#!/usr/bin/env bash
set -euo pipefail

# === METADATA ===
SCRIPT_NAME="$(basename "$0")"
SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
SKILL_ROOT="$(dirname "$SCRIPT_DIR")"

# === CONFIGURATION ===
: "${NODE_NAME:=node-a}"
: "${GITOPS_ROOT:=$HOME/infrastructure}"
: "${OUTPUT_DIR:=$SKILL_ROOT/outputs}"

# === FUNCTIONS ===
log_info()  { echo "[INFO]  $(date -Iseconds) $*"; }
log_warn()  { echo "[WARN]  $(date -Iseconds) $*" >&2; }

main() {
    log_info "Starting $SCRIPT_NAME (PLAN ONLY - no changes made)..."

    # Expand ~ in GITOPS_ROOT
    GITOPS_ROOT="${GITOPS_ROOT/#\~/$HOME}"

    echo ""
    echo "============================================"
    echo "  GITOPS STRUCTURE PLAN"
    echo "  Node: $NODE_NAME"
    echo "============================================"
    echo ""

    echo "=== Directory Structure ==="
    echo "  $GITOPS_ROOT/"
    echo "  +-- config.git/       (bare repo: infrastructure config)"
    echo "  +-- secrets.git/      (bare repo: encrypted secrets)"
    echo "  +-- manifests.git/    (bare repo: k8s/deployment manifests)"
    echo ""

    echo "=== Branch Structure (each repo) ==="
    echo "  main        - production state"
    echo "  staging     - pre-production testing"
    echo "  dev         - development changes"
    echo ""

    echo "=== Post-Receive Hooks ==="
    echo "  config.git:    Validate YAML on push"
    echo "  secrets.git:   Verify GPG encryption"
    echo "  manifests.git: Validate manifest syntax"
    echo ""

    echo "=== Working Directories ==="
    echo "  After setup, clone repos to working directories:"
    echo "  git clone $GITOPS_ROOT/config.git ~/config"
    echo "  git clone $GITOPS_ROOT/secrets.git ~/secrets"
    echo "  git clone $GITOPS_ROOT/manifests.git ~/manifests"
    echo ""

    # Check for existing repos
    for repo in config secrets manifests; do
        if [[ -d "$GITOPS_ROOT/${repo}.git" ]]; then
            log_warn "$repo.git already exists - apply will skip creation"
        fi
    done

    echo "============================================"
    echo "  To apply: ./scripts/31_gitops_apply.sh"
    echo "  To abort: Do nothing"
    echo "  To rollback: ./scripts/rollback/undo_gitops.sh"
    echo "============================================"

    log_info "Completed $SCRIPT_NAME"
}

[[ "${BASH_SOURCE[0]}" == "$0" ]] && main "$@"