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

# =============================================================================
# phase1_teardown.sh — Tear down Gitea on Unraid
# Destructive: stops container, optionally removes all data.
# Prompts for confirmation before each destructive action.
# Safe to run against an already-torn-down instance (no errors).
# =============================================================================

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

# Parse arguments
AUTO_YES=false
for arg in "$@"; do
  case "$arg" in
    --yes|-y) AUTO_YES=true ;;
    --help|-h)
      cat <<EOF
Usage: $(basename "$0") [options]

Options:
  --yes, -y    Skip all confirmation prompts
  --help, -h   Show this help
EOF
      exit 0
      ;;
    *)
      log_error "Unknown argument: $arg"
      exit 1
      ;;
  esac
done

confirm_action() {
  local prompt="$1"
  if [[ "$AUTO_YES" == "true" ]]; then
    log_info "Auto-confirmed (--yes): ${prompt}"
    return 0
  fi
  printf '%s' "$prompt"
  read -r confirm
  [[ "$confirm" =~ ^[Yy]$ ]]
}

load_env
require_vars UNRAID_IP UNRAID_SSH_USER UNRAID_GITEA_DATA_PATH UNRAID_COMPOSE_DIR

DATA_PATH="$UNRAID_GITEA_DATA_PATH"
COMPOSE_DIR="${UNRAID_COMPOSE_DIR}/gitea"

log_warn "=== Phase 1 Teardown: Gitea on Unraid ==="

# Track whether teardown encountered operational errors (not user skips).
TEARDOWN_FAILED=false

# ---------------------------------------------------------------------------
# Step 1: Stop and remove the Gitea container
# ---------------------------------------------------------------------------
# Check if docker-compose file exists (skip if already torn down)
if ssh_exec UNRAID "test -f '${COMPOSE_DIR}/docker-compose.yml'" 2>/dev/null; then
  if confirm_action 'This will stop Gitea on Unraid. Continue? [y/N] '; then
    # Try modern "docker compose" first, fall back to standalone
    if ssh_exec UNRAID "cd '${COMPOSE_DIR}' && docker compose down 2>/dev/null || docker-compose down"; then
      log_success "Gitea container stopped and removed"
    else
      log_error "Failed to stop/remove Gitea container via docker-compose"
      TEARDOWN_FAILED=true
    fi
  else
    log_info "Skipped container shutdown"
  fi
else
  # Safety fallback: compose file may be missing while container still exists.
  existing_container=$(ssh_exec UNRAID "docker ps -a --filter 'name=^/gitea$' --format '{{.ID}}'" 2>/dev/null || true)
  if [[ -n "$existing_container" ]]; then
    log_warn "docker-compose.yml not found, but gitea container still exists."
    if confirm_action 'Force-remove gitea container directly? [y/N] '; then
      if ssh_exec UNRAID "docker rm -f gitea" >/dev/null 2>&1; then
        log_success "Gitea container force-removed"
      else
        log_error "Failed to force-remove gitea container"
        TEARDOWN_FAILED=true
      fi
    else
      log_info "Skipped direct container removal"
    fi
  else
    log_info "No docker-compose.yml found — container already removed"
  fi
fi

# ---------------------------------------------------------------------------
# Step 2: Optionally remove all Gitea data
# This is irreversible — removes repos, database, config, everything.
# ---------------------------------------------------------------------------
running_container=$(ssh_exec UNRAID "docker ps --filter 'name=^/gitea$' --format '{{.ID}}'" 2>/dev/null || true)
if [[ -n "$running_container" ]]; then
  log_warn "Gitea container is still running — refusing to remove data directory."
  log_warn "Stop the container first, then re-run teardown to remove data."
elif ssh_exec UNRAID "test -d '${DATA_PATH}'" 2>/dev/null; then
  if confirm_action "$(printf 'Remove ALL Gitea data at %s? This is IRREVERSIBLE. [y/N] ' "$DATA_PATH")"; then
    if ssh_exec UNRAID "sudo rm -rf '${DATA_PATH}'"; then
      log_success "All Gitea data removed from Unraid"
    else
      log_error "Failed to remove data directory ${DATA_PATH}"
      TEARDOWN_FAILED=true
    fi
  else
    log_info "Data preserved at ${DATA_PATH}"
  fi
else
  log_info "Data directory already removed"
fi

# ---------------------------------------------------------------------------
# Step 3: Clear the auto-populated API token from .env
# The token is useless after teardown — clear it so phase1 generates a new one.
# ---------------------------------------------------------------------------
remaining_container=$(ssh_exec UNRAID "docker ps -a --filter 'name=^/gitea$' --format '{{.ID}}'" 2>/dev/null || true)
if [[ -z "$remaining_container" ]] && [[ -n "${GITEA_ADMIN_TOKEN:-}" ]]; then
  save_env_var "GITEA_ADMIN_TOKEN" ""
  log_success "GITEA_ADMIN_TOKEN cleared from .env"
elif [[ -n "$remaining_container" ]]; then
  log_info "Keeping GITEA_ADMIN_TOKEN in .env because gitea container still exists"
fi

if $TEARDOWN_FAILED; then
  log_error "Phase 1 teardown completed with errors"
  exit 1
fi

log_success "Phase 1 teardown complete"