"""
`pywebio.session.set_env()` demo
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
"""
from pywebio import start_server
from pywebio.input import *
from pywebio.output import *
from pywebio.session import *
import datetime
import asyncio


async def main():
    set_scope('time')
    put_markdown('> 可用于观察 `output_animation` 项的动画效果')
    put_markdown('---')

    async def bg_task():
        while 1:
            with use_scope('time', clear=True):
                put_text('当前时间:', datetime.datetime.now())

            await asyncio.sleep(1)

    run_async(bg_task())

    put_buttons(['输出文本'], [lambda: put_text(datetime.datetime.now())])
    put_markdown('> 可用于观察 `auto_scroll_bottom` 项的自动滚动效果')
    put_markdown('---')
    put_text('Some text.\n' * 10)

    state = {
        'title': 'PyWebIO set_env() Demo',
        'output_animation': True,
        'auto_scroll_bottom': False,
    }
    set_env(**state)

    while 1:
        curr_state_info = ', '.join('%s=%r' % (k, v) for k, v in state.items())
        key = await actions('选择要更改的会话环境设置项', list(state.keys()), help_text='当前状态：' + curr_state_info)
        if key == 'title':
            state['title'] = await input('请输入标题', value=state['title'])
            set_env(title=state['title'])
            toast('已将标题设置为%r' % state['title'])
        elif key in state:
            state[key] = not (state[key])
            set_env(**{key: state[key]})
            toast('已将`%s`设置为%r' % (key, state[key]))


if __name__ == '__main__':
    start_server(main, debug=True, port=8080)