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

BASE_URL="https://code.aiserverai.online/v1"
NODE_MIRROR="https://npmmirror.com/mirrors/node"
NPM_MIRROR="https://registry.npmmirror.com"
SUPPORT_EMAIL="alexisty233@gmail.com"
INSTALL_ROOT="$HOME/.local"
BIN_DIR="$INSTALL_ROOT/bin"
LIB_DIR="$INSTALL_ROOT/lib"
CODEX_HOME_DIR="$HOME/.codex"
TMP_DIR="$(mktemp -d)"

cleanup() {
  rm -rf "$TMP_DIR"
}
trap cleanup EXIT

fail() {
  trap - ERR
  if command -v zenity >/dev/null 2>&1 && [ -n "${DISPLAY:-}" ]; then
    zenity --error --title="Codex 安装失败" --text="$1\n\n请附完整失败截图联系管理员：$SUPPORT_EMAIL\n我们会在 72 小时内更新脚本，请更新后重试。" >/dev/null 2>&1 || true
  fi
  printf '安装失败：%s\n请附完整失败截图联系管理员：%s\n我们会在 72 小时内更新脚本，请更新后重试。\n' "$1" "$SUPPORT_EMAIL" >&2
  exit 1
}

handle_error() {
  local status="$?"
  local line="$1"
  fail "安装步骤执行失败（第 $line 行，退出码 $status）"
}

trap 'handle_error "$LINENO"' ERR

download_text() {
  if command -v curl >/dev/null 2>&1; then
    curl -fsSL --retry 3 "$1"
  elif command -v wget >/dev/null 2>&1; then
    wget -q -t 3 -O - "$1"
  else
    fail "系统缺少 curl 或 wget，请先安装其中一个下载工具"
  fi
}

download_file() {
  if command -v curl >/dev/null 2>&1; then
    curl -fsSL --retry 3 -o "$2" "$1"
  elif command -v wget >/dev/null 2>&1; then
    wget -q -t 3 -O "$2" "$1"
  else
    fail "系统缺少 curl 或 wget，请先安装其中一个下载工具"
  fi
}

ensure_node() {
  if command -v node >/dev/null 2>&1 && command -v npm >/dev/null 2>&1; then
    NODE_MAJOR="$(node -p 'process.versions.node.split(".")[0]' 2>/dev/null || printf '0')"
    if [ "$NODE_MAJOR" -ge 20 ]; then
      return
    fi
  fi

  printf '正在安装 Node.js LTS…\n'
  if ! NODE_INDEX="$(download_text "$NODE_MIRROR/index.tab")"; then
    NODE_INDEX="$(download_text "https://nodejs.org/dist/index.tab")"
  fi
  NODE_VERSION="$(printf '%s\n' "$NODE_INDEX" | awk 'NR > 1 && $10 != "-" { print $1; exit }')"
  [ -n "$NODE_VERSION" ] || fail "无法获取 Node.js LTS 版本"

  case "$(uname -m)" in
    aarch64|arm64) NODE_ARCH="arm64" ;;
    x86_64|amd64) NODE_ARCH="x64" ;;
    *) fail "暂不支持此 Linux 架构：$(uname -m)" ;;
  esac

  ARCHIVE="$TMP_DIR/node.tar.gz"
  ARCHIVE_NAME="node-$NODE_VERSION-linux-$NODE_ARCH.tar.gz"
  if ! download_file "$NODE_MIRROR/$NODE_VERSION/$ARCHIVE_NAME" "$ARCHIVE"; then
    download_file "https://nodejs.org/dist/$NODE_VERSION/$ARCHIVE_NAME" "$ARCHIVE"
  fi
  if ! CHECKSUMS="$(download_text "$NODE_MIRROR/$NODE_VERSION/SHASUMS256.txt")"; then
    CHECKSUMS="$(download_text "https://nodejs.org/dist/$NODE_VERSION/SHASUMS256.txt")"
  fi
  EXPECTED_HASH="$(printf '%s\n' "$CHECKSUMS" | awk -v file="$ARCHIVE_NAME" '$2 == file { print $1; exit }')"
  ACTUAL_HASH="$(sha256sum "$ARCHIVE" | awk '{ print $1 }')"
  [ -n "$EXPECTED_HASH" ] && [ "$EXPECTED_HASH" = "$ACTUAL_HASH" ] || fail "Node.js 安装包校验失败"
  tar -xzf "$ARCHIVE" -C "$TMP_DIR"
  EXTRACTED="$TMP_DIR/node-$NODE_VERSION-linux-$NODE_ARCH"
  NODE_HOME="$LIB_DIR/node-$NODE_VERSION-linux-$NODE_ARCH"
  mkdir -p "$LIB_DIR" "$BIN_DIR"
  if [ ! -d "$NODE_HOME" ]; then
    mv "$EXTRACTED" "$NODE_HOME"
  fi
  ln -sf "$NODE_HOME/bin/node" "$BIN_DIR/node"
  ln -sf "$NODE_HOME/bin/npm" "$BIN_DIR/npm"
  ln -sf "$NODE_HOME/bin/npx" "$BIN_DIR/npx"
  export PATH="$BIN_DIR:$PATH"
}

persist_path() {
  PROFILE_FILE="$HOME/.profile"
  PATH_LINE='export PATH="$HOME/.local/bin:$PATH"'
  touch "$PROFILE_FILE"
  if ! grep -Fq "$PATH_LINE" "$PROFILE_FILE"; then
    printf '\n%s\n' "$PATH_LINE" >> "$PROFILE_FILE"
  fi
  export PATH="$BIN_DIR:$PATH"
}

prompt_key() {
  if command -v zenity >/dev/null 2>&1 && [ -n "${DISPLAY:-}" ]; then
    zenity --password --title="Codex 一键配置" --text="请输入你的 Sub2API Key"
    return
  fi
  printf '请输入你的 Sub2API Key：' >&2
  read -r -s API_KEY_INPUT
  printf '\n' >&2
  printf '%s' "$API_KEY_INPUT"
}

write_config() {
  mkdir -p "$CODEX_HOME_DIR"
  chmod 700 "$CODEX_HOME_DIR"
  STAMP="$(date +%Y%m%d-%H%M%S)"
  MAIN_CONFIG="$CODEX_HOME_DIR/config.toml"

  [ ! -f "$MAIN_CONFIG" ] || cp "$MAIN_CONFIG" "$MAIN_CONFIG.backup-$STAMP"

  PRESERVED_CONFIG="$TMP_DIR/config.preserved.toml"
  if [ -f "$MAIN_CONFIG" ]; then
    awk '
      BEGIN { in_table = 0 }
      /^\[/ {
        in_table = 1
        skip_provider = ($0 ~ /^\[model_providers\.aiserver(\.|\])/)
      }
      skip_provider { next }
      !in_table && /^[[:space:]]*(profile|model|model_provider|model_reasoning_effort)[[:space:]]*=/ { next }
      { print }
    ' "$MAIN_CONFIG" > "$PRESERVED_CONFIG"
  else
    : > "$PRESERVED_CONFIG"
  fi

  MAIN_TMP="$TMP_DIR/config.toml"
  {
    cat <<'CONFIG'
model = "gpt-5.6-sol"
model_provider = "aiserver"
model_reasoning_effort = "medium"
CONFIG
    cat "$PRESERVED_CONFIG"
    cat <<'CONFIG'

[model_providers.aiserver]
name = "AIServer"
base_url = "https://code.aiserverai.online/v1"
wire_api = "responses"
requires_openai_auth = true
CONFIG
  } > "$MAIN_TMP"
  mv "$MAIN_TMP" "$MAIN_CONFIG"
  chmod 600 "$MAIN_CONFIG"
}

printf '正在准备 Codex…\n'
ensure_node
persist_path
mkdir -p "$INSTALL_ROOT/cache/npm"
CODEX_BIN="$BIN_DIR/codex"
if ! npm install -g --prefix "$INSTALL_ROOT" --cache="$INSTALL_ROOT/cache/npm" --registry="$NPM_MIRROR" --include=optional --no-audit --no-fund @openai/codex@latest || ! "$CODEX_BIN" --version >/dev/null 2>&1; then
  printf '中国 npm 镜像安装不完整，正在使用官方源修复…\n'
  npm install -g --force --prefix "$INSTALL_ROOT" --cache="$INSTALL_ROOT/cache/npm" --registry="https://registry.npmjs.org" --include=optional --no-audit --no-fund @openai/codex@latest
fi
"$CODEX_BIN" --version || fail "Codex CLI 或当前系统对应的原生组件安装未完成"

API_KEY="$(prompt_key)"
[ -n "$API_KEY" ] || fail "API Key 不能为空"
curl -fsS --retry 2 -o /dev/null -H "Authorization: Bearer $API_KEY" "$BASE_URL/models" || fail "API Key 或网络验证失败"
write_config
printf '%s' "$API_KEY" | "$CODEX_BIN" login --with-api-key >/dev/null
unset API_KEY

if command -v zenity >/dev/null 2>&1 && [ -n "${DISPLAY:-}" ]; then
  zenity --info --title="配置完成" --text="Codex 已安装并完成 AIServer 配置。\n打开新的终端，进入项目目录运行 codex。" >/dev/null 2>&1 || true
fi
printf '配置完成。打开新的终端并运行 codex。\n'