"""
`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():
    put_buttons(['返回底部'], [lambda: scroll_to('ROOT', Position.BOTTOM)])
    put_markdown('---')

    set_scope('time')
    put_markdown('---')

    async def bg_task():
        count = 5
        while 1:
            with use_scope('time', clear=True):
                put_text('当前时间:', datetime.datetime.now())
            put_text(count)
            count += 1

            await asyncio.sleep(1)

    put_text('\n'.join(str(i) for i in range(5)))

    run_async(bg_task())

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