"""Growth Accounting explore type."""

from __future__ import annotations

from pathlib import Path
from typing import Any, Dict, Iterator, List, Optional

from ..views import View
from . import Explore


class GrowthAccountingExplore(Explore):
    """A Growth Accounting Explore, from Baseline Clients Last Seen."""

    type: str = "growth_accounting_explore"

    def _to_lookml(self, v1_name: Optional[str]) -> List[Dict[str, Any]]:
        """Generate LookML to represent this explore."""
        return [
            {
                "name": self.name,
                "view_name": self.views["base_view"],
                "joins": self.get_unnested_fields_joins_lookml(),
            }
        ]

    @staticmethod
    def from_views(views: List[View]) -> Iterator[GrowthAccountingExplore]:
        """
        If possible, generate a Growth Accounting explore for this namespace.

        Growth accounting explores are only created for growth_accounting views.
        """
        for view in views:
            if view.name == "growth_accounting":
                yield GrowthAccountingExplore(
                    view.name,
                    {"base_view": "growth_accounting"},
                )

    @staticmethod
    def from_dict(name: str, defn: dict, views_path: Path) -> GrowthAccountingExplore:
        """Get an instance of this explore from a dictionary definition."""
        return GrowthAccountingExplore(name, defn["views"], views_path)