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

# =============================================================================
# phase11_teardown.sh — Remove custom runner infrastructure deployed by phase 11
# Reverses:
#   1. Repository variables
#   2. Docker runners (per-repo + shared emulator)
#   3. Shared macOS runner → restore original per-repo macOS runners
#   4. Toolchain images on Unraid
# =============================================================================

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

load_env
require_vars GITEA_ADMIN_TOKEN GITEA_INTERNAL_URL GITEA_ORG_NAME

phase_header 11 "Custom Runners — Teardown"

REPO_VARS_CONF="${SCRIPT_DIR}/repo_variables.conf"
AUTO_YES=false

for arg in "$@"; do
  case "$arg" in
    --yes|-y) AUTO_YES=true ;;
    *) ;;
  esac
done

if [[ "$AUTO_YES" != "true" ]]; then
  log_warn "This will remove all phase 11 custom runners and repo variables."
  printf 'Continue? [y/N] ' >&2
  read -r confirm
  if [[ "$confirm" != "y" ]] && [[ "$confirm" != "Y" ]]; then
    log_info "Aborted"
    exit 0
  fi
fi

REMOVED=0
FAILED=0

# =========================================================================
# Step 1: Delete repository variables
# =========================================================================
log_step 1 "Removing repository variables"

if [[ -f "$REPO_VARS_CONF" ]]; then
  while IFS= read -r repo; do
    [[ -z "$repo" ]] && continue
    log_info "--- Removing variables for repo: ${repo} ---"

    # Parse keys from section
    in_section=false
    while IFS= read -r line; do
      line="${line#"${line%%[![:space:]]*}"}"
      line="${line%"${line##*[![:space:]]}"}"
      [[ -z "$line" ]] && continue
      [[ "$line" == \#* ]] && continue
      if [[ "$line" =~ ^\[([^]]+)\] ]]; then
        if [[ "${BASH_REMATCH[1]}" == "$repo" ]]; then
          in_section=true
        elif $in_section; then
          break
        fi
        continue
      fi
      if $in_section && [[ "$line" =~ ^([^=]+)= ]]; then
        k="${BASH_REMATCH[1]}"
        k="${k#"${k%%[![:space:]]*}"}"
        k="${k%"${k##*[![:space:]]}"}"
        if gitea_api DELETE "/repos/${GITEA_ORG_NAME}/${repo}/actions/variables/${k}" >/dev/null 2>&1; then
          log_success "  Deleted ${k} from ${repo}"
          REMOVED=$((REMOVED + 1))
        else
          log_warn "  Could not delete ${k} from ${repo} (may not exist)"
        fi
      fi
    done < "$REPO_VARS_CONF"

  done < <(ini_list_sections "$REPO_VARS_CONF")
else
  log_info "repo_variables.conf not found — skipping"
fi

# =========================================================================
# Step 2: Remove Docker runners
# =========================================================================
log_step 2 "Removing Docker runners"

PHASE11_DOCKER_RUNNERS=(
  unraid-go-node-1
  unraid-go-node-2
  unraid-go-node-3
  unraid-jvm-slim-1
  unraid-jvm-slim-2
  unraid-android-emulator
)

for runner_name in "${PHASE11_DOCKER_RUNNERS[@]}"; do
  log_info "Removing runner '${runner_name}'..."
  if "${SCRIPT_DIR}/manage_runner.sh" remove --name "$runner_name" 2>/dev/null; then
    log_success "Removed ${runner_name}"
    REMOVED=$((REMOVED + 1))
  else
    log_warn "Could not remove ${runner_name} (may not exist)"
  fi
done

# =========================================================================
# Step 3: Remove shared macOS runner, restore original per-repo runners
# =========================================================================
log_step 3 "Restoring original macOS runner configuration"

# Remove shared runner
if launchctl list 2>/dev/null | grep -q "com.gitea.runner.macbook-runner"; then
  log_info "Removing shared macOS runner 'macbook-runner'..."
  "${SCRIPT_DIR}/manage_runner.sh" remove --name macbook-runner 2>/dev/null || true
  REMOVED=$((REMOVED + 1))
fi

# Note: original per-repo macOS runner sections were replaced in runners.conf
# during phase 11. They need to be re-added manually or by re-running
# configure_runners.sh. This teardown only cleans up deployed resources.
log_info "Note: original macOS runner sections (macbook-runner-periodvault,"
log_info "  macbook-runner-intermittent-fasting-tracker) must be restored in"
log_info "  runners.conf manually or via git checkout."

# =========================================================================
# Step 4: Remove toolchain images from Unraid
# =========================================================================
log_step 4 "Removing toolchain images from Unraid"

IMAGES_TO_REMOVE=(
  "go-node-runner:latest"
  "jvm-android-runner:slim"
  "jvm-android-runner:full"
)

for img in "${IMAGES_TO_REMOVE[@]}"; do
  if ssh_exec "UNRAID" "docker rmi '${img}' 2>/dev/null"; then
    log_success "Removed image ${img}"
    REMOVED=$((REMOVED + 1))
  else
    log_warn "Could not remove image ${img} (may not exist or in use)"
  fi
done

# =========================================================================
# Step 5: Remove phase 11 runner sections from runners.conf
# =========================================================================
log_step 5 "Cleaning runners.conf"

RUNNERS_CONF="${SCRIPT_DIR}/runners.conf"
PHASE11_SECTIONS=(
  unraid-go-node-1
  unraid-go-node-2
  unraid-go-node-3
  unraid-jvm-slim-1
  unraid-jvm-slim-2
  unraid-android-emulator
  macbook-runner
)

for section in "${PHASE11_SECTIONS[@]}"; do
  if ini_list_sections "$RUNNERS_CONF" | grep -qx "$section" 2>/dev/null; then
    ini_remove_section "$RUNNERS_CONF" "$section"
    log_success "Removed [${section}] from runners.conf"
    REMOVED=$((REMOVED + 1))
  fi
done

# ---------------------------------------------------------------------------
# Summary
# ---------------------------------------------------------------------------
printf '\n'
log_info "Results: ${REMOVED} items removed, ${FAILED} failures"

if [[ $FAILED -gt 0 ]]; then
  log_error "Some removals failed — check logs above"
  exit 1
fi

log_success "Phase 11 teardown complete"