import os
from utils import read_json_file, parse, write_jsonl_file


def parse_domains(tasks):
    domains = set()

    for task in tasks:
        domain: str = task["Task"].split("_")[0]
        if domain.endswith("s"):
            domain = domain[:-1]
        domains.add(domain)

    return list(domains)


def parse_belief_states(state):
    belief_state = []
    for intent in state:
        intent_state = {"intent": intent, "slot_value_table": []}

        for slot in state[intent]:
            intent_state["slot_value_table"].append(
                {
                    "slot": slot,
                    "relation": state[intent][slot]["relation"],
                    "value": state[intent][slot]["value"],
                }
            )

        belief_state.append(intent_state)

    return belief_state


def preprocess(args):
    filenames = [filename for filename in os.listdir(args.input_dir)]

    data = {"train": [], "dev": [], "test": [], "fewshot": []}

    fewshot_dials = []
    for filename in filenames:
        if "fewshot" in filename:
            fewshot_data = read_json_file(os.path.join(args.input_dir, filename))
            fewshot_dials += fewshot_data["fewshot_dials"]

    fewshot_dials = set(fewshot_dials)

    for filename in filenames:
        # ignore this file
        if filename == "dict_en_zh.json" or "fewshot" in filename:
            continue
        path = os.path.join(args.input_dir, filename)
        origin_data = read_json_file(path)
        locale = filename[:2]
        partition = filename.split("_")[1]

        if partition.endswith(".json"):
            partition = partition[:-5]

        if partition == "valid":
            partition = "dev"

        for dial_id, dialog in origin_data.items():
            parsed_dialog = {
                "turn": "multi",
                "domain": parse_domains(dialog["Scenario"]["WizardCapabilities"]),
                "locale": locale,
                "dialog": [],
            }

            last_query = None
            querying_result = None
            for event in dialog["Events"]:
                turn = dict()
                turn["role"] = event["Agent"]

                if turn["role"] == "User":
                    turn["active_intent"] = event["active_intent"]
                    turn["belief_state"] = parse_belief_states(event["state"])

                else:
                    if turn["role"] == "Wizard" and "Text" not in event:
                        assert last_query is None
                        last_query = {
                            "Constraints": event["Constraints"],
                            "API": event["API"],
                        }
                        continue
                    elif turn["role"] == "KnowledgeBase":
                        assert querying_result is None
                        querying_result = {
                            "Item": event["Item"],
                            "TotalItems": event["TotalItems"],
                            "Topic": event["Topic"],
                        }

                        continue
                    else:
                        if last_query is not None:
                            turn["query"] = last_query
                            last_query = None

                            turn["querying_result"] = querying_result
                            querying_result = None
                        if event["PrimaryItem"]:
                            turn["main_items"] = [event["PrimaryItem"]]

                        if event["SecondaryItem"]:
                            turn["main_items"].append(event["SecondaryItem"])

                turn["dialog_act"] = []
                Actions = event["Actions"]
                das = dict()

                for action in Actions:
                    act = action.pop("act")
                    if act not in das:
                        das[act] = []
                    das[act].append(action)

                for act in das:
                    turn["dialog_act"].append(
                        {"act": act, "slot_value_table": das[act]}
                    )

                turn["utterance"] = event["Text"]

                parsed_dialog["dialog"].append(turn)

            data[partition].append(parsed_dialog)

            if dial_id in fewshot_dials:
                data["fewshot"].append(parsed_dialog)

    for partition in data:
        if data[partition]:
            write_jsonl_file(
                data[partition], os.path.join(args.output_dir, f"{partition}.jsonl")
            )


if __name__ == "__main__":
    args = parse()
    preprocess(args)