Feature: TUI Shell Danger Detection
  As a TUI user
  I want dangerous shell commands to be detected and warned about
  So that I can avoid accidentally running destructive commands

  Background:
    Given the shell safety module is imported

  # ── Danger level enum ────────────────────────────────────────────────────

  Scenario: ShellDangerLevel enum has four levels
    Then the ShellDangerLevel enum should have levels LOW MEDIUM HIGH CRITICAL

  Scenario: ShellDangerLevel levels are ordered by severity
    Then LOW should be less severe than MEDIUM
    And MEDIUM should be less severe than HIGH
    And HIGH should be less severe than CRITICAL

  # ── DangerousPattern value object ────────────────────────────────────────

  Scenario: DangerousPattern matches a dangerous command
    Given a DangerousPattern named "test_rm" with pattern "rm -rf" at CRITICAL level
    When I check if "rm -rf /" matches the pattern
    Then the pattern should match

  Scenario: DangerousPattern does not match a safe command
    Given a DangerousPattern named "test_rm" with pattern "rm -rf" at CRITICAL level
    When I check if "ls -la" matches the pattern
    Then the pattern should not match

  Scenario: DangerousPattern is case-insensitive by default
    Given a DangerousPattern named "test_rm" with pattern "rm -rf" at CRITICAL level
    When I check if "RM -RF /" matches the pattern
    Then the pattern should match

  # ── DangerousCommandWarning value object ─────────────────────────────────

  Scenario: DangerousCommandWarning is created from a pattern
    Given a DangerousPattern named "rm_root" with pattern "rm -rf /" at CRITICAL level
    When I create a warning for command "rm -rf /" from the pattern
    Then the warning command should be "rm -rf /"
    And the warning danger level should be CRITICAL
    And the warning message should contain "Critical"
    And the warning message should contain "Dangerous command detected"

  Scenario: DangerousCommandWarning message includes pattern description
    Given a DangerousPattern named "fork_bomb" with pattern ":(){" at CRITICAL level and description "Fork bomb"
    When I create a warning for command ":(){ :|:& };:" from the pattern
    Then the warning message should contain "Fork bomb"

  # ── DangerousPatternDetector ─────────────────────────────────────────────

  Scenario: Detector uses default patterns when none provided
    Given a DangerousPatternDetector with default patterns
    Then the detector should have patterns registered

  Scenario: Detector detects rm -rf root as CRITICAL
    Given a DangerousPatternDetector with default patterns
    When I check the command "rm -rf /"
    Then the command should be detected as dangerous
    And the max danger level should be CRITICAL

  Scenario: Detector detects rm -rf wildcard as CRITICAL
    Given a DangerousPatternDetector with default patterns
    When I check the command "rm -rf /*"
    Then the command should be detected as dangerous
    And the max danger level should be CRITICAL

  Scenario: Detector detects fork bomb as CRITICAL
    Given a DangerousPatternDetector with default patterns
    When I check the command ":(){ :|:& };:"
    Then the command should be detected as dangerous
    And the max danger level should be CRITICAL

  Scenario: Detector detects dd if= as HIGH
    Given a DangerousPatternDetector with default patterns
    When I check the command "dd if=/dev/zero of=/dev/sda"
    Then the command should be detected as dangerous
    And the max danger level should be HIGH

  Scenario: Detector detects mkfs as HIGH
    Given a DangerousPatternDetector with default patterns
    When I check the command "mkfs.ext4 /dev/sdb1"
    Then the command should be detected as dangerous
    And the max danger level should be HIGH

  Scenario: Detector detects chmod 777 as MEDIUM
    Given a DangerousPatternDetector with default patterns
    When I check the command "chmod 777 /etc/passwd"
    Then the command should be detected as dangerous
    And the max danger level should be MEDIUM

  Scenario: Detector detects sudo rm as MEDIUM
    Given a DangerousPatternDetector with default patterns
    When I check the command "sudo rm file.txt"
    Then the command should be detected as dangerous
    And the max danger level should be MEDIUM

  Scenario: Detector detects wget piped to sh as MEDIUM
    Given a DangerousPatternDetector with default patterns
    When I check the command "wget http://example.com/install.sh | sh"
    Then the command should be detected as dangerous
    And the max danger level should be MEDIUM

  Scenario: Detector detects curl piped to sh as MEDIUM
    Given a DangerousPatternDetector with default patterns
    When I check the command "curl http://example.com/install.sh | sh"
    Then the command should be detected as dangerous
    And the max danger level should be MEDIUM

  Scenario: Detector detects curl piped to bash as MEDIUM
    Given a DangerousPatternDetector with default patterns
    When I check the command "curl https://get.example.com | bash"
    Then the command should be detected as dangerous
    And the max danger level should be MEDIUM

  Scenario: Detector detects git push force as LOW
    Given a DangerousPatternDetector with default patterns
    When I check the command "git push --force origin main"
    Then the command should be detected as dangerous
    And the max danger level should be LOW

  Scenario: Safe commands pass through without warnings
    Given a DangerousPatternDetector with default patterns
    When I check the command "ls -la"
    Then the command should not be detected as dangerous

  Scenario: Safe commands - echo passes through
    Given a DangerousPatternDetector with default patterns
    When I check the command "echo hello world"
    Then the command should not be detected as dangerous

  Scenario: Safe commands - git status passes through
    Given a DangerousPatternDetector with default patterns
    When I check the command "git status"
    Then the command should not be detected as dangerous

  Scenario: Safe commands - python script passes through
    Given a DangerousPatternDetector with default patterns
    When I check the command "python script.py"
    Then the command should not be detected as dangerous

  Scenario: check_first returns the first matching warning
    Given a DangerousPatternDetector with default patterns
    When I call check_first on "rm -rf /"
    Then check_first should return a warning
    And the first warning danger level should be CRITICAL

  Scenario: check_first returns None for safe commands
    Given a DangerousPatternDetector with default patterns
    When I call check_first on "ls -la"
    Then check_first should return None

  Scenario: check returns all matching warnings
    Given a DangerousPatternDetector with default patterns
    When I call check on "rm -rf /"
    Then check should return at least one warning

  Scenario: Pattern registry is configurable - add pattern
    Given a DangerousPatternDetector with default patterns
    When I add a custom pattern named "custom_test" with pattern "evil_command" at HIGH level
    And I check the command "evil_command --destroy"
    Then the command should be detected as dangerous

  Scenario: Pattern registry is configurable - remove pattern
    Given a DangerousPatternDetector with default patterns
    When I remove the pattern named "git_push_force"
    And I check the command "git push --force origin main"
    Then the command should not be detected as dangerous

  Scenario: Pattern registry is configurable - replace patterns
    Given a DangerousPatternDetector with default patterns
    When I replace all patterns with a single pattern named "only_one" matching "special_cmd" at LOW level
    And I check the command "rm -rf /"
    Then the command should not be detected as dangerous
    When I check the command "special_cmd"
    Then the command should be detected as dangerous

  Scenario: Detector patterns property returns current registry
    Given a DangerousPatternDetector with default patterns
    Then the detector patterns property should return a tuple

  # ── ShellSafetyService ───────────────────────────────────────────────────

  Scenario: ShellSafetyService allows safe commands
    Given a ShellSafetyService with default settings
    When I check the safety of command "ls -la"
    Then the safety check result should be allowed
    And the safety check warning should be None

  Scenario: ShellSafetyService blocks dangerous commands above block level
    Given a ShellSafetyService with default settings
    When I check the safety of command "rm -rf /"
    Then the safety check result should be blocked
    And the safety check warning should not be None

  Scenario: ShellSafetyService uses warn_callback when provided
    Given a ShellSafetyService with a warn_callback that returns True
    When I check the safety of command "rm -rf /"
    Then the safety check result should be allowed
    And the warn_callback should have been called

  Scenario: ShellSafetyService blocks when warn_callback returns False
    Given a ShellSafetyService with a warn_callback that returns False
    When I check the safety of command "rm -rf /"
    Then the safety check result should be blocked
    And the warn_callback should have been called

  Scenario: ShellSafetyService is_safe returns True for safe commands
    Given a ShellSafetyService with default settings
    When I call is_safe on "echo hello"
    Then is_safe should return True

  Scenario: ShellSafetyService is_safe returns False for dangerous commands
    Given a ShellSafetyService with default settings
    When I call is_safe on "rm -rf /"
    Then is_safe should return False

  Scenario: ShellSafetyService exposes detector property
    Given a ShellSafetyService with default settings
    Then the service detector property should be a DangerousPatternDetector

  Scenario: ShellSafetyService exposes block_level property
    Given a ShellSafetyService with default settings
    Then the service block_level should be MEDIUM

  Scenario: ShellSafetyService accepts extra_patterns
    Given a ShellSafetyService with an extra pattern "custom_danger" matching "forbidden_cmd" at HIGH level
    When I check the safety of command "forbidden_cmd --run"
    Then the safety check result should be blocked

  Scenario: SafetyCheckResult repr includes command and allowed status
    Given a ShellSafetyService with default settings
    When I check the safety of command "ls -la"
    Then the safety check result repr should contain "ls -la"
    And the safety check result repr should contain "allowed=True"