from __future__ import annotations

import json
import unicodedata
from dataclasses import asdict
from pathlib import Path
from typing import Any

import yaml

from racing_reports import vendor_env
from racing_reports.config import DEFAULT_SETTINGS, Settings
from racing_reports.datastore import DataStore
from racing_reports.match_index import MatchIndex
from racing_reports.models import ReportRequest, ReportResult
from racing_reports.reports import block_zscore, ejes, post_match, pre_match, recuperaciones, triple_multitag
from racing_reports.reports.bundle import ReportBundle
from racing_reports.utils import git_commit, slugify, utc_now_iso, write_json

VALID_REPORTS = {"pre_match", "post_match", "block_zscore", "triple_multitag", "triple_centros",
                 "recuperaciones", "ejes_pre", "ejes_post"}


def _norm(text: str) -> str:
    return (
        unicodedata.normalize("NFKD", str(text))
        .encode("ascii", "ignore")
        .decode("ascii")
        .strip()
        .lower()
    )


class ReportRunner:
    def __init__(
        self, datastore: DataStore | None = None, settings: Settings = DEFAULT_SETTINGS
    ):
        self.settings = settings
        self.datastore = datastore or DataStore(settings=settings)
        self.match_index = MatchIndex(self.datastore)

    # ── team id lookup ────────────────────────────────────────────────────
    def _team_ids(self, league: str | None = None, season: str | None = None) -> dict[str, str]:
        # Base: JSON de Segunda (histórico). Se completa/pisa con el mapa nombre→id del
        # dataset del modelo para la liga pedida, así funciona para todas las ligas.
        ids: dict[str, str] = {}
        try:
            ids.update(json.loads(vendor_env.team_ids_path().read_text(encoding="utf-8")))
        except Exception:
            pass
        if league:
            try:
                from racing_reports import web_meta
                ids.update(web_meta.team_ids(league, season or ""))
            except Exception:
                pass
        return ids

    def _resolve_id(self, name: str, team_ids: dict[str, str]) -> str:
        if name in team_ids:
            return team_ids[name]
        target = _norm(name)
        for k, v in team_ids.items():
            if _norm(k) == target:
                return v
        raise ValueError(
            f"No se encontró el ID del equipo {name!r}. "
            f"Equipos disponibles: {', '.join(sorted(team_ids))}"
        )

    # ── orquestación ──────────────────────────────────────────────────────
    def _ordered_reports(self, report_types: list[str]) -> list[str]:
        seen = [r for r in report_types if r in VALID_REPORTS]
        # post_match siempre corre el pre_match del mismo partido antes.
        if "post_match" in seen and "pre_match" not in seen:
            seen = ["pre_match"] + seen
        order = {"pre_match": 0, "block_zscore": 1, "triple_multitag": 2, "triple_centros": 3,
                 "recuperaciones": 4, "post_match": 5, "ejes_pre": 6, "ejes_post": 7}
        return sorted(dict.fromkeys(seen), key=lambda r: order[r])

    def run(self, request: ReportRequest) -> ReportResult:
        report_types = self._ordered_reports(request.report_types)
        if not report_types:
            raise ValueError("No se pidió ningún reporte válido.")

        team_ids = self._team_ids(request.league, request.season)
        home_name = request.home_team
        away_name = request.away_team
        match_date = None

        resolved_match_id = request.match_id
        if request.match_id:
            # Con matchId: resolvemos home/away/fecha desde el dataset bundleado (web_meta),
            # NO del preprocessed (éste todavía no se descargó; prepare_vendor corre después).
            from racing_reports import web_meta

            match = web_meta.find_match(
                request.league, request.season, request.match_id
            )
            home_name = match["home_team"]
            away_name = match["away_team"]
            match_date = match["date"]
        elif {"post_match", "ejes_post"} & set(report_types):
            # Partido reciente sin matchId en el dataset: usamos lo que mandó el front
            # (local/visitante/fecha). El matchId real se resuelve más abajo desde el
            # preprocessed (post_match) o desde los artefactos de ejes (ejes_post).
            home_name = request.home_team
            away_name = request.away_team
            match_date = request.match_date or None

        paths = self.datastore.prepare_vendor(
            report_types, request.league, request.season
        )

        # El head-to-head pro (pre/post) lee team_match_zone_features.parquet, que en
        # el bundle es SOLO Segunda. Para cualquier liga lo reconstruimos del
        # preprocessed antes de generar, así funciona con todas las ligas del modelo.
        zone_build_err: Exception | None = None
        if {"pre_match", "post_match"} & set(report_types):
            try:
                # sync_preprocessed DESCARGA de Azure si no está en cache (require_
                # preprocessed solo mira el cache). El pre-match no lo bajaba antes.
                pre_csv = self.datastore.sync_preprocessed(
                    request.league, request.season
                )
                gen_zones = vendor_env.patch_helper_paths(
                    preprocessed_csv=pre_csv, matches_csv=paths["matches_csv"],
                    league=request.league, season=request.season,
                )
                zpath = vendor_env.DATA_DIR / "team_match_zone_features.parquet"
                if zpath.is_symlink():
                    zpath.unlink()
                gen_zones.build_zone_features_from_preprocessed()
            except Exception as exc:  # se adjunta si el reporte luego falla
                zone_build_err = exc

        output_dir = self.settings.output_dir / slugify(request.league) / str(
            request.season
        ) / slugify(f"{home_name}_vs_{away_name}_{request.match_id or 'libre'}")
        output_dir.mkdir(parents=True, exist_ok=True)

        html_paths: dict[str, Path] = {}
        bundles: dict[str, ReportBundle] = {}
        for report_type in report_types:
            out_path = output_dir / f"{report_type}.html"
            if report_type == "pre_match":
                try:
                    result = pre_match.generate(
                        out_path=out_path,
                        league=request.league,
                        season=request.season,
                        home_name=home_name,
                        away_name=away_name,
                        home_team_id=self._resolve_id(home_name, team_ids),
                        away_team_id=self._resolve_id(away_name, team_ids),
                        matches_csv=paths["matches_csv"],
                        settings=self.settings,
                    )
                except Exception as exc:
                    if zone_build_err is not None:
                        raise ValueError(
                            f"{exc}  ·  Causa probable: no se reconstruyeron las "
                            f"zone-features de {request.league} {request.season} "
                            f"({zone_build_err})"
                        ) from exc
                    raise
            elif report_type == "block_zscore":
                bz = request.settings.get("block_zscore", {})
                result = block_zscore.generate(
                    out_path=out_path,
                    labeled_csv=self.datastore.require_labeled(
                        request.league, request.season
                    ),
                    team_a=bz.get("team_a", home_name),
                    team_b=bz.get("team_b", away_name),
                    date_from=bz.get("date_from"),
                    date_to=bz.get("date_to"),
                    venue_a=bz.get("venue_a", bz.get("venue", "both")),
                    venue_b=bz.get("venue_b", bz.get("venue", "both")),
                )
            elif report_type in ("triple_multitag", "triple_centros", "recuperaciones"):
                flt = request.settings.get("filters", {})
                fn = {
                    "triple_multitag": triple_multitag.generate,
                    "triple_centros": triple_multitag.generate_centros,
                    "recuperaciones": recuperaciones.generate,
                }[report_type]
                result = fn(
                    out_path=out_path,
                    # labeled: trae label_after_rules (bloque Opta+modelo). Cae al
                    # base si no hay etiquetado; el base deriva el bloque de phaseLabel.
                    preprocessed_csv=self.datastore.require_labeled(
                        request.league, request.season
                    ),
                    home_name=home_name,
                    away_name=away_name,
                    date_from=flt.get("date_from"),
                    date_to=flt.get("date_to"),
                    venue_a=flt.get("venue_a", flt.get("venue", "both")),
                    venue_b=flt.get("venue_b", flt.get("venue", "both")),
                )
            elif report_type == "ejes_pre":
                result = ejes.generate_pre(
                    out_path=out_path,
                    league=request.league,
                    season=str(request.season),
                    home_name=home_name,
                    away_name=away_name,
                )
            elif report_type == "ejes_post":
                result = ejes.generate_post(
                    out_path=out_path,
                    league=request.league,
                    season=str(request.season),
                    home_name=home_name,
                    away_name=away_name,
                    match_id=request.match_id or None,
                    match_date=match_date,
                )
            elif report_type == "post_match":
                # Si el partido no traía matchId (reciente, no está en el dataset),
                # lo resolvemos del preprocessed ya descargado por local/visitante/fecha.
                if not resolved_match_id:
                    info = self.match_index.find_by_teams(
                        request.league, request.season, home_name, away_name, match_date
                    )
                    if info is None:
                        raise ValueError(
                            f"No se encontró {home_name} vs {away_name}"
                            + (f" ({match_date})" if match_date else "")
                            + f" en el preprocessed de {request.league} {request.season}."
                        )
                    resolved_match_id = info.match_id
                title = (
                    f"{home_name} vs {away_name}"
                    + (f" — {match_date}" if match_date else "")
                )
                result = post_match.generate(
                    out_path=out_path,
                    preprocessed_csv=self.datastore.require_preprocessed(
                        request.league, request.season
                    ),
                    matches_csv=paths["matches_csv"],
                    league=request.league,
                    season=request.season,
                    match_id=resolved_match_id,
                    home_name=home_name,
                    away_name=away_name,
                    team_ids=team_ids,
                    title=title,
                    match_date=match_date,
                )

            if isinstance(result, ReportBundle):
                bundles[report_type] = result
                html_paths[report_type] = result.html_path
            else:
                html_paths[report_type] = Path(result)

        manifest_path = output_dir / "manifest.json"
        write_json(manifest_path, self._manifest(request, report_types, html_paths, bundles))
        return ReportResult(
            output_dir=output_dir,
            html_paths=html_paths,
            manifest_path=manifest_path,
            bundles=bundles,
        )

    def _manifest(
        self,
        request: ReportRequest,
        report_types: list[str],
        html_paths: dict[str, Path],
        bundles: dict[str, ReportBundle],
    ) -> dict[str, Any]:
        outputs: dict[str, Any] = {}
        for name, path in html_paths.items():
            entry: dict[str, Any] = {"html": str(path)}
            bundle = bundles.get(name)
            if bundle is not None:
                entry["figures"] = [
                    {
                        "name": f.name,
                        "title": f.title,
                        "section": f.section,
                        "png": str(f.png_path),
                        "svg": str(f.svg_path) if f.svg_path else None,
                    }
                    for f in bundle.figures
                ]
                entry["tables"] = [
                    {
                        "name": t.name,
                        "title": t.title,
                        "section": t.section,
                        "csv": str(t.csv_path),
                    }
                    for t in bundle.tables
                ]
                entry["warnings"] = list(bundle.warnings)
                entry["meta"] = bundle.meta
            outputs[name] = entry
        return {
            "generated_at": utc_now_iso(),
            "git_commit": git_commit(Path.cwd()),
            "request": asdict(request),
            "report_types_run": report_types,
            "outputs": outputs,
        }


def request_from_yaml(path: Path) -> ReportRequest:
    payload = yaml.safe_load(path.read_text(encoding="utf-8"))
    settings = _json_safe(payload.get("settings", {}))
    return ReportRequest(
        league=str(payload["league"]),
        season=str(payload["season"]),
        match_id=str(payload.get("match_id", "")),
        home_team=str(payload["home_team"]),
        away_team=str(payload["away_team"]),
        report_types=list(payload.get("report_types", [])),
        settings=dict(settings),
    )


def _json_safe(value):
    if isinstance(value, dict):
        return {k: _json_safe(v) for k, v in value.items()}
    if isinstance(value, list):
        return [_json_safe(v) for v in value]
    if hasattr(value, "isoformat"):
        return value.isoformat()
    return value