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# Copyright (c) Xuanyi Dong [GitHub D-X-Y], 2021.02 #
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# python exps/trading/organize_results.py
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import sys, argparse
import numpy as np
from typing import List, Text
from collections import defaultdict, OrderedDict
from pathlib import Path
from pprint import pprint
import ruamel.yaml as yaml

lib_dir = (Path(__file__).parent / ".." / ".." / "lib").resolve()
if str(lib_dir) not in sys.path:
    sys.path.insert(0, str(lib_dir))

import qlib
from qlib.config import REG_CN
from qlib.workflow import R


class QResult:

  def __init__(self):
    self._result = defaultdict(list)

  def append(self, key, value):
    self._result[key].append(value)

  @property
  def result(self):
    return self._result

  def update(self, metrics, filter_keys=None):
    for key, value in metrics.items():
      if filter_keys is not None and key in filter_keys:
        key = filter_keys[key]
      elif filter_keys is not None:
        continue
      self.append(key, value)

  @staticmethod
  def full_str(xstr, space):
    xformat = '{:' + str(space) + 's}'
    return xformat.format(str(xstr))

  def info(self, keys: List[Text], separate: Text = '', space: int = 25, show=True):
    avaliable_keys = []
    for key in keys:
      if key not in self.result:
        print('There are invalid key [{:}].'.format(key))
      else:
        avaliable_keys.append(key)
    head_str = separate.join([self.full_str(x, space) for x in avaliable_keys])
    values = []
    for key in avaliable_keys:
      current_values = self._result[key]
      mean = np.mean(current_values)
      std = np.std(current_values)
      values.append('{:.4f} $\pm$ {:.4f}'.format(mean, std))
    value_str = separate.join([self.full_str(x, space) for x in values])
    if show:
      print(head_str)
      print(value_str)
    else:
      return head_str, value_str


def compare_results(heads, values, names, space=10):
  for idx, x in enumerate(heads):
    assert x == heads[0], '[{:}] {:} vs {:}'.format(idx, x, heads[0])
  new_head = QResult.full_str('Name', space) + heads[0]
  print(new_head)
  for name, value in zip(names, values):
    xline = QResult.full_str(name, space) + value
    print(xline)


def filter_finished(recorders):
    returned_recorders = dict()
    not_finished = 0
    for key, recorder in recorders.items():
        if recorder.status == "FINISHED":
            returned_recorders[key] = recorder
        else:
            not_finished += 1
    return returned_recorders, not_finished


def main(xargs):
    R.reset_default_uri(xargs.save_dir)
    experiments = R.list_experiments()

    key_map = {"IC": "IC",
               "ICIR": "ICIR",
               "Rank IC": "Rank_IC",
               "Rank ICIR": "Rank_ICIR",
               "excess_return_with_cost.annualized_return": "Annualized_Return",
               "excess_return_with_cost.information_ratio": "Information_Ratio",
               "excess_return_with_cost.max_drawdown": "Max_Drawdown"}
    all_keys = list(key_map.values())

    print("There are {:} experiments.".format(len(experiments)))
    head_strs, value_strs, names = [], [], []
    for idx, (key, experiment) in enumerate(experiments.items()):
        if experiment.id == '0':
          continue
        recorders = experiment.list_recorders()
        recorders, not_finished = filter_finished(recorders)
        print(
            "====>>>> {:02d}/{:02d}-th experiment {:9s} has {:02d}/{:02d} finished recorders.".format(
                idx, len(experiments), experiment.name, len(recorders), len(recorders) + not_finished
            )
        )
        result = QResult()
        for recorder_id, recorder in recorders.items():
          result.update(recorder.list_metrics(), key_map)
        head_str, value_str = result.info(all_keys, show=False)
        head_strs.append(head_str)
        value_strs.append(value_str)
        names.append(experiment.name)
    compare_results(head_strs, value_strs, names, space=10)


if __name__ == "__main__":

    parser = argparse.ArgumentParser("Show Results")
    parser.add_argument("--save_dir", type=str, default="./outputs/qlib-baselines", help="The checkpoint directory.")
    args = parser.parse_args()

    provider_uri = "~/.qlib/qlib_data/cn_data"
    qlib.init(provider_uri=provider_uri, region=REG_CN)

    main(args)