#!/bin/bash
# Block modifications to linter/formatter configuration files
# Event: PreToolUse | Matcher: Edit|Write
# Profile: standard
# Exit 2 = block, Exit 0 = allow

INPUT=$(cat)
FILE_PATH=$(echo "$INPUT" | jq -r '.tool_input.file_path // empty')

if [ -z "$FILE_PATH" ]; then
  exit 0
fi

# Protected config files (linters, formatters, build configs)
PROTECTED_CONFIGS=(
  ".eslintrc"
  ".eslintrc.js"
  ".eslintrc.json"
  ".eslintrc.yml"
  "eslint.config.js"
  "eslint.config.mjs"
  ".prettierrc"
  ".prettierrc.js"
  ".prettierrc.json"
  "prettier.config.js"
  "biome.json"
  "biome.jsonc"
  ".editorconfig"
  "tsconfig.json"
  "tsconfig.base.json"
)

FILENAME=$(basename "$FILE_PATH")

for config in "${PROTECTED_CONFIGS[@]}"; do
  if [ "$FILENAME" = "$config" ]; then
    echo "Blocked: modifying config file '$FILENAME'. These files affect the entire project." >&2
    echo "If this change is intentional, disable this hook: CLAUDE_DISABLED_HOOKS=config-protection.sh" >&2
    exit 2
  fi
done

exit 0