#!/usr/bin/env python3
"""sap-cli 安装与配置脚本。

用法：
    python setup.py install     # 安装 sap-cli 及依赖
    python setup.py config      # 交互式配置 SAP 连接
    python setup.py verify      # 验证安装和连接
    python setup.py all         # 一键完成：安装 + 配置 + 验证
"""
from __future__ import annotations

import os
import sys
import subprocess
from pathlib import Path

# ── 路径常量 ──────────────────────────────────────────────
SKILL_DIR = Path(__file__).resolve().parent.parent
ASSETS_DIR = SKILL_DIR / "assets"
CONFIG_EXAMPLE = ASSETS_DIR / "config.ini.example"
CONFIG_FILE = ASSETS_DIR / "config.ini"


def _run(cmd: list[str], **kw) -> int:
    """运行命令并实时输出。"""
    print(f"  $ {' '.join(cmd)}")
    return subprocess.call(cmd, **kw)


def _pip_available() -> bool:
    try:
        subprocess.run([sys.executable, "-m", "pip", "--version"],
                       capture_output=True, check=True)
        return True
    except Exception:
        return False


# ── 安装 ─────────────────────────────────────────────────
def do_install():
    """安装 sap-cli 及其依赖。"""
    print("\n📦 安装 sap-cli ...")

    # 1. 检查 Python 版本
    py_ver = sys.version_info
    if py_ver < (3, 10):
        print(f"  ❌ Python 3.10+ required, got {py_ver.major}.{py_ver.minor}")
        sys.exit(1)
    print(f"  ✅ Python {py_ver.major}.{py_ver.minor}.{py_ver.micro}")

    # 2. 安装依赖
    if _pip_available():
        print("\n  Installing dependencies ...")
        ret = _run([sys.executable, "-m", "pip", "install", "requests>=2.28.0"])
        if ret != 0:
            print("  ⚠️  pip install failed, trying manual install ...")
    else:
        print("  ⚠️  pip not available, skipping dependency install.")
        print("  请手动安装: pip install requests")

    # 3. 验证 sapcli 包可导入
    print("\n  Verifying sapcli package ...")
    ret = _run([sys.executable, "-c", "from sapcli import __version__; print(f'  ✅ sap-cli v{__version__}')"],
               cwd=str(ASSETS_DIR))
    if ret != 0:
        print("  ❌ sapcli package import failed.")
        sys.exit(1)

    # 4. 验证 CLI 入口
    ret = _run([sys.executable, "main.py", "--help"], cwd=str(ASSETS_DIR))
    if ret != 0:
        print("  ❌ CLI entry point failed.")
        sys.exit(1)

    print("\n  ✅ sap-cli 安装成功！")
    print(f"  安装位置: {ASSETS_DIR}")
    print(f"  运行方式: cd {ASSETS_DIR} && python main.py <command>")


# ── 配置 ─────────────────────────────────────────────────
def do_config():
    """交互式配置 SAP 连接。"""
    print("\n⚙️  配置 SAP 连接 ...")

    if CONFIG_FILE.exists():
        print(f"  配置文件已存在: {CONFIG_FILE}")
        answer = input("  是否覆盖？(y/N): ").strip().lower()
        if answer != "y":
            print("  保留现有配置。")
            return

    # 从模板创建
    if CONFIG_EXAMPLE.exists():
        import shutil
        shutil.copy2(CONFIG_EXAMPLE, CONFIG_FILE)
        print(f"  ✅ 已从模板创建: {CONFIG_FILE}")
    else:
        # 手动创建
        CONFIG_FILE.write_text(
            "[SAP]\nhost = \nclient = \nuser = \npassword = \n",
            encoding="utf-8",
        )
        print(f"  ✅ 已创建空白配置: {CONFIG_FILE}")

    # 交互式填写
    print("\n  请输入 SAP 连接信息（留空跳过）：")
    host = input("  SAP 服务器地址 (如 http://sap.example.com:8000): ").strip()
    client = input("  SAP Client (如 100): ").strip()
    user = input("  用户名: ").strip()
    password = input("  密码: ").strip()

    if host or client or user or password:
        # 简单替换
        content = CONFIG_FILE.read_text(encoding="utf-8")
        if host:
            content = _replace_config_value(content, "host", host)
        if client:
            content = _replace_config_value(content, "client", client)
        if user:
            content = _replace_config_value(content, "user", user)
        if password:
            content = _replace_config_value(content, "password", password)
        CONFIG_FILE.write_text(content, encoding="utf-8")
        print("  ✅ 配置已更新。")
    else:
        print("  ⚠️  未填写任何信息，请手动编辑: " + str(CONFIG_FILE))

    print("\n  💡 也可以通过环境变量配置（优先级更高）：")
    print("     SAP_HOST / SAP_CLIENT / SAP_USER / SAP_PASSWORD")


def _replace_config_value(content: str, key: str, value: str) -> str:
    """替换 config.ini 中的值。"""
    import re
    pattern = rf"^({key}\s*=\s*).*?$"
    return re.sub(pattern, rf"\g<1>{value}", content, flags=re.MULTILINE)


# ── 验证 ─────────────────────────────────────────────────
def do_verify():
    """验证安装和连接。"""
    print("\n🔍 验证安装 ...")

    # 1. 包导入
    ret = _run([sys.executable, "-c", "from sapcli import __version__; print('  ✅ 包导入正常')"],
               cwd=str(ASSETS_DIR))
    if ret != 0:
        print("  ❌ 包导入失败")
        return False

    # 2. CLI 帮助
    ret = _run([sys.executable, "main.py", "--help"], cwd=str(ASSETS_DIR))
    if ret != 0:
        print("  ❌ CLI 入口失败")
        return False

    # 3. 配置文件
    if CONFIG_FILE.exists():
        print(f"  ✅ 配置文件: {CONFIG_FILE}")
    else:
        print(f"  ⚠️  未找到配置文件，请运行: python setup.py config")
        return False

    # 4. SAP 连接测试
    print("\n  测试 SAP 连接 ...")
    ret = _run([sys.executable, "main.py", "config", "show"], cwd=str(ASSETS_DIR))
    if ret == 0:
        print("  ✅ SAP 连接正常！")
        return True
    else:
        print("  ⚠️  连接测试失败，请检查配置。")
        return False


# ── 一键全部 ─────────────────────────────────────────────
def do_all():
    """安装 + 配置 + 验证。"""
    do_install()
    do_config()
    do_verify()
    print("\n" + "=" * 50)
    print("  🎉 sap-cli 已就绪！")
    print("  使用示例:")
    print(f"    cd {ASSETS_DIR}")
    print("    python main.py info --name ZMY_CLASS --type class")
    print("=" * 50)


# ── 入口 ─────────────────────────────────────────────────
def main():
    commands = {
        "install": do_install,
        "config": do_config,
        "verify": do_verify,
        "all": do_all,
    }

    if len(sys.argv) < 2 or sys.argv[1] not in commands:
        print("Usage: python setup.py <install|config|verify|all>")
        print()
        print("Commands:")
        print("  install  - Install sap-cli and dependencies")
        print("  config   - Configure SAP connection (interactive)")
        print("  verify   - Verify installation and connection")
        print("  all      - Install + config + verify (recommended)")
        sys.exit(1)

    commands[sys.argv[1]]()


if __name__ == "__main__":
    main()