Feature: Config CLI commands
  As a developer
  I want to manage configuration via CLI
  So that I can set, get, and list runtime configuration values

  Background:
    Given a clean config CLI test environment

  # --- SET ---
  Scenario: Set a configuration value
    When I run config set "log_level" "DEBUG"
    Then the config set should succeed
    And the config set output should contain key "log_level"
    And the config set output should contain value "DEBUG"

  Scenario: Set a configuration value with dot-path
    When I run config set "server.port" "9090"
    Then the config set should succeed
    And the config set output should contain key "server_port"

  Scenario: Set an unknown key fails
    When I run config set "nonexistent_key" "value"
    Then the config set should fail with unknown key error

  # --- GET ---
  Scenario: Get a configuration value
    When I run config get "log_level"
    Then the config get should succeed
    And the config get output should contain key "log_level"
    And the config get output should show the resolution chain

  Scenario: Get a value after setting it
    Given I have set config "log_level" to "WARNING"
    When I run config get "log_level"
    Then the config get should succeed

  Scenario: Get with dot-path alias
    When I run config get "server.port"
    Then the config get should succeed
    And the config get output should contain key "server_port"

  Scenario: Get an unknown key fails
    When I run config get "totally_bogus_key"
    Then the config get should fail with unknown key error

  # --- LIST ---
  Scenario: List all configuration values
    When I run config list
    Then the config list should succeed
    And the config list output should contain multiple settings

  Scenario: List with key regex filter
    When I run config list "log.*"
    Then the config list should succeed
    And every listed key should match "log.*"

  Scenario: List with value regex filter
    When I run config list with --filter-values "INFO"
    Then the config list should succeed

  Scenario: List with invalid key regex fails
    When I run config list with invalid regex "[invalid"
    Then the config list should fail with regex error

  Scenario: List with invalid value regex fails
    When I run config list with invalid value regex "[bad"
    Then the config list should fail with regex error

  # --- SECRET MASKING ---
  Scenario: Secret values are masked by default
    When I run config list
    Then secret keys should show masked values

  Scenario: Show-secrets reveals secret values
    When I run config list with --show-secrets
    Then secret keys should show actual values

  # --- RESOLUTION CHAIN ---
  Scenario: Resolution chain shows default source
    When I run config get key "log_level" formatted as "json"
    Then the resolution chain should include "default" source

  # --- SET/GET ROUNDTRIP ---
  Scenario: Set and get roundtrip
    Given I have set config "debug_enabled" to "true"
    When I run config get key "debug_enabled" formatted as "json"
    Then the config get should succeed
    And the get value source should be "config_file"

  # --- FORMAT ---
  Scenario: Config list with JSON format
    When I run config list with format "json"
    Then the config list should succeed
    And the output should be valid JSON

  Scenario: Config get with JSON format
    When I run config get key "env" formatted as "json"
    Then the config get should succeed
    And the output should be valid JSON