import sys
from tp00 import Tp00
import tpUtils
from constant import *
import json
import time


class Tp30:
    """
    #30 Ambient humidity meter
    """

    def __init__(self, slot, host=None):
        """
        コンストラクタ
        """

        self.slot = slot
        self.comm = I2C
        self.host = host

        # アドレス
        self.i2c_addr = 0x27

        # tp00
        self.tp00 = Tp00(self.slot, self.comm, self.host)
        self.tp00.start()

    def get_data(self):
        """
        値を取得します。
        """

        # リトライ処理
        for _ in range(1, 10):

            send_data = []
            send_data.append(
                {"act": "r", "add": self.i2c_addr, "cmd": 0x00, "len": 4})
            _result = self.tp00.send(json.dumps(send_data))

            result_data = json.loads(_result.decode())
            result = result_data[0]

            if result[0] == 127 and result[1] == 255:
                # 失敗
                time.sleep(0.03)
                continue

            # データから変換
            humd = ((result[0] & 0x3F) * 256 + result[1]) / 16383 * 100
            temp = (result[2] * 64 + (result[3] >> 2)) / 16383 * 165 - 40
            humd = round(humd, 1)
            temp = round(temp, 1)

            if humd == 98.4 or temp == -40:
                # 失敗
                time.sleep(0.03)
                continue

            # 正常
            rtn = {}
            rtn['humd'] = humd
            rtn['temp'] = temp
            return rtn

        # 異常
        raise ValueError('Tibbit #30 acquisition failed.')


if __name__ == '__main__':

    argvs = sys.argv
    if (len(argvs) <= 1):
        tpUtils.stderr('Need argv! [1]: slot')
        sys.exit(0)

    try:
        slot = argvs[1]
        host = None
        if (len(argvs) > 2):
            host = argvs[2]
        tp30 = Tp30(slot, host)
    except Exception as e:
        tpUtils.stderr(str(e.args))
        sys.exit(0)

    while True:
        try:
            data = input()
            recv_data = tp30.get_data()
            # jsonで取得する
            tpUtils.nodeOut(json.dumps(recv_data))
        except KeyboardInterrupt:
            sys.exit(0)
        except Exception as e:
            tpUtils.stderr(str(e.args))
            tpUtils.nodeOut("")