"""Table view helpers for the Streamlit GRM leaderboard."""

from collections.abc import Iterable

import pandas as pd

from benchmarks import BENCHMARKS, CATEGORIES, CATEGORY_DISPLAY, GRM_BENCH_DIMENSIONS
from scores import MODEL_METADATA, MODEL_SCORES
from scoring import build_leaderboard, compute_category_components, compute_grm_score, get_score

VIEW_SUMMARY = "Summary"
VIEW_CATEGORY = "Category"
VIEW_MATRIX = "Benchmark matrix"


def format_score(value: float | None) -> str:
    return f"{value:.1f}" if value is not None else "TBD"


def _with_tbd(frame: pd.DataFrame) -> pd.DataFrame:
    return frame.astype("object").where(pd.notna(frame), "TBD").astype(str)


def category_options() -> list[str]:
    return ["All", *[CATEGORY_DISPLAY[category] for category in CATEGORIES]]


def category_from_label(label: str) -> str | None:
    for category, display in CATEGORY_DISPLAY.items():
        if label == display:
            return category
    return None


def available_domains() -> list[str]:
    return sorted({benchmark["domain"] for benchmark in BENCHMARKS})


def available_priorities() -> list[str]:
    return sorted({benchmark["priority"] for benchmark in BENCHMARKS})


def available_sources() -> list[str]:
    return sorted({benchmark["source"] for benchmark in BENCHMARKS})


def parameter_bounds() -> tuple[float, float]:
    values = [
        metadata["parameter_b"]
        for metadata in MODEL_METADATA.values()
        if isinstance(metadata.get("parameter_b"), int | float)
    ]
    return (0.0, max(values) if values else 120.0)


def _matches_search(benchmark: dict, search: str) -> bool:
    if not search:
        return True
    target = " ".join(
        str(benchmark.get(key, ""))
        for key in ["name", "description", "summary", "domain", "source", "priority"]
    ).lower()
    return search.lower() in target


def filter_benchmarks(
    category: str | None = None,
    priorities: Iterable[str] | None = None,
    sources: Iterable[str] | None = None,
    domains: Iterable[str] | None = None,
    search: str = "",
    include_non_scored: bool = False,
) -> list[dict]:
    priority_set = set(priorities or [])
    source_set = set(sources or [])
    domain_set = set(domains or [])
    benchmarks = []

    for benchmark in BENCHMARKS:
        if category and benchmark["category"] != category:
            continue
        if priority_set and benchmark["priority"] not in priority_set:
            continue
        if source_set and benchmark["source"] not in source_set:
            continue
        if domain_set and benchmark["domain"] not in domain_set:
            continue
        if not include_non_scored and not benchmark["included_in_grm"]:
            continue
        if not _matches_search(benchmark, search):
            continue
        benchmarks.append(benchmark)

    return benchmarks


def _format_leaderboard_rows(rows: list[dict], use_filtered_label: bool = False) -> pd.DataFrame:
    label = "Filtered GRM Score" if use_filtered_label else "GRM Score"
    records = []
    for row in rows:
        records.append(
            {
                "Rank": row["Rank"],
                "Model": row["Model"],
                label: row["GRM Score"],
                "Roleplay": row["Roleplay (33%)"],
                "Actions": row["Actions (33%)"],
                "General": row["General (33%)"],
                "Family": row.get("Family"),
                "Size": row.get("Size"),
            }
        )
    return pd.DataFrame.from_records(records)


def build_summary_frame(
    include_closed: bool = True,
    parameter_range: tuple[float, float] | None = None,
) -> pd.DataFrame:
    return _with_tbd(_format_leaderboard_rows(build_leaderboard(include_closed=include_closed, parameter_range=parameter_range)))


def build_category_frame(
    category: str,
    include_closed: bool = True,
    benchmark_ids: set[str] | None = None,
    filtered_score: bool = False,
    parameter_range: tuple[float, float] | None = None,
) -> pd.DataFrame:
    rows = build_leaderboard(
        include_closed=include_closed,
        benchmark_ids=benchmark_ids if filtered_score else None,
        parameter_range=parameter_range,
    )
    records = []
    category_name = CATEGORY_DISPLAY[category]

    for row in rows:
        components = compute_category_components(MODEL_SCORES[row["Model"]], category, benchmark_ids)
        records.append(
            {
                "Rank": row["Rank"],
                "Model": row["Model"],
                "Filtered GRM Score" if filtered_score else "GRM Score": row["GRM Score"],
                f"{category_name} Score": components["score"],
                "Core Avg": components["core_avg"],
                "Supplementary Avg": components["supplementary_avg"],
                "Missing": f"{components['missing']} / {components['benchmarks']}",
                "Family": row.get("Family"),
                "Size": row.get("Size"),
            }
        )

    return _with_tbd(pd.DataFrame.from_records(records))


def build_benchmark_matrix_frame(
    benchmarks: list[dict],
    include_closed: bool = True,
    recalculate_visible: bool = False,
    parameter_range: tuple[float, float] | None = None,
) -> pd.DataFrame:
    benchmark_ids = {benchmark["id"] for benchmark in benchmarks}
    rows = build_leaderboard(
        include_closed=include_closed,
        benchmark_ids=benchmark_ids if recalculate_visible else None,
        parameter_range=parameter_range,
    )
    records = []

    for row in rows:
        record = {
            "Rank": row["Rank"],
            "Model": row["Model"],
            "Filtered GRM Score" if recalculate_visible else "GRM Score": row["GRM Score"],
            "Roleplay": row["Roleplay (33%)"],
            "Actions": row["Actions (33%)"],
            "General": row["General (33%)"],
        }
        for benchmark in benchmarks:
            score = get_score(row["Model"], benchmark["id"])
            record[benchmark["name"]] = score
        records.append(record)

    return _with_tbd(pd.DataFrame.from_records(records))


def build_score_explorer_frame(
    view: str,
    category_label: str,
    benchmarks: list[dict],
    include_closed: bool,
    recalculate_visible: bool,
    parameter_range: tuple[float, float] | None = None,
) -> pd.DataFrame:
    selected_category = category_from_label(category_label)
    benchmark_ids = {benchmark["id"] for benchmark in benchmarks}

    if view == VIEW_SUMMARY:
        if recalculate_visible and benchmark_ids:
            return _with_tbd(_format_leaderboard_rows(
                build_leaderboard(
                    include_closed=include_closed,
                    benchmark_ids=benchmark_ids,
                    parameter_range=parameter_range,
                ),
                use_filtered_label=True,
            ))
        return build_summary_frame(include_closed=include_closed, parameter_range=parameter_range)

    if view == VIEW_CATEGORY:
        category = selected_category or "ROLEPLAY"
        return build_category_frame(
            category,
            include_closed=include_closed,
            benchmark_ids=benchmark_ids,
            filtered_score=recalculate_visible,
            parameter_range=parameter_range,
        )

    return build_benchmark_matrix_frame(
        benchmarks,
        include_closed=include_closed,
        recalculate_visible=recalculate_visible,
        parameter_range=parameter_range,
    )


def build_benchmark_registry_frame(benchmarks: list[dict]) -> pd.DataFrame:
    records = []
    for benchmark in benchmarks:
        records.append(
            {
                "Benchmark": benchmark["name"],
                "Category": CATEGORY_DISPLAY[benchmark["category"]],
                "Domain": benchmark["domain"],
                "Source": benchmark["source"],
                "Weight": benchmark["calc_weight"],
                "Included in GRM": "Yes" if benchmark["included_in_grm"] else "No",
                "Description": benchmark["description"],
                "Summary": benchmark["summary"],
                "Paper / Repo": benchmark.get("paper") or "",
            }
        )
    return _with_tbd(pd.DataFrame.from_records(records))


def build_grm_dimensions_frame(show_non_scored: bool = True) -> pd.DataFrame:
    dimensions = [
        dimension
        for dimension in GRM_BENCH_DIMENSIONS
        if show_non_scored or dimension["included_in_grm"]
    ]
    return _with_tbd(pd.DataFrame.from_records(
        {
            "Dimension": dimension["dimension"],
            "Phase": dimension["phase"],
            "Included in GRM": "Yes" if dimension["included_in_grm"] else "No",
            "Notes": dimension["notes"],
        }
        for dimension in dimensions
    ))


def build_model_detail_frame(model_name: str) -> pd.DataFrame:
    model_scores = MODEL_SCORES.get(model_name, {})
    records = []
    for category in CATEGORIES:
        components = compute_category_components(model_scores, category)
        records.append(
            {
                "Category": CATEGORY_DISPLAY[category],
                "Score": components["score"],
                "Core Avg": components["core_avg"],
                "Supplementary Avg": components["supplementary_avg"],
                "Missing": f"{components['missing']} / {components['benchmarks']}",
            }
        )
    return _with_tbd(pd.DataFrame.from_records(records))


def build_model_benchmark_scores(model_name: str, limit: int = 6, strongest: bool = True) -> pd.DataFrame:
    model_scores = MODEL_SCORES.get(model_name, {})
    scored = [
        {
            "Benchmark": benchmark["name"],
            "Category": CATEGORY_DISPLAY[benchmark["category"]],
            "Domain": benchmark["domain"],
            "Score": model_scores.get(benchmark["id"]),
        }
        for benchmark in BENCHMARKS
        if model_scores.get(benchmark["id"]) is not None
    ]
    scored.sort(key=lambda item: item["Score"], reverse=strongest)
    return _with_tbd(pd.DataFrame.from_records(scored[:limit]))


def model_options(
    include_closed: bool = True,
    parameter_range: tuple[float, float] | None = None,
) -> list[str]:
    rows = build_leaderboard(include_closed=include_closed, parameter_range=parameter_range)
    return [row["Model"] for row in rows]


def benchmark_options(benchmarks: list[dict]) -> list[str]:
    return [benchmark["name"] for benchmark in benchmarks]


def find_benchmark_by_name(name: str) -> dict | None:
    for benchmark in BENCHMARKS:
        if benchmark["name"] == name:
            return benchmark
    return None


def score_stats(
    include_closed: bool = True,
    parameter_range: tuple[float, float] | None = None,
) -> dict[str, str]:
    rows = build_leaderboard(include_closed=include_closed, parameter_range=parameter_range)
    open_rows = [row for row in rows if MODEL_METADATA.get(row["Model"], {}).get("open_weights")]
    active_benchmarks = {
        benchmark_id
        for scores in MODEL_SCORES.values()
        for benchmark_id, score in scores.items()
        if score is not None
    }
    return {
        "Top model": rows[0]["Model"] if rows else "-",
        "Best open-source model": open_rows[0]["Model"] if open_rows else "-",
        "Models": str(len(rows)),
        "Active benchmarks": str(len(active_benchmarks)),
        "Latest data source": "GRM Eval - Benchmarks PRD.pdf",
    }


def official_score_for_model(model_name: str) -> dict[str, float | None]:
    return compute_grm_score(MODEL_SCORES.get(model_name, {}))