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

/**
 * Tests de sécurité pour les principaux vecteurs d'attaque
 */
describe("security", () => {
  describe("JWT validation", () => {
    it("rejette les tokens JWT malformés", () => {
      const malformedTokens = [
        "invalid",
        "onlyonepart",
        "not.enough.parts.here",
        "",
      ];

      malformedTokens.forEach((token) => {
        // Un JWT valide a exactement 3 parties séparées par des points
        const parts = token.split(".");
        const hasValidStructure =
          parts.length === 3 && parts.every((p) => p.length > 0);
        expect(hasValidStructure).toBe(false);
      });
    });

    it("rejette les tokens JWT expirés", () => {
      const now = Math.floor(Date.now() / 1000);
      const expiredPayload = {
        sub: "user123",
        exp: now - 3600, // Expiré il y a 1 heure
        iat: now - 7200,
      };

      expect(expiredPayload.exp).toBeLessThan(now);
    });

    it("valide les tokens JWT avec la bonne signature", () => {
      const validPayload = {
        sub: "user123",
        exp: Math.floor(Date.now() / 1000) + 3600, // Expire dans 1 heure
        iat: Math.floor(Date.now() / 1000),
      };

      expect(validPayload.exp).toBeGreaterThan(Math.floor(Date.now() / 1000));
    });
  });

  describe("XSS prevention", () => {
    it("échappe les caractères HTML dangereux", () => {
      const dangerous = "<script>alert('xss')</script>";
      const escaped = dangerous
        .replace(/&/g, "&amp;")
        .replace(/</g, "&lt;")
        .replace(/>/g, "&gt;")
        .replace(/"/g, "&quot;")
        .replace(/'/g, "&#x27;");

      expect(escaped).not.toContain("<script>");
      expect(escaped).toContain("&lt;script&gt;");
    });

    it("valide que les usernames ne contiennent pas de scripts", () => {
      const validUsernames = ["JohnDoe", "Player_123", "Alice"];
      const invalidUsernames = [
        "<script>alert('xss')</script>",
        "User<img src=x onerror='alert(1)'>",
        "Test\\x00Null",
      ];

      const usernameRegex = /^[a-zA-Z0-9_\-\.]{3,32}$/;

      validUsernames.forEach((username) => {
        expect(usernameRegex.test(username)).toBe(true);
      });

      invalidUsernames.forEach((username) => {
        expect(usernameRegex.test(username)).toBe(false);
      });
    });

    it("valide les URLs pour éviter les redirections dangereuses", () => {
      const validUrls = [
        "https://rollerlogic.com",
        "https://game.rollerlogic.com",
      ];
      const invalidUrls = [
        "javascript:alert('xss')",
        "data:text/html,<script>alert('xss')</script>",
        "//evil.com",
      ];

      const isValidUrl = (url: string): boolean => {
        try {
          const parsed = new URL(url);
          return (
            parsed.protocol === "https:" &&
            parsed.hostname.endsWith("rollerlogic.com")
          );
        } catch {
          return false;
        }
      };

      validUrls.forEach((url) => {
        expect(isValidUrl(url)).toBe(true);
      });

      invalidUrls.forEach((url) => {
        expect(isValidUrl(url)).toBe(false);
      });
    });
  });

  describe("injection prevention", () => {
    it("échappe les valeurs SQL", () => {
      const escapeSQL = (value: string): string => {
        return value.replace(/'/g, "''").replace(/\\/g, "\\\\");
      };

      const userInput = "'; DROP TABLE users; --";
      const escaped = escapeSQL(userInput);

      // L'échappement remplace les quotes
      expect(escaped).toContain("''");
      // Le texte reste mais est neutralisé par l'échappement (c'est la stratégie)
      expect(escaped).toContain("DROP TABLE");
    });

    it("valide que les paramètres ne contiennent pas de commandes shell", () => {
      const isValidParam = (param: string): boolean => {
        // Rejette les commandes shell dangereuses
        const dangerousPatterns = [/[;&|`$(){}[\]<>\\]/, /^-/, /\.\.\//];
        return !dangerousPatterns.some((pattern) => pattern.test(param));
      };

      expect(isValidParam("normal_param")).toBe(true);
      expect(isValidParam("123")).toBe(true);
      expect(isValidParam("param; rm -rf /")).toBe(false);
      expect(isValidParam("$(whoami)")).toBe(false);
    });

    it("valide les email pour éviter les injections SMTP", () => {
      const isValidEmail = (email: string): boolean => {
        const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
        // Rejette les newlines et autres caractères de contrôle
        return emailRegex.test(email) && !/[\n\r\0]/g.test(email);
      };

      expect(isValidEmail("user@example.com")).toBe(true);
      expect(isValidEmail("user+tag@example.co.uk")).toBe(true);
      expect(isValidEmail("user@example.com\nBcc: attacker@evil.com")).toBe(
        false,
      );
      expect(isValidEmail("user%40example.com")).toBe(false);
    });
  });

  describe("CSRF prevention", () => {
    it("valide les CSRF tokens", () => {
      const validateCSRFToken = (
        token: string,
        sessionToken: string,
      ): boolean => {
        return token === sessionToken && token.length === 32;
      };

      const sessionToken = "a".repeat(32);
      const validToken = sessionToken;
      const invalidToken = "b".repeat(32);

      expect(validateCSRFToken(validToken, sessionToken)).toBe(true);
      expect(validateCSRFToken(invalidToken, sessionToken)).toBe(false);
    });

    it("rejette les requêtes POST sans CSRF token", () => {
      const isSafeMethod = (method: string): boolean => {
        return ["GET", "HEAD", "OPTIONS"].includes(method);
      };

      expect(isSafeMethod("GET")).toBe(true);
      expect(isSafeMethod("POST")).toBe(false);
      expect(isSafeMethod("PUT")).toBe(false);
      expect(isSafeMethod("DELETE")).toBe(false);
    });
  });

  describe("rate limiting", () => {
    it("respecte les limites de débit pour l'authentification", () => {
      const maxAttempts = 5;
      const windowMs = 15 * 60 * 1000; // 15 minutes

      const shouldRateLimit = (
        attempts: number,
        maxAllowed: number,
        lastAttemptTime: number,
        currentTime: number,
      ): boolean => {
        // Reset si on est hors de la fenêtre
        if (currentTime - lastAttemptTime > windowMs) {
          return false;
        }
        return attempts >= maxAllowed;
      };

      const now = Date.now();
      expect(shouldRateLimit(5, maxAttempts, now, now)).toBe(true);
      expect(shouldRateLimit(4, maxAttempts, now, now)).toBe(false);
      expect(shouldRateLimit(10, maxAttempts, now, now + windowMs + 1000)).toBe(
        false,
      );
    });
  });

  describe("password security", () => {
    it("valide la force du mot de passe", () => {
      const isStrongPassword = (password: string): boolean => {
        return (
          password.length >= 12 && // Au moins 12 caractères
          /[a-z]/.test(password) && // Minuscules
          /[A-Z]/.test(password) && // Majuscules
          /[0-9]/.test(password) && // Chiffres
          /[!@#$%^&*]/.test(password) // Caractères spéciaux
        );
      };

      expect(isStrongPassword("WeakPass123")).toBe(false);
      expect(isStrongPassword("StrongPass123!@#")).toBe(true);
      expect(isStrongPassword("Short!@#")).toBe(false);
    });

    it("ne stocke pas les mots de passe en clair", () => {
      const passwords = ["password", "123456", "admin"];
      const hashedExamples = ["$2b$10$...", "sha256:...", "pbkdf2:..."];

      passwords.forEach((pwd) => {
        // Simulé: verifier que ce n'est pas directement comparable
        const isRawPassword = hashedExamples.every((hash) => hash !== pwd);
        expect(isRawPassword).toBe(true);
      });
    });
  });

  describe("authorization checks", () => {
    it("vérifie que les users ne peuvent accéder qu'à leurs données", () => {
      const canAccessUserData = (
        requesterId: number,
        targetUserId: number,
        isAdmin: boolean,
      ): boolean => {
        // Peut accéder si c'est le même user ou si admin
        return requesterId === targetUserId || isAdmin;
      };

      expect(canAccessUserData(1, 1, false)).toBe(true);
      expect(canAccessUserData(1, 2, false)).toBe(false);
      expect(canAccessUserData(1, 2, true)).toBe(true);
    });

    it("empêche l'escalade de privilèges", () => {
      const roles = {
        user: ["read:profile", "write:profile"],
        moderator: [
          "read:profile",
          "write:profile",
          "read:reports",
          "moderate:users",
        ],
        admin: ["*"],
      };

      const hasPermission = (userRole: string, permission: string): boolean => {
        const userPerms = roles[userRole as keyof typeof roles] || [];
        return userPerms.includes(permission) || userPerms.includes("*");
      };

      expect(hasPermission("user", "read:profile")).toBe(true);
      expect(hasPermission("user", "moderate:users")).toBe(false);
      expect(hasPermission("admin", "moderate:users")).toBe(true);
    });
  });

  describe("data validation", () => {
    it("valide les types de données entrantes", () => {
      const validatePayload = (data: any) => {
        const schema = {
          email: (v: any) => typeof v === "string" && v.includes("@"),
          age: (v: any) => typeof v === "number" && v > 0 && v < 150,
          isActive: (v: any) => typeof v === "boolean",
        };

        return Object.entries(schema).every(([key, validator]) => {
          return !data.hasOwnProperty(key) || validator(data[key]);
        });
      };

      expect(
        validatePayload({ email: "test@example.com", age: 25, isActive: true }),
      ).toBe(true);
      expect(validatePayload({ email: "invalid-email", age: 25 })).toBe(false);
      expect(validatePayload({ email: "test@example.com", age: 200 })).toBe(
        false,
      );
    });

    it("limite la taille des payloads", () => {
      const MAX_PAYLOAD_SIZE = 1024 * 100; // 100 KB

      const isValidPayloadSize = (payload: string): boolean => {
        return Buffer.byteLength(payload) <= MAX_PAYLOAD_SIZE;
      };

      const smallPayload = JSON.stringify({ name: "Test" });
      const largePayload = JSON.stringify({
        data: "x".repeat(MAX_PAYLOAD_SIZE + 1),
      });

      expect(isValidPayloadSize(smallPayload)).toBe(true);
      expect(isValidPayloadSize(largePayload)).toBe(false);
    });
  });
});