import os
from utils import read_json_file, parse, write_jsonl_file


def parse_dialogue_knowledge(utterances):
    dialogue = []

    for utter in utterances:
        dialogue.append({"roles": utter["speakers"], "utterance": utter["utterance"]})

    knowledge = {"type": "dict", "value": {"dialogue": dialogue}}

    return knowledge


def preprocess(args, split):
    infile = os.path.join(args.input_dir, f"friendsqa_{split}.json")

    if split == "trn":
        split = "train"
    elif split == "tst":
        split = "test"

    outfile = os.path.join(args.output_dir, f"{split}.jsonl")

    data = read_json_file(infile)["data"]
    processed_data = []

    for part in data:
        for example in part["paragraphs"]:
            assert "utterances:" in example, example.keys()
            knowledge = parse_dialogue_knowledge(example["utterances:"])

            for qa in example["qas"]:
                dial = {
                    "turn": "single",
                    "locale": "en",
                    "dialog": [],
                    "knowledge": knowledge,
                }

                dial["dialog"].append({"roles": ["USER"], "utterance": qa["question"]})

                for answer in qa["answers"]:
                    dial["dialog"].append(
                        {
                            "roles": ["SYSTEM"],
                            "utterance": answer["answer_text"],
                            "start": answer["inner_start"],
                            "end": answer["inner_end"],
                            "dialog_turn": answer["utterance_id"],
                        }
                    )
                processed_data.append(dial)

    write_jsonl_file(processed_data, outfile)


if __name__ == "__main__":
    args = parse()
    preprocess(args, "trn")
    preprocess(args, "dev")
    preprocess(args, "tst")