# from . import DataHandler #此时是导入文件
from .DataStream import DataWriteStream, day_stamp
from .DataStream import EChPosmap as pos_map
import numpy as np

__all__ = ['ChannelWriter']

import logging
log = logging.getLogger('writer')

class ChannelWriter(DataWriteStream):
    def __init__(self, hfive):
        DataWriteStream.__init__(self, hfive)
        dim = pos_map.dim()
        self._cache = np.zeros((dim, 86400))

    def write(self, method, params):
        flush = True
        if method == 'ch_commit':
            self._onCommit(params)
        elif method == 'ch_succ':
            self._onSucc(params)
        elif method == 'ch_fail':
            self._onFail(params)
        else:
            flush = False

        if flush:
            hfive = self.file
            hfive.flush()
        pass

    def write_batch(self, batches):
        for path, items in batches.items():
            self._write_batch(path, items)

    def _write_batch(self, path, messages):
        def _commit(input):
            return input['time'], input['channel_amount']
        def _succ(input):
            return input['time'], input['channel_amount'], input['period']
        def _fail(input):
            return input['time'], input['channel_amount'], input['period']
        def _pos(time):
            today = day_stamp(time)
            return time - today

        dset = self._data_set(path=path)
        self._cache[:, :] = dset

        for method, params in messages:
            if method == 'ch_commit':
                time, channel_amount = _commit(params)
                pos = _pos(time)
                rows = [pos_map.commit_count, pos_map.commit_amounts]
                self._cache[rows, pos] += [1, channel_amount]
            elif method == 'ch_succ':
                time, channel_amount, period = _succ(params)
                pos = _pos(time)
                rows = [pos_map.succ_count, pos_map.succ_amounts, pos_map.succ_periods]
                self._cache[rows, pos] += [1, channel_amount, period]
            elif method == 'ch_fail':
                time, channel_amount, period = _fail(params)
                pos = _pos(time)
                rows = [pos_map.fail_count, pos_map.fail_amounts, pos_map.fail_periods]
                self._cache[rows, pos] += [1, channel_amount, period]

        dset[:, :] = self._cache
        hfive = self.file
        hfive.flush()

    def _onCommit(self, params):
        def parse(input):
            return input['channel_name'], input['time'], input['spec'], input['card_type'], input['channel_amount']

        chname, time, spec, card_type, channel_amount = parse(params)
        dset, pos = self.path_pos(chname, time, spec, card_type)

        rows = [pos_map.commit_count, pos_map.commit_amounts]
        vals = [1, channel_amount]
        dset[rows, pos] += vals
        pass

    def _onSucc(self, params):
        def parse(input):
            return input['channel_name'], input['time'], input['spec'], input['card_type'], input['channel_amount'], input['period']

        chname, time, spec, card_type, channel_amount, period = parse(params)
        dset, pos = self.path_pos(chname, time, spec, card_type)

        rows = [pos_map.succ_count, pos_map.succ_amounts, pos_map.succ_periods]
        vals = [1, channel_amount, period]
        dset[rows, pos] += vals
        pass

    def _onFail(self, params):
        def parse(input):
            return input['channel_name'], input['time'], input['spec'], input['card_type'], input['channel_amount'], input['period']

        chname, time, spec, card_type, channel_amount, period = parse(params)
        dset, pos = self.path_pos(chname, time, spec, card_type)

        rows = [pos_map.fail_count, pos_map.fail_amounts, pos_map.fail_periods]
        vals = [1, channel_amount, period]
        dset[rows, pos] += vals
        pass

    def get_path(self, method, params):
        def _parse(input):
            return input['channel_name'], input['time'], input['spec'], input['card_type']
        def _path(input):
            chname, time, spec, card_type = _parse(input)
            today = day_stamp(time)
            path = f'/{self._version}/{today}/{chname}/{card_type}/{spec}'
            return path

        if method in ['ch_commit','ch_succ','ch_fail']:
            path = _path(params)
            return path
        else:
            return None

    def path_pos(self, chname, time, spec, card_type):
        today = day_stamp(time)
        path = f'/{self._version}/{today}/{chname}/{card_type}/{spec}'
        log.debug("%s,%s", 'ChannelWriter', path)

        dset = self._data_set(path=path)
        return dset, time - today

    def _data_set(self, path):
        hfive = self.file
        if path not in hfive:
            dim = pos_map.dim()
            dset = hfive.create_dataset(path, (dim, 86400), chunks=(dim, 900))
            dset[:, :] = np.zeros((dim, 86400))
            hfive.flush()
        else:
            dset = hfive[path]
        return dset