from flask import Blueprint, render_template, request, send_file, jsonify
import math
from helpers.db import db_get_videos, db_get_video, db_get_recent
from helpers.favorites import mark_favorites, db_get_favorites, db_get_fav_set, db_get_favorite_users
from helpers.cache import build_cache
from config import VIDEOS_PER_PAGE, DASHBOARD_PER_PAGE, get_local_db_connection
from datetime import date, datetime, timedelta
import requests

web = Blueprint("web", __name__)

def _get_recording_streamers() -> set[str]:
    try:
        resp = requests.get("http://127.0.0.1:5000/api/get_recording/")
        resp.raise_for_status()
        return resp.json()
    except Exception:
        return set()

def _parse_dates(timeframe: str, start_str: str | None, end_str: str | None):
    """Return (start, end) as date objects or (None, None). End inclusive by day."""
    today = date.today()
    if timeframe == "week":
        return (today - timedelta(days=6)), today
    if timeframe == "month":
        return (today - timedelta(days=29)), today
    if timeframe == "year":
        return (today - timedelta(days=364)), today
    if timeframe == "custom":
        try:
            s = datetime.strptime(start_str, "%Y-%m-%d").date() if start_str else None
            e = datetime.strptime(end_str, "%Y-%m-%d").date() if end_str else None
            if s and e and s > e: s, e = e, s
            return s, e
        except ValueError:
            return None, None
    return None, None

@web.route("/")
def dashboard():
    # ---- read filters ----
    query = request.args.get("q", "").lower().strip()
    sort = request.args.get("sort", "total_size")
    dir_ = request.args.get("dir", "desc")
    reverse = (dir_ == "desc")

    timeframe = request.args.get("timeframe", "all")
    start_str = request.args.get("start")
    end_str = request.args.get("end")

    start, end = _parse_dates(timeframe, start_str, end_str)

    # ---- build cache over timeframe ----
    cache = build_cache(start=start, end=end)
    items = list(cache["storage_usage"].items())

    # ---- search ----
    if query:
        items = [e for e in items if query in e[0].split("::")[0].lower()]

    # ---- sort keys ----
    def k_user(x): return x[0].split("::")[0].lower()
    def k_platform(x): return x[0].split("::")[1].lower()
    def k_total(x): return x[1]["total_size"]
    def k_count(x): return x[1]["video_count"]
    def k_avg(x): return cache["avg_sizes"][x[0]]
    def k_last(x):
        v = x[1].get("last_online")
        # put None at the end when descending
        return v if v is not None else (float("-inf") if not reverse else float("inf"))

    key_map = {
        "user": k_user,
        "platform": k_platform,
        "total_size": k_total,
        "video_count": k_count,
        "avg_size": k_avg,
        "last_online": k_last,   # <— new
    }
    base_key = key_map.get(sort, k_total)

    # ---- get recording list → two sets: online + recording_offline ----
    online_usernames: set[str] = set()
    recording_offline_usernames: set[str] = set()

    def user_of(item) -> str:
        return item[0].split("::")[0]
    def is_online(item) -> bool:
        return user_of(item).lower() in online_usernames
    def is_recording_offline(item) -> bool:
        u = user_of(item).lower()
        return (u in recording_offline_usernames) and (u not in online_usernames)

    try:
        rec_list = _get_recording_streamers()
        for s in rec_list or []:
            u = (s.get("username") or "").lower()
            if not u:
                continue
            if s.get("is_online"):
                online_usernames.add(u)
            else:
                recording_offline_usernames.add(u)
    except Exception:
        pass

    # ---- sort with optional grouping ----
    online_items            = [x for x in items if is_online(x)]
    recording_offline_items = [x for x in items if is_recording_offline(x)]
    the_rest                = [x for x in items if (x not in online_items) and (x not in recording_offline_items)]

    online_items.sort(key=base_key, reverse=reverse)
    recording_offline_items.sort(key=base_key, reverse=reverse)
    the_rest.sort(key=base_key, reverse=reverse)
    items = online_items + recording_offline_items + the_rest

    # ---- paginate ----
    page = max(1, int(request.args.get("page", 1)))
    total_pages = max(1, math.ceil(len(items) / DASHBOARD_PER_PAGE))
    start_idx = (page - 1) * DASHBOARD_PER_PAGE
    paginated = items[start_idx:start_idx + DASHBOARD_PER_PAGE]

    favorite_users = db_get_favorite_users()

    return render_template(
        "main.html",
        storage_usage=paginated,
        avg_sizes=cache["avg_sizes"],
        page=page,
        total_pages=total_pages,
        query=query,
        sort=sort,
        dir=dir_,
        timeframe=timeframe,
        start_date=start_str,
        end_date=end_str,
        online_set=online_usernames,
        recording_offline_set=recording_offline_usernames,
        favorite_users=favorite_users,
    )

@web.route("/user/<username>")
def user_page(username):
    videos = db_get_videos(username=username)
    page = max(1, int(request.args.get("page", 1)))
    total_pages = max(1, math.ceil(len(videos) / VIDEOS_PER_PAGE))
    start = (page - 1) * VIDEOS_PER_PAGE
    paginated = videos[start:start + VIDEOS_PER_PAGE]
    mark_favorites(paginated)

    return render_template(
        "user_page.html",
        username=username,
        videos=paginated,
        page=page,
        total_pages=total_pages
    )

@web.route("/video/stream/<video_id>")
def stream_video(video_id):
    video = db_get_video(video_id)
    if video:
        return send_file(video["filepath"], mimetype="video/mp4")
    return "Video not found", 404

@web.route("/video/<video_id>")
def view_video(video_id):
    video = db_get_video(video_id)
    if video:
        video["is_favorite"] = (video["video_id"] in db_get_fav_set())
        return render_template("video_view.html", video=video)
    return "Video not found", 404

@web.route("/recent")
def recent():
    page = max(1, int(request.args.get("page", 1)))
    videos, total = db_get_recent(page, VIDEOS_PER_PAGE)
    total_pages = max(1, math.ceil(total / VIDEOS_PER_PAGE))
    mark_favorites(videos)

    return render_template(
        "recent.html",
        videos=videos,
        page=page,
        total_pages=total_pages
    )

@web.route("/favorites")
def favorites_page():
    page = max(1, int(request.args.get("page", 1)))
    videos, total = db_get_favorites(page, VIDEOS_PER_PAGE)
    total_pages = max(1, math.ceil(total / VIDEOS_PER_PAGE))
    mark_favorites(videos)

    return render_template(
        "favorites.html",
        videos=videos,
        page=page,
        total_pages=total_pages
    )
    
@web.route("/users")
def users():
    # ---- filters ----
    q         = (request.args.get("q") or "").lower().strip()
    sort      = request.args.get("sort", "total_size")  # user|site|total_size|video_count
    dir_      = request.args.get("dir", "desc")
    reverse   = (dir_ == "desc")
    timeframe = request.args.get("timeframe", "all")
    start_str = request.args.get("start")
    end_str   = request.args.get("end")
    show_online_first = request.args.get("online") == "1"

    start, end = _parse_dates(timeframe, start_str, end_str)

    # ---- WHERE ----
    where = ["1=1"]
    params = {}
    if q:
        where.append("LOWER(username) LIKE %(q)s")
        params["q"] = f"%{q}%"
    if start:
        where.append("created_at >= %(start)s")
        params["start"] = start
    if end:
        where.append("created_at < %(end)s")
        params["end"] = end
    where_sql = " AND ".join(where)

    # ---- ORDER BY (use computed GB alias) ----
    sort_map = {
        "user":        "username",
        "site":        "site",
        "total_size":  "total_gb",     # <- sort by GB, not raw MB sum
        "video_count": "video_count",
    }
    order_col = sort_map.get(sort, "total_gb")
    order_dir = "DESC" if reverse else "ASC"

    # ---- pagination ----
    page = max(1, int(request.args.get("page", 1)))
    per_page = 100
    offset = (page - 1) * per_page

    # ---- count distinct (username, site) for pager ----
    count_sql = f"""
        SELECT COUNT(*) AS n FROM (
            SELECT 1
            FROM videos
            WHERE {where_sql}
            GROUP BY username, site
        ) t;
    """

    # size is in **MB**, convert to GB:
    #   1 GiB = 1024 MB → divide by 1024.0
    #   (If you really want decimal GB, change 1024.0 to 1000.0)
    agg_sql = f"""
        SELECT
            username,
            site,
            COUNT(*)                                        AS video_count,
            SUM(size)                                       AS total_mb,
            AVG(size)                                       AS avg_mb,
            (SUM(size)::numeric / 1024.0)                   AS total_gb,
            (AVG(size)::numeric / 1024.0)                   AS avg_gb
        FROM videos
        WHERE {where_sql}
        GROUP BY username, site
        ORDER BY {order_col} {order_dir}
        LIMIT %(limit)s OFFSET %(offset)s;
    """
    params.update({"limit": per_page, "offset": offset})

    conn, cur = get_local_db_connection()
    cur = conn.cursor()

    cur.execute(count_sql, params)
    total_rows = cur.fetchone()[0] or 0
    total_pages = max(1, math.ceil(total_rows / per_page))

    cur.execute(agg_sql, params)
    rows = cur.fetchall()
    # rows: (username, site, video_count, total_mb, avg_mb, total_gb, avg_gb)

    # ---- online/recording status sets (optional) ----
    online_usernames: set[str] = set()
    recording_offline_usernames: set[str] = set()
    if show_online_first:
        try:
            rec_list = _get_recording_streamers()
            for s in rec_list or []:
                u = (s.get("username") or "").lower()
                if not u:
                    continue
                if s.get("is_online"):
                    online_usernames.add(u)
                else:
                    recording_offline_usernames.add(u)
        except Exception:
            pass

    # ---- thumbnail candidates per (user, site) ----
    tcur = conn.cursor()
    thumb_sql = """
        SELECT thumbnail
        FROM videos
        WHERE username = %(u)s
          AND site = %(s)s
          AND thumbnail IS NOT NULL
          AND thumbnail <> ''
        ORDER BY created_at DESC
        LIMIT 3;
    """

    cards = []
    for (username, site, video_count, total_mb, avg_mb, total_gb, avg_gb) in rows:
        # fetch up to 3 recent thumbnails
        thumb_urls = []
        try:
            tcur.execute(thumb_sql, {"u": username, "s": site})
            thumb_urls = [r[0] for r in tcur.fetchall() if r and r[0]]
        except Exception:
            pass

        total_gb_val = float(total_gb or 0.0)
        avg_gb_val   = float(avg_gb or 0.0)

        uname_low = (username or "").lower()
        cards.append({
            "user": username,
            "site": site,
            "video_count": int(video_count),

            # numeric
            "total_size": total_gb_val,
            "avg_size":   avg_gb_val,

            # preformatted strings for display
            "total_size_display": f"{total_gb_val:.2f}",
            "avg_size_display":   f"{avg_gb_val:.2f}",

            "thumb_urls": thumb_urls,
            "is_online": uname_low in online_usernames,
            "is_recording_offline": (uname_low in recording_offline_usernames) and (uname_low not in online_usernames),
        })

    if show_online_first:
        online_cards    = [c for c in cards if c["is_online"]]
        rec_off_cards   = [c for c in cards if c["is_recording_offline"] and not c["is_online"]]
        the_rest        = [c for c in cards if (c not in online_cards) and (c not in rec_off_cards)]

        key_map = {
            "user":        lambda c: c["user"].lower(),
            "site":        lambda c: c["site"].lower(),
            "total_size":  lambda c: c["total_size"],
            "video_count": lambda c: c["video_count"],
        }
        k = key_map.get(sort, key_map["total_size"])
        online_cards.sort(key=k, reverse=reverse)
        rec_off_cards.sort(key=k, reverse=reverse)
        the_rest.sort(key=k, reverse=reverse)
        cards = online_cards + rec_off_cards + the_rest

    return render_template(
        "users.html",
        cards=cards,
        page=page,
        total_pages=total_pages,
        query=q,
        sort=sort,
        dir=dir_,
        timeframe=timeframe,
        start_date=start_str,
        end_date=end_str,
        online="1" if show_online_first else "0",
    )