import XCTest

@testable import ShadowsocksX_NG2

/// 受管插件目录与 Vendor 清单的稳定身份和打包事实保持一致。
final class ManagedPluginCatalogTests: XCTestCase {
  private struct Manifest: Decodable {
    var project: String
    var binary: String
    var bundleSubpath: String
    var signIdentifier: String
  }

  private static let vendorRoot = TestSourceTree.ng2Root().appendingPathComponent("Vendor")

  /// Vendor 下所有插件类清单（bundleSubpath 落在 Helpers/Plugins 的目录）。
  private static var vendorPluginManifests: [(directory: String, manifest: Manifest)] {
    guard
      let directories = try? FileManager.default.contentsOfDirectory(atPath: vendorRoot.path)
    else { return [] }
    return directories.sorted().compactMap { directory in
      let url = vendorRoot.appendingPathComponent(directory).appendingPathComponent("manifest.json")
      guard let data = try? Data(contentsOf: url),
        let manifest = try? JSONDecoder().decode(Manifest.self, from: data),
        manifest.bundleSubpath == "Helpers/Plugins"
      else { return nil }
      return (directory, manifest)
    }
  }

  func testCatalogMatchesVendorPluginManifests() throws {
    let manifests = Self.vendorPluginManifests
    XCTAssertFalse(manifests.isEmpty, "Vendor 下应至少有一个插件清单")
    XCTAssertEqual(
      ManagedPluginCatalog.plugins.count, manifests.count,
      "派生插件目录与 Vendor 插件清单数量不一致（须重新生成派生目录）")
    for (directory, manifest) in manifests {
      let info = try XCTUnwrap(
        ManagedPluginCatalog.plugins.first { $0.program == directory },
        "\(directory): 清单里的记录「\(directory)」不在派生插件目录内")
      XCTAssertEqual(info.executableName, manifest.binary, "\(directory): 打包文件名漂移")
      XCTAssertEqual(info.signIdentifier, manifest.signIdentifier, "\(directory): 重签标识漂移")
    }
  }

  func testEveryCatalogEntryHasVendorManifest() {
    for info in ManagedPluginCatalog.plugins {
      let match = Self.vendorPluginManifests.first { $0.manifest.binary == info.program }
      XCTAssertNotNil(match, "「\(info.program)」在派生插件目录内但缺少 Vendor 插件清单")
    }
  }

  func testProgramLookup() {
    XCTAssertNotNil(ManagedPluginCatalog.info(forProgram: "v2ray-plugin"))
    XCTAssertNil(ManagedPluginCatalog.info(forProgram: "obfs-local"), "集外程序名不在受管集")
    XCTAssertNil(ManagedPluginCatalog.info(forProgram: ""), "空程序名不在受管集")
  }
}