#!/usr/bin/env python3
"""Figure 4: coarse provider-account calculations relative to the threshold."""

from __future__ import annotations

import json

import matplotlib.pyplot as plt
from matplotlib.ticker import FixedLocator, FuncFormatter

from style import (
    BLUE,
    FULL_WIDTH_IN,
    INK,
    LIGHT_GREY,
    MID_GREY,
    WHITE,
    HERE,
    assert_text_floor,
    remove_spines,
    save_figure,
)


SPEC = HERE / "specs" / "provider_operations_coarse.json"
OUTPUT = HERE / "fig_provider_operations.pdf"
FIGURE_TEXT_PT = 8.5

TOP_LEVEL_ALLOW_LIST = {
    "schema_version",
    "artifact_id",
    "status",
    "source_window",
    "policy_threshold_operations",
    "operation_convention",
    "rate_registry",
    "disclosure_approval",
    "descriptive_operation_calculations",
    "privacy",
}
EXPECTED_IDS = [
    "minute_observed_per_sku",
    "independent_sku_peaks_per_sku",
    "independent_sku_peaks_uniform",
]


def load_coarse_artifact() -> tuple[list[dict], float]:
    data = json.loads(SPEC.read_text(encoding="utf-8"))
    extra = set(data) - TOP_LEVEL_ALLOW_LIST
    missing = TOP_LEVEL_ALLOW_LIST - set(data)
    if extra or missing:
        raise ValueError(f"coarse provider schema mismatch; extra={extra}, missing={missing}")
    if data["schema_version"] != "1":
        raise ValueError("unsupported coarse provider schema")
    if data["status"] not in {"provisional", "manifest_bound_final"}:
        raise ValueError("provider artifact must declare provisional or final status")
    if data["status"] == "manifest_bound_final":
        for key in ("operation_convention", "rate_registry", "disclosure_approval"):
            if not data[key].get("identifier") and not data[key].get("reference"):
                raise ValueError(f"final provider artifact lacks required {key} binding")
    if data["source_window"]["inclusive_minute_bin_duration_seconds"] != 4_074_120:
        raise ValueError("provider duration changed; review manuscript and plot")
    privacy = data["privacy"]
    if privacy != {
        "coarse_allow_list_enforced": True,
        "contains_row_level_records": False,
        "contains_provider_or_account_identifiers": False,
    }:
        raise ValueError("provider coarse-artifact privacy declaration changed")
    calculations = data["descriptive_operation_calculations"]
    if [item["id"] for item in calculations] != EXPECTED_IDS:
        raise ValueError("provider calculation bases or ordering changed")
    threshold = float(data["policy_threshold_operations"])
    if threshold != 1e25:
        raise ValueError("unexpected policy threshold")
    for item in calculations:
        if set(item) != {"id", "short_label", "operations", "marker"}:
            raise ValueError(f"{item['id']} contains a field outside the coarse allow-list")
        item["ratio"] = float(item["operations"]) / threshold
        if item["operations"] <= 0:
            raise ValueError("log-scale operation values must be positive")
    return calculations, threshold


def tick_formatter(value, _position):
    labels = {0.5: "0.5", 1.0: "1", 2.0: "2", 5.0: "5"}
    return labels.get(round(float(value), 8), "")


def main() -> None:
    calculations, _threshold = load_coarse_artifact()
    y_values = [2, 1, 0]

    fig, ax = plt.subplots(figsize=(FULL_WIDTH_IN, 1.72))
    fig.subplots_adjust(left=0.245, right=0.985, bottom=0.30, top=0.90)

    for y in y_values:
        ax.axhline(y, color=LIGHT_GREY, lw=0.5, zorder=0)
    ax.axvline(1, color=INK, lw=0.8, ls=(0, (3, 2)), zorder=1)

    for item, y in zip(calculations, y_values):
        ratio = item["ratio"]
        face = BLUE if item["id"] == "minute_observed_per_sku" else WHITE
        ax.scatter(
            [ratio],
            [y],
            s=34,
            marker=item["marker"],
            facecolor=face,
            edgecolor=BLUE,
            linewidth=1.0,
            zorder=3,
        )
        if ratio > 4:
            ax.annotate(
                f"{ratio:.3f}",
                (ratio, y),
                xytext=(-6, 0),
                textcoords="offset points",
                ha="right",
                va="center",
                color=BLUE,
                fontsize=FIGURE_TEXT_PT,
            )
        else:
            ax.annotate(
                f"{ratio:.3f}",
                (ratio, y),
                xytext=(6, 0),
                textcoords="offset points",
                ha="left",
                va="center",
                color=BLUE,
                fontsize=FIGURE_TEXT_PT,
            )

    ax.text(
        1.0,
        2.27,
        r"threshold $T$",
        ha="center",
        va="bottom",
        fontsize=FIGURE_TEXT_PT,
        bbox={"facecolor": WHITE, "edgecolor": "none", "pad": 0.8},
        zorder=5,
    )
    ax.set_xscale("log")
    ax.set_xlim(0.40, 7.0)
    ax.set_ylim(-0.55, 2.48)
    ax.xaxis.set_major_locator(FixedLocator([0.5, 1.0, 2.0, 5.0]))
    ax.xaxis.set_major_formatter(FuncFormatter(tick_formatter))
    ax.minorticks_off()
    ax.set_yticks(y_values)
    ax.set_yticklabels([item["short_label"] for item in calculations])
    ax.tick_params(axis="both", labelsize=FIGURE_TEXT_PT)
    ax.tick_params(axis="y", length=0, pad=7)
    ax.set_xlabel(r"calculated operations / threshold $T$", fontsize=FIGURE_TEXT_PT)
    remove_spines(ax, ("top", "right", "left"))
    assert_text_floor(fig, FIGURE_TEXT_PT)
    save_figure(
        fig,
        OUTPUT,
        subject="Provisional coarse provider-account operation calculations relative to T",
    )


if __name__ == "__main__":
    main()