

      static let rootPath = "users"

      public static let router = OneOf {
        Route(.case(Self.create)) {
          Path { rootPath }
          Method.post
          Body {
            FormData {
              Field("username", .string)
              Field("email", .string)
              Field("password", .string)
              Field("confirmPassword", .string)
            }
            .map(.memberwise(User.Create.init))
          }
        }
        Route(.case(Self.form)) {
          Path { rootPath; "create" }
          Method.get
        }
        Route(.case(Self.get(id:))) {
          Path { rootPath; User.ID.parser() }
          Method.get
        }
        Route(.case(Self.index)) {
          Path { rootPath }
          Method.get
        }
        Route(.case(Self.update(id:updates:))) {
          Path { rootPath; User.ID.parser() }
          Method.patch
          Body {
            FormData {
              Optionally { Field("username") {
                CharacterSet.alphanumerics.map(.string)
              }
              }
              Optionally { Field("email", .string) }
            }
            .map(.memberwise(User.Update.init))
          }
        }
      }
    }

    public enum VendorRoute: Sendable, Equatable {
      case create(Vendor.Create)
      case form
      case get(id: Vendor.ID)
      case index
      case update(id: Vendor.ID, updates: Vendor.Update)

      static let rootPath = "vendors"

      public static let router = OneOf {
        Route(.case(Self.create)) {
          Path { rootPath }
          Method.post
          Body {
            FormData {
              Field("name", .string)
            }
            .map(.memberwise(Vendor.Create.init))
          }
        }
        Route(.case(Self.get(id:))) {
          Path { rootPath; Vendor.ID.parser() }
          Method.get
        }

        Route(.case(Self.form)) {
          Path { rootPath; "create" }
          Method.get
        }
        Route(.case(Self.index)) {
          Path { rootPath }
          Method.get
        }
        Route(.case(Self.update(id:updates:))) {
          Path { rootPath; Vendor.ID.parser() }
          Method.put
          Body {
            FormData {
              Field("name", .string)
            }
            .map(.memberwise(Vendor.Update.init))
          }
        }
      }
    }

    public enum VendorBranchRoute: Sendable, Equatable {
      case create(VendorBranch.Create)
      case index(for: Vendor.ID? = nil)
      case select(context: SiteRoute.View.SelectContext)

      public static let router = OneOf {
        Route(.case(Self.create)) {
          Path { "vendors"; "branches" }
          Method.post
          Body {
            FormData {
              Field("name", .string)
              Field("vendorID") { Vendor.ID.parser() }
            }
            .map(.memberwise(VendorBranch.Create.init))
          }
        }
        Route(.case(Self.index(for:))) {
          Path { "vendors"; "branches" }
          Method.get
          Query {
            Optionally { Field("vendorID") { Vendor.ID.parser() } }
          }
        }
        Route(.case(Self.select(context:))) {
          Path { "vendors"; "branches"; "select" }
          Method.get
          Query {
            Field("context") { SiteRoute.View.SelectContext.parser() }
          }
        }
      }
    }
  }
  // swiftlint:enable type_body_length
}