from odoo import models, fields, api
import logging
from datetime import datetime

_logger = logging.getLogger(__name__)

class WWGroup(models.Model):
    _name = 'ww.group'
    _description = 'Grupo de WhatsApp Web'

    name = fields.Char(string='Nombre del Grupo', required=True)
    whatsapp_web_id = fields.Char(string='ID WhatsApp Web', index=True, help='ID único del grupo en WhatsApp Web')
    whatsapp_account_id = fields.Many2one('whatsapp.account', string='Cuenta de WhatsApp', required=True)
    channel_id = fields.Many2one('discuss.channel', string='Canal de Discusión', readonly=True)
    contact_ids = fields.Many2many(
        comodel_name='res.partner',
        relation='ww_group_contact_rel',
        column1='group_id',
        column2='contact_id',
        string='Contactos',
        readonly=True,
    )

    def _process_messages(self, messages_data):
        """Process WhatsApp messages and create them in the channel"""
        self.ensure_one()
        
        if not messages_data or not self.channel_id:
            return True

        # Get existing message IDs to avoid duplicates
        existing_ids = set(self.channel_id.message_ids.mapped('message_id'))
        
        # Prepare bulk create values
        message_vals_list = []
        for msg_data in messages_data:
            msg_id = msg_data.get('id', {}).get('_serialized')
            
            # Skip if message already exists
            if msg_id in existing_ids:
                continue

            # Get author partner
            author_whatsapp_id = msg_data.get('author')
            author = self.env['res.partner'].search([
                ('whatsapp_web_id', '=', author_whatsapp_id)
            ], limit=1) if author_whatsapp_id else False

            # Get quoted message author if exists
            quoted_author = False
            if msg_data.get('hasQuotedMsg') and msg_data.get('quotedParticipant'):
                quoted_author = self.env['res.partner'].search([
                    ('whatsapp_web_id', '=', msg_data['quotedParticipant'])
                ], limit=1)

            # Convert timestamp to datetime
            timestamp = datetime.fromtimestamp(msg_data.get('timestamp', 0))

            # Prepare message body with author and content
            author_name = author.name if author else "Desconocido"
            message_body = f"{msg_data.get('body', '')}"

            # Add quoted message if exists
            if msg_data.get('hasQuotedMsg') and msg_data.get('quotedMsg', {}).get('body'):
                quoted_author_name = quoted_author.name if quoted_author else "Desconocido"
                message_body += f"\n\n<blockquote><strong>{quoted_author_name}:</strong> {msg_data['quotedMsg']['body']}</blockquote>"

            message_vals = {
                'model': 'discuss.channel',
                'res_id': self.channel_id.id,
                'message_type': 'comment',
                'subtype_id': self.env.ref('mail.mt_comment').id,
                'body': message_body,
                'date': timestamp,
                'author_id': author.id if author else self.env.user.partner_id.id,
                'message_id': msg_id,
            }
            message_vals_list.append(message_vals)

        # Bulk create messages
        if message_vals_list:
            self.env['mail.message'].create(message_vals_list)

        return True

    def _create_discussion_channel(self):
        """Create a discussion channel for the WhatsApp group"""
        self.ensure_one()
        
        try:
            # Verificar si ya existe un canal para este grupo
            if self.channel_id:
                return self.channel_id

            # Create channel name with WhatsApp prefix
            channel_name = f"📱 {self.name}"
            
            # Verificar que hay contactos
            if not self.contact_ids:
                _logger.warning(f"No hay contactos para crear el canal del grupo {self.name}")
                return False

            # Obtener los IDs de los contactos de forma segura
            partner_ids = []
            for contact in self.contact_ids:
                if contact and contact.id:
                    partner_ids.append(contact.id)

            if not partner_ids:
                _logger.warning(f"No se encontraron IDs válidos de contactos para el grupo {self.name}")
                return False

            # Create the channel using channel_create
            channel = self.env['discuss.channel'].channel_create(
                name=channel_name,
                group_id=self.env.user.groups_id[0].id,  # Usar el primer grupo del usuario actual
            )
            
            # Add members to the channel
            channel.add_members(partner_ids=partner_ids)
            
            # Link the channel to the group
            self.write({'channel_id': channel.id})
            return channel
            
        except Exception as e:
            _logger.error(f"Error al crear el canal para el grupo {self.name}: {str(e)}")
            return False

    def _update_discussion_channel(self):
        """Update the discussion channel members"""
        self.ensure_one()
        
        try:
            # Si no existe el canal, intentar crearlo
            if not self.channel_id:
                return self._create_discussion_channel()
            
            # Verificar que el canal aún existe
            channel = self.env['discuss.channel'].browse(self.channel_id.id)
            if not channel.exists():
                _logger.warning(f"El canal para el grupo {self.name} ya no existe, creando uno nuevo")
                self.write({'channel_id': False})
                return self._create_discussion_channel()
                
            # Obtener los IDs de los contactos de forma segura
            partner_ids = []
            for contact in self.contact_ids:
                if contact and contact.id:
                    partner_ids.append(contact.id)

            if not partner_ids:
                _logger.warning(f"No hay contactos válidos para actualizar el canal del grupo {self.name}")
                return channel

            # Update channel members using add_members
            channel.add_members(partner_ids=partner_ids)
            return channel
            
        except Exception as e:
            _logger.error(f"Error al actualizar el canal para el grupo {self.name}: {str(e)}")
            return False

    @api.model
    def sync_ww_contacts_groups(self):
        """
        Sincroniza los contactos y grupos de WhatsApp Web.
        Solo sincroniza contactos que están dentro de grupos y valida que no se dupliquen,
        verificando los últimos 10 dígitos del campo mobile.
        """
        accounts = self.env['whatsapp.account'].search([])
        
        for account in accounts:
            try:
                # Obtener grupos usando el método de la cuenta
                groups_data = account.get_groups()
                if not groups_data:
                    continue
                
                # Procesar cada grupo
                for group_data in groups_data:
                    group_id = group_data.get('id').get('_serialized')
                    group_name = group_data.get('name', 'Sin nombre')
                    
                    # Buscar o crear grupo
                    group = self.search([
                        ('whatsapp_web_id', '=', group_id),
                        ('whatsapp_account_id', '=', account.id)
                    ], limit=1)
                    
                    if not group:
                        group = self.create({
                            'name': group_name,
                            'whatsapp_web_id': group_id,
                            'whatsapp_account_id': account.id
                        })
                        # Create discussion channel for new group
                        group._create_discussion_channel()
                    else:
                        # Actualizar nombre del grupo si cambió
                        if group.name != group_name:
                            group.write({'name': group_name})
                            # Actualizar nombre del canal si existe
                            if group.channel_id:
                                group.channel_id.write({'name': f"📱 {group_name}"})

                    # Procesar participantes del grupo
                    participants = group_data.get('members', [])
                    contact_ids = []

                    for participant in participants:
                        whatsapp_web_id = participant.get('id', {}).get('_serialized')
                        mobile = participant.get('number', '')
                        is_admin = participant.get('isAdmin', False)
                        is_super_admin = participant.get('isSuperAdmin', False)

                        # Derive participant name
                        participant_name = participant.get('name') or participant.get('pushname') or mobile

                        # Search for existing contact
                        contact = self.env['res.partner'].search([
                            ('whatsapp_web_id', '=', whatsapp_web_id)
                        ], limit=1)

                        if not contact and mobile and len(mobile) >= 10:
                            last_10_digits = mobile[-10:]
                            contact = self.env['res.partner'].search([
                                ('mobile', 'like', '%' + last_10_digits)
                            ], limit=1)

                        partner_vals = {
                            'name': participant_name,
                            'mobile': mobile,
                            'whatsapp_web_id': whatsapp_web_id,
                        }

                        if contact:
                            # Update existing contact
                            contact.write(partner_vals)
                        else:
                            # Create new contact
                            contact = self.env['res.partner'].create(partner_vals)
                        
                        if contact:
                            contact_ids.append(contact.id)
                    
                    # Actualizar contactos del grupo
                    group.write({'contact_ids': [(6, 0, contact_ids)]})
                    
                    # Update discussion channel members
                    group._update_discussion_channel()

                    # Process messages if available
                    messages = group_data.get('messages', [])
                    if messages:
                        group._process_messages(messages)

            except Exception as e:
                _logger.error("Error en la sincronización de grupos para la cuenta %s: %s", account.name, str(e))
                continue

        return True