"""上传文件解析。"""

from __future__ import annotations

import csv
import io
import json
from typing import BinaryIO

from openpyxl import load_workbook


def parse_upload_file(file_obj: BinaryIO, filename: str) -> list[dict]:
    suffix = filename.rsplit(".", 1)[-1].lower() if "." in filename else ""
    content = file_obj.read()
    if suffix == "json":
        data = json.loads(content.decode("utf-8-sig"))
        if isinstance(data, dict):
            return data.get("domains") or data.get("rows") or []
        return data
    if suffix == "csv":
        text = content.decode("utf-8-sig")
        return list(csv.DictReader(io.StringIO(text)))
    if suffix in {"xlsx", "xls"}:
        workbook = load_workbook(io.BytesIO(content), read_only=True, data_only=True)
        try:
            sheet = workbook.active
            rows = list(sheet.iter_rows(values_only=True))
            if not rows:
                return []
            headers = [str(value or "").strip() for value in rows[0]]
            parsed = []
            for row in rows[1:]:
                item = {headers[index]: value for index, value in enumerate(row) if index < len(headers)}
                if any(value not in (None, "") for value in item.values()):
                    parsed.append(item)
            return parsed
        finally:
            workbook.close()
    raise ValueError(f"不支持的文件类型: {filename}")