import uuid
from datetime import datetime
from sqlalchemy import Column, String, Boolean, DateTime, Text, Integer, ForeignKey, Enum as SQLEnum
from sqlalchemy.dialects.postgresql import UUID, JSONB, ARRAY
from sqlalchemy.orm import relationship
import enum
from app.core.database import Base


class AccountStatus(str, enum.Enum):
    CONNECTING = "connecting"
    CONNECTED = "connected"
    DISCONNECTED = "disconnected"


class ConversationStatus(str, enum.Enum):
    BOT = "bot"
    WAITING = "waiting"
    ACTIVE = "active"
    RESOLVED = "resolved"


class MessageDirection(str, enum.Enum):
    INBOUND = "inbound"
    OUTBOUND = "outbound"


class MessageType(str, enum.Enum):
    TEXT = "text"
    IMAGE = "image"
    AUDIO = "audio"
    VIDEO = "video"
    DOCUMENT = "document"
    LOCATION = "location"
    CONTACT = "contact"
    STICKER = "sticker"
    BUTTONS = "buttons"
    LIST = "list"


class MessageStatus(str, enum.Enum):
    PENDING = "pending"
    SENT = "sent"
    DELIVERED = "delivered"
    READ = "read"
    FAILED = "failed"


class WhatsAppAccount(Base):
    __tablename__ = "whatsapp_accounts"

    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    phone_number = Column(String(20), nullable=True)
    name = Column(String(100), nullable=False)
    status = Column(SQLEnum(AccountStatus), default=AccountStatus.DISCONNECTED, nullable=False)
    session_data = Column(JSONB, nullable=True)
    qr_code = Column(Text, nullable=True)
    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)

    conversations = relationship("Conversation", back_populates="whatsapp_account")


class Contact(Base):
    __tablename__ = "contacts"

    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    phone_number = Column(String(20), unique=True, nullable=False, index=True)
    name = Column(String(100), nullable=True)
    email = Column(String(255), nullable=True)
    company = Column(String(100), nullable=True)
    metadata = Column(JSONB, default=dict)
    tags = Column(ARRAY(String), default=list)
    odoo_partner_id = Column(Integer, nullable=True)
    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)

    conversations = relationship("Conversation", back_populates="contact")


class Conversation(Base):
    __tablename__ = "conversations"

    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    whatsapp_account_id = Column(UUID(as_uuid=True), ForeignKey("whatsapp_accounts.id"), nullable=False)
    contact_id = Column(UUID(as_uuid=True), ForeignKey("contacts.id"), nullable=False)
    assigned_to = Column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=True)
    status = Column(SQLEnum(ConversationStatus), default=ConversationStatus.BOT, nullable=False)
    last_message_at = Column(DateTime, nullable=True)
    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)

    whatsapp_account = relationship("WhatsAppAccount", back_populates="conversations")
    contact = relationship("Contact", back_populates="conversations")
    messages = relationship("Message", back_populates="conversation", order_by="Message.created_at")


class Message(Base):
    __tablename__ = "messages"

    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    conversation_id = Column(UUID(as_uuid=True), ForeignKey("conversations.id"), nullable=False)
    whatsapp_message_id = Column(String(100), nullable=True)
    direction = Column(SQLEnum(MessageDirection), nullable=False)
    type = Column(SQLEnum(MessageType), default=MessageType.TEXT, nullable=False)
    content = Column(Text, nullable=True)
    media_url = Column(String(500), nullable=True)
    metadata = Column(JSONB, default=dict)
    sent_by = Column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=True)
    is_internal_note = Column(Boolean, default=False, nullable=False)
    status = Column(SQLEnum(MessageStatus), default=MessageStatus.PENDING, nullable=False)
    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)

    conversation = relationship("Conversation", back_populates="messages")