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

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
DEPLOY_DIR="$(cd "${SCRIPT_DIR}/.." && pwd)"
SECRETS_DIR="${DEPLOY_DIR}/secrets"
CONFIG_FILE="${DEPLOY_DIR}/config.yaml"

log() { printf '[init] %s\n' "$*"; }
warn() { printf '[init][warn] %s\n' "$*" >&2; }
die() { printf '[init][error] %s\n' "$*" >&2; exit 1; }

# --- Prerequisites ---

command -v openssl >/dev/null 2>&1 || die "Missing: openssl"
command -v python3 >/dev/null 2>&1 || die "Missing: python3"

echo ""
echo "============================================"
echo "  honeyDue Dev Server — Initial Setup"
echo "============================================"
echo ""
echo "This script will:"
echo "  1. Generate any missing random secrets"
echo "  2. Ask for anything not already filled in"
echo "  3. Create config.yaml with everything filled in"
echo ""

mkdir -p "${SECRETS_DIR}"

# --- Generate random secrets (skip if already exist) ---

generate_if_missing() {
  local file="$1" label="$2" cmd="$3"
  if [[ -f "${file}" && -s "${file}" ]]; then
    log "  ${label} — already exists, keeping"
  else
    eval "${cmd}" > "${file}"
    log "  ${label} — generated"
  fi
}

log "Checking secrets..."
generate_if_missing "${SECRETS_DIR}/secret_key.txt" "secrets/secret_key.txt" "openssl rand -base64 48"
generate_if_missing "${SECRETS_DIR}/postgres_password.txt" "secrets/postgres_password.txt" "openssl rand -base64 24"
generate_if_missing "${SECRETS_DIR}/minio_root_password.txt" "secrets/minio_root_password.txt" "openssl rand -base64 24"
generate_if_missing "${SECRETS_DIR}/email_host_password.txt" "secrets/email_host_password.txt" "echo PLACEHOLDER"
log "  secrets/fcm_server_key.txt — skipped (Android not ready)"
generate_if_missing "${SECRETS_DIR}/apns_auth_key.p8" "secrets/apns_auth_key.p8" "echo ''"

REDIS_PW="$(openssl rand -base64 24)"
log "  Redis password — generated"

# --- Collect only what's missing ---

ask() {
  local var_name="$1" prompt="$2" default="${3:-}"
  local val
  if [[ -n "${default}" ]]; then
    read -rp "${prompt} [${default}]: " val
    val="${val:-${default}}"
  else
    read -rp "${prompt}: " val
  fi
  eval "${var_name}='${val}'"
}

echo ""
echo "--- Server ---"
ask SERVER_HOST "Server IP or SSH alias" "honeyDueDevUpdate"
[[ -n "${SERVER_HOST}" ]] || die "Server host is required"
ask SERVER_USER "SSH user" "root"
ask SSH_KEY "SSH key path" "~/.ssh/id_ed25519"

echo ""
echo "--- Container Registry (GHCR) ---"
ask GHCR_USER "GitHub username" "treytartt"
[[ -n "${GHCR_USER}" ]] || die "GitHub username is required"
ask GHCR_TOKEN "GitHub PAT (read:packages, write:packages)" "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"
[[ -n "${GHCR_TOKEN}" ]] || die "GitHub PAT is required"

echo ""
echo "--- TLS ---"
ask LE_EMAIL "Let's Encrypt email" "treytartt@fastmail.com"

echo ""
echo "--- Admin Panel ---"
ask ADMIN_USER "Admin basic auth username" "admin"
ADMIN_PW="$(openssl rand -base64 16)"

# --- Known values from existing Dokku setup ---

EMAIL_USER="treytartt@fastmail.com"
APNS_KEY_ID="9R5Q7ZX874"
APNS_TEAM_ID="V3PF3M6B6U"

log ""
log "Pre-filled from existing dev server:"
log "  Email user: ${EMAIL_USER}"
log "  APNS Key ID: ${APNS_KEY_ID}"
log "  APNS Team ID: ${APNS_TEAM_ID}"

# --- Generate config.yaml ---

log "Generating config.yaml..."

cat > "${CONFIG_FILE}" <<YAML
# config.yaml — auto-generated by 00-init.sh
# This file is gitignored — never commit it with real values.

# --- Server ---
server:
  host: "${SERVER_HOST}"
  user: "${SERVER_USER}"
  ssh_key: "${SSH_KEY}"

# --- Domains ---
domains:
  api: devapi.myhoneydue.com
  admin: devadmin.myhoneydue.com
  base: dev.myhoneydue.com

# --- Container Registry (GHCR) ---
registry:
  server: ghcr.io
  namespace: "${GHCR_USER}"
  username: "${GHCR_USER}"
  token: "${GHCR_TOKEN}"

# --- Database (in-cluster PostgreSQL) ---
database:
  name: honeydue_dev
  user: honeydue
  max_open_conns: 10
  max_idle_conns: 5
  max_lifetime: "600s"

# --- Email (Fastmail) ---
email:
  host: smtp.fastmail.com
  port: 587
  user: "${EMAIL_USER}"
  from: "honeyDue DEV <${EMAIL_USER}>"
  use_tls: true

# --- Push Notifications ---
push:
  apns_key_id: "${APNS_KEY_ID}"
  apns_team_id: "${APNS_TEAM_ID}"
  apns_topic: com.tt.honeyDue
  apns_production: false
  apns_use_sandbox: true

# --- Object Storage (in-cluster MinIO) ---
storage:
  minio_root_user: honeydue
  bucket: honeydue-dev
  max_file_size: 10485760
  allowed_types: "image/jpeg,image/png,image/gif,image/webp,application/pdf"

# --- Worker Schedules (UTC hours) ---
worker:
  task_reminder_hour: 14
  overdue_reminder_hour: 15
  daily_digest_hour: 3

# --- Feature Flags ---
features:
  push_enabled: true
  email_enabled: false
  webhooks_enabled: false
  onboarding_emails_enabled: false
  pdf_reports_enabled: true
  worker_enabled: true

# --- Redis ---
redis:
  password: "${REDIS_PW}"

# --- Admin Panel ---
admin:
  basic_auth_user: "${ADMIN_USER}"
  basic_auth_password: "${ADMIN_PW}"

# --- TLS ---
tls:
  mode: letsencrypt
  letsencrypt_email: "${LE_EMAIL}"

# --- Apple Auth / IAP ---
apple_auth:
  client_id: "com.tt.honeyDue"
  team_id: "${APNS_TEAM_ID}"
  iap_key_id: ""
  iap_issuer_id: ""
  iap_bundle_id: ""
  iap_key_path: ""
  iap_sandbox: true

# --- Google Auth / IAP ---
google_auth:
  client_id: ""
  android_client_id: ""
  ios_client_id: ""
  iap_package_name: ""
  iap_service_account_path: ""
YAML

# --- Summary ---

echo ""
echo "============================================"
echo "  Setup Complete"
echo "============================================"
echo ""
echo "Generated:"
echo "  config.yaml"
echo "  secrets/secret_key.txt"
echo "  secrets/postgres_password.txt"
echo "  secrets/minio_root_password.txt"
echo "  secrets/email_host_password.txt"
echo "  secrets/fcm_server_key.txt"
echo "  secrets/apns_auth_key.p8"
echo ""
echo "Admin panel credentials:"
echo "  Username: ${ADMIN_USER}"
echo "  Password: ${ADMIN_PW}"
echo "  (save these — they won't be shown again)"
echo ""
echo "Next steps:"
echo "  ./scripts/01-setup-k3s.sh"
echo "  ./scripts/02-setup-secrets.sh"
echo "  ./scripts/03-deploy.sh"
echo "  ./scripts/04-verify.sh"
echo ""