from typing import List, Dict, Tuple
from .test_run_class import TestRun
from . import sensors_rpc_plugin


plugin_fname = sensors_rpc_plugin.__file__.rsplit(".", 1)[0] + ".py"
SENSORS_PLUGIN_CODE = open(plugin_fname).read()


# TODO(koder): in case if node has more than one role sensor settigns might be incorrect
def start_sensors_stage(ctx: TestRun) -> None:
    if 'sensors' not in ctx.config:
        return

    per_role_config = {}
    for name, val in ctx.config['sensors'].copy():
        if isinstance(val, str):
            val = {vl.strip(): ".*" for vl in val.split(",")}
        elif isinstance(val, list):
            val = {vl: ".*" for vl in val}
        per_role_config[name] = val

    if 'all' in per_role_config:
        all_vl = per_role_config.pop('all')
        all_roles = set(per_role_config)

        for node in ctx.nodes:
            all_roles.update(node.info.roles)

        for name, vals in list(per_role_config.items()):
            new_vals = all_roles.copy()
            new_vals.update(vals)
            per_role_config[name] = new_vals

    for node in ctx.nodes:
        node_cfg = {}
        for role in node.info.roles:
            node_cfg.update(per_role_config.get(role, {}))

        if node_cfg:
            node.conn.upload_plugin(SENSORS_PLUGIN_CODE)
            ctx.sensors_run_on.add(node.info.node_id())
        node.conn.sensors.start()


def collect_sensors_stage(ctx: TestRun, stop: bool = True) -> None:
    for node in ctx.nodes:
        node_id = node.info.node_id()
        if node_id in ctx.sensors_run_on:

            if stop:
                data, collected_at = node.conn.sensors.stop()  # type: Dict[Tuple[str, str], List[int]], List[float]
            else:
                data, collected_at = node.conn.sensors.get_updates()

            for (source_name, sensor_name), values in data.items():
                path = "metric/{}/{}/{}".format(node_id, source_name, sensor_name)
                ctx.storage.append(path, values)
                ctx.storage.append("metric/{}/collected_at".format(node_id), collected_at)


# def delta(func, only_upd=True):
#     prev = {}
#     while True:
#         for dev_name, vals in func():
#             if dev_name not in prev:
#                 prev[dev_name] = {}
#                 for name, (val, _) in vals.items():
#                     prev[dev_name][name] = val
#             else:
#                 dev_prev = prev[dev_name]
#                 res = {}
#                 for stat_name, (val, accum_val) in vals.items():
#                     if accum_val:
#                         if stat_name in dev_prev:
#                             delta = int(val) - int(dev_prev[stat_name])
#                             if not only_upd or 0 != delta:
#                                 res[stat_name] = str(delta)
#                         dev_prev[stat_name] = val
#                     elif not only_upd or '0' != val:
#                         res[stat_name] = val
#
#                 if only_upd and len(res) == 0:
#                     continue
#                 yield dev_name, res
#         yield None, None
#
#