"""
Scouting Helper Functions

Handles creation of scout opportunities after pack openings
and embed formatting for the scouting feature.
"""

import datetime
import logging
import random

import discord

from api_calls import db_get, db_post
from helpers.utils import int_timestamp, midnight_timestamp
from helpers.discord_utils import get_team_embed
from helpers.constants import IMAGES, PD_SEASON

logger = logging.getLogger("discord_app")

SCOUT_TOKENS_PER_DAY = 2
SCOUT_WINDOW_SECONDS = 1800  # 30 minutes

# Rarity value → display symbol
RARITY_SYMBOLS = {
    8: "\U0001f7e1",  # HoF — yellow
    5: "\U0001f7e3",  # MVP — purple
    3: "\U0001f535",  # All-Star — blue
    2: "\U0001f7e2",  # Starter — green
    1: "\u26aa",  # Reserve — white
    0: "\u26ab",  # Replacement — black
}


async def get_scout_tokens_used(team_id: int) -> int:
    """Return how many scout tokens a team has used today."""
    used_today = await db_get(
        "rewards",
        params=[
            ("name", "Scout Token"),
            ("team_id", team_id),
            ("created_after", midnight_timestamp()),
        ],
    )
    return used_today["count"] if used_today else 0


def _build_card_lines(cards: list[dict]) -> list[tuple[int, str]]:
    """Build a shuffled list of (player_id, display_line) tuples."""
    lines = []
    for card in cards:
        player = card["player"]
        rarity_val = player["rarity"]["value"]
        symbol = RARITY_SYMBOLS.get(rarity_val, "\u26ab")
        lines.append(
            (
                player["player_id"],
                f"{symbol} {player['rarity']['name']} — {player['p_name']}",
            )
        )
    random.shuffle(lines)
    return lines


def build_scout_embed(
    opener_team: dict,
    cards: list[dict],
    card_lines: list[tuple[int, str]] = None,
    expires_unix: int = None,
) -> tuple[discord.Embed, list[tuple[int, str]]]:
    """Build the embed shown above the scout buttons.

    Shows a shuffled list of cards (rarity + player name) so scouters
    know what's in the pack but not which button maps to which card.
    Returns (embed, card_lines) so the view can store the shuffled order.
    """
    embed = get_team_embed(title="Scout Opportunity!", team=opener_team)

    if card_lines is None:
        card_lines = _build_card_lines(cards)

    card_list = "\n".join(line for _, line in card_lines)

    if expires_unix:
        time_line = f"Scout window closes <t:{expires_unix}:R>."
    else:
        time_line = "Scout window closes in **30 minutes**."

    embed.description = (
        f"**{opener_team['lname']}** just opened a pack!\n\n"
        f"**Cards in this pack:**\n{card_list}\n\n"
        f"Pick a card — but which is which?\n"
        f"Costs 1 Scout Token (2 per day, resets at midnight Central).\n"
        f"{time_line}"
    )
    embed.set_footer(
        text=f"Paper Dynasty Season {PD_SEASON} \u2022 One scout per player",
        icon_url=IMAGES["logo"],
    )
    return embed, card_lines


def build_scouted_card_list(
    card_lines: list[tuple[int, str]],
    scouted_cards: dict[int, list[str]],
) -> str:
    """Rebuild the card list marking scouted cards with scouter team names.

    Parameters
    ----------
    card_lines : shuffled list of (player_id, display_line) tuples
    scouted_cards : {player_id: [team_name, ...]} for each claimed card
    """
    result = []
    for player_id, line in card_lines:
        teams = scouted_cards.get(player_id)
        if teams:
            count = len(teams)
            names = ", ".join(f"*{t}*" for t in teams)
            if count == 1:
                result.append(f"{line} \u2014 \u2714\ufe0f {names}")
            else:
                result.append(f"{line} \u2014 \u2714\ufe0f x{count} ({names})")
        else:
            result.append(line)
    return "\n".join(result)


async def create_scout_opportunity(
    pack_cards: list[dict],
    opener_team: dict,
    channel: discord.TextChannel,
    opener_user,
    context,
) -> None:
    """Create a scout opportunity and post the ScoutView to the channel.

    Called after display_cards() completes in open_st_pr_packs().
    Wrapped in try/except so scouting failures never crash pack opening.

    Parameters
    ----------
    pack_cards : list of card dicts from a single pack
    opener_team : team dict for the pack opener
    channel : the #pack-openings channel
    opener_user : discord.Member or discord.User who opened the pack
    context : the command context (Context or Interaction), used to get bot
    """
    from discord_ui.scout_view import ScoutView

    # Only create scout opportunities in the pack-openings channel
    if not channel or channel.name != "pack-openings":
        return

    if not pack_cards:
        return

    now = datetime.datetime.now()
    expires_at = int_timestamp(now + datetime.timedelta(seconds=SCOUT_WINDOW_SECONDS))
    created = int_timestamp(now)

    card_ids = [c["id"] for c in pack_cards]

    try:
        scout_opp = await db_post(
            "scout_opportunities",
            payload={
                "pack_id": pack_cards[0].get("pack_id"),
                "opener_team_id": opener_team["id"],
                "card_ids": card_ids,
                "expires_at": expires_at,
                "created": created,
            },
        )
    except Exception as e:
        logger.error(f"Failed to create scout opportunity: {e}")
        return

    expires_unix = int(
        (now + datetime.timedelta(seconds=SCOUT_WINDOW_SECONDS)).timestamp()
    )
    embed, card_lines = build_scout_embed(
        opener_team, pack_cards, expires_unix=expires_unix
    )

    # Get bot reference from context
    bot = getattr(context, "bot", None) or getattr(context, "client", None)

    view = ScoutView(
        scout_opp_id=scout_opp["id"],
        cards=pack_cards,
        opener_team=opener_team,
        opener_user_id=opener_user.id,
        bot=bot,
        expires_unix=expires_unix,
    )
    view.card_lines = card_lines

    try:
        msg = await channel.send(embed=embed, view=view)
        view.message = msg
    except Exception as e:
        logger.error(f"Failed to post scout opportunity message: {e}")