import { jest, describe, it, expect, beforeEach } from "@jest/globals";

// Mock @actions/core before importing the module under test
const getInputMock = jest.fn<(name: string, options?: { required?: boolean }) => string>();
const getMultilineInputMock =
  jest.fn<(name: string, options?: { required?: boolean }) => string[]>();

jest.unstable_mockModule("@actions/core", () => ({
  getInput: getInputMock,
  getMultilineInput: getMultilineInputMock,
  debug: jest.fn(),
  info: jest.fn(),
  warning: jest.fn(),
}));

// Mock node:fs
const existsSyncMock = jest.fn<(path: string) => boolean>();

jest.unstable_mockModule("node:fs", () => ({
  existsSync: existsSyncMock,
  default: { existsSync: existsSyncMock },
}));

// Dynamic imports after mock setup
const { InputService, InputNames } = await import("./input.service.js");
const { LogLevel } = await import("./logger.service.js");

describe("InputService", () => {
  let service: InstanceType<typeof InputService>;

  beforeEach(() => {
    jest.clearAllMocks();

    getMultilineInputMock.mockImplementation((inputName) => {
      switch (inputName) {
        case InputNames.ComposeFile:
          return ["file1"];
        default:
          return [];
      }
    });

    getInputMock.mockReturnValue("");

    service = new InputService();
  });

  describe("getInputs", () => {
    describe("docker-flags", () => {
      it("should return given docker-flags input", () => {
        getInputMock.mockImplementation((inputName) => {
          switch (inputName) {
            case InputNames.DockerFlags:
              return "docker-flag1 docker-flag2";
            default:
              return "";
          }
        });

        existsSyncMock.mockReturnValue(true);

        const inputs = service.getInputs();

        expect(inputs.dockerFlags).toEqual(["docker-flag1", "docker-flag2"]);
      });

      it("should return empty array when no docker-flags input", () => {
        getInputMock.mockReturnValue("");

        existsSyncMock.mockReturnValue(true);

        const inputs = service.getInputs();

        expect(inputs.dockerFlags).toEqual([]);
      });
    });

    describe("composeFiles", () => {
      it("should return given composeFiles input", () => {
        getMultilineInputMock.mockImplementation((inputName) => {
          switch (inputName) {
            case InputNames.ComposeFile:
              return ["file1", "file2"];
            default:
              return [];
          }
        });

        getInputMock.mockReturnValue("");

        existsSyncMock.mockReturnValue(true);

        const inputs = service.getInputs();

        expect(inputs.composeFiles).toEqual(["file1", "file2"]);
      });

      it("should ignore empty compose file entries", () => {
        getMultilineInputMock.mockImplementation((inputName) => {
          switch (inputName) {
            case InputNames.ComposeFile:
              return ["  ", "file1"];
            default:
              return [];
          }
        });

        getInputMock.mockReturnValue("");
        existsSyncMock.mockReturnValue(true);

        const inputs = service.getInputs();

        expect(inputs.composeFiles).toEqual(["file1"]);
      });

      it("should accept compose file when it exists at the original path", () => {
        getMultilineInputMock.mockImplementation((inputName) => {
          switch (inputName) {
            case InputNames.ComposeFile:
              return ["./compose.yml"];
            default:
              return [];
          }
        });

        getInputMock.mockImplementation((inputName) => {
          switch (inputName) {
            case InputNames.Cwd:
              return "/current/working/directory";
            default:
              return "";
          }
        });

        existsSyncMock.mockImplementation((file) => file === "./compose.yml");

        const inputs = service.getInputs();

        expect(inputs.composeFiles).toEqual(["./compose.yml"]);
      });

      it("should throws an error when a compose file does not exist", () => {
        getMultilineInputMock.mockImplementation((inputName) => {
          switch (inputName) {
            case InputNames.ComposeFile:
              return ["file1", "file2"];
            default:
              return [];
          }
        });

        getInputMock.mockImplementation((inputName) => {
          switch (inputName) {
            case InputNames.Cwd:
              return "/current/working/directory";
            default:
              return "";
          }
        });

        existsSyncMock.mockImplementation((file) => file === "/current/working/directory/file1");

        expect(() => service.getInputs()).toThrow(
          'Compose file not found in "/current/working/directory/file2", "file2"'
        );
      });

      it("should throws an error when no composeFiles input", () => {
        getMultilineInputMock.mockReturnValue([]);

        getInputMock.mockReturnValue("");

        expect(() => service.getInputs()).toThrow("No compose files found");
      });
    });

    describe("services", () => {
      it("should return given services input", () => {
        getMultilineInputMock.mockImplementation((inputName) => {
          switch (inputName) {
            case InputNames.Services:
              return ["service1", "service2"];
            case InputNames.ComposeFile:
              return ["file1"];
            default:
              return [];
          }
        });

        getInputMock.mockReturnValue("");
        existsSyncMock.mockReturnValue(true);

        const inputs = service.getInputs();

        expect(inputs.services).toEqual(["service1", "service2"]);
      });
    });

    describe("compose-flags", () => {
      it("should return given compose-flags input", () => {
        getInputMock.mockImplementation((inputName) => {
          switch (inputName) {
            case InputNames.ComposeFlags:
              return "compose-flag1 compose-flag2";
            default:
              return "";
          }
        });

        existsSyncMock.mockReturnValue(true);

        const inputs = service.getInputs();

        expect(inputs.composeFlags).toEqual(["compose-flag1", "compose-flag2"]);
      });

      it("should return empty array when no compose-flags input", () => {
        getInputMock.mockReturnValue("");

        existsSyncMock.mockReturnValue(true);

        const inputs = service.getInputs();

        expect(inputs.composeFlags).toEqual([]);
      });
    });

    describe("up-flags", () => {
      it("should return given up-flags input", () => {
        getInputMock.mockImplementation((inputName) => {
          switch (inputName) {
            case InputNames.UpFlags:
              return "up-flag1 up-flag2";
            default:
              return "";
          }
        });

        existsSyncMock.mockReturnValue(true);

        const inputs = service.getInputs();

        expect(inputs.upFlags).toEqual(["up-flag1", "up-flag2"]);
      });

      it("should return empty array when no up-flags input", () => {
        getInputMock.mockReturnValue("");

        existsSyncMock.mockReturnValue(true);

        const inputs = service.getInputs();

        expect(inputs.upFlags).toEqual([]);
      });
    });

    describe("down-flags", () => {
      it("should return given down-flags input", () => {
        getInputMock.mockImplementation((inputName) => {
          switch (inputName) {
            case InputNames.DownFlags:
              return "down-flag1 down-flag2";
            default:
              return "";
          }
        });

        existsSyncMock.mockReturnValue(true);

        const inputs = service.getInputs();

        expect(inputs.downFlags).toEqual(["down-flag1", "down-flag2"]);
      });

      it("should return empty array when no down-flags input", () => {
        getInputMock.mockReturnValue("");
        existsSyncMock.mockReturnValue(true);

        const inputs = service.getInputs();

        expect(inputs.downFlags).toEqual([]);
      });
    });

    describe("cwd", () => {
      it("should return given cwd input", () => {
        getInputMock.mockImplementation((inputName) => {
          switch (inputName) {
            case InputNames.Cwd:
              return "cwd";
            default:
              return "";
          }
        });
        existsSyncMock.mockReturnValue(true);

        const inputs = service.getInputs();

        expect(inputs.cwd).toEqual("cwd");
      });
    });

    describe("compose-version", () => {
      it("should return given compose-version input", () => {
        getInputMock.mockImplementation((inputName) => {
          switch (inputName) {
            case InputNames.ComposeVersion:
              return "compose-version";
            default:
              return "";
          }
        });
        existsSyncMock.mockReturnValue(true);

        const inputs = service.getInputs();

        expect(inputs.composeVersion).toEqual("compose-version");
      });
    });

    describe("services-log-level", () => {
      it("should return given services-log-level input", () => {
        getInputMock.mockImplementation((inputName) => {
          switch (inputName) {
            case InputNames.ServiceLogLevel:
              return "info";
            default:
              return "";
          }
        });
        existsSyncMock.mockReturnValue(true);

        const inputs = service.getInputs();
        expect(inputs.serviceLogLevel).toEqual(LogLevel.Info);
      });

      it("should return default services-log-level input", () => {
        getInputMock.mockImplementation((inputName) => {
          switch (inputName) {
            case InputNames.ServiceLogLevel:
              return "";
            default:
              return "";
          }
        });
        existsSyncMock.mockReturnValue(true);

        const inputs = service.getInputs();
        expect(inputs.serviceLogLevel).toEqual(LogLevel.Debug);
      });

      it("should throw an error when services-log-level input is invalid", () => {
        getInputMock.mockImplementation((inputName) => {
          switch (inputName) {
            case InputNames.ServiceLogLevel:
              return "invalid-log-level";
            default:
              return "";
          }
        });
        existsSyncMock.mockReturnValue(true);

        expect(() => service.getInputs()).toThrow(
          'Invalid service log level "invalid-log-level". Valid values are: debug, info'
        );
      });
    });
  });
});