from __future__ import annotations

from typing import Any, Dict, List

from ...schema import Field, Schema
from ...system import Mapper


class QsvMapper(Mapper):
    # Read

    def read_schema(self, stats: List[Dict[str, Any]]) -> Schema:  # type: ignore
        """Convert "qsv stats" output to Table Schema"""
        schema = Schema()
        for item in stats:
            type = "string"
            if item["type"] == "Integer":
                type = "integer"
            elif item["type"] == "Float":
                type = "number"
            elif item["type"] == "DateTime":
                type = "datetime"
            elif item["type"] == "Date":
                type = "date"
            descriptor = {"name": item["field"], "type": type}
            schema.add_field(Field.from_descriptor(descriptor))
        return schema