@_spi(Internal) import CliClient
import ConfigurationClient
import Dependencies
import FileClient
import Foundation
import ShellClient
import Testing
import TestSupport

@Suite("CliClientTests")
struct CliClientTests: TestCase {

  static let loggingOptions: CliClient.LoggingOptions = {
    let levelString = ProcessInfo.processInfo.environment["LOGGING_LEVEL"] ?? "debug"
    let logLevel = Logger.Level(rawValue: levelString) ?? .debug
    return .init(commandName: "CliClientTests", logLevel: logLevel)
  }()

  @Test
  func capturingClient() async throws {
    let captured = CliClient.CapturingClient()
    let client = CliClient.capturing(captured)
    try await client.runCommand(quiet: false, shell: .zsh(), "foo", "bar")

    let quiet = await captured.quiet!
    #expect(quiet == false)

    let shell = await captured.shell
    #expect(shell == .zsh())

    let arguments = await captured.arguments!
    #expect(arguments == ["foo", "bar"])
  }

  @Test(arguments: ["encrypt", "decrypt"])
  func runVault(argument: String) async throws {
    let captured = CliClient.CapturingClient()
    try await withMockConfiguration(captured, key: "runVault") {
      $0.fileClient.findVaultFileInCurrentDirectory = { URL(filePath: "vault.yml") }
    } operation: {
      @Dependency(\.cliClient) var cliClient
      let configuration = Configuration.mock

      try await cliClient.runVaultCommand(
        .init(arguments: [argument], quiet: false, shell: nil),
        logging: Self.loggingOptions
      )

      let shell = await captured.shell
      #expect(shell == .zsh(useDashC: true))

      let vaultPath = URL(filePath: #file)
        .deletingLastPathComponent()
        .deletingLastPathComponent()
        .appending(path: "vault.yml")

      var encryptArgs: [String] = []
      if argument == "encrypt", let id = configuration.vault.encryptId {
        encryptArgs = ["--encrypt-vault-id", id]
      }

      let expectedArguments = [
        "ansible-vault", argument
      ] + configuration.vault.args!
        + encryptArgs
        + [vaultPath.cleanFilePath]

      let arguments = await captured.arguments
      #expect(arguments == expectedArguments)
    }
  }

  @Test(arguments: [
    Configuration(
      args: ["--tags", "debug"],
      useVaultArgs: true,
      playbook: .init(directory: "playbook", inventory: nil),
      vault: .mock
    )
  ])
  func runPlaybook(configuration: Configuration) async throws {
    let captured = CliClient.CapturingClient()
    try await withMockConfiguration(captured, configuration: configuration, key: "runPlaybook") {
      @Dependency(\.cliClient) var cliClient

      try await cliClient.runPlaybookCommand(
        .init(
          arguments: [],
          quiet: false,
          shell: nil
        ),
        logging: Self.loggingOptions
      )

      let expectedArguments = [
        "ansible-playbook", "playbook/main.yml",
        "--inventory", "playbook/inventory.ini",
        "--tags", "debug",
        "--vault-id=myId@$SCRIPTS/vault-gopass-client"
      ]

      let arguments = await captured.arguments
      #expect(arguments == expectedArguments)
    }
  }

  @Test
  func ensuredPlaybookDirectory() throws {
    let configuration = Configuration.mock
    let playbookDir = try configuration.ensuredPlaybookDirectory("playbook")
    #expect(playbookDir == "playbook")

    do {
      _ = try configuration.ensuredPlaybookDirectory(nil)
      #expect(Bool(false))
    } catch {
      #expect(Bool(true))
    }
  }

  @Test
  func shellOrDefault() {
    var shell: String? = "/bin/bash"
    #expect(shell.orDefault == .custom(path: "/bin/bash", useDashC: true))

    shell = nil
    #expect(shell.orDefault == .zsh(useDashC: true))
  }

  @Test
  func testEnsuredInventoryPath() {
    let configuration = Configuration(playbook: .init(inventory: "inventory.ini"))
    let playbookDir = "playbook"
    let inventoryPath = "inventory.ini"

    var output = ensuredInventoryPath(
      inventoryPath,
      configuration: configuration,
      playbookDirectory: playbookDir
    )

    #expect(output == "inventory.ini")

    output = ensuredInventoryPath(
      nil,
      configuration: configuration,
      playbookDirectory: playbookDir
    )
    #expect(output == "inventory.ini")
  }

  @Test
  func vaultFilePath() async throws {
    var fileClient = FileClient.testValue
    fileClient.findVaultFileInCurrentDirectory = { URL(string: "vault.yml") }

    var output = try await fileClient.ensuredVaultFilePath("vault.yml")
    #expect(output == "vault.yml")

    output = try await fileClient.ensuredVaultFilePath(nil)

    fileClient.findVaultFileInCurrentDirectory = { nil }
    do {
      _ = try await fileClient.ensuredVaultFilePath(nil)
      #expect(Bool(false))
    } catch {
      #expect(Bool(true))
    }
  }

  @Test(
    arguments: [
      GenerateJsonTestOption(
        options: .init(
          templateDirectory: nil,
          templateRepo: nil,
          version: nil,
          useLocalTemplateDirectory: true
        ),
        configuration: nil,
        expectation: .failing
      ),
      GenerateJsonTestOption(
        options: .init(
          templateDirectory: nil,
          templateRepo: nil,
          version: nil,
          useLocalTemplateDirectory: false
        ),
        configuration: nil,
        expectation: .failing
      ),
      GenerateJsonTestOption(
        options: .init(
          templateDirectory: "template",
          templateRepo: nil,
          version: nil,
          useLocalTemplateDirectory: true
        ),
        configuration: nil,
        expectation: .success("""
        {
          "template" : {
            "path" : "template"
          }
        }
        """)
      ),
      GenerateJsonTestOption(
        options: .init(
          templateDirectory: nil,
          templateRepo: nil,
          version: nil,
          useLocalTemplateDirectory: false
        ),
        configuration: .init(template: .init(directory: "template")),
        expectation: .success("""
        {
          "template" : {
            "path" : "template"
          }
        }
        """)
      ),
      GenerateJsonTestOption(
        options: .init(
          templateDirectory: nil,
          templateRepo: "https://git.example.com/template.git",
          version: nil,
          useLocalTemplateDirectory: false
        ),
        configuration: nil,
        expectation: .success("""
        {
          "template" : {
            "repo" : {
              "url" : "https://git.example.com/template.git",
              "version" : "main"
            }
          }
        }
        """)
      ),
      GenerateJsonTestOption(
        options: .init(
          templateDirectory: nil,
          templateRepo: nil,
          version: nil,
          useLocalTemplateDirectory: false
        ),
        configuration: .init(template: .init(url: "https://git.example.com/template.git", version: "v0.1.0")),
        expectation: .success("""
        {
          "template" : {
            "repo" : {
              "url" : "https://git.example.com/template.git",
              "version" : "v0.1.0"
            }
          }
        }
        """)
      )
    ]
  )
  func generateJson(input: GenerateJsonTestOption) async {
    await withTestLogger(key: "generateJson") {
      $0.configurationClient = .mock(input.configuration ?? .init())
      $0.cliClient = .liveValue
    } operation: {
      @Dependency(\.cliClient) var cliClient

      let json = try? await cliClient.generateJSON(
        input.options,
        logging: Self.loggingOptions,
        encoder: jsonEncoder
      )

      switch input.expectation {
      case let .success(expected):
        #expect(json == expected)
      case .failing:
        #expect(json == nil)
      }
    }
  }

  func withMockConfiguration(
    _ capturing: CliClient.CapturingClient,
    configuration: Configuration = .mock,
    key: String,
    logLevel: Logger.Level = .trace,
    depednencies setupDependencies: @escaping (inout DependencyValues) -> Void = { _ in },
    operation: @Sendable @escaping () async throws -> Void
  ) async rethrows {
    try await withTestLogger(key: key, logLevel: logLevel) {
      $0.configurationClient = .mock(configuration)
      $0.cliClient = .capturing(capturing)
      setupDependencies(&$0)
    } operation: {
      try await operation()
    }
  }
}

struct GenerateJsonTestOption: Sendable {
  let options: CliClient.GenerateJsonOptions
  let configuration: Configuration?
  let expectation: GenerateJsonExpectation
}

enum GenerateJsonExpectation: Sendable {
  case failing
  case success(String)
}

extension ConfigurationClient {
  static func mock(_ configuration: Configuration) -> Self {
    var mock = Self.testValue
    mock.find = { throw TestError() }
    mock.load = { _ in configuration }
    return mock
  }
}

struct TestError: Error {}

let jsonEncoder: JSONEncoder = {
  let encoder = JSONEncoder()
  encoder.outputFormatting = [.prettyPrinted, .withoutEscapingSlashes, .sortedKeys]
  return encoder
}()