#!/usr/bin/env python3
from __future__ import annotations

import json
from dataclasses import dataclass
from pathlib import Path

import click
import httpx

from eval import common


@dataclass(frozen=True)
class Config:
    api: str
    label_set: Path
    images: list[Path]
    domain_top_n: int
    top_k: int
    activate: bool
    limit: int
    out_dir: Path | None
    csv_path: Path | None
    summary: bool
    select_domain_n: int | None
    select_label_n: int | None
    min_domain_score: float | None
    min_label_score: float | None


def activate_label_set(client: httpx.Client, label_set_hash: str) -> None:
    r = client.post(f"/api/v1/label-sets/{label_set_hash}/activate")
    r.raise_for_status()


def to_row(
    image: Path,
    data: dict,
    *,
    select_domain_n: int | None,
    select_label_n: int | None,
    min_domain_score: float | None,
    min_label_score: float | None,
) -> dict[str, str]:
    domain_hits = data.get("domain_hits", [])
    label_hits = data.get("label_hits", [])
    selected_domains = common.select_hits(domain_hits, max_n=select_domain_n, min_score=min_domain_score)
    selected_labels = common.select_hits(label_hits, max_n=select_label_n, min_score=min_label_score)
    return {
        "image": str(image),
        "label_set_hash": data.get("label_set_hash", ""),
        "model_id": data.get("model_id", ""),
        "chosen_domains": "|".join(data.get("chosen_domains", [])),
        "selected_domains": "|".join(selected_domains),
        "selected_labels": "|".join(selected_labels),
        "domain_hits": "|".join(common.fmt_hit(d) for d in domain_hits),
        "label_hits": "|".join(common.fmt_hit(l) for l in label_hits),
        "elapsed_ms": str(data.get("elapsed_ms", "")),
        "elapsed_domain_ms": str(data.get("elapsed_domain_ms", "")),
        "elapsed_labels_ms": str(data.get("elapsed_labels_ms", "")),
    }


def run(cfg: Config) -> int:
    images = list(common.iter_images(cfg.images))
    if cfg.limit > 0:
        images = images[: cfg.limit]
    if not images:
        raise SystemExit("No images found.")

    rows: list[dict[str, str]] = []
    with httpx.Client(base_url=cfg.api, timeout=30) as client:
        label_set_hash = common.upload_label_set(client, cfg.label_set)
        if cfg.activate:
            activate_label_set(client, label_set_hash)

        for image in images:
            data = common.classify_one(
                client,
                label_set_hash,
                image_b64=common.encode_image_b64(image),
                domain_top_n=cfg.domain_top_n,
                top_k=cfg.top_k,
            )
            print(json.dumps({"image": str(image), "result": data}, ensure_ascii=True))
            rows.append(
                to_row(
                    image,
                    data,
                    select_domain_n=cfg.select_domain_n,
                    select_label_n=cfg.select_label_n,
                    min_domain_score=cfg.min_domain_score,
                    min_label_score=cfg.min_label_score,
                )
            )

    fieldnames = [
        "image",
        "label_set_hash",
        "model_id",
        "chosen_domains",
        "selected_domains",
        "selected_labels",
        "domain_hits",
        "label_hits",
        "elapsed_ms",
        "elapsed_domain_ms",
        "elapsed_labels_ms",
    ]

    out_dir = common.resolve_out_dir(cfg.api, cfg.out_dir)
    if cfg.csv_path and rows:
        common.write_csv(cfg.csv_path, rows, fieldnames)
    elif rows:
        out_path = out_dir / f"{cfg.label_set.stem}_{common.timestamp()}.csv"
        common.write_csv(out_path, rows, fieldnames)

    if cfg.summary:
        summary = common.summarize_latency(rows)
        summary_path = out_dir / f"{cfg.label_set.stem}_summary_{common.timestamp()}.csv"
        common.write_csv(summary_path, [summary], list(summary.keys()))

    return 0


@click.command()
@click.option("--api", default="http://localhost:7860", show_default=True)
@click.option("--label-set", "label_set", required=True, type=click.Path(path_type=Path))
@click.option("--images", multiple=True, required=True, type=click.Path(path_type=Path))
@click.option("--domain-top-n", default=2, show_default=True, type=int)
@click.option("--top-k", default=5, show_default=True, type=int)
@click.option("--activate", is_flag=True, default=False)
@click.option("--limit", default=0, show_default=True, type=int)
@click.option("--out-dir", type=click.Path(path_type=Path))
@click.option("--csv", "csv_path", type=click.Path(path_type=Path))
@click.option("--summary", is_flag=True, default=False)
@click.option("--select-domain-n", type=int, default=None)
@click.option("--select-label-n", type=int, default=None)
@click.option("--min-domain-score", type=float, default=None)
@click.option("--min-label-score", type=float, default=None)
def cli(
    api: str,
    label_set: Path,
    images: tuple[Path, ...],
    domain_top_n: int,
    top_k: int,
    activate: bool,
    limit: int,
    out_dir: Path | None,
    csv_path: Path | None,
    summary: bool,
    select_domain_n: int | None,
    select_label_n: int | None,
    min_domain_score: float | None,
    min_label_score: float | None,
) -> None:
    cfg = Config(
        api=api,
        label_set=label_set,
        images=list(images),
        domain_top_n=domain_top_n,
        top_k=top_k,
        activate=activate,
        limit=limit,
        out_dir=out_dir,
        csv_path=csv_path,
        summary=summary,
        select_domain_n=select_domain_n,
        select_label_n=select_label_n,
        min_domain_score=min_domain_score,
        min_label_score=min_label_score,
    )
    raise SystemExit(run(cfg))


if __name__ == "__main__":
    cli()