from typing import Literal

from pydantic import BaseModel, Field


class Axis(BaseModel):
    label: str | None = None
    scale: Literal["linear", "categorical"] = "categorical"
    values: list[str] | None = None
    minimum: float | None = None
    maximum: float | None = None


class ChartSeries(BaseModel):
    name: str
    color: str | None = None
    points: list[tuple[str, float]]


class ChartIR(BaseModel):
    chart_type: Literal["bar", "line", "scatter", "pie", "unknown"] = "unknown"
    title: str | None = None
    plot_bbox: tuple[float, float, float, float] | None = None
    x_axis: Axis = Field(default_factory=Axis)
    y_axis: Axis = Field(default_factory=lambda: Axis(scale="linear"))
    series: list[ChartSeries] = Field(default_factory=list)
    confidence: float = 0.0