import os
import sys
import glob
import re
import asyncio
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

from fastapi import FastAPI, HTTPException, status
from fastapi.staticfiles import StaticFiles
from fastapi.templating import Jinja2Templates
from fastapi import Request
from fastapi.responses import RedirectResponse
from pydantic import BaseModel
from dotenv import load_dotenv

from passlib.hash import pbkdf2_sha256 as hasher
from botdiscord.config import load_config, get_web_config, get_libretranslate_url, get_db_type

# Asegurar que las variables de entorno se carguen correctamente
load_dotenv()

load_config() # Cargamos configuración inmediatamente

from botdiscord.database import (
    init_db, get_ui_translation, save_ui_translation,
    get_admins, get_admin_by_username, add_admin, delete_admin,
    _normalize_text
)
init_db() # Aseguramos que las tablas existan antes de que FastAPI atienda peticiones
from botdiscord.translate import translate_text

app = FastAPI(title="Panel de Configuración - Bots de Traducción")

SCRIPT_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))

templates = Jinja2Templates(directory=os.path.join(SCRIPT_DIR, "panel", "templates"))

from utils.logger import panel_logger as log
from utils.cache import cache_get, cache_set, cache_increment

# Caché de memoria RAM como fallback si Redis no está disponible
_ui_memory_cache = {}

# Filtro de traducción para Jinja2 (usa Redis → RAM → DB → LibreTranslate en cascada)
def translate_filter(text, lang="es"):
    if lang == "es" or not text:
        return text
    
    # NORMALIZACIÓN inmediata
    text = _normalize_text(text)
    if not text: return ""

    cache_key = f"ui:{lang}:{text}"
    _BAD = "mantenimiento"  # Patron de respuesta de error a ignorar
    
    # 1. Redis (compartido y persistente entre reinicios)
    redis_val = cache_get(cache_key)
    if redis_val and _BAD not in redis_val:
        _ui_memory_cache[cache_key] = redis_val
        return redis_val
    elif redis_val and _BAD in redis_val:
        # Valor contaminado: eliminarlo del caché
        from utils.cache import cache_delete
        cache_delete(cache_key)
    
    # 2. RAM local (ultra rápida, temporal)
    ram_val = _ui_memory_cache.get(cache_key)
    if ram_val and _BAD not in ram_val:
        return ram_val
    elif cache_key in _ui_memory_cache:
        del _ui_memory_cache[cache_key]
    
    # 3. Base de datos MySQL
    cached = get_ui_translation(text, lang)
    if cached and _BAD not in cached:
        _ui_memory_cache[cache_key] = cached
        cache_set(cache_key, cached, ttl=604800)  # 7 días
        return cached
    
    # 4. LibreTranslate (sincrónico, solo si no está en ningún caché)
    from botdiscord.translate import translate_text_sync
    translated = translate_text_sync(text, lang)
    
    if translated and translated != text and _BAD not in translated:
        save_ui_translation(text, lang, translated)
        _ui_memory_cache[cache_key] = translated
        cache_set(cache_key, translated, ttl=604800)  # 7 días
        return translated
        
    return text  # Fallback: devolver el texto original si todo falla

templates.env.filters["translate"] = translate_filter

_warmed_languages = set()

async def pre_warm_ui_translations(lang: str):
    if lang == "es" or lang in _warmed_languages:
        return
        
    _warmed_languages.add(lang)
    print(f"[Panel] Pre-calentando traducciones para idioma UI: {lang}...")
    
    strings_to_translate = set()
    for f in glob.glob(os.path.join(os.path.dirname(__file__), "templates", "*.html")):
        try:
            with open(f, "r", encoding="utf-8") as fd:
                content = fd.read()
                strings_to_translate.update(re.findall(r'\"([^\"]+)\"\s*\|\s*translate', content))
                strings_to_translate.update(re.findall(r'\'([^\']+)\'\s*\|\s*translate', content))
        except Exception:
            pass
            
    missing_strings = []
    for text in strings_to_translate:
        norm_text = _normalize_text(text)
        if not norm_text: continue
        
        cache_key = f"{lang}:{norm_text}"
        if cache_key in _ui_memory_cache: continue
        
        cached = get_ui_translation(norm_text, lang)
        if cached:
            _ui_memory_cache[cache_key] = cached
        else:
            missing_strings.append(norm_text)
            
    if not missing_strings:
        print(f"[Panel] Pre-calentamiento completo: 0 cadenas faltantes para {lang}")
        return
        
    print(f"[Panel] Falta traducir {len(missing_strings)} cadenas UI al {lang}. Empezando concurrencia...")
    
    from botdiscord.translate import translate_text
    
    async def _fetch_and_save(text):
        translated = await translate_text(text, lang)
        if translated and translated != text:
            save_ui_translation(text, lang, translated)
            _ui_memory_cache[f"{lang}:{text}"] = translated
            
    tasks = [_fetch_and_save(t) for t in missing_strings]
    await asyncio.gather(*tasks)
    print(f"[Panel] Pre-calentamiento terminado para {lang}.")

@app.middleware("http")
async def translation_pre_warm_middleware(request: Request, call_next):
    # Detectamos el idioma que va a usar la página para asegurarnos de que esté cargado
    if request.url.path.startswith("/static") or request.url.path.startswith("/api"):
        return await call_next(request)
        
    lang = request.cookies.get("panel_lang")
    if not lang:
        accept_lang = request.headers.get("accept-language", "es")
        lang = accept_lang.split(",")[0].split("-")[0]
    
    if lang and len(lang) == 2:
        await pre_warm_ui_translations(lang)
        
    return await call_next(request)

@app.get("/set-lang/{lang}")
async def set_lang(lang: str, request: Request):
    # Validamos que el idioma sea de 2 letras
    if len(lang) != 2:
        return RedirectResponse(url="/dashboard")
        
    # Ejecutamos el calentamiento asíncrono para que la redirección sea instantánea
    await pre_warm_ui_translations(lang)
        
    response = RedirectResponse(url=request.headers.get("referer", "/dashboard"))
    response.set_cookie(key="panel_lang", value=lang, max_age=31536000) # 1 año
    return response

def get_panel_lang(request: Request):
    lang = request.cookies.get("panel_lang")
    if not lang:
        accept_lang = request.headers.get("accept-language", "es")
        lang = accept_lang.split(",")[0].split("-")[0]
    return lang

class LoginForm(BaseModel):
    username: str
    password: str

def get_config():
    cfg = load_config()
    return {
        "discord": {"token": cfg.get("discord", {}).get("token", "")},
        "telegram": {"token": cfg.get("telegram", {}).get("token", "")},
        "libretranslate": {"url": cfg.get("libretranslate", {}).get("url", "")},
        "web": cfg.get("web", {}),
        "database": cfg.get("database", {}),
        "languages": cfg.get("languages", {})
    }

def verify_admin(username: str, password: str) -> bool:
    # 1. Primero intentamos con el SuperAdmin del .env (backup)
    web_config = get_web_config()
    if username == web_config.get("admin_username", "") and \
       password == web_config.get("admin_password", ""):
        return True
    
    # 2. Si no es el SuperAdmin, buscamos en la base de datos MySQL
    try:
        admin = get_admin_by_username(username)
        if admin and hasher.verify(password, admin['password_hash']):
            return True
    except Exception as e:
        print(f"Error verifying admin: {e}")
        
    return False

@app.get("/")
async def root(request: Request):
    return templates.TemplateResponse("index.html", {"request": request})

@app.get("/login")
async def login_page(request: Request):
    return templates.TemplateResponse("login.html", {"request": request})

@app.post("/login")
async def login(request: Request):
    form = await request.form()
    username = form.get("username", "")
    password = form.get("password", "")
    
    if verify_admin(username, password):
        response = RedirectResponse(url="/dashboard", status_code=status.HTTP_303_SEE_OTHER)
        response.set_cookie(key="auth", value="ok", httponly=True)
        response.set_cookie(key="username", value=username, httponly=True)
        return response
    
    return templates.TemplateResponse("login.html", {
        "request": request,
        "error": "Credenciales incorrectas"
    })

@app.get("/dashboard")
async def dashboard(request: Request):
    if request.cookies.get("auth") != "ok":
        return RedirectResponse(url="/login")
    
    username = request.cookies.get("username", "")
    config = get_config()
    return templates.TemplateResponse("dashboard.html", {
        "request": request,
        "config": config,
        "username": username
    })

@app.get("/config")
async def config_page(request: Request):
    if request.cookies.get("auth") != "ok":
        return RedirectResponse(url="/login")
    
    username = request.cookies.get("username", "")
    config = get_config()
    return templates.TemplateResponse("config.html", {
        "request": request,
        "config": config,
        "username": username
    })

@app.get("/languages")
async def languages_page(request: Request):
    if request.cookies.get("auth") != "ok":
        return RedirectResponse(url="/login")
    
    from botdiscord.database import get_available_languages, get_bot_languages
    
    available = get_available_languages()
    discord_langs = get_bot_languages("discord")
    telegram_langs = get_bot_languages("telegram")
    
    return templates.TemplateResponse("languages.html", {
        "request": request,
        "available_languages": available,
        "discord_languages": discord_langs,
        "telegram_languages": telegram_langs,
        "libretranslate_url": get_libretranslate_url()
    })

@app.post("/languages/sync")
async def sync_languages(request: Request):
    if request.cookies.get("auth") != "ok":
        raise HTTPException(status_code=401)
    
    import aiohttp
    url = get_libretranslate_url()
    
    if not url:
        return RedirectResponse(url="/languages?error=1", status_code=status.HTTP_303_SEE_OTHER)
    
    base_url = url.rstrip("/translate").rstrip("/translate/").rstrip("/")
    if base_url.endswith("/translate"):
        base_url = base_url[:-10]
    base_url = base_url.rstrip("/")
    
    try:
        async with aiohttp.ClientSession() as session:
            async with session.get(f"{base_url}/languages", timeout=aiohttp.ClientTimeout(total=10)) as resp:
                if resp.status == 200:
                    languages = await resp.json()
                    from botdiscord.database import get_available_languages, set_available_languages
                    
                    existing = {lang["code"]: lang.get("flag", "") for lang in get_available_languages()}
                    
                    for lang in languages:
                        lang["flag"] = existing.get(lang["code"], "")
                    
                    set_available_languages(languages)
                    return RedirectResponse(url="/languages?synced=1", status_code=status.HTTP_303_SEE_OTHER)
                else:
                    return RedirectResponse(url="/languages?error=1", status_code=status.HTTP_303_SEE_OTHER)
    except Exception as e:
        print(f"Error syncing languages: {e}")
        return RedirectResponse(url="/languages?error=1", status_code=status.HTTP_303_SEE_OTHER)

@app.post("/languages/bot")
async def update_bot_languages(request: Request):
    if request.cookies.get("auth") != "ok":
        raise HTTPException(status_code=401)
    
    form = await request.form()
    bot_type = form.get("bot_type", "discord")
    lang_codes = form.getlist("lang_codes")
    
    from botdiscord.database import set_bot_languages
    set_bot_languages(bot_type, lang_codes)
    
    return RedirectResponse(url="/languages?success=1", status_code=status.HTTP_303_SEE_OTHER)

@app.post("/languages/flags")
async def update_language_flags(request: Request):
    if request.cookies.get("auth") != "ok":
        raise HTTPException(status_code=401)
    
    from botdiscord.database import get_available_languages, set_available_languages
    
    available = get_available_languages()
    form = await request.form()
    
    for lang in available:
        flag_key = f"flag_{lang['code']}"
        lang['flag'] = form.get(flag_key, "")
    
    set_available_languages(available)
    
    return RedirectResponse(url="/languages?success=1", status_code=status.HTTP_303_SEE_OTHER)

@app.get("/logout")
async def logout():
    response = RedirectResponse(url="/login", status_code=status.HTTP_303_SEE_OTHER)
    response.delete_cookie("auth")
    response.delete_cookie("username")
    return response

@app.get("/admins")
async def admins_page(request: Request):
    if request.cookies.get("auth") != "ok":
        return RedirectResponse(url="/login")
    
    admins = get_admins()
    return templates.TemplateResponse("admins.html", {
        "request": request,
        "admins": admins
    })

@app.post("/admins/add")
async def add_admin_post(request: Request):
    if request.cookies.get("auth") != "ok":
        raise HTTPException(status_code=401)
    
    form = await request.form()
    username = form.get("username", "")
    password = form.get("password", "")
    
    if not username or not password:
        return RedirectResponse(url="/admins?error=missing_fields", status_code=status.HTTP_303_SEE_OTHER)

    try:
        password_hash = hasher.hash(password)
        add_admin(username, password_hash)
        return RedirectResponse(url="/admins?success=1", status_code=status.HTTP_303_SEE_OTHER)
    except Exception as e:
        print(f"CRITICAL ERROR adding admin: {e}")
        # Redirigimos con error a la misma página
        return RedirectResponse(url="/admins?error=" + str(e), status_code=status.HTTP_303_SEE_OTHER)

@app.post("/admins/delete")
async def delete_admin_post(request: Request):
    if request.cookies.get("auth") != "ok":
        raise HTTPException(status_code=401)
    
    form = await request.form()
    admin_id = form.get("admin_id")
    if admin_id:
        try:
            delete_admin(int(admin_id))
        except Exception as e:
            print(f"Error deleting admin: {e}")
        
    return RedirectResponse(url="/admins", status_code=status.HTTP_303_SEE_OTHER)

@app.post("/admins/update")
async def update_admin_post(request: Request):
    if request.cookies.get("auth") != "ok":
        raise HTTPException(status_code=401)
    
    form = await request.form()
    admin_id = form.get("admin_id")
    new_password = form.get("new_password")
    
    if admin_id and new_password:
        from botdiscord.database import update_admin_password
        password_hash = hasher.hash(new_password)
        try:
            update_admin_password(int(admin_id), password_hash)
        except Exception as e:
            print(f"Error updating admin password: {e}")
            
    return RedirectResponse(url="/admins?success=1", status_code=status.HTTP_303_SEE_OTHER)

@app.get("/welcome")
async def welcome_page(request: Request):
    if request.cookies.get("auth") != "ok":
        return RedirectResponse(url="/login")
    
    from botdiscord.database import get_all_welcome_configs
    
    configs = get_all_welcome_configs()
    config_dict = {c['guild_id']: c for c in configs} if configs else {}
    
    selected_guild = request.query_params.get("guild")
    selected_cfg = None
    if selected_guild and selected_guild.isdigit():
        selected_cfg = config_dict.get(int(selected_guild))
    
    success = request.query_params.get("success") == "1"
    error = request.query_params.get("error") == "1"
    
    return templates.TemplateResponse("welcome.html", {
        "request": request,
        "configs": config_dict,
        "config": config_dict,
        "selected_guild": int(selected_guild) if selected_guild and selected_guild.isdigit() else None,
        "selected_cfg": selected_cfg,
        "success": success,
        "error": error,
        "new_form": request.query_params.get("new") == "1"
    })

@app.post("/welcome/save")
async def save_welcome(request: Request):
    if request.cookies.get("auth") != "ok":
        raise HTTPException(status_code=401)
    
    form = await request.form()
    guild_id = form.get("guild_id")
    channel_id = form.get("channel_id")
    message_content = form.get("message_content")
    enabled = form.get("enabled") == "1"
    
    if not guild_id or not channel_id or not message_content:
        return RedirectResponse(url="/welcome?error=1", status_code=status.HTTP_303_SEE_OTHER)
    
    try:
        from botdiscord.database import save_welcome_message
        save_welcome_message(
            int(guild_id),
            int(channel_id),
            message_content,
            enabled
        )
        return RedirectResponse(url="/welcome?success=1", status_code=status.HTTP_303_SEE_OTHER)
    except Exception as e:
        print(f"Error saving welcome message: {e}")
        return RedirectResponse(url="/welcome?error=1", status_code=status.HTTP_303_SEE_OTHER)

@app.post("/welcome/delete")
async def delete_welcome(request: Request):
    if request.cookies.get("auth") != "ok":
        raise HTTPException(status_code=401)
    
    form = await request.form()
    guild_id = form.get("guild_id")
    
    if guild_id:
        try:
            from botdiscord.database import delete_welcome_message
            delete_welcome_message(int(guild_id))
            return RedirectResponse(url="/welcome?success=1", status_code=status.HTTP_303_SEE_OTHER)
        except Exception as e:
            print(f"Error deleting welcome message: {e}")
            return RedirectResponse(url="/welcome?error=1", status_code=status.HTTP_303_SEE_OTHER)
    
    return RedirectResponse(url="/welcome", status_code=status.HTTP_303_SEE_OTHER)

@app.get("/discord-channels")
async def discord_channels_page(request: Request):
    if request.cookies.get("auth") != "ok":
        return RedirectResponse(url="/login")
    
    from botdiscord.database import get_discord_servers, get_discord_channels
    
    servers = get_discord_servers()
    channels = get_discord_channels()
    
    # Agrupar canales por servidor
    servers_with_channels = {}
    for server in servers:
        server_id = server['server_id']
        servers_with_channels[server_id] = {
            'server_info': server,
            'channels': [ch for ch in channels if ch['server_id'] == server_id]
        }
    
    success = request.query_params.get("success") == "1"
    error = request.query_params.get("error") == "1"
    synced = request.query_params.get("synced") == "1"
    
    return templates.TemplateResponse("discord_channels.html", {
        "request": request,
        "servers_with_channels": servers_with_channels,
        "success": success,
        "error": error,
        "synced": synced
    })

@app.post("/discord-channels/sync")
async def sync_discord_servers(request: Request):
    if request.cookies.get("auth") != "ok":
        raise HTTPException(status_code=401)
    
    try:
        print("[Panel] Iniciando sincronización de Discord...")
        
        # Diagnóstico de variables de entorno
        print("[Panel] Variables de entorno disponibles:")
        discord_env_vars = {k: v for k, v in os.environ.items() if 'DISCORD' in k or 'TOKEN' in k}
        for key, value in discord_env_vars.items():
            print(f"  {key}: {'***' if 'TOKEN' in key else value}")
        
        # Importar y usar el módulo de sincronización
        from botdiscord.server_sync import sync_discord_servers_from_api
        result = await sync_discord_servers_from_api()
        
        print(f"[Panel] Resultado de sincronización: {result}")
        if result:
            return RedirectResponse(url="/discord-channels?synced=1", status_code=status.HTTP_303_SEE_OTHER)
        else:
            return RedirectResponse(url="/discord-channels?error=1", status_code=status.HTTP_303_SEE_OTHER)
    except Exception as e:
        print(f"[Panel] Error en sincronización: {e}")
        import traceback
        traceback.print_exc()
        return RedirectResponse(url="/discord-channels?error=1", status_code=status.HTTP_303_SEE_OTHER)

@app.post("/discord-channels/toggle")
async def toggle_discord_channel(request: Request):
    if request.cookies.get("auth") != "ok":
        raise HTTPException(status_code=401)
    
    form = await request.form()
    channel_id = form.get("channel_id")
    is_active = form.get("is_active") == "true"
    
    if not channel_id:
        return RedirectResponse(url="/discord-channels?error=1", status_code=status.HTTP_303_SEE_OTHER)
    
    try:
        from botdiscord.database import toggle_channel_status
        from botdiscord.reload_marker import set_reload_marker
        toggle_channel_status(int(channel_id), is_active)
        set_reload_marker()
        return RedirectResponse(url="/discord-channels?success=1", status_code=status.HTTP_303_SEE_OTHER)
    except Exception as e:
        print(f"Error toggling channel: {e}")
        return RedirectResponse(url="/discord-channels?error=1", status_code=status.HTTP_303_SEE_OTHER)

@app.post("/discord-channels/delete-server")
async def delete_discord_server(request: Request):
    if request.cookies.get("auth") != "ok":
        raise HTTPException(status_code=401)
    
    form = await request.form()
    server_id = form.get("server_id")
    
    if not server_id:
        return RedirectResponse(url="/discord-channels?error=1", status_code=status.HTTP_303_SEE_OTHER)
    
    try:
        from botdiscord.database import delete_discord_server
        from botdiscord.reload_marker import set_reload_marker
        delete_discord_server(int(server_id))
        set_reload_marker()
        return RedirectResponse(url="/discord-channels?success=1", status_code=status.HTTP_303_SEE_OTHER)
    except Exception as e:
        print(f"Error deleting server: {e}")
        return RedirectResponse(url="/discord-channels?error=1", status_code=status.HTTP_303_SEE_OTHER)

@app.post("/discord-channels/reload-bot")
async def reload_discord_bot(request: Request):
    if request.cookies.get("auth") != "ok":
        raise HTTPException(status_code=401)
    
    try:
        print("[Panel] Enviando señal de recarga al bot de Discord...")
        
        # Importar y ejecutar la función de recarga
        from botdiscord.bot_reload import reload_bot_config
        result = await reload_bot_config()
        
        if result:
            return RedirectResponse(url="/discord-channels?success=1", status_code=status.HTTP_303_SEE_OTHER)
        else:
            return RedirectResponse(url="/discord-channels?error=1", status_code=status.HTTP_303_SEE_OTHER)
    except Exception as e:
        print(f"[Panel] Error recargando bot: {e}")
        import traceback
        traceback.print_exc()
        return RedirectResponse(url="/discord-channels?error=1", status_code=status.HTTP_303_SEE_OTHER)

@app.post("/discord-channels/bulk-toggle")
async def bulk_toggle_discord_channels(request: Request):
    if request.cookies.get("auth") != "ok":
        raise HTTPException(status_code=401)
    
    form = await request.form()
    channel_ids = form.getlist("channel_ids")
    bulk_action = form.get("bulk_action")
    
    if not channel_ids or not bulk_action:
        return RedirectResponse(url="/discord-channels?error=1", status_code=status.HTTP_303_SEE_OTHER)
    
    try:
        from botdiscord.database import toggle_channel_status
        
        is_active = (bulk_action == "activate")
        success_count = 0
        
        for channel_id_str in channel_ids:
            try:
                channel_id = int(channel_id_str)
                toggle_channel_status(channel_id, is_active)
                success_count += 1
            except ValueError:
                continue
        
        print(f"[Panel] Bulk toggle: {success_count} canales {'activados' if is_active else 'desactivados'}")
        from botdiscord.reload_marker import set_reload_marker
        set_reload_marker()
        return RedirectResponse(url="/discord-channels?success=1", status_code=status.HTTP_303_SEE_OTHER)
        
    except Exception as e:
        print(f"[Panel] Error en bulk toggle: {e}")
        import traceback
        traceback.print_exc()
        return RedirectResponse(url="/discord-channels?error=1", status_code=status.HTTP_303_SEE_OTHER)

@app.get("/diagnosis")
async def diagnosis_page(request: Request):
    if request.cookies.get("auth") != "ok":
        return RedirectResponse(url="/login")
    
    # Obtener variables de entorno relevantes
    env_vars = {
        'DISCORD_TOKEN': os.getenv('DISCORD_TOKEN'),
        'TELEGRAM_TOKEN': os.getenv('TELEGRAM_TOKEN'),
        'LIBRETRANSLATE_URL': os.getenv('LIBRETRANSLATE_URL'),
        'DB_TYPE': os.getenv('DB_TYPE'),
        'DB_HOST': os.getenv('DB_HOST'),
        'DB_PORT': os.getenv('DB_PORT'),
        'DB_NAME': os.getenv('DB_NAME'),
        'DB_USER': os.getenv('DB_USER')
    }
    
    # Obtener configuración cargada
    config = get_config()
    
    return templates.TemplateResponse("diagnosis.html", {
        "request": request,
        "env_vars": env_vars,
        "config": config
    })

if __name__ == "__main__":
    import uvicorn
    web_config = get_web_config()
    uvicorn.run(app, host=web_config.get("host", "0.0.0.0"), port=web_config.get("port", 8000))