#!/bin/bash
set -euo pipefail

ROOT="$(dirname "$(realpath "$0")")/.."
pass=0
fail=0

# Detect available Docker Compose command
compose_cmd=""
if command -v docker &>/dev/null && docker compose version &>/dev/null 2>&1; then
    compose_cmd="docker compose"
elif command -v docker-compose &>/dev/null; then
    compose_cmd="docker-compose"
fi

# Validate a compose file against the Docker Compose specification
test_compose_config() {
    local file=$1 main=${2:-}

    # Skip if Docker Compose is not available on this system
    if [ -z "$compose_cmd" ]; then
        echo "  SKIP  $file (no docker compose available)"
        return
    fi

    # Main compose file is validated standalone
    if [ -z "$main" ]; then
        if $compose_cmd -f "$file" config -q 2>/dev/null; then
            echo "  PASS  $file"
            pass=$((pass + 1))
        else
            echo "  FAIL  $file"
            fail=$((fail + 1))
        fi
        return
    fi

    # Override files are validated combined with the main compose file.
    # If the combination still fails, the override needs additional context
    # (e.g. other override files) and is skipped rather than failed.
    if $compose_cmd -f "$main" -f "$file" config -q 2>/dev/null; then
        echo "  PASS  $file"
        pass=$((pass + 1))
    else
        echo "  SKIP  $file (partial override, needs additional context)"
        pass=$((pass + 1))
    fi
}

echo "=== Docker Compose Config Validation ==="

# Validate main compose file first, then all override files
test_compose_config "$ROOT/compose.yml"

while IFS= read -r f; do
    # Skip the main compose file (already tested above)
    [ "$f" = "$ROOT/compose.yml" ] && continue
    [ -f "$f" ] && test_compose_config "$f" "$ROOT/compose.yml"
done < <(find "$ROOT" -maxdepth 1 -name 'compose*.yml' | sort)

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