/**
 * Tests for PrivacySettings contract.
 * @module tests/unit/contracts/privacy-settings.test
 */

import {
  PRIVACY_SETTINGS_DEFAULT,
  PRIVACY_SETTINGS_VERSION,
  PRIVACY_SETTING_KEYS,
  FEATURE_NAME_MAP,
  createPrivacySettings,
  isValidPrivacySettings,
  validateSettingKey,
  validateSettingValue,
  validateFeatureName,
} from "../../../src/contracts/privacy-settings.js";

import { describe, it, expect } from "vitest";

describe("privacy-settings contract", () => {
  describe("constants", () => {
    it("should export PRIVACY_SETTINGS_VERSION as 1", () => {
      expect(PRIVACY_SETTINGS_VERSION).toBe(1);
    });

    it("should export PRIVACY_SETTINGS_DEFAULT with all false", () => {
      expect(PRIVACY_SETTINGS_DEFAULT).toEqual({
        reactionCamEnabled: false,
        hpReactiveCamStylingEnabled: false,
      });
    });

    it("should export PRIVACY_SETTING_KEYS as frozen array", () => {
      expect(PRIVACY_SETTING_KEYS).toEqual([
        "reactionCamEnabled",
        "hpReactiveCamStylingEnabled",
      ]);
      expect(Object.isFrozen(PRIVACY_SETTING_KEYS)).toBe(true);
    });

    it("should export FEATURE_NAME_MAP as frozen object", () => {
      expect(FEATURE_NAME_MAP).toEqual({
        reactionCam: "reactionCamEnabled",
        hpReactiveCamStyling: "hpReactiveCamStylingEnabled",
      });
      expect(Object.isFrozen(FEATURE_NAME_MAP)).toBe(true);
    });
  });

  describe("createPrivacySettings", () => {
    it("should return default settings when no overrides provided", () => {
      const result = createPrivacySettings();
      expect(result).toEqual(PRIVACY_SETTINGS_DEFAULT);
    });

    it("should merge overrides with defaults", () => {
      const result = createPrivacySettings({ reactionCamEnabled: true });
      expect(result).toEqual({
        reactionCamEnabled: true,
        hpReactiveCamStylingEnabled: false,
      });
    });

    it("should allow both settings to be overridden", () => {
      const result = createPrivacySettings({
        reactionCamEnabled: true,
        hpReactiveCamStylingEnabled: true,
      });
      expect(result).toEqual({
        reactionCamEnabled: true,
        hpReactiveCamStylingEnabled: true,
      });
    });

    it("should not modify the defaults object", () => {
      const originalDefaults = { ...PRIVACY_SETTINGS_DEFAULT };
      createPrivacySettings({ reactionCamEnabled: true });
      expect(PRIVACY_SETTINGS_DEFAULT).toEqual(originalDefaults);
    });

    it("should ignore extra properties in overrides", () => {
      const result = createPrivacySettings({
        reactionCamEnabled: true,
        extraProp: "should be ignored",
      });
      expect(result).toEqual({
        reactionCamEnabled: true,
        hpReactiveCamStylingEnabled: false,
      });
    });
  });

  describe("isValidPrivacySettings", () => {
    it("should accept valid settings with all false", () => {
      const valid = {
        reactionCamEnabled: false,
        hpReactiveCamStylingEnabled: false,
      };
      expect(isValidPrivacySettings(valid)).toEqual(valid);
    });

    it("should accept valid settings with all true", () => {
      const valid = {
        reactionCamEnabled: true,
        hpReactiveCamStylingEnabled: true,
      };
      expect(isValidPrivacySettings(valid)).toEqual(valid);
    });

    it("should accept valid settings with mixed values", () => {
      const valid = {
        reactionCamEnabled: true,
        hpReactiveCamStylingEnabled: false,
      };
      expect(isValidPrivacySettings(valid)).toEqual(valid);
    });

    it("should throw TypeError for null", () => {
      expect(() => isValidPrivacySettings(null)).toThrow(TypeError);
      expect(() => isValidPrivacySettings(null)).toThrow(
        "PrivacySettings: must be an object"
      );
    });

    it("should throw TypeError for undefined", () => {
      expect(() => isValidPrivacySettings(undefined)).toThrow(TypeError);
      expect(() => isValidPrivacySettings(undefined)).toThrow(
        "PrivacySettings: must be an object"
      );
    });

    it("should throw TypeError for string", () => {
      expect(() => isValidPrivacySettings("invalid")).toThrow(TypeError);
      expect(() => isValidPrivacySettings("invalid")).toThrow(
        "PrivacySettings: must be an object"
      );
    });

    it("should throw TypeError for array", () => {
      expect(() => isValidPrivacySettings([])).toThrow(TypeError);
      expect(() => isValidPrivacySettings([])).toThrow(
        "PrivacySettings: must be an object"
      );
    });

    it("should throw TypeError for unknown keys", () => {
      const invalid = {
        reactionCamEnabled: false,
        hpReactiveCamStylingEnabled: false,
        extraKey: "invalid",
      };
      expect(() => isValidPrivacySettings(invalid)).toThrow(TypeError);
      expect(() => isValidPrivacySettings(invalid)).toThrow("unknown keys");
    });

    it("should throw TypeError when reactionCamEnabled is not boolean", () => {
      const invalid = {
        reactionCamEnabled: "not a boolean",
        hpReactiveCamStylingEnabled: false,
      };
      expect(() => isValidPrivacySettings(invalid)).toThrow(TypeError);
      expect(() => isValidPrivacySettings(invalid)).toThrow(
        "reactionCamEnabled must be a boolean"
      );
    });

    it("should throw TypeError when reactionCamEnabled is a number", () => {
      const invalid = {
        reactionCamEnabled: 1,
        hpReactiveCamStylingEnabled: false,
      };
      expect(() => isValidPrivacySettings(invalid)).toThrow(TypeError);
      expect(() => isValidPrivacySettings(invalid)).toThrow(
        "reactionCamEnabled must be a boolean"
      );
    });

    it("should throw TypeError when hpReactiveCamStylingEnabled is not boolean", () => {
      const invalid = {
        reactionCamEnabled: false,
        hpReactiveCamStylingEnabled: "not a boolean",
      };
      expect(() => isValidPrivacySettings(invalid)).toThrow(TypeError);
      expect(() => isValidPrivacySettings(invalid)).toThrow(
        "hpReactiveCamStylingEnabled must be a boolean"
      );
    });

    it("should throw TypeError when hpReactiveCamStylingEnabled is null", () => {
      const invalid = {
        reactionCamEnabled: false,
        hpReactiveCamStylingEnabled: null,
      };
      expect(() => isValidPrivacySettings(invalid)).toThrow(TypeError);
      expect(() => isValidPrivacySettings(invalid)).toThrow(
        "hpReactiveCamStylingEnabled must be a boolean"
      );
    });

    it("should throw TypeError for missing reactionCamEnabled", () => {
      const invalid = {
        hpReactiveCamStylingEnabled: false,
      };
      expect(() => isValidPrivacySettings(invalid)).toThrow(TypeError);
      expect(() => isValidPrivacySettings(invalid)).toThrow(
        "reactionCamEnabled must be a boolean"
      );
    });

    it("should throw TypeError for missing hpReactiveCamStylingEnabled", () => {
      const invalid = {
        reactionCamEnabled: false,
      };
      expect(() => isValidPrivacySettings(invalid)).toThrow(TypeError);
      expect(() => isValidPrivacySettings(invalid)).toThrow(
        "hpReactiveCamStylingEnabled must be a boolean"
      );
    });
  });

  describe("validateSettingKey", () => {
    it("should accept valid key: reactionCamEnabled", () => {
      expect(validateSettingKey("reactionCamEnabled")).toBe("reactionCamEnabled");
    });

    it("should accept valid key: hpReactiveCamStylingEnabled", () => {
      expect(validateSettingKey("hpReactiveCamStylingEnabled")).toBe(
        "hpReactiveCamStylingEnabled"
      );
    });

    it("should throw TypeError for empty string", () => {
      expect(() => validateSettingKey("")).toThrow(TypeError);
      expect(() => validateSettingKey("")).toThrow(
        "Setting key must be a non-empty string"
      );
    });

    it("should throw TypeError for non-string", () => {
      expect(() => validateSettingKey(123)).toThrow(TypeError);
      expect(() => validateSettingKey(123)).toThrow(
        "Setting key must be a non-empty string"
      );
    });

    it("should throw TypeError for unknown key", () => {
      expect(() => validateSettingKey("unknownKey")).toThrow(TypeError);
      expect(() => validateSettingKey("unknownKey")).toThrow("unknown key");
    });

    it("should throw TypeError for null", () => {
      expect(() => validateSettingKey(null)).toThrow(TypeError);
      expect(() => validateSettingKey(null)).toThrow(
        "Setting key must be a non-empty string"
      );
    });

    it("should throw TypeError for undefined", () => {
      expect(() => validateSettingKey(undefined)).toThrow(TypeError);
      expect(() => validateSettingKey(undefined)).toThrow(
        "Setting key must be a non-empty string"
      );
    });
  });

  describe("validateSettingValue", () => {
    it("should accept true", () => {
      expect(validateSettingValue(true)).toBe(true);
    });

    it("should accept false", () => {
      expect(validateSettingValue(false)).toBe(false);
    });

    it("should throw TypeError for string", () => {
      expect(() => validateSettingValue("true")).toThrow(TypeError);
      expect(() => validateSettingValue("true")).toThrow(
        "value must be a boolean"
      );
    });

    it("should throw TypeError for number", () => {
      expect(() => validateSettingValue(1)).toThrow(TypeError);
      expect(() => validateSettingValue(1)).toThrow(
        "value must be a boolean"
      );
    });

    it("should throw TypeError for null", () => {
      expect(() => validateSettingValue(null)).toThrow(TypeError);
      expect(() => validateSettingValue(null)).toThrow(
        "value must be a boolean"
      );
    });

    it("should throw TypeError for undefined", () => {
      expect(() => validateSettingValue(undefined)).toThrow(TypeError);
      expect(() => validateSettingValue(undefined)).toThrow(
        "value must be a boolean"
      );
    });

    it("should throw TypeError for object", () => {
      expect(() => validateSettingValue({})).toThrow(TypeError);
      expect(() => validateSettingValue({})).toThrow(
        "value must be a boolean"
      );
    });
  });

  describe("validateFeatureName", () => {
    it("should accept valid feature: reactionCam", () => {
      expect(validateFeatureName("reactionCam")).toBe("reactionCam");
    });

    it("should accept valid feature: hpReactiveCamStyling", () => {
      expect(validateFeatureName("hpReactiveCamStyling")).toBe(
        "hpReactiveCamStyling"
      );
    });

    it("should throw TypeError for empty string", () => {
      expect(() => validateFeatureName("")).toThrow(TypeError);
      expect(() => validateFeatureName("")).toThrow(
        "Feature name must be a non-empty string"
      );
    });

    it("should throw TypeError for non-string", () => {
      expect(() => validateFeatureName(123)).toThrow(TypeError);
      expect(() => validateFeatureName(123)).toThrow(
        "Feature name must be a non-empty string"
      );
    });

    it("should throw TypeError for unknown feature", () => {
      expect(() => validateFeatureName("unknownFeature")).toThrow(TypeError);
      expect(() => validateFeatureName("unknownFeature")).toThrow(
        "unknown feature"
      );
    });

    it("should throw TypeError for null", () => {
      expect(() => validateFeatureName(null)).toThrow(TypeError);
      expect(() => validateFeatureName(null)).toThrow(
        "Feature name must be a non-empty string"
      );
    });

    it("should throw TypeError for undefined", () => {
      expect(() => validateFeatureName(undefined)).toThrow(TypeError);
      expect(() => validateFeatureName(undefined)).toThrow(
        "Feature name must be a non-empty string"
      );
    });
  });
});