import time
from services.statistics import get_ammeter_left_ele, get_water_left
from services.plot import plot_line


async def render_ammeter_chart():
    times, left_ele, left_free_ele = await get_ammeter_left_ele(limit=24)

    if not times:
        return None

    out = "data/ammeter.png"

    time_range = f'{time.strftime("%Y-%m-%d %H:%M", time.localtime(times[0] / 1000))} ～ {time.strftime("%Y-%m-%d %H:%M", time.localtime(times[-1] / 1000))}'

    plot_line(
        times=[time.strftime("%H:%M", time.localtime(t / 1000)) for t in times],
        normal_values=left_ele,
        title=f"宿舍电量剩余趋势（{time_range}）",
        ylabel="剩余电量（度）",
        out_path=out,
    )

    return out


async def render_water_chart():
    times, left_water, left_free_water = await get_water_left(limit=24)

    if not times:
        return None

    out = "data/water.png"

    time_range = f'{time.strftime("%Y-%m-%d %H:%M", time.localtime(times[0] / 1000))} ～ {time.strftime("%Y-%m-%d %H:%M", time.localtime(times[-1] / 1000))}'

    plot_line(
        times=[time.strftime("%H:%M", time.localtime(t / 1000)) for t in times],
        normal_values=left_water,
        title=f"宿舍水量剩余趋势（{time_range}）",
        ylabel="剩余水量（吨）",
        out_path=out,
    )

    return out