# Copyright (c) Microsoft. All rights reserved.
# Licensed under the MIT license.
import os
import joblib

from interpret.ext.glassbox import LGBMExplainableModel
from azureml.automl.core.shared.constants import MODEL_PATH
from azureml.core.experiment import Experiment
from azureml.core.dataset import Dataset
from azureml.core.run import Run
from azureml.interpret.mimic_wrapper import MimicWrapper
from azureml.interpret.scoring.scoring_explainer import TreeScoringExplainer
from azureml.train.automl.runtime.automl_explain_utilities import (
    automl_setup_model_explanations,
    automl_check_model_if_explainable,
)


OUTPUT_DIR = "./outputs/"
os.makedirs(OUTPUT_DIR, exist_ok=True)

# Get workspace from the run context
run = Run.get_context()
ws = run.experiment.workspace

# Get the AutoML run object from the experiment name and the workspace
experiment = Experiment(ws, "<<experiment_name>>")
automl_run = Run(experiment=experiment, run_id="<<run_id>>")

# Check if this AutoML model is explainable
if not automl_check_model_if_explainable(automl_run):
    raise Exception(
        "Model explanations are currently not supported for "
        + automl_run.get_properties().get("run_algorithm")
    )

# Download the best model from the artifact store
automl_run.download_file(name=MODEL_PATH, output_file_path="model.pkl")

# Load the AutoML model into memory
fitted_model = joblib.load("model.pkl")

# Get the train dataset from the workspace
train_dataset = Dataset.get_by_name(workspace=ws, name="<<train_dataset_name>>")
# Drop the labeled column to get the training set.
X_train = train_dataset.drop_columns(columns=["<<target_column_name>>"])
y_train = train_dataset.keep_columns(columns=["<<target_column_name>>"], validate=True)

# Get the test dataset from the workspace
test_dataset = Dataset.get_by_name(workspace=ws, name="<<test_dataset_name>>")
# Drop the labeled column to get the testing set.
X_test = test_dataset.drop_columns(columns=["<<target_column_name>>"])

# Setup the class for explaining the AutoML models
automl_explainer_setup_obj = automl_setup_model_explanations(
    fitted_model, "<<task>>", X=X_train, X_test=X_test, y=y_train, automl_run=automl_run
)

# Initialize the Mimic Explainer
explainer = MimicWrapper(
    ws,
    automl_explainer_setup_obj.automl_estimator,
    LGBMExplainableModel,
    init_dataset=automl_explainer_setup_obj.X_transform,
    run=automl_explainer_setup_obj.automl_run,
    features=automl_explainer_setup_obj.engineered_feature_names,
    feature_maps=[automl_explainer_setup_obj.feature_map],
    classes=automl_explainer_setup_obj.classes,
)

# Compute the engineered explanations
engineered_explanations = explainer.explain(
    ["local", "global"],
    tag="engineered explanations",
    eval_dataset=automl_explainer_setup_obj.X_test_transform,
)

# Compute the raw explanations
raw_explanations = explainer.explain(
    ["local", "global"],
    get_raw=True,
    tag="raw explanations",
    raw_feature_names=automl_explainer_setup_obj.raw_feature_names,
    eval_dataset=automl_explainer_setup_obj.X_test_transform,
    raw_eval_dataset=automl_explainer_setup_obj.X_test_raw,
)

print("Engineered and raw explanations computed successfully")

# Initialize the ScoringExplainer
scoring_explainer = TreeScoringExplainer(
    explainer.explainer, feature_maps=[automl_explainer_setup_obj.feature_map]
)

# Pickle scoring explainer locally
with open("scoring_explainer.pkl", "wb") as stream:
    joblib.dump(scoring_explainer, stream)

# Upload the scoring explainer to the automl run
automl_run.upload_file("outputs/scoring_explainer.pkl", "scoring_explainer.pkl")