"""
PublisherManager - Gestor unificado de publicaciones.
Coordina todos los publishers y proporciona una interfaz única.
"""

import asyncio
from typing import Optional, List, Dict, Any
from dataclasses import dataclass
from enum import Enum

from app.publishers.base import PublishResult
from app.publishers.x_publisher import XPublisher
from app.publishers.threads_publisher import ThreadsPublisher
from app.publishers.facebook_publisher import FacebookPublisher
from app.publishers.instagram_publisher import InstagramPublisher
from app.services.image_upload import image_upload


class Platform(str, Enum):
    """Plataformas soportadas."""
    X = "x"
    THREADS = "threads"
    FACEBOOK = "facebook"
    INSTAGRAM = "instagram"


@dataclass
class MultiPublishResult:
    """Resultado de publicación en múltiples plataformas."""
    success: bool
    results: Dict[str, PublishResult]
    errors: List[str]

    @property
    def successful_platforms(self) -> List[str]:
        """Plataformas donde se publicó exitosamente."""
        return [p for p, r in self.results.items() if r.success]

    @property
    def failed_platforms(self) -> List[str]:
        """Plataformas donde falló la publicación."""
        return [p for p, r in self.results.items() if not r.success]


class PublisherManager:
    """
    Gestor unificado de publicaciones.

    Proporciona una interfaz única para publicar contenido
    en todas las plataformas soportadas.
    """

    def __init__(self):
        self._publishers = {}
        self._init_publishers()

    def _init_publishers(self):
        """Inicializar publishers disponibles."""
        self._publishers = {
            Platform.X: XPublisher(),
            Platform.THREADS: ThreadsPublisher(),
            Platform.FACEBOOK: FacebookPublisher(),
            Platform.INSTAGRAM: InstagramPublisher(),
        }

    def get_publisher(self, platform: Platform):
        """Obtener publisher para una plataforma."""
        return self._publishers.get(platform)

    def get_available_platforms(self) -> List[str]:
        """Obtener lista de plataformas con credenciales configuradas."""
        available = []

        for platform, publisher in self._publishers.items():
            if self._is_configured(platform):
                available.append(platform.value)

        return available

    def _is_configured(self, platform: Platform) -> bool:
        """Verificar si una plataforma tiene credenciales configuradas."""
        publisher = self._publishers.get(platform)

        if not publisher:
            return False

        if platform == Platform.X:
            return publisher.client is not None
        elif platform == Platform.THREADS:
            return bool(publisher.access_token and publisher.user_id)
        elif platform == Platform.FACEBOOK:
            return bool(publisher.access_token and publisher.page_id)
        elif platform == Platform.INSTAGRAM:
            return bool(publisher.access_token and publisher.account_id)

        return False

    async def publish(
        self,
        platform: Platform,
        content: str,
        image_path: Optional[str] = None
    ) -> PublishResult:
        """
        Publicar en una plataforma específica.

        Args:
            platform: Plataforma destino
            content: Texto del post
            image_path: Ruta local a imagen (opcional)

        Returns:
            PublishResult con el resultado
        """
        publisher = self._publishers.get(platform)

        if not publisher:
            return PublishResult(
                success=False,
                error_message=f"Plataforma no soportada: {platform}"
            )

        # Validar contenido
        if not publisher.validate_content(content):
            return PublishResult(
                success=False,
                error_message=f"Contenido excede límite de {publisher.char_limit} caracteres"
            )

        # Subir imagen si es necesario para Meta APIs
        public_image_url = None
        if image_path and platform in [Platform.THREADS, Platform.FACEBOOK, Platform.INSTAGRAM]:
            try:
                public_image_url = await image_upload.upload_from_path(image_path)
            except Exception as e:
                return PublishResult(
                    success=False,
                    error_message=f"Error subiendo imagen: {e}"
                )

        # Publicar
        try:
            if platform == Platform.X:
                return await publisher.publish(content, image_path)
            else:
                return await publisher.publish(content, public_image_url or image_path)
        except Exception as e:
            return PublishResult(
                success=False,
                error_message=f"Error al publicar: {e}"
            )

    async def publish_to_multiple(
        self,
        platforms: List[Platform],
        content: Dict[str, str],
        image_path: Optional[str] = None,
        parallel: bool = True
    ) -> MultiPublishResult:
        """
        Publicar en múltiples plataformas.

        Args:
            platforms: Lista de plataformas
            content: Dict con contenido por plataforma {platform: texto}
                     o string único para todas
            image_path: Ruta a imagen (opcional)
            parallel: Si True, publica en paralelo

        Returns:
            MultiPublishResult con resultados por plataforma
        """
        results = {}
        errors = []

        # Normalizar contenido
        if isinstance(content, str):
            content = {p.value: content for p in platforms}

        # Subir imagen una sola vez si es necesario
        public_image_url = None
        if image_path:
            try:
                public_image_url = await image_upload.upload_from_path(image_path)
            except Exception as e:
                errors.append(f"Error subiendo imagen: {e}")

        async def publish_to_platform(platform: Platform):
            platform_content = content.get(platform.value, "")

            if not platform_content:
                return platform, PublishResult(
                    success=False,
                    error_message="Sin contenido para esta plataforma"
                )

            # X usa ruta local, Meta usa URL pública
            img = image_path if platform == Platform.X else public_image_url

            result = await self.publish(platform, platform_content, img)
            return platform, result

        if parallel:
            # Publicar en paralelo
            tasks = [publish_to_platform(p) for p in platforms]
            platform_results = await asyncio.gather(*tasks, return_exceptions=True)

            for item in platform_results:
                if isinstance(item, Exception):
                    errors.append(str(item))
                else:
                    platform, result = item
                    results[platform.value] = result
        else:
            # Publicar secuencialmente
            for platform in platforms:
                try:
                    _, result = await publish_to_platform(platform)
                    results[platform.value] = result
                except Exception as e:
                    errors.append(f"{platform.value}: {e}")
                    results[platform.value] = PublishResult(
                        success=False,
                        error_message=str(e)
                    )

        # Determinar éxito global
        success = any(r.success for r in results.values())

        return MultiPublishResult(
            success=success,
            results=results,
            errors=errors
        )

    async def publish_thread(
        self,
        platform: Platform,
        posts: List[str],
        images: Optional[List[str]] = None
    ) -> PublishResult:
        """Publicar un hilo en una plataforma."""
        publisher = self._publishers.get(platform)

        if not publisher:
            return PublishResult(
                success=False,
                error_message=f"Plataforma no soportada: {platform}"
            )

        return await publisher.publish_thread(posts, images)

    async def test_connection(self, platform: Platform) -> Dict[str, Any]:
        """
        Probar conexión con una plataforma.

        Returns:
            Dict con status y detalles
        """
        result = {
            "platform": platform.value,
            "configured": self._is_configured(platform),
            "connected": False,
            "error": None,
            "details": {}
        }

        if not result["configured"]:
            result["error"] = "Credenciales no configuradas"
            return result

        publisher = self._publishers.get(platform)

        try:
            if platform == Platform.X:
                me = publisher.client.get_me()
                if me.data:
                    result["connected"] = True
                    result["details"] = {
                        "username": me.data.username,
                        "name": me.data.name,
                        "id": str(me.data.id)
                    }

            elif platform == Platform.THREADS:
                import httpx
                async with httpx.AsyncClient() as client:
                    url = f"{publisher.base_url}/{publisher.user_id}"
                    params = {
                        "fields": "id,username",
                        "access_token": publisher.access_token
                    }
                    response = await client.get(url, params=params)
                    if response.status_code == 200:
                        data = response.json()
                        result["connected"] = True
                        result["details"] = data

            elif platform == Platform.FACEBOOK:
                import httpx
                async with httpx.AsyncClient() as client:
                    url = f"{publisher.base_url}/{publisher.page_id}"
                    params = {
                        "fields": "id,name,followers_count",
                        "access_token": publisher.access_token
                    }
                    response = await client.get(url, params=params)
                    if response.status_code == 200:
                        data = response.json()
                        result["connected"] = True
                        result["details"] = data

            elif platform == Platform.INSTAGRAM:
                import httpx
                async with httpx.AsyncClient() as client:
                    url = f"{publisher.base_url}/{publisher.account_id}"
                    params = {
                        "fields": "id,username,followers_count,media_count",
                        "access_token": publisher.access_token
                    }
                    response = await client.get(url, params=params)
                    if response.status_code == 200:
                        data = response.json()
                        result["connected"] = True
                        result["details"] = data

        except Exception as e:
            result["error"] = str(e)

        return result

    async def test_all_connections(self) -> Dict[str, Dict[str, Any]]:
        """Probar conexión con todas las plataformas."""
        results = {}

        for platform in Platform:
            results[platform.value] = await self.test_connection(platform)

        return results


# Instancia global
publisher_manager = PublisherManager()