import type { MockInstance } from "vitest";
import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
import Logger from "../logger";

/**
 * This file contains functions helping with TimeRanges management.
 *
 * For simplicity/performance reasons, many of those work with a simplified
 * "Range" object, which is an object with two keys:
 *   - start {Number}
 *   - end {Number}
 *
 * Those two corresponds to what is returned by the start and end methods of a
 * TimeRanges Object.
 *
 * You can convert from TimeRanges to Range object(s) with the getRange/
 * convertToRanges methods.
 */

describe("utils - Logger", () => {
  const logMsgs: unknown[][] = [];
  const errorMsgs: unknown[][] = [];
  const warningMsgs: unknown[][] = [];
  const infoMsgs: unknown[][] = [];
  const debugMsgs: unknown[][] = [];
  let mockLog: MockInstance;
  let mockError: MockInstance;
  let mockWarn: MockInstance;
  let mockInfo: MockInstance;
  let mockDebug: MockInstance;

  beforeEach(() => {
    mockLog = vi.spyOn(console, "log").mockImplementation((...args: unknown[]) => {
      logMsgs.push(args);
    });
    mockError = vi.spyOn(console, "error").mockImplementation((...args: unknown[]) => {
      errorMsgs.push(args);
    });
    mockWarn = vi.spyOn(console, "warn").mockImplementation((...args: unknown[]) => {
      warningMsgs.push(args);
    });
    mockInfo = vi.spyOn(console, "info").mockImplementation((...args: unknown[]) => {
      infoMsgs.push(args);
    });
    mockDebug = vi.spyOn(console, "debug").mockImplementation((...args: unknown[]) => {
      debugMsgs.push(args);
    });
  });

  afterEach(() => {
    mockLog.mockRestore();
    mockError.mockRestore();
    mockWarn.mockRestore();
    mockInfo.mockRestore();
    mockDebug.mockRestore();
    logMsgs.length = 0;
    errorMsgs.length = 0;
    warningMsgs.length = 0;
    infoMsgs.length = 0;
    debugMsgs.length = 0;
  });

  it('should set a default logger level of "NONE"', () => {
    const logger = new Logger();
    expect(logger.getLevel()).toEqual("NONE");
  });

  it('should be able to change the logger level to "ERROR"', () => {
    const logger = new Logger();
    logger.setLevel("ERROR", "standard");
    expect(logger.getLevel()).toEqual("ERROR");
  });

  it('should be able to change the logger level to "WARNING"', () => {
    const logger = new Logger();
    logger.setLevel("WARNING", "standard");
    expect(logger.getLevel()).toEqual("WARNING");
  });

  it('should be able to change the logger level to "INFO"', () => {
    const logger = new Logger();
    logger.setLevel("INFO", "standard");
    expect(logger.getLevel()).toEqual("INFO");
  });

  it('should be able to change the logger level to "DEBUG"', () => {
    const logger = new Logger();
    logger.setLevel("DEBUG", "standard");
    expect(logger.getLevel()).toEqual("DEBUG");
  });

  it("should be able to update the logger level multiple times", () => {
    const logger = new Logger();
    logger.setLevel("DEBUG", "standard");
    expect(logger.getLevel()).toEqual("DEBUG");
    logger.setLevel("WARNING", "standard");
    expect(logger.getLevel()).toEqual("WARNING");
    logger.setLevel("ERROR", "standard");
    expect(logger.getLevel()).toEqual("ERROR");
    logger.setLevel("INFO", "standard");
    expect(logger.getLevel()).toEqual("INFO");
    logger.setLevel("WARNING", "standard");
    expect(logger.getLevel()).toEqual("WARNING");
    logger.setLevel("ERROR", "standard");
    expect(logger.getLevel()).toEqual("ERROR");
  });

  it('should default unrecognized logger levels to "NONE"', () => {
    const logger = new Logger();
    logger.setLevel("TOTO", "standard");
    expect(logger.getLevel()).toEqual("NONE");
    logger.setLevel("DEBUG", "standard"); // initialize to another thing than "NONE"
    logger.setLevel("TITI", "standard");
    expect(logger.getLevel()).toEqual("NONE");
  });

  it('should never call console.* functions if logger level is set to "NONE"', () => {
    const logger = new Logger();
    logger.error("ABR", "test");
    logger.warn("CMCD", "test");
    logger.info("MF", "test");
    logger.debug("SF", "test");
    expect(mockLog).not.toHaveBeenCalled();
    expect(mockError).not.toHaveBeenCalled();
    expect(mockWarn).not.toHaveBeenCalled();
    expect(mockInfo).not.toHaveBeenCalled();
    expect(mockDebug).not.toHaveBeenCalled();
    mockLog.mockRestore();
    mockError.mockRestore();
    mockWarn.mockRestore();
    mockInfo.mockRestore();
    mockDebug.mockRestore();
  });

  it('should only call console.error if logger level is set to "ERROR"', () => {
    const logger = new Logger();
    logger.setLevel("ERROR", "standard");
    logger.error("ABR", "test");
    logger.warn("CMCD", "test");
    logger.info("MF", "test");
    logger.debug("SF", "test");
    expect(mockLog).not.toHaveBeenCalled();
    expect(mockError).toHaveBeenCalled();
    expect(mockWarn).not.toHaveBeenCalled();
    expect(mockInfo).not.toHaveBeenCalled();
    expect(mockDebug).not.toHaveBeenCalled();
    mockLog.mockRestore();
    mockError.mockRestore();
    mockWarn.mockRestore();
    mockInfo.mockRestore();
    mockDebug.mockRestore();
  });

  it('should call console.{error,warn} if logger level is set to "WARNING"', () => {
    const logger = new Logger();
    logger.setLevel("WARNING", "standard");
    logger.error("ABR", "test");
    logger.warn("CMCD", "test");
    logger.info("MF", "test");
    logger.debug("SF", "test");
    expect(mockLog).not.toHaveBeenCalled();
    expect(mockError).toHaveBeenCalled();
    expect(mockWarn).toHaveBeenCalled();
    expect(mockInfo).not.toHaveBeenCalled();
    expect(mockDebug).not.toHaveBeenCalled();
    mockLog.mockRestore();
    mockError.mockRestore();
    mockWarn.mockRestore();
    mockInfo.mockRestore();
    mockDebug.mockRestore();
  });

  it('should call console.{error,warn,info} if logger level is set to "INFO"', () => {
    const logger = new Logger();
    logger.setLevel("INFO", "standard");
    logger.error("ABR", "test");
    logger.warn("CMCD", "test");
    logger.info("MF", "test");
    logger.debug("SF", "test");
    expect(mockLog).not.toHaveBeenCalled();
    expect(mockError).toHaveBeenCalled();
    expect(mockWarn).toHaveBeenCalled();
    expect(mockInfo).toHaveBeenCalled();
    expect(mockDebug).not.toHaveBeenCalled();
    mockLog.mockRestore();
    mockError.mockRestore();
    mockWarn.mockRestore();
    mockInfo.mockRestore();
    mockDebug.mockRestore();
  });

  it('should call console.{error,warn,info, log} if logger level is set to "DEBUG"', () => {
    const logger = new Logger();
    logger.setLevel("DEBUG", "standard");
    logger.error("ABR", "test");
    logger.warn("CMCD", "test");
    logger.info("MF", "test");
    logger.debug("SF", "test");
    expect(mockLog).toHaveBeenCalled();
    expect(mockError).toHaveBeenCalled();
    expect(mockWarn).toHaveBeenCalled();
    expect(mockInfo).toHaveBeenCalled();
    expect(mockDebug).not.toHaveBeenCalled();
    mockLog.mockRestore();
    mockError.mockRestore();
    mockWarn.mockRestore();
    mockInfo.mockRestore();
    mockDebug.mockRestore();
  });

  it('should set a default logger format of "standard"', () => {
    const logger = new Logger();
    expect(logger.getFormat()).toEqual("standard");
  });

  it('should allow setting a format of "full" or "standard"', () => {
    const logger = new Logger();
    expect(logger.getFormat()).toEqual("standard");
    expect(logger.getLevel()).toEqual("NONE");

    logger.setLevel(logger.getLevel(), "full");
    expect(logger.getFormat()).toEqual("full");
    expect(logger.getLevel()).toEqual("NONE");

    logger.setLevel(logger.getLevel(), "standard");
    expect(logger.getFormat()).toEqual("standard");
    expect(logger.getLevel()).toEqual("NONE");
  });

  it('should fallback unknown values to "standard"', () => {
    const logger = new Logger();
    expect(logger.getFormat()).toEqual("standard");

    logger.setLevel(logger.getLevel(), "foo");
    expect(logger.getFormat()).toEqual("standard");

    logger.setLevel(logger.getLevel(), "full");
    expect(logger.getFormat()).toEqual("full");

    logger.setLevel(logger.getLevel(), "foo");
    expect(logger.getFormat()).toEqual("standard");
  });

  it("should be able to change both level and format", () => {
    const logger = new Logger();
    expect(logger.getFormat()).toEqual("standard");
    expect(logger.getLevel()).toEqual("NONE");

    logger.setLevel("foo", "foo");
    expect(logger.getFormat()).toEqual("standard");
    expect(logger.getLevel()).toEqual("NONE");

    logger.setLevel("foo", "full");
    expect(logger.getFormat()).toEqual("full");
    expect(logger.getLevel()).toEqual("NONE");

    logger.setLevel("foo", "foo");
    expect(logger.getFormat()).toEqual("standard");
    expect(logger.getLevel()).toEqual("NONE");

    logger.setLevel("INFO", "foo");
    expect(logger.getFormat()).toEqual("standard");
    expect(logger.getLevel()).toEqual("INFO");

    logger.setLevel("foo", "full");
    expect(logger.getFormat()).toEqual("full");
    expect(logger.getLevel()).toEqual("NONE");

    logger.setLevel("DEBUG", "standard");
    expect(logger.getFormat()).toEqual("standard");
    expect(logger.getLevel()).toEqual("DEBUG");

    logger.setLevel("ERROR", "full");
    expect(logger.getFormat()).toEqual("full");
    expect(logger.getLevel()).toEqual("ERROR");
  });

  it('should format logs with more information when `LogFormat` is set to "full"', () => {
    const logger = new Logger();

    logger.setLevel("DEBUG", "full");
    expect(mockLog).toHaveBeenCalledTimes(1);
    expect(logMsgs).toHaveLength(1);
    expect(logMsgs[0]).toHaveLength(3);
    expect(logMsgs[0][0]).toMatch(/\d+\.\d\d/);
    expect(logMsgs[0][1]).toMatch("[Init]");
    expect(logMsgs[0][2]).toMatch(/Local-Date: \d+/);

    expect(mockError).not.toHaveBeenCalled();
    expect(mockWarn).not.toHaveBeenCalled();
    expect(mockInfo).not.toHaveBeenCalled();
    expect(mockDebug).not.toHaveBeenCalled();

    logger.error("ABR", "teste");
    logger.warn("CMCD", "testw");
    logger.info("MF", "testi");
    logger.debug("SF", "testd");

    expect(mockError).toHaveBeenCalledTimes(1);
    expect(errorMsgs).toHaveLength(1);
    expect(errorMsgs[0]).toHaveLength(4);
    expect(errorMsgs[0][0]).toMatch(/\d+\.\d\d/);
    expect(errorMsgs[0][1]).toMatch(/^\[error\]$/);
    expect(errorMsgs[0][2]).toMatch(/^ABR:$/);
    expect(errorMsgs[0][3]).toMatch(/^teste$/);

    expect(mockWarn).toHaveBeenCalledTimes(1);
    expect(warningMsgs).toHaveLength(1);
    expect(warningMsgs[0]).toHaveLength(4);
    expect(warningMsgs[0][0]).toMatch(/\d+\.\d\d/);
    expect(warningMsgs[0][1]).toMatch(/^\[warn\]$/);
    expect(warningMsgs[0][2]).toMatch(/^CMCD:$/);
    expect(warningMsgs[0][3]).toMatch(/^testw$/);

    expect(mockInfo).toHaveBeenCalledTimes(1);
    expect(infoMsgs).toHaveLength(1);
    expect(infoMsgs[0]).toHaveLength(4);
    expect(infoMsgs[0][0]).toMatch(/\d+\.\d\d/);
    expect(infoMsgs[0][1]).toMatch(/^\[info\]$/);
    expect(infoMsgs[0][2]).toMatch(/^MF:$/);
    expect(infoMsgs[0][3]).toMatch(/^testi$/);

    expect(mockDebug).not.toHaveBeenCalled();

    expect(mockLog).toHaveBeenCalledTimes(2);
    expect(logMsgs[0]).toHaveLength(3);
    expect(logMsgs[0][0]).toMatch(/\d+\.\d\d/);
    expect(logMsgs[0][1]).toMatch(/^\[Init\]$/);
    expect(logMsgs[0][2]).toMatch(/^Local-Date: \d+$/);
    expect(logMsgs[1]).toHaveLength(4);
    expect(logMsgs[1][0]).toMatch(/\d+\.\d\d/);
    expect(logMsgs[1][1]).toMatch(/^\[log\]$/);
    expect(logMsgs[1][2]).toMatch(/^SF:$/);
    expect(logMsgs[1][3]).toMatch(/^testd$/);

    mockLog.mockRestore();
    mockError.mockRestore();
    mockWarn.mockRestore();
    mockInfo.mockRestore();
    mockDebug.mockRestore();
  });
});