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

# =============================================================================
# phase3_teardown.sh — Tear down all runners defined in runners.conf
# For each runner: calls manage_runner.sh remove to stop and clean up.
# Clears GITEA_RUNNER_REGISTRATION_TOKEN from .env since it becomes useless
# after all runners are removed.
# Safe to run against already-torn-down runners (no errors).
# =============================================================================

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
source "${SCRIPT_DIR}/lib/common.sh"

load_env
require_vars GITEA_INTERNAL_URL GITEA_ADMIN_TOKEN ACT_RUNNER_VERSION

log_warn "=== Phase 3 Teardown: Runners ==="

RUNNERS_CONF="${SCRIPT_DIR}/runners.conf"

if [[ ! -f "$RUNNERS_CONF" ]]; then
  log_info "runners.conf not found — nothing to tear down"
  exit 0
fi

# ---------------------------------------------------------------------------
# Step 1: Remove each runner via manage_runner.sh
# manage_runner.sh handles its own safety (skips already-removed runners).
# ---------------------------------------------------------------------------
printf 'This will stop and remove all runners. Continue? [y/N] '
read -r confirm
if [[ "$confirm" =~ ^[Yy]$ ]]; then
  while IFS='|' read -r name rest; do
    # Skip comments and blank lines
    [[ "$name" =~ ^[[:space:]]*# ]] && continue
    [[ -z "$name" ]] && continue

    name=$(echo "$name" | xargs)
    log_info "Removing runner: ${name}"
    "${SCRIPT_DIR}/manage_runner.sh" remove --name "$name" || true
  done < "$RUNNERS_CONF"
  log_success "All runners removed"
else
  log_info "Skipped runner removal"
fi

# ---------------------------------------------------------------------------
# Step 2: Clear the registration token from .env
# The token is single-use in some Gitea configurations — generating a new one
# on next deploy is safer than reusing a potentially stale token.
# ---------------------------------------------------------------------------
if [[ -n "${GITEA_RUNNER_REGISTRATION_TOKEN:-}" ]]; then
  save_env_var "GITEA_RUNNER_REGISTRATION_TOKEN" ""
  log_success "GITEA_RUNNER_REGISTRATION_TOKEN cleared from .env"
fi

log_success "Phase 3 teardown complete"