#!/usr/bin/env bash
# ==============================================================================
#  Git Pre-Push Hook
#  Blocks direct pushes to remote 'main' / 'master' branches.
#  All changes must be submitted via Pull Requests.
# ==============================================================================

set -e

BLOCKED=0

HAS_STDIN=0

# Read stdin passed by git push: <local_ref> <local_sha> <remote_ref> <remote_sha>
while read -r local_ref local_sha remote_ref remote_sha; do
    HAS_STDIN=1
    if [ "$remote_ref" = "refs/heads/main" ] || [ "$remote_ref" = "refs/heads/master" ]; then
        BLOCKED=1
        TARGET_REF="$remote_ref"
        break
    fi
done

# Fallback only if no refs were passed via stdin
if [ "$HAS_STDIN" -eq 0 ] && [ "$BLOCKED" -eq 0 ]; then
    CURRENT_BRANCH=$(git symbolic-ref --short HEAD 2>/dev/null || echo "")
    if [ "$CURRENT_BRANCH" = "main" ] || [ "$CURRENT_BRANCH" = "master" ]; then
        BLOCKED=1
        TARGET_REF="refs/heads/$CURRENT_BRANCH"
    fi
fi

if [ "$BLOCKED" -eq 1 ]; then
    printf "\n\033[0;31m[ERROR]\033[0m Direct push to \033[1m%s\033[0m is blocked.\n" "$TARGET_REF"
    printf "Please create a feature branch and submit a Pull Request:\n\n"
    printf "    git checkout -b feature/your-change\n"
    printf "    git push origin feature/your-change\n\n"
    exit 1
fi

exit 0