#!/bin/bash

printf "\nRunning commit-msg hook...\n" >&2

commit_msg_file="$1"
commit_msg=$(head -n1 "$commit_msg_file")

# Skip merge commits
if [[ "$commit_msg" =~ ^Merge\  ]]; then
  echo "Skipping merge commit"
  exit 0
fi

types="add|chore|refactor|test|fix|docs|wip|vapt|debug"
modules="server|common|services|misc|client|inference|actions|providers|engines"

# Pattern:
# type: (module) [optional_submodule] message
pattern="^(${types}): \(${modules}\)( \[[a-z_]+\])? [a-z0-9].+$"

if ! echo "$commit_msg" | grep -Eq "$pattern"; then
  cat <<EOF

Invalid commit message format.

Expected:
  <type>: (<module>) [optional_submodule] message

Rules:
  - type: one of ${types}
  - module: one of ${modules}
  - optional_submodule: lowercase inside []
  - message: lowercase, no leading caps

Valid examples:
  add: (server) [engines] add build engine
  fix: (common) dockerfile issue
  chore: (client) update models
  add: (server) [providers] add s3 reset

EOF
  exit 1
fi

echo "Commit message OK"
exit 0