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

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

# === CONFIGURATION ===
: "${OUTPUT_DIR:=$SKILL_ROOT/outputs}"

# === FUNCTIONS ===
log_info()  { echo "[INFO]  $(date -Iseconds) $*"; }
log_warn()  { echo "[WARN]  $(date -Iseconds) $*" >&2; }
log_error() { echo "[ERROR] $(date -Iseconds) $*" >&2; }
die()       { log_error "$@"; exit 1; }

main() {
    local last_run_file="$OUTPUT_DIR/last_run_dir.txt"

    if [[ ! -f "$last_run_file" ]]; then
        log_warn "No last run pointer found. Nothing to undo."
        exit 0
    fi

    local run_dir
    run_dir="$(cat "$last_run_file")"

    if [[ ! -d "$run_dir" ]]; then
        log_warn "Run directory does not exist: $run_dir"
        rm -f "$last_run_file"
        exit 0
    fi

    log_warn "This will remove the last backup run:"
    log_warn "  $run_dir"
    echo ""
    echo "Type 'DELETE' to confirm:"
    read -r confirm
    [[ "$confirm" == "DELETE" ]] || die "Aborted."

    # Clean up restore drill temp directory if it exists
    if [[ -f "$run_dir/last_restore_dir.txt" ]]; then
        local restore_dir
        restore_dir="$(cat "$run_dir/last_restore_dir.txt")"
        if [[ -d "$restore_dir" ]]; then
            log_info "Removing restore drill temp: $restore_dir"
            rm -rf "$restore_dir"
        fi
    fi

    log_info "Removing run directory: $run_dir"
    rm -rf "$run_dir"

    log_info "Removing last run pointer"
    rm -f "$last_run_file"

    log_info "Undo complete."
}

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