# Evolution Status Module
# Displays evolution tier progress for a team's cards

from discord.ext import commands
from discord import app_commands
import discord
from typing import Optional
import logging

from api_calls import db_get
from helpers import get_team_by_owner, is_ephemeral_channel

logger = logging.getLogger("discord_app")

# Tier display names
TIER_NAMES = {
    0: "Unranked",
    1: "Initiate",
    2: "Rising",
    3: "Ascendant",
    4: "Evolved",
}

# Formula shorthands by card_type
FORMULA_SHORTHANDS = {
    "batter": "PA+TB×2",
    "sp": "IP+K",
    "rp": "IP+K",
}


def render_progress_bar(
    current_value: float, next_threshold: float | None, width: int = 10
) -> str:
    """Render a text progress bar.

    Args:
        current_value: Current formula value.
        next_threshold: Threshold for the next tier. None if fully evolved.
        width: Number of characters in the bar.

    Returns:
        A string like '[========--] 120/149' or '[==========] FULLY EVOLVED'.
    """
    if next_threshold is None or next_threshold <= 0:
        return f"[{'=' * width}]  FULLY EVOLVED"

    ratio = min(current_value / next_threshold, 1.0)
    filled = round(ratio * width)
    empty = width - filled
    bar = f"[{'=' * filled}{'-' * empty}]"
    return f"{bar} {int(current_value)}/{int(next_threshold)}"


def format_evo_entry(state: dict) -> str:
    """Format a single evolution card state into a display line.

    Args:
        state: Card state dict from the API with nested track info.

    Returns:
        Formatted string like 'Mike Trout  [========--] 120/149  (PA+TB×2)  T1 → T2'
    """
    track = state.get("track", {})
    card_type = track.get("card_type", "batter")
    formula = FORMULA_SHORTHANDS.get(card_type, "???")
    current_tier = state.get("current_tier", 0)
    current_value = state.get("current_value", 0.0)
    next_threshold = state.get("next_threshold")
    fully_evolved = state.get("fully_evolved", False)

    bar = render_progress_bar(current_value, next_threshold)

    if fully_evolved:
        tier_label = f"T4 — {TIER_NAMES[4]}"
    else:
        next_tier = current_tier + 1
        tier_label = (
            f"{TIER_NAMES.get(current_tier, '?')} → {TIER_NAMES.get(next_tier, '?')}"
        )

    return f"{bar}  ({formula})  {tier_label}"


def is_close_to_tierup(state: dict, threshold_pct: float = 0.80) -> bool:
    """Check if a card is close to its next tier-up.

    Args:
        state: Card state dict from the API.
        threshold_pct: Fraction of next_threshold that counts as "close".

    Returns:
        True if current_value >= threshold_pct * next_threshold.
    """
    next_threshold = state.get("next_threshold")
    if next_threshold is None or next_threshold <= 0:
        return False
    current_value = state.get("current_value", 0.0)
    return current_value >= threshold_pct * next_threshold


class Evolution(commands.Cog):
    """Evolution tier progress for Paper Dynasty cards."""

    def __init__(self, bot):
        self.bot = bot

    evo_group = app_commands.Group(name="evo", description="Evolution commands")

    @evo_group.command(name="status", description="View your team's evolution progress")
    @app_commands.describe(
        type="Filter by card type (batter, sp, rp)",
        tier="Filter by minimum tier (0-4)",
        progress="Show only cards close to tier-up (type 'close')",
        page="Page number (default: 1)",
    )
    async def evo_status(
        self,
        interaction: discord.Interaction,
        type: Optional[str] = None,
        tier: Optional[int] = None,
        progress: Optional[str] = None,
        page: int = 1,
    ):
        await interaction.response.defer(
            ephemeral=is_ephemeral_channel(interaction.channel)
        )

        # Look up the user's team
        team = await get_team_by_owner(interaction.user.id)
        if not team:
            await interaction.followup.send(
                "You don't have a team registered. Use `/register` first.",
                ephemeral=True,
            )
            return

        team_id = team.get("team_id") or team.get("id")

        # Build query params
        params = [("page", page), ("per_page", 10)]
        if type:
            params.append(("card_type", type))
        if tier is not None:
            params.append(("tier", tier))

        try:
            result = await db_get(
                f"teams/{team_id}/evolutions",
                params=params,
                none_okay=True,
            )
        except Exception:
            logger.warning(
                f"Failed to fetch evolution data for team {team_id}",
                exc_info=True,
            )
            await interaction.followup.send(
                "Could not fetch evolution data. Please try again later.",
                ephemeral=True,
            )
            return

        if not result or not result.get("items"):
            await interaction.followup.send(
                "No evolution cards found for your team.",
                ephemeral=True,
            )
            return

        items = result["items"]
        total_count = result.get("count", len(items))

        # Apply "close" filter client-side
        if progress and progress.lower() == "close":
            items = [s for s in items if is_close_to_tierup(s)]
            if not items:
                await interaction.followup.send(
                    "No cards are close to a tier-up right now.",
                    ephemeral=True,
                )
                return

        # Build embed
        embed = discord.Embed(
            title=f"Evolution Progress — {team.get('lname', 'Your Team')}",
            color=discord.Color.purple(),
        )

        lines = []
        for state in items:
            # Try to get player name from the state
            player_name = state.get(
                "player_name", f"Player #{state.get('player_id', '?')}"
            )
            entry = format_evo_entry(state)
            lines.append(f"**{player_name}**\n{entry}")

        embed.description = "\n\n".join(lines) if lines else "No evolution data."

        # Pagination footer
        per_page = 10
        total_pages = max(1, (total_count + per_page - 1) // per_page)
        embed.set_footer(text=f"Page {page}/{total_pages} • {total_count} total cards")

        await interaction.followup.send(embed=embed)