import os
import time

from ahserver.serverenv import ServerEnv
from ahserver.globalEnv import initEnv, password_encode as _password_encode
from appPublic.jsonConfig import getConfig

DBNAME = "pipeline"

# 静态资源缓存版本号：取所有应用级 js/css 与 bricks 主文件的最大 mtime。
# 浏览器对无 Cache-Control 的静态文件走启发式缓存，改了 js 用户仍跑旧代码；
# 这里把 mtime 作为 ?v= 参数注入 header.tmpl，部署后自动失效，无需手工 bump 版本号。
_ASSETS_VER_TTL = 30
_assets_ver_cache = {'ver': None, 'ts': 0.0}


def _asset_ospaths():
    """把 jsfiles()/cssfiles() 的 url 路径映射回磁盘路径（含 bricks 主文件）。"""
    g = ServerEnv()
    config = getConfig()
    roots = []
    for item in (config.website.paths or []):
        roots.append(item[0] if isinstance(item, (list, tuple)) else item)

    urls = ['/bricks/bricks.js', '/bricks/css/bricks.css']
    for name in ('jsfiles', 'cssfiles'):
        f = g.get(name)
        if not callable(f):
            continue
        try:
            urls += list(f() or [])
        except Exception:
            pass

    for u in urls:
        for root in roots:
            fp = root + u
            if os.path.isfile(fp):
                yield fp
                break


def assets_ver():
    """静态资源版本号（字符串），30 秒内复用缓存结果。"""
    now = time.time()
    if _assets_ver_cache['ver'] and now - _assets_ver_cache['ts'] < _ASSETS_VER_TTL:
        return _assets_ver_cache['ver']
    mx = 0
    try:
        for fp in _asset_ospaths():
            try:
                m = os.path.getmtime(fp)
            except OSError:
                continue
            if m > mx:
                mx = m
    except Exception:
        mx = 0
    ver = str(int(mx)) if mx else str(int(now))
    _assets_ver_cache['ver'] = ver
    _assets_ver_cache['ts'] = now
    return ver


def password_encode(s):
    """Wrapper to handle None input during login form load."""
    if s is None:
        return ''
    return _password_encode(s)


def get_module_dbname(mname):
    return 'pipeline'


def set_globalvariable():
    initEnv()
    g = ServerEnv()
    g.get_module_dbname = get_module_dbname
    g.password_encode = password_encode
    g.assets_ver = assets_ver