import { describe, it, expect } from "vitest";
import { validateRemotePath, validateHostConfig } from "../utils/validation";
import { SSHHostConfig } from "../types/server";

describe("Browse E2E Flow", () => {
  const mockHostConfig: SSHHostConfig = {
    host: "browseserver",
    hostName: "browse.example.com",
    user: "browseuser",
    port: 22,
    identityFile: "~/.ssh/browse_key",
  };

  it("should complete full browse workflow with valid inputs", () => {
    // Step 1: Validate remote path (home directory)
    const remotePath = "~";
    const remoteValidation = validateRemotePath(remotePath);
    expect(remoteValidation.valid).toBe(true);
    expect(remoteValidation.error).toBeUndefined();

    // Step 2: Validate host config
    const hostValidation = validateHostConfig(mockHostConfig);
    expect(hostValidation.valid).toBe(true);
    expect(hostValidation.error).toBeUndefined();

    // Step 3: Verify path construction for navigation
    const subdirectory = "documents";
    const constructedPath = remotePath.endsWith("/")
      ? `${remotePath}${subdirectory}`
      : `${remotePath}/${subdirectory}`;
    expect(constructedPath).toBe("~/documents");
  });

  it("should handle absolute remote path", () => {
    const remotePath = "/home/user/documents";
    const remoteValidation = validateRemotePath(remotePath);
    expect(remoteValidation.valid).toBe(true);
    expect(remoteValidation.error).toBeUndefined();

    const hostValidation = validateHostConfig(mockHostConfig);
    expect(hostValidation.valid).toBe(true);
  });

  it("should handle relative remote path", () => {
    const remotePath = "documents/files";
    const remoteValidation = validateRemotePath(remotePath);
    expect(remoteValidation.valid).toBe(true);
    expect(remoteValidation.error).toBeUndefined();
  });

  it("should handle empty remote path (defaults to ~)", () => {
    // In the browse form, empty path defaults to "~"
    const remotePath = "";
    const remotePathValue = remotePath.trim() || "~";
    expect(remotePathValue).toBe("~");

    const remoteValidation = validateRemotePath(remotePathValue);
    expect(remoteValidation.valid).toBe(true);
  });

  it("should construct paths correctly for directory navigation", () => {
    const testCases = [
      { current: "~", subdir: "documents", expected: "~/documents" },
      {
        current: "/home/user",
        subdir: "documents",
        expected: "/home/user/documents",
      },
      {
        current: "/home/user/",
        subdir: "documents",
        expected: "/home/user/documents",
      },
      {
        current: "~/projects",
        subdir: "my-project",
        expected: "~/projects/my-project",
      },
      { current: "/var/www", subdir: "html", expected: "/var/www/html" },
    ];

    testCases.forEach(({ current, subdir, expected }) => {
      const constructedPath = current.endsWith("/")
        ? `${current}${subdir}`
        : `${current}/${subdir}`;
      expect(constructedPath).toBe(expected);
    });
  });

  it("should handle invalid remote path in browse workflow", () => {
    // Try to validate invalid remote path (empty without default)
    const remoteValidation = validateRemotePath("");

    // Should fail validation
    expect(remoteValidation.valid).toBe(false);
    expect(remoteValidation.error).toBeDefined();
    expect(remoteValidation.error).toContain("cannot be empty");
  });

  it("should handle invalid remote path with control characters", () => {
    const invalidPath = "/remote/path\x00/directory";
    const remoteValidation = validateRemotePath(invalidPath);

    // Should fail validation
    expect(remoteValidation.valid).toBe(false);
    expect(remoteValidation.error).toBeDefined();
    expect(remoteValidation.error).toContain("control characters");
  });

  it("should validate all inputs before allowing browse", () => {
    const browseHost: SSHHostConfig = {
      host: "browseserver",
      hostName: "browse.example.com",
      user: "browseuser",
    };

    // All validations should pass
    const remoteValidation = validateRemotePath("~");
    const hostValidation = validateHostConfig(browseHost);

    expect(remoteValidation.valid).toBe(true);
    expect(hostValidation.valid).toBe(true);
  });

  it("should handle host without optional properties", () => {
    const minimalHost: SSHHostConfig = {
      host: "minimal-server",
      hostName: "minimal.example.com",
    };

    // Should validate successfully even without user, port, and identityFile
    const hostValidation = validateHostConfig(minimalHost);
    expect(hostValidation.valid).toBe(true);
  });

  it("should handle various remote path formats for browsing", () => {
    const validPaths = [
      "/absolute/path/directory",
      "relative/path/directory",
      "/path/with spaces/directory",
      "/path/with-dashes/directory",
      "/path/with_underscores/directory",
      "/path/with.dots/directory",
      "~/home/path/directory",
      "~",
    ];

    validPaths.forEach((remotePath) => {
      const validation = validateRemotePath(remotePath);
      expect(validation.valid).toBe(true);
    });
  });

  it("should handle path construction for nested directories", () => {
    // Simulate navigating through multiple directory levels
    let currentPath = "~";
    const directories = ["documents", "projects", "my-app"];

    directories.forEach((dir) => {
      currentPath = currentPath.endsWith("/")
        ? `${currentPath}${dir}`
        : `${currentPath}/${dir}`;
    });

    expect(currentPath).toBe("~/documents/projects/my-app");
  });

  it("should handle path construction with trailing slashes", () => {
    const pathsWithTrailingSlash = [
      {
        path: "/home/user/",
        subdir: "documents",
        expected: "/home/user/documents",
      },
      { path: "~/", subdir: "projects", expected: "~/projects" },
      { path: "/var/www/", subdir: "html", expected: "/var/www/html" },
    ];

    pathsWithTrailingSlash.forEach(({ path, subdir, expected }) => {
      const constructedPath = path.endsWith("/")
        ? `${path}${subdir}`
        : `${path}/${subdir}`;
      expect(constructedPath).toBe(expected);
    });
  });

  it("should validate host config with invalid port", () => {
    const invalidHost: SSHHostConfig = {
      host: "browseserver",
      hostName: "browse.example.com",
      port: 99999, // Invalid port
    };

    const hostValidation = validateHostConfig(invalidHost);
    expect(hostValidation.valid).toBe(false);
    expect(hostValidation.error).toBeDefined();
    expect(hostValidation.error).toContain("must be between 1 and 65535");
  });

  it("should handle missing hostname in host config", () => {
    const hostWithoutHostname: SSHHostConfig = {
      host: "browseserver",
      // hostName is optional, so this should still be valid
    };

    const hostValidation = validateHostConfig(hostWithoutHostname);
    // Hostname is optional, so validation should pass
    expect(hostValidation.valid).toBe(true);
  });

  describe("Remote file listing workflow", () => {
    it("should handle path validation before listing", () => {
      const remotePath = "/home/user/documents";
      const remoteValidation = validateRemotePath(remotePath);
      expect(remoteValidation.valid).toBe(true);

      const hostValidation = validateHostConfig(mockHostConfig);
      expect(hostValidation.valid).toBe(true);

      // Both validations must pass before attempting to list files
      expect(remoteValidation.valid && hostValidation.valid).toBe(true);
    });

    it("should handle home directory path", () => {
      const remotePath = "~";
      const remoteValidation = validateRemotePath(remotePath);
      expect(remoteValidation.valid).toBe(true);
    });

    it("should construct correct paths for file operations", () => {
      const basePath = "/home/user";
      const fileName = "document.txt";
      const filePath = basePath.endsWith("/")
        ? `${basePath}${fileName}`
        : `${basePath}/${fileName}`;
      expect(filePath).toBe("/home/user/document.txt");
    });

    it("should construct correct paths for directory operations", () => {
      const basePath = "/home/user";
      const dirName = "documents";
      const dirPath = basePath.endsWith("/")
        ? `${basePath}${dirName}`
        : `${basePath}/${dirName}`;
      expect(dirPath).toBe("/home/user/documents");
    });
  });

  describe("Error handling in browse workflow", () => {
    it("should reject empty remote path", () => {
      const remoteValidation = validateRemotePath("");
      expect(remoteValidation.valid).toBe(false);
      expect(remoteValidation.error).toBeDefined();
    });

    it("should reject remote path with only whitespace", () => {
      const remoteValidation = validateRemotePath("   ");
      expect(remoteValidation.valid).toBe(false);
      expect(remoteValidation.error).toBeDefined();
    });

    it("should handle invalid host configuration", () => {
      const invalidHost: SSHHostConfig = {
        host: "", // Empty host should fail
        hostName: "example.com",
      };

      const hostValidation = validateHostConfig(invalidHost);
      expect(hostValidation.valid).toBe(false);
    });
  });

  describe("Path normalization", () => {
    it("should handle paths with multiple slashes", () => {
      // In real usage, paths might have multiple slashes that need normalization
      const remotePath = "/home//user///documents";
      const remoteValidation = validateRemotePath(remotePath);
      // Validation should pass (normalization happens at SSH level)
      expect(remoteValidation.valid).toBe(true);
    });

    it("should handle paths with dots", () => {
      const pathsWithDots = [
        "/home/user/./documents",
        "/home/user/../documents",
        "/home/user/././documents",
      ];

      pathsWithDots.forEach((path) => {
        const validation = validateRemotePath(path);
        expect(validation.valid).toBe(true);
      });
    });
  });
});