#!/usr/bin/env bash
# Clone GitHub Actions to a local mirror directory
# Usage: ./clone-actions.sh <output-directory>

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
ACTIONS_LIST="${SCRIPT_DIR}/actions-to-mirror.txt"

if [[ $# -lt 1 ]]; then
    echo "Usage: $0 <output-directory>"
    echo "Example: $0 ./actions-mirror"
    exit 1
fi

OUTPUT_DIR="$1"

if [[ ! -f "$ACTIONS_LIST" ]]; then
    echo "Error: Actions list not found at $ACTIONS_LIST"
    exit 1
fi

mkdir -p "$OUTPUT_DIR"

clone_action() {
    local entry="$1"
    local org repo version target_dir

    # Parse org/repo@version
    org="${entry%%/*}"
    local repo_version="${entry#*/}"
    repo="${repo_version%%@*}"
    version="${repo_version#*@}"

    # Target directory: org/repo-version (e.g., actions/checkout-v4)
    target_dir="${OUTPUT_DIR}/${org}/${repo}-${version}"

    if [[ -d "$target_dir" ]]; then
        echo "Skipping ${org}/${repo}@${version} (already exists)"
        return 0
    fi

    echo "Cloning ${org}/${repo}@${version}..."

    mkdir -p "$(dirname "$target_dir")"

    # Clone with specific tag/branch, depth 1 for speed
    if ! git clone --depth 1 --branch "$version" \
        "https://github.com/${org}/${repo}.git" "$target_dir" 2>/dev/null; then
        echo "Warning: Failed to clone ${org}/${repo}@${version}"
        return 1
    fi

    # Remove .git directory (we don't want submodules)
    rm -rf "${target_dir}/.git"

    echo "Done: ${org}/${repo}@${version} -> ${target_dir}"
}

echo "Reading actions from $ACTIONS_LIST"
echo "Output directory: $OUTPUT_DIR"
echo ""

success=0
failed=0

while IFS= read -r line || [[ -n "$line" ]]; do
    # Skip empty lines and comments
    [[ -z "$line" || "$line" =~ ^[[:space:]]*# ]] && continue

    # Trim whitespace
    line="$(echo "$line" | xargs)"

    if clone_action "$line"; then
        ((++success))
    else
        ((++failed))
    fi
done < "$ACTIONS_LIST"

echo ""
echo "Complete: $success succeeded, $failed failed"

if [[ $failed -gt 0 ]]; then
    exit 1
fi