from sqlalchemy import Column, Integer, String, Text, DateTime, Enum, ForeignKey, JSON, Boolean
from sqlalchemy.sql import func
from sqlalchemy.orm import relationship
from app.database import Base
import enum

class Tone(str, enum.Enum):
    neutral = "neutral"
    formal = "formal"
    friendly = "friendly"
    investor = "investor"
    pr_bold = "pr_bold"

class ContentType(str, enum.Enum):
    press_release = "press_release"
    ir_letter = "ir_letter"
    investor_summary = "investor_summary"

class DraftStatus(str, enum.Enum):
    draft = "draft"
    pending = "pending"
    approved = "approved"
    scheduled = "scheduled"
    sent = "sent"

class Draft(Base):
    __tablename__ = "drafts"
    id = Column(Integer, primary_key=True, index=True)
    source_type = Column(String(20))  # pdf/url/text
    source_ref = Column(Text)         # URL or filename
    raw_text = Column(Text)
    content_type = Column(Enum(ContentType), nullable=False)
    tone = Column(Enum(Tone), nullable=False, default=Tone.neutral)
    title = Column(String(300))
    body_md = Column(Text)            # Markdown
    status = Column(Enum(DraftStatus), nullable=False, default=DraftStatus.draft)
    created_at = Column(DateTime(timezone=True), server_default=func.now())
    updated_at = Column(DateTime(timezone=True), onupdate=func.now())

    # AB test subjects (A/B)
    subject_a = Column(String(300))
    subject_b = Column(String(300))

    # delivery options
    deliver_email_list = Column(Text)   # comma-separated emails
    deliver_x = Column(Boolean, default=False)
    deliver_note = Column(Boolean, default=False)

    deliveries = relationship("Delivery", back_populates="draft")

class DeliveryChannel(str, enum.Enum):
    email = "email"
    x = "x"
    note = "note"

class Delivery(Base):
    __tablename__ = "deliveries"
    id = Column(Integer, primary_key=True)
    draft_id = Column(Integer, ForeignKey("drafts.id"))
    channel = Column(Enum(DeliveryChannel), nullable=False)
    payload = Column(JSON)
    result = Column(JSON)
    created_at = Column(DateTime(timezone=True), server_default=func.now())

    draft = relationship("Draft", back_populates="deliveries")