import CasePathsCore
import Foundation
@preconcurrency import URLRouting

public enum ViewRoute: Sendable {

  case employee(EmployeeRoute)
  case login(LoginRoute)
  case purchaseOrder(PurchaseOrderRoute)
  case user(UserRoute)
  case vendor(VendorRoute)
  case vendorBranch(VendorBranchRoute)

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

}

public extension ViewRoute {

  enum EmployeeRoute: Sendable {
    case create(Employee.Create)
    case delete(id: Employee.ID)
    case form
    case get(id: Employee.ID)
    case index
    case select(context: 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)
            Field("active") { Optionally { Bool.parser() } }
          }
          .map(.memberwise(Employee.Create.init))
        }
      }
      Route(.case(Self.index)) {
        Path { rootPath }
        Method.get
      }
      Route(.case(Self.delete(id:))) {
        Path { rootPath; Employee.ID.parser() }
        Method.delete
      }
      Route(.case(Self.get(id:))) {
        Path { rootPath; Employee.ID.parser() }
        Method.get
      }
      Route(.case(Self.update(id:updates:))) {
        Path { rootPath; Employee.ID.parser() }
        Method.put
        Body {
          FormData {
            Field("firstName") { Optionally { CharacterSet.alphanumerics.map(.string) } }
            Field("lastName") { Optionally { CharacterSet.alphanumerics.map(.string) } }
            Field("active") { Optionally { Bool.parser() } }
          }
          .map(.memberwise(Employee.Update.init))
        }
      }
      Route(.case(Self.select(context:))) {
        Path { rootPath; "select" }
        Method.get
        Query {
          Field("context") { SelectContext.parser() }
        }
      }
    }
  }
}

public extension ViewRoute {

  enum LoginRoute: Sendable {
    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 {
          Field("next", default: nil) {
            Optionally { CharacterSet.urlPathAllowed.map(.string) }
          }
        }
      }
      Route(.case(Self.post)) {
        Path { rootPath }
        Method.post
        Body {
          FormData {
            Field("username", .string)
            Field("password", .string)
            Field("next", default: nil) {
              Optionally { 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 extension ViewRoute {
  enum PurchaseOrderRoute: Sendable {
    case create(PurchaseOrder.Create)
    case delete(id: PurchaseOrder.ID)
    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 {
            Field("id") { Optionally { PurchaseOrder.ID.parser() } }
            Field("workOrder") { Optionally { Int.parser() } }
            Field("materials", .string)
            Field("customer", .string)
            Field("truckStock") { Optionally { Bool.parser() } }
            Field("createdByID") { User.ID.parser() }
            Field("createdForID") { Employee.ID.parser() }
            Field("vendorBranchID") { VendorBranch.ID.parser() }
          }
          .map(.memberwise(PurchaseOrder.Create.init))
        }
      }
      Route(.case(Self.delete(id:))) {
        Path { rootPath; Digits() }
        Method.delete
      }

      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 {
      case index(context: Context? = nil, table: Bool? = nil)
      case search(Request)

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

      static let router = OneOf {
        Route(.case(Search.index(context:table:))) {
          rootPath
          Method.get
          Query {
            Field("context", default: .employee) { Optionally { Search.Context.parser() } }
            Field("table", default: nil) { Optionally { Bool.parser() } }
          }
        }
        Route(.case(Search.search)) {
          rootPath
          Method.post
          Body(.json(Search.Request.self))
        }
      }

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

      public struct Request: Codable, 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 extension ViewRoute {

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

}

public extension ViewRoute {
  enum UserRoute: Sendable {
    case create(User.Create)
    case delete(id: User.ID)
    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(.json(User.Create.self))
      }
      Route(.case(Self.delete(id:))) {
        Path { rootPath; User.ID.parser() }
        Method.delete
      }
      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 {
            Field("username") {
              Optionally { CharacterSet.alphanumerics.map(.string) }
            }
            Field("email") {
              Optionally {
                // TODO: Not sure if this is correct.
                Rest().map(.string)
              }
            }
          }
          .map(.memberwise(User.Update.init))
        }
      }
    }
  }
}

public extension ViewRoute {

  enum VendorRoute: Sendable {
    case create(Vendor.Create)
    case delete(id: Vendor.ID)
    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.delete(id:))) {
        Path { rootPath; Vendor.ID.parser() }
        Method.delete
      }
      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 extension ViewRoute {

  enum VendorBranchRoute: Sendable {
    case create(VendorBranch.Create)
    case delete(id: VendorBranch.ID)
    case select(context: ViewRoute.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.delete(id:))) {
        Path { "vendors"; "branches"; VendorBranch.ID.parser() }
        Method.delete
      }
      Route(.case(Self.select(context:))) {
        Path { "vendors"; "branches"; "select" }
        Method.get
        Query {
          Field("context") { SelectContext.parser() }
        }
      }
    }
  }
}