import json
import logging

import requests as http_requests
from flask import (
    abort,
    make_response,
    render_template,
    jsonify,
    request,
    send_from_directory,
)

from app import APP_VERSION, app, static_v
from app.config import SCOREBOARD_DATA_FILE
from app.games import parse_games
from app.playoff import today_meta
from app.bracket_view import build_bracket_view
from app.playoff_cache import (
    day_n_for_round,
    enrich_game_numbers,
    fetch_series,
    get_bracket,
    parse_series_id,
    refresh_bracket,
)
from app.series_view import build_series_view
from datetime import datetime
from zoneinfo import ZoneInfo

_EASTERN = ZoneInfo("America/New_York")
_logger = logging.getLogger(__name__)


def _fetch_date(date_str):
    url = f"https://api-web.nhle.com/v1/score/{date_str}"
    try:
        resp = http_requests.get(url, timeout=10)
        resp.raise_for_status()
        return resp.json()
    except http_requests.RequestException as e:
        _logger.error("Failed to fetch scores for %s: %s", date_str, e)
        return None


def _max_playoff_round(raw_games):
    max_round = 0
    for g in raw_games or []:
        if g.get("gameType") != 3:
            continue
        r = (g.get("seriesStatus") or {}).get("round") or 0
        if r > max_round:
            max_round = r
    return max_round or None


@app.route("/manifest.json")
def manifest():
    return send_from_directory(app.static_folder, "manifest.json")


@app.route("/sw.js")
def service_worker():
    precache = [
        "/",
        static_v("styles.css"),
        static_v("script.js"),
        static_v("icon-192x192.png"),
        static_v("icon-512x512.png"),
        "/manifest.json",
    ]
    body = render_template("sw.js.j2", app_version=APP_VERSION, precache=precache)
    response = make_response(body)
    response.headers["Content-Type"] = "application/javascript; charset=utf-8"
    response.headers["Service-Worker-Allowed"] = "/"
    response.headers["Cache-Control"] = "no-cache"
    return response


@app.route("/favicon.ico")
def favicon():
    return send_from_directory(
        app.static_folder, "icon-32x32.png", mimetype="image/png"
    )


@app.route("/")
def index():
    return render_template("index.html")


@app.route("/scoreboard")
def get_scoreboard():
    date_param = request.args.get("date")
    today_str = datetime.now(_EASTERN).strftime("%Y-%m-%d")

    if date_param and date_param != today_str:
        try:
            datetime.strptime(date_param, "%Y-%m-%d")
        except ValueError:
            return jsonify({"error": "Invalid date format. Use YYYY-MM-DD."}), 400
        scoreboard_data = _fetch_date(date_param)
        if not scoreboard_data:
            return jsonify(
                {"error": "Failed to retrieve scoreboard data for that date."}
            )
    else:
        try:
            with open(SCOREBOARD_DATA_FILE, "r") as json_file:
                scoreboard_data = json.load(json_file)
        except FileNotFoundError:
            return jsonify(
                {"error": "Failed to retrieve scoreboard data. File not found."}
            )
        except json.JSONDecodeError:
            return jsonify(
                {"error": "Failed to retrieve scoreboard data. Invalid JSON format."}
            )

    if scoreboard_data:
        raw_games = scoreboard_data.get("games", [])
        enrich_game_numbers(raw_games)
        games = parse_games(scoreboard_data)
        max_round = _max_playoff_round(raw_games)
        n = day_n_for_round(max_round) if max_round else None
        meta = today_meta(raw_games, day_n=n)

        pinned = [g for g in games if g.get("Pinned")]
        remaining = [g for g in games if not g.get("Pinned")]

        return jsonify(
            {
                "meta": meta,
                "pinned_games": pinned,
                "live_games": [
                    g
                    for g in remaining
                    if g["Game State"] == "LIVE" and not g["Intermission"]
                ],
                "intermission_games": [
                    g
                    for g in remaining
                    if g["Game State"] == "LIVE" and g["Intermission"]
                ],
                "pre_games": [g for g in remaining if g["Game State"] == "PRE"],
                "final_games": [g for g in remaining if g["Game State"] == "FINAL"],
            }
        )
    else:
        return jsonify({"error": "Failed to retrieve scoreboard data"})


@app.route("/series/<series_id>")
def series_detail(series_id):
    if parse_series_id(series_id) is None:
        abort(404)
    payload = fetch_series(series_id)
    if payload is None:
        abort(404)
    view = build_series_view(series_id, payload)
    return render_template("series.html", series=view)


@app.route("/bracket")
def bracket():
    year = datetime.now(_EASTERN).year
    payload, fetched_at = get_bracket(year)
    if payload is None:
        payload = refresh_bracket(year)
    if payload is None:
        abort(404)
    view = build_bracket_view(year, payload, fetched_at=fetched_at)
    return render_template("bracket.html", bracket=view)