#!/bin/bash
set -euo pipefail

pass=0
fail=0

# Skip if shellcheck is not installed
if ! command -v shellcheck &>/dev/null; then
    echo "=== ShellCheck ==="
    echo "  SKIP  shellcheck not found"
    echo "---"
    echo "Passed: 0  Failed: 0"
    exit 0
fi

# Allow overriding shellcheck options via env var (e.g. -s bash)
EXTRA_SHELLCHECK_OPTS="${SHELLCHECK_OPTS:-}"

# Run shellcheck on a Go template after stripping template tags
shellcheck_tmpl() {
    local tmpl=$1
    # Strip Go template tags ({{ ... }} and {{- ... -}}) into whitespace
    # so shellcheck can parse the remaining bash.
    local cleaned
    cleaned=$(sed 's/{{[-]*[^}]*[-]*}}/true/g' "$tmpl")

    local tmpfile
    tmpfile=$(mktemp)
    printf '%s\n' "$cleaned" > "$tmpfile"

    if shellcheck $EXTRA_SHELLCHECK_OPTS "$tmpfile"; then
        echo "  PASS  $tmpl"
        pass=$((pass + 1))
    else
        echo "  FAIL  $tmpl"
        fail=$((fail + 1))
    fi
    rm -f "$tmpfile"
}

echo "=== ShellCheck ==="
# Lint each template file passed as argument
for f in "$@"; do
    [ -f "$f" ] && shellcheck_tmpl "$f"
done

echo "---"
echo "Passed: $pass  Failed: $fail"
# Exit with failure if any template failed shellcheck
[ "$fail" -eq 0 ]