#!/usr/bin/env python3
from __future__ import annotations

import html
import re

import discord


def is_missing(value: str | None) -> bool:
    text = (value or "").strip().lower()
    return text in {"", "n/a", "none", "null"}


def fit_embed_value(text: str, max_len: int = 1000) -> str:
    value = (text or "").strip()
    if is_missing(value):
        value = "Unbekannt"
    if len(value) <= max_len:
        return value
    return value[: max_len - 3] + "..."


def fit_embed_description(text: str, max_len: int = 3800) -> str:
    value = (text or "").strip()
    if len(value) <= max_len:
        return value
    return value[: max_len - 3] + "..."


def format_tag_badges(tags_text: str) -> str:
    if is_missing(tags_text):
        return "Unbekannt"
    parts = [part.strip() for part in tags_text.split(",") if part.strip()]
    if not parts:
        return "Unbekannt"
    return " ".join(f"`{part}`" for part in parts)


def format_single_badge(text: str) -> str:
    if is_missing(text):
        return "Unbekannt"
    return f"`{fit_embed_value(text, max_len=200)}`"


def compact_text(text: str) -> str:
    raw = text or ""
    raw = re.sub(r"<\s*br\s*/?\s*>", " ", raw, flags=re.IGNORECASE)
    raw = re.sub(r"</\s*p\s*>", " ", raw, flags=re.IGNORECASE)
    raw = re.sub(r"<[^>]+>", "", raw)
    raw = html.unescape(raw)
    return " ".join(raw.replace("\n", " ").split())


def add_line(lines: list[str], label: str, value: str) -> None:
    if is_missing(value):
        return
    lines.append(f"**{label}:** {fit_embed_value(value)}")


def make_links_view(anilist_url: str) -> discord.ui.View | None:
    if is_missing(anilist_url):
        return None

    view = discord.ui.View(timeout=None)
    view.add_item(discord.ui.Button(label="Zum Anime", style=discord.ButtonStyle.link, url=anilist_url))
    return view


def build_movie_embed(item: dict, index: int) -> discord.Embed:
    title = fit_embed_value(
        str(item.get("title_schedule_english") or item.get("title_english_anilist") or item.get("title", "")),
        max_len=200,
    )
    anilist_url = str(item.get("anilist_url", "")).strip()
    embed = discord.Embed(
        title=title,
        url=anilist_url if not is_missing(anilist_url) else None,
        color=discord.Color.from_rgb(30, 144, 255),
    )

    tags_badges = format_tag_badges(str(item.get("tags", "")))
    genres_badges = format_tag_badges(str(item.get("genres", "")))
    romaji_badge = format_single_badge(str(item.get("title_romaji", "")))
    native_badge = format_single_badge(str(item.get("title_native", "")))
    description_text = compact_text(str(item.get("description", "")))

    lines: list[str] = []
    add_line(lines, "Anime Typ", str(item.get("format", "")))
    add_line(lines, "Genres", genres_badges)
    add_line(lines, "Tags", tags_badges)
    add_line(lines, "Release", str(item.get("release", "")))
    add_line(lines, "Studios", str(item.get("studio", "")))
    add_line(lines, "Romaji", romaji_badge)
    add_line(lines, "Nativ", native_badge)
    add_line(lines, "Beschreibung", description_text)
    embed.description = fit_embed_description("\n".join(lines) if lines else "Keine Details verfuegbar")

    cover = (item.get("cover_image") or "").strip()
    if cover:
        embed.set_image(url=cover)

    embed.set_footer(
        text=(
            "Daten: AniList, AnimeSchedule, TMDB | "
            "This product uses the TMDB API but is not endorsed or certified by TMDB. "
            f"| Eintrag #{index}"
        )
    )
    return embed