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

# ─────────────────────────────────────────────
#  CTMS 一键安装脚本
#  复用 scripts/common.sh 的共享库（颜色、UI、compose、依赖、.env）。
# ─────────────────────────────────────────────

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
# shellcheck source=scripts/common.sh
source "$SCRIPT_DIR/common.sh"

TARGET_ENV=""
BASE_URL=""
ASSUME_YES=0
SKIP_BUILD=0
SKIP_MIGRATE=0
VERBOSE=0
ROOT_DIR="$CTMS_ROOT_DIR"
ENV_FILE="$CTMS_ENV_FILE"

# ── Banner ───────────────────────────────────
_banner() {
  local b="${CC_PRIMARY}${C_BOLD}"   # 边框主色
  local a="${CC_INFO}"               # 字形填充色
  local r="${C_RESET}"
  printf '\n'
  printf '%s╔══════════════════════════════════════════════╗%s\n' "$b" "$r"
  printf '%s║%s  ██████╗████████╗███╗   ███╗███████╗       %s║%s\n' "$b" "$a" "${CC_PRIMARY}" "$r"
  printf '%s║%s ██╔════╝╚══██╔══╝████╗ ████║██╔════╝       %s║%s\n' "$b" "$a" "${CC_PRIMARY}" "$r"
  printf '%s║%s ██║        ██║   ██╔████╔██║███████╗       %s║%s\n' "$b" "$a" "${CC_PRIMARY}" "$r"
  printf '%s║%s ██║        ██║   ██║╚██╔╝██║╚════██║       %s║%s\n' "$b" "$a" "${CC_PRIMARY}" "$r"
  printf '%s║%s ╚██████╗   ██║   ██║ ╚═╝ ██║███████║       %s║%s\n' "$b" "$a" "${CC_PRIMARY}" "$r"
  printf '%s║%s  ╚═════╝   ╚═╝   ╚═╝     ╚═╝╚══════╝       %s║%s\n' "$b" "$a" "${CC_PRIMARY}" "$r"
  printf '%s║%s       临床试验管理系统 · 安装部署程序       %s║%s\n' "$b" "${CC_MUTED}" "${CC_PRIMARY}" "$r"
  printf '%s╚══════════════════════════════════════════════╝%s\n' "$b" "$r"
  printf '\n'
}

# ── 简短别名（统一走 common 的 ctms_*） ────────
log()  { ctms_info "$@"; }
ok()   { ctms_ok "$@"; }
warn() { ctms_warn "$@"; }
fail() { ctms_fail "$@"; }
step() { ctms_step "$@"; }

# 当前环境的 compose 调用
compose_cmd() {
  ctms_compose "$TARGET_ENV" "$@"
}

# ── 帮助 ─────────────────────────────────────
usage() {
  cat <<EOF
${C_BOLD}用法:${C_RESET}
  bash scripts/install.sh ${C_CYAN}<环境>${C_RESET} [选项]

${C_BOLD}环境:${C_RESET}
  ${C_CYAN}dev${C_RESET}       本地开发环境（使用默认密钥，不生成 RSA 密钥对）
            前端通过 Vite dev server 热加载，入口仍为 http://127.0.0.1:8888
  ${C_CYAN}main${C_RESET}      内网测试 / 预发布环境
  ${C_CYAN}release${C_RESET}   生产环境（强制 HTTPS，自动生成密钥对）

${C_BOLD}选项:${C_RESET}
  ${C_WHITE}--base-url <url>${C_RESET}   健康检查使用的访问地址
                     dev/main 默认 http://127.0.0.1:8888
                     release 必须通过此参数或交互输入提供
  ${C_WHITE}--yes${C_RESET}              跳过所有交互确认，适合 CI/CD 自动化执行
  ${C_WHITE}--skip-build${C_RESET}       跳过镜像构建，仍会启动容器（docker compose up -d）
  ${C_WHITE}--skip-migrate${C_RESET}     跳过数据库迁移（alembic upgrade head）
  ${C_WHITE}--verbose${C_RESET}          展开所有命令的实时输出（默认折叠为 spinner）
  ${C_WHITE}-h, --help${C_RESET}         显示此帮助信息

${C_BOLD}示例:${C_RESET}
  bash scripts/install.sh dev
  bash scripts/install.sh main --base-url http://127.0.0.1:8888
  bash scripts/install.sh release --base-url https://ctms.example.com --yes
EOF
}

# ── 参数解析 ─────────────────────────────────
parse_args() {
  if [[ $# -eq 0 ]]; then
    usage
    exit 1
  fi

  TARGET_ENV="$1"
  shift

  case "$TARGET_ENV" in
    dev|main|release) ;;
    -h|--help) usage; exit 0 ;;
    *)
      usage
      fail "未知环境 \"$TARGET_ENV\"，有效值为 dev、main 或 release"
      ;;
  esac

  while [[ $# -gt 0 ]]; do
    case "$1" in
      --base-url)
        [[ $# -ge 2 ]] || fail "--base-url 需要提供一个 URL 参数"
        BASE_URL="$2"
        shift 2
        ;;
      --yes)          ASSUME_YES=1; shift ;;
      --skip-build)   SKIP_BUILD=1;  shift ;;
      --skip-migrate) SKIP_MIGRATE=1; shift ;;
      --verbose)      VERBOSE=1; shift ;;
      -h|--help)      usage; exit 0 ;;
      *)
        usage
        fail "未知参数: $1"
        ;;
    esac
  done
}

# ── 依赖检查 ─────────────────────────────────
check_dependencies() {
  step "检查系统依赖"
  ctms_require_dependencies "$TARGET_ENV"
  ok "系统依赖检查通过"
}

# ── 环境参数计算 ──────────────────────────────
compose_project_name() { ctms_project_name "$TARGET_ENV"; }
app_env()              { ctms_app_env "$TARGET_ENV"; }
key_id()               { ctms_key_id "$TARGET_ENV"; }
default_base_url()     { ctms_default_base_url "$TARGET_ENV"; }

# ── .env 读写（复用 common） ──────────────────
read_env_value() { ctms_read_env_value "$@"; }

resolve_effective_config() {
  local desired_project_name="$1"
  local desired_runtime_env="$2"
  local desired_login_key_id="$3"

  EFFECTIVE_PROJECT_NAME="$desired_project_name"
  EFFECTIVE_RUNTIME_ENV="$desired_runtime_env"
  EFFECTIVE_LOGIN_KEY_ID="$desired_login_key_id"

  [[ -f "$ENV_FILE" ]] || return 0

  local env_project_name env_runtime_env env_login_key_id
  env_project_name="$(read_env_value COMPOSE_PROJECT_NAME || true)"
  env_runtime_env="$(read_env_value ENV || true)"
  env_login_key_id="$(read_env_value LOGIN_RSA_KEY_ID || true)"

  # 身份类“冲突”才致命（防止覆盖后孤立原环境的容器）；“缺失”留给 prepare_env_file 补全。
  if [[ -n "$env_project_name" && "$env_project_name" != "$desired_project_name" ]]; then
    fail ".env 的 COMPOSE_PROJECT_NAME=$env_project_name 与目标环境 $TARGET_ENV 期望值 $desired_project_name 不一致；如需切换环境请先卸载旧环境或手动清理 .env"
  fi
  if [[ -n "$env_runtime_env" && "$env_runtime_env" != "$desired_runtime_env" ]]; then
    fail ".env 的 ENV=$env_runtime_env 与目标环境 $TARGET_ENV 期望值 $desired_runtime_env 不一致；如需切换环境请先卸载旧环境或手动清理 .env"
  fi

  # 仅采用 .env 中实际存在的值，缺失项保留目标默认（由 prepare_env_file 写回）。
  [[ -n "$env_project_name" ]] && EFFECTIVE_PROJECT_NAME="$env_project_name"
  [[ -n "$env_runtime_env" ]] && EFFECTIVE_RUNTIME_ENV="$env_runtime_env"
  [[ -n "$env_login_key_id" ]] && EFFECTIVE_LOGIN_KEY_ID="$env_login_key_id"
}

# 生成单行转义 PEM：行间用 \n 连接，末尾不追加多余 \n
generate_escaped_private_key() {
  openssl genpkey -algorithm RSA -pkeyopt rsa_keygen_bits:2048 2>/dev/null \
    | awk 'NR > 1 { printf "\\n" } { printf "%s", $0 }'
}

generate_jwt_secret() {
  openssl rand -hex 32
}

# ── 地址解析 ─────────────────────────────────
resolve_base_url() {
  [[ -z "$BASE_URL" ]] && BASE_URL="$(default_base_url)"

  if [[ "$TARGET_ENV" == "release" && -z "$BASE_URL" && "$ASSUME_YES" -eq 0 ]]; then
    printf '  %s▸%s 请输入 release 健康检查域名（例如 https://ctms.example.com）: ' \
      "${C_YELLOW}${C_BOLD}" "${C_RESET}"
    read -r BASE_URL || true
  fi

  [[ -n "$BASE_URL" ]] || fail "release 环境必须通过 --base-url 或交互输入提供 HTTPS 地址"

  if [[ "$TARGET_ENV" == "release" && "$BASE_URL" != https://* ]]; then
    fail "release 环境的访问地址必须使用 HTTPS"
  fi
}

# ── 安装确认 ─────────────────────────────────
confirm_install() {
  local project_name="$1"
  local runtime_env="$2"
  step "确认安装参数"

  local env_status build_status migrate_status pg_status
  env_status="$([[ -f "$ENV_FILE" ]] && printf '已存在' || printf '新建')"
  build_status="$([[ "$SKIP_BUILD"   -eq 1 ]] && printf '跳过' || printf '执行')"
  migrate_status="$([[ "$SKIP_MIGRATE" -eq 1 ]] && printf '跳过' || printf '执行')"
  pg_status="$([[ -d "$ROOT_DIR/pg_data" ]] && printf '已存在' || printf '新建')"

  local w=66
  local row
  row() {
    local label="$1" value="$2" vcolor="${3:-$CC_TEXT}"
    local padded
    padded="$(ctms_pad_right "$label" 14)"
    ctms_box_line "${CC_PRIMARY}${C_BOLD}" "$w" \
      "${padded}${value}" \
      "${CC_MUTED}${padded}${C_RESET}${vcolor}${value}${C_RESET}"
  }

  printf '\n'
  ctms_box_top "${CC_PRIMARY}${C_BOLD}" "安装参数预览" "$w"
  row "目标环境"     "$TARGET_ENV"   "${CC_INFO}${C_BOLD}"
  row "运行模式"     "$runtime_env"
  row "Compose 项目" "$project_name"
  row "健康检查地址" "$BASE_URL"     "${CC_INFO}"
  row ".env 文件"    "$env_status"
  row "pg_data 目录" "$pg_status"
  row "镜像构建"     "$build_status"
  row "数据库迁移"   "$migrate_status"
  ctms_box_bottom "${CC_PRIMARY}${C_BOLD}" "$w"

  if [[ "$ASSUME_YES" -eq 1 ]]; then
    log "已启用 --yes，跳过确认"
    return
  fi

  printf '\n  %s%s%s 确认以上参数并继续安装？输入 %syes%s 继续: ' \
    "${CC_WARN}${C_BOLD}" "$ICON_PROMPT" "${C_RESET}" "${C_BOLD}" "${C_RESET}"
  local answer
  read -r answer || answer=""
  [[ "$answer" == "yes" ]] || fail "用户取消安装"
}

# ── .env 准备 ─────────────────────────────────
sync_frontend_build_env() {
  local runtime_env="$1"
  local allow_insecure_dev_login="false"
  [[ "$runtime_env" == "development" ]] && allow_insecure_dev_login="true"

  ctms_upsert_env_value VITE_RUNTIME_ENV "$runtime_env"
  ctms_upsert_env_value VITE_ALLOW_INSECURE_DEV_LOGIN "$allow_insecure_dev_login"
  ok "前端构建环境变量已同步"
}

prepare_env_file() {
  step "准备环境配置文件"
  local project_name="$1" runtime_env="$2" login_key_id="$3"
  local jwt_secret="" rsa_private_key=""

  # 首次安装：无 .env，写全量。
  if [[ ! -f "$ENV_FILE" ]]; then
    if [[ "$TARGET_ENV" == "dev" ]]; then
      jwt_secret="dev-secret"
      rsa_private_key=""
    else
      jwt_secret="$(generate_jwt_secret)"
      ok "已生成新的 JWT_SECRET_KEY"
      log "正在生成 RSA 2048 密钥对，请稍候…"
      rsa_private_key="$(generate_escaped_private_key)"
      ok "已生成新的 LOGIN_RSA_PRIVATE_KEY"
    fi
    ctms_write_env_file "$project_name" "$runtime_env" "$login_key_id" "$jwt_secret" "$rsa_private_key"
    ok ".env 写入完成"
    return
  fi

  # 已有 .env：逐项探测，缺则补全，已有值一律不动（身份类冲突已在 resolve_effective_config 拦截）。
  local repaired=0

  # 身份类：缺失补目标值
  if ! ctms_env_has_key COMPOSE_PROJECT_NAME; then
    ctms_upsert_env_value COMPOSE_PROJECT_NAME "$project_name"; repaired=1
    warn ".env 缺少 COMPOSE_PROJECT_NAME，已补为 $project_name"
  fi
  if ! ctms_env_has_key ENV; then
    ctms_upsert_env_value ENV "$runtime_env"; repaired=1
    warn ".env 缺少 ENV，已补为 $runtime_env"
  fi
  if ! ctms_env_has_key LOGIN_RSA_KEY_ID; then
    ctms_upsert_env_value LOGIN_RSA_KEY_ID "$login_key_id"; repaired=1
    warn ".env 缺少 LOGIN_RSA_KEY_ID，已补为 $login_key_id"
  fi

  # JWT 密钥：缺失或空才补（保留已有值，避免使现有会话失效）
  if [[ -z "$(read_env_value JWT_SECRET_KEY || true)" ]]; then
    if [[ "$TARGET_ENV" == "dev" ]]; then
      jwt_secret="dev-secret"
    else
      jwt_secret="$(generate_jwt_secret)"
    fi
    ctms_upsert_env_value JWT_SECRET_KEY "$jwt_secret"; repaired=1
    warn ".env 缺少 JWT_SECRET_KEY，已补全"
  fi

  # RSA 私钥：非 dev 缺失或空才生成；dev 仅确保键存在（允许空值）
  if [[ -z "$(read_env_value LOGIN_RSA_PRIVATE_KEY || true)" ]]; then
    if [[ "$TARGET_ENV" != "dev" ]]; then
      log "正在生成 RSA 2048 密钥对，请稍候…"
      rsa_private_key="$(generate_escaped_private_key)"
      ctms_upsert_env_value LOGIN_RSA_PRIVATE_KEY "$rsa_private_key"; repaired=1
      warn ".env 缺少 LOGIN_RSA_PRIVATE_KEY，已生成新密钥"
    elif ! ctms_env_has_key LOGIN_RSA_PRIVATE_KEY; then
      ctms_upsert_env_value LOGIN_RSA_PRIVATE_KEY ""; repaired=1
    fi
  fi

  if [[ "$repaired" -eq 1 ]]; then
    ok ".env 已补全缺失项"
  else
    ok "检测到完整 .env，沿用现有配置"
  fi
}

# ── Docker 流程 ───────────────────────────────
run_compose_config() {
  step "校验 Docker Compose 配置"
  ctms_run_quiet "Docker Compose 配置语法校验" -- compose_cmd config
}

run_backend_init() {
  step "初始化数据库与管理员账号"
  ctms_run_quiet "运行 backend-init 容器" -- compose_cmd run --rm backend-init
}

run_build_and_start() {
  if [[ "$SKIP_BUILD" -eq 1 ]]; then
    step "启动服务（跳过镜像构建）"
    if [[ "$TARGET_ENV" == "dev" ]]; then
      ctms_run_quiet "启动开发容器并刷新后端/Nginx/Vite" -- compose_cmd up -d --force-recreate backend nginx frontend-dev
    else
      ctms_run_quiet "启动容器" -- compose_cmd up -d
    fi
  else
    step "构建镜像并启动服务"
    if [[ "$TARGET_ENV" == "dev" ]]; then
      CTMS_LIVE_OUTPUT=1 ctms_run_quiet "构建并刷新开发容器（首次较慢）" -- compose_cmd up -d --build --force-recreate backend nginx frontend-dev
    else
      CTMS_LIVE_OUTPUT=1 ctms_run_quiet "构建镜像并启动容器（首次较慢）" -- compose_cmd up -d --build
    fi
  fi
}

run_migrations() {
  if [[ "$SKIP_MIGRATE" -eq 1 ]]; then
    log "已跳过数据库迁移（--skip-migrate）"
    return
  fi
  step "执行数据库迁移"
  ctms_run_quiet "Alembic upgrade head" -- compose_cmd run --rm backend python -m alembic upgrade head
}

# ── 健康检查 ─────────────────────────────────
check_container_status() {
  step "检查容器运行状态"
  local running
  running="$(compose_cmd ps --services --filter status=running 2>/dev/null || true)"
  local services=(db backend nginx)
  [[ "$TARGET_ENV" != "dev" ]] || services+=(frontend-dev)
  local svc
  for svc in "${services[@]}"; do
    if printf '%s\n' "$running" | grep -qx "$svc"; then
      printf '  %s%s%s %-12s %s运行中%s\n' "${CC_SUCCESS}${C_BOLD}" "$ICON_RUNNING" "${C_RESET}" "$svc" "${CC_SUCCESS}" "${C_RESET}"
    else
      printf '  %s%s%s %-12s %s未运行%s\n' "${CC_DANGER}${C_BOLD}" "$ICON_STOPPED" "${C_RESET}" "$svc" "${CC_DANGER}" "${C_RESET}"
      fail "$svc 容器未正常运行，请执行 'bash scripts/install.sh $TARGET_ENV --skip-build --skip-migrate --verbose' 或对应 compose ps 命令排查"
    fi
  done
}

check_backend_environment() {
  step "校验后端运行时环境变量"
  local expected_env="$1" expected_key_id="$2" expect_rsa="$3"
  local check_code
  check_code=$(cat <<'PY'
import os, sys
from app.core.config import settings
from app.core.login_crypto import _normalize_pem

expected_env    = os.environ["EXPECTED_ENV"]
expected_key_id = os.environ["EXPECTED_KEY_ID"]
expect_rsa      = os.environ["EXPECT_RSA"] == "1"

if settings.ENV != expected_env:
    sys.exit(f"ENV 不匹配: {settings.ENV} != {expected_env}")
if settings.LOGIN_RSA_KEY_ID != expected_key_id:
    sys.exit("LOGIN_RSA_KEY_ID 不匹配")
if expected_env == "production" and settings.JWT_SECRET_KEY == "dev-secret":
    sys.exit("生产环境不允许使用默认 JWT_SECRET_KEY")
if expect_rsa:
    if not settings.LOGIN_RSA_PRIVATE_KEY:
        sys.exit("LOGIN_RSA_PRIVATE_KEY 未配置")
    from cryptography.hazmat.primitives import serialization
    serialization.load_pem_private_key(
        _normalize_pem(settings.LOGIN_RSA_PRIVATE_KEY).encode("utf-8"),
        password=None,
    )
PY
)
  ctms_run_quiet "执行后端配置自检" -- compose_cmd exec -T \
    -e EXPECTED_ENV="$expected_env" \
    -e EXPECTED_KEY_ID="$expected_key_id" \
    -e EXPECT_RSA="$expect_rsa" \
    backend python -c "$check_code"
}

check_http_endpoint() {
  local path="$1"
  local max_attempts="${2:-10}"
  local url="${BASE_URL%/}$path"
  log "探测接口: $url"
  local attempt=1 delay=2 warmup_delay=3
  log "等待服务预热 ${warmup_delay}s …"
  sleep "$warmup_delay"
  while [[ "$attempt" -le "$max_attempts" ]]; do
    if curl -fsS "$url" >/dev/null 2>&1; then
      ok "接口就绪: $path"
      return 0
    fi
    if [[ "$attempt" -lt "$max_attempts" ]]; then
      log "接口尚未就绪，${delay}s 后重试（${attempt}/${max_attempts}）…"
      sleep "$delay"
    fi
    attempt=$(( attempt + 1 ))
  done
  if [[ "$path" == "/api/v1/auth/login-key" ]]; then
    warn "登录公钥接口无响应，请检查 .env 中 LOGIN_RSA_PRIVATE_KEY 是否为完整的单行转义 PEM 文本"
  fi
  fail "接口探测失败: $url"
}

check_dev_nginx_mode() {
  [[ "$TARGET_ENV" == "dev" ]] || return 0

  step "校验开发 Nginx 代理配置"
  if compose_cmd exec -T nginx sh -c 'grep -q "frontend_dev" /etc/nginx/nginx.conf && grep -q "proxy_pass http://frontend_dev" /etc/nginx/nginx.conf' >/dev/null 2>&1; then
    ok "Nginx 已代理到 Vite dev server"
    return
  fi

  fail "当前 Nginx 未加载开发配置，请重试：bash scripts/install.sh dev --skip-migrate --verbose"
}

run_health_checks() {
  local runtime_env="$1" login_key_id="$2"
  local expect_rsa=0
  [[ "$runtime_env" == "production" ]] && expect_rsa=1
  check_container_status
  check_dev_nginx_mode
  check_backend_environment "$runtime_env" "$login_key_id" "$expect_rsa"
  step "探测 HTTP 接口可用性"
  check_http_endpoint "/health"
  check_http_endpoint "/api/v1/auth/login-key"
  if [[ "$TARGET_ENV" == "dev" ]]; then
    check_http_endpoint "/" 60
  fi
  ok "HTTP 接口全部就绪"
}

# ── 完成提示 ─────────────────────────────────
show_success() {
  local w=66
  local pa pe
  pa="$(ctms_pad_right "访问地址" 14)"
  pe="$(ctms_pad_right "环境模式" 14)"
  printf '\n'
  ctms_box_top "${CC_SUCCESS}${C_BOLD}" "$ICON_OK CTMS 安装成功" "$w"
  ctms_box_line "${CC_SUCCESS}${C_BOLD}" "$w" \
    "${pa}${BASE_URL}" \
    "${CC_MUTED}${pa}${C_RESET}${CC_INFO}${BASE_URL}${C_RESET}"
  ctms_box_line "${CC_SUCCESS}${C_BOLD}" "$w" \
    "${pe}${TARGET_ENV}" \
    "${CC_MUTED}${pe}${C_RESET}${CC_TEXT}${TARGET_ENV}${C_RESET}"
  ctms_box_bottom "${CC_SUCCESS}${C_BOLD}" "$w"
  printf '\n'
}

# ── 入口 ─────────────────────────────────────
main() {
  _banner
  parse_args "$@"
  cd "$ROOT_DIR"

  local project_name runtime_env login_key_id
  project_name="$(compose_project_name)"
  runtime_env="$(app_env)"
  login_key_id="$(key_id)"

  resolve_base_url
  resolve_effective_config "$project_name" "$runtime_env" "$login_key_id"
  check_dependencies
  confirm_install "$EFFECTIVE_PROJECT_NAME" "$EFFECTIVE_RUNTIME_ENV"
  prepare_env_file "$project_name" "$runtime_env" "$login_key_id"
  sync_frontend_build_env "$runtime_env"
  # 健康检查地址持久化到 .env（单一事实来源）；独立 upsert，绕开 prepare_env_file 对已存在 .env 的跳过。
  ctms_upsert_env_value CTMS_BASE_URL "$BASE_URL"
  run_compose_config
  run_backend_init
  run_build_and_start
  run_migrations
  resolve_effective_config "$project_name" "$runtime_env" "$login_key_id"
  run_health_checks "$EFFECTIVE_RUNTIME_ENV" "$EFFECTIVE_LOGIN_KEY_ID"
  show_success
}

main "$@"