"""sap-cli 应用入口：解析参数、初始化连接、路由命令。"""
from __future__ import annotations

import io
import logging
import os
import sys

import requests

from sapcli.config import load_config
from sapcli.client import ADTClient
from sapcli.commands import (
    cmd_create,
    cmd_delete,
    cmd_unlock,
    cmd_download,
    cmd_info,
    cmd_init,
    cmd_refresh,
    cmd_sync,
    cmd_sync_all,
    cmd_config,
    cmd_list,
    cmd_whereused,
    cmd_search,
    cmd_transport,
    cmd_check,
    cmd_format,
    cmd_diff,
    cmd_package,
    cmd_cds,
    cmd_analyze,
    cmd_scaffold,
    cmd_show_table,
    cmd_read_table,
    cmd_run_program,
    cmd_activate,
    cmd_upload,
    cmd_syntax_check,
    cmd_unit_test,
    cmd_history,
    cmd_clone,
    cmd_enhancement,
)
from sapcli.auth import cmd_auth_login, cmd_auth_logout, cmd_auth_status
from sapcli.exceptions import SapCliError, ConfigError
from sapcli.cli.parser import build_parser


def _setup_encoding() -> None:
    """确保 stdout/stderr 使用 UTF-8 编码。"""
    if hasattr(sys.stdout, "buffer"):
        sys.stdout = io.TextIOWrapper(sys.stdout.buffer, encoding="utf-8", errors="replace")
    if hasattr(sys.stderr, "buffer"):
        sys.stderr = io.TextIOWrapper(sys.stderr.buffer, encoding="utf-8", errors="replace")


def _setup_logging() -> None:
    """配置日志（写入文件，不影响 stdout）。"""
    log_dir = os.path.join(os.path.dirname(os.path.abspath(__file__)), "..", "..", "log")
    os.makedirs(log_dir, exist_ok=True)
    log_file = os.path.join(log_dir, "adt_tools.log")
    logging.basicConfig(
        level=logging.DEBUG,
        format="%(asctime)s | %(levelname)-7s | %(message)s",
        handlers=[
            logging.FileHandler(log_file, encoding="utf-8", mode="a"),
        ],
    )


def _suppress_ssl_warnings() -> None:
    """禁用 urllib3 的 InsecureRequestWarning。"""
    requests.packages.urllib3.disable_warnings(
        requests.packages.urllib3.exceptions.InsecureRequestWarning
    )


def main() -> None:
    """sap-cli 主入口。"""
    _setup_encoding()
    _setup_logging()
    _suppress_ssl_warnings()

    parser = build_parser()
    args = parser.parse_args()

    if not args.command:
        parser.print_help()
        sys.exit(1)

    # config 命令不需要 SAP 连接
    if args.command == "config":
        cmd_config(args)
        return

    # auth 不需要 SAP 连接
    if args.command == "auth":
        auth_action = getattr(args, "auth_action", None)
        if auth_action == "login":
            cmd_auth_login(args)
        elif auth_action == "logout":
            cmd_auth_logout(args)
        else:
            cmd_auth_status(args)
        return

    # clone 自行按 --from/--to profile 构建源/目标连接，跳过默认登录
    if args.command == "clone":
        try:
            cmd_clone(args, None)
        except SapCliError as e:
            print(f"\n  ✗ {e}")
            sys.exit(1)
        return

    # 加载配置
    try:
        sap_cfg, loaded_from = load_config(args.config, profile=getattr(args, "profile", None))
        if loaded_from:
            logging.getLogger("sapcli").info("Config loaded from: %s", loaded_from)
    except ConfigError as e:
        print(f"  ✗ {e}")
        print(f"     请创建配置文件 (config.ini) 或设置环境变量:")
        print(f"       SAP_HOST, SAP_CLIENT, SAP_USER, SAP_PASSWORD")
        sys.exit(1)

    # 建立 SAP 连接
    verify_ssl = getattr(args, "verify_ssl", False)
    client = ADTClient(sap_cfg.host, sap_cfg.client, sap_cfg.user, sap_cfg.password, verify_ssl=verify_ssl)

    print("\n  → 正在登录...")
    client.login()
    print("  ✓ 登录成功\n")

    # 命令路由表
    command_map = {
        "download": cmd_download,
        "sync": cmd_sync_all if getattr(args, "all", False) else cmd_sync,
        "info": cmd_info,
        "delete": cmd_delete,
        "unlock": cmd_unlock,
        "create": cmd_create,
        "init": cmd_init,
        "refresh": cmd_refresh,
        "list": cmd_list,
        "whereused": cmd_whereused,
        "search": cmd_search,
        "transport": cmd_transport,
        "check": cmd_check,
        "format": cmd_format,
        "activate": cmd_activate,
        "upload": cmd_upload,
        "syntax-check": cmd_syntax_check,
        "diff": cmd_diff,
        "package": cmd_package,
        "cds": cmd_cds,
        "analyze": cmd_analyze,
        "scaffold": cmd_scaffold,
        "show-table": cmd_show_table,
        "read-table": cmd_read_table,
        "run-program": cmd_run_program,
        "unit-test": cmd_unit_test,
        "history": cmd_history,
        "enhancement": cmd_enhancement,
    }

    # 批量 sync 参数校验
    if args.command == "sync" and getattr(args, "all", False):
        if args.name and args.type:
            print("  ✗ --all 模式下不需要 --name 和 --type 参数")
            sys.exit(1)
    elif args.command == "sync" and not getattr(args, "all", False):
        if not args.name or not args.type:
            print("  ✗ 单对象模式需要 --name 和 --type 参数")
            sys.exit(1)

    # 执行命令
    handler = command_map.get(args.command)
    if handler is None:
        print(f"  ✗ 未知命令: {args.command}")
        sys.exit(1)

    try:
        handler(args, client)
    except SapCliError as e:
        print(f"\n  ✗ {e}")
        sys.exit(1)