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// Copyright 2025 Shota FUJI
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// SPDX-License-Identifier: Apache-2.0

import Foundation

public struct RegistryService {
	static let id = "com.roonlabs.registry:1"
}

// MARK: - Get Roon server information

extension RegistryService {
	struct InfoRequest {
		init() {}
	}

	struct InfoResponse: Codable {
		let coreId: String
		let displayName: String
		let version: String

		enum CodingKeys: String, CodingKey {
			case coreId = "core_id"
			case displayName = "display_name"
			case version = "display_version"
		}

		enum DecodeError: Error {
			case invalidBody(Moo.JsonBodyError)
		}

		init(_ msg: Moo) throws(DecodeError) {
			do {
				self = try msg.json(type: Self.self)
			} catch {
				throw .invalidBody(error)
			}
		}
	}
}

extension Moo {
	init(info: RegistryService.InfoRequest) {
		self.init(service: "\(RegistryService.id)/info")
	}
}

// MARK: - Register Roon extension

extension RegistryService {
	public struct RegisterRequest: Codable {
		public let id: String
		public let displayName: String
		public let version: String
		public let publisher: String
		public let email: String
		public let requiredServices: [String]
		public let optionalServices: [String]
		public let providedServices: [String]

		public let token: String?

		public init(
			id: String,
			displayName: String,
			version: String,
			publisher: String,
			email: String,
			requiredServices: [String] = [],
			optionalServices: [String] = [],
			providedServices: [String] = [PingService.id],
			token: String? = nil
		) {
			self.id = id
			self.displayName = displayName
			self.version = version
			self.publisher = publisher
			self.email = email
			self.requiredServices = requiredServices
			self.optionalServices = optionalServices
			self.providedServices = providedServices
			self.token = token
		}

		public enum CodingKeys: String, CodingKey {
			case id = "extension_id"
			case displayName = "display_name"
			case version = "display_version"
			case publisher = "publisher"
			case email = "email"
			case requiredServices = "required_services"
			case optionalServices = "optional_services"
			case providedServices = "provided_services"
			case token = "token"
		}
	}

	public typealias Extension = RegisterRequest

	struct RegisterResponse: Decodable {
		let token: String

		enum DecodeError: Error {
			case unexpectedStatus(String)
			case invalidBody(Moo.JsonBodyError)
		}

		init(_ msg: Moo) throws(DecodeError) {
			guard msg.service == "Registered" else {
				throw .unexpectedStatus(msg.service)
			}

			do {
				self = try msg.json(type: Self.self)
			} catch {
				throw .invalidBody(error)
			}
		}
	}
}

extension Moo {
	init(register: RegistryService.RegisterRequest) throws {
		try self.init(jsonBody: register, service: "\(RegistryService.id)/register")
	}
}