"""Parse the manual segmentation of the scenario into the final conversation format.

e.g. from scenario-manual_seg/volume1/chapter1.jsonl:
{"title": "..."}
{"speaker": "(scene change)", "text": ""}
{"speaker": "narrator", "text": "..."}
{"speaker": "narrator", "text": "..."}

{"speaker": "heroine", "text": "..."}

{"speaker": "protagonist", "text": "..."}

{"speaker": "heroine", "text": "..."}

{"speaker": "protagonist", "text": "..."}
...

to conversation/volume1/chapter1.json:
{
  "title": "...",
  "conversation": [
    {
      "request": [
        {"speaker": "narrator", "text": "..."},
        {"speaker": "narrator", "text": "..."},
      ],
      "response": [
        {"speaker": "heroine", "text": "..."}
      ]
    },
    {
      "request": [
        {"speaker": "protagonist", "text": "..."}
      ],
      "response": [
        {"speaker": "heroine", "text": "..."}
      ]
    },
    {
      "request": [
        {"speaker": "protagonist", "text": "..."},
...
"""
from ..utils import dump_conversation, map_to_file_or_dir, is_protagonist

import json
from sys import argv
from pathlib import Path
from typing import TypedDict


def generate_seg(ks_path: Path):
    ks_name = f"{ks_path.parent.name}/{ks_path.stem}"

    output_base = Path("./conversation")
    output_base.mkdir(exist_ok=True)
    (output_base / ks_path.parent.name).mkdir(exist_ok=True)

    d = TypedDict("d", {"title": str, "conversation": list})(
        {"title": "", "conversation": []}
    )
    key = "request"
    current_round = dict(request=[], response=[])
    current_scene = ""
    warned = 5
    with ks_path.open("r") as fi:
        d["title"] = json.loads(next(fi))["title"]

        for lineno, line in enumerate(fi, start=2):
            line = line.strip()
            if not line:  # segmentation point
                if key == "request":
                    key = "response"
                else:
                    d["conversation"].append(current_round)
                    current_round = dict(request=[], response=[])
                    key = "request"
                continue

            entry = json.loads(line)
            if entry["speaker"] == "(scene change)":
                dump_conversation(d, output_base / f"{ks_name}.json")
                assert (
                    not current_round["request"] and not current_round["response"]
                ), f"Unexpected scene change at line {lineno} in {ks_path}"
                current_scene = entry["text"]
                continue
            current_round[key].append(entry)
            if current_scene:
                current_round["scene"] = current_scene
            if entry["speaker"] != "narrator":
                if warned > 0 and (key == "request") != is_protagonist(
                    entry["speaker"]
                ):
                    warned -= 1
                    print(f"WARN: Unexpected speaker at line {lineno}")

    if current_round["request"]:
        assert current_round["response"], "Unexpected end of file"
        d["conversation"].append(current_round)
    else:
        assert d["conversation"][-1]["response"], "Unexpected end of file"

    dump_conversation(d, output_base / f"{ks_name}.json")


if __name__ == "__main__":
    if len(argv) != 2:
        print(f"Usage: python -m {__package__} path/to/scenario_manual_seg.jsonl")
        exit(1)
    map_to_file_or_dir(generate_seg, Path(argv[1]))