import enum
import uuid
from sqlalchemy import (
    JSON,
    Boolean,
    Column,
    DateTime,
    Enum as SQLEnum,
    Float,
    ForeignKey,
    Integer,
    String,
    Text,
)
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func

from core.database import Base


class LeadStatus(str, enum.Enum):
    NEW = "new"
    QUALIFIED = "qualified"
    DISQUALIFIED = "disqualified"
    CONTACTED = "contacted"
    SPAM = "spam"

class DealStage(str, enum.Enum):
    DISCOVERY = "discovery"
    QUALIFICATION = "qualification"
    PROPOSAL = "proposal"
    NEGOTIATION = "negotiation"
    CLOSED_WON = "closed_won"
    CLOSED_LOST = "closed_lost"

class CommissionStatus(str, enum.Enum):
    ACCRUED = "accrued"
    APPROVED = "approved"
    PAID = "paid"
    CANCELLED = "cancelled"

class Lead(Base):
    __tablename__ = "sales_leads"

    id = Column(String, primary_key=True, default=lambda: str(uuid.uuid4()))
    workspace_id = Column(String, ForeignKey("workspaces.id"), nullable=False)
    external_id = Column(String, nullable=True, index=True) # HubSpot/Salesforce ID
    email = Column(String, nullable=False)
    first_name = Column(String, nullable=True)
    last_name = Column(String, nullable=True)
    company = Column(String, nullable=True)
    source = Column(String, nullable=True) # Website, LinkedIn, etc.
    status = Column(SQLEnum(LeadStatus), default=LeadStatus.NEW)

    # AI Enrichment
    ai_score = Column(Float, default=0.0)
    ai_qualification_summary = Column(Text, nullable=True)
    is_spam = Column(Boolean, default=False)
    is_converted = Column(Boolean, default=False)

    metadata_json = Column(JSON, nullable=True)
    created_at = Column(DateTime(timezone=True), server_default=func.now())
    updated_at = Column(DateTime(timezone=True), onupdate=func.now())

class NegotiationState(str, enum.Enum):
    INITIAL = "initial"
    DISCOVERY = "discovery"
    BARGAINING = "bargaining"
    CLOSING = "closing"
    FOLLOW_UP = "follow_up"
    WON = "won"
    LOST = "lost"

class Deal(Base):
    __tablename__ = "sales_deals"

    id = Column(String, primary_key=True, default=lambda: str(uuid.uuid4()))
    workspace_id = Column(String, ForeignKey("workspaces.id"), nullable=False)
    external_id = Column(String, nullable=True, index=True)
    name = Column(String, nullable=False)
    value = Column(Float, default=0.0)
    currency = Column(String, default="USD")
    stage = Column(SQLEnum(DealStage), default=DealStage.DISCOVERY)
    probability = Column(Float, default=0.0)

    # Intelligence
    health_score = Column(Float, default=0.0) # 0 to 100
    risk_level = Column(String, default="low") # low, medium, high
    last_engagement_at = Column(DateTime(timezone=True), nullable=True)
    negotiation_state = Column(SQLEnum(NegotiationState), default=NegotiationState.INITIAL)
    last_followup_at = Column(DateTime(timezone=True), nullable=True)
    followup_count = Column(Integer, default=0)

    metadata_json = Column(JSON, nullable=True)
    created_at = Column(DateTime(timezone=True), server_default=func.now())
    updated_at = Column(DateTime(timezone=True), onupdate=func.now())

    # Relationships
    transcripts = relationship("CallTranscript", back_populates="deal")
    commissions = relationship("CommissionEntry", back_populates="deal")

class CommissionEntry(Base):
    __tablename__ = "sales_commissions"

    id = Column(String, primary_key=True, default=lambda: str(uuid.uuid4()))
    workspace_id = Column(String, ForeignKey("workspaces.id"), nullable=False)
    deal_id = Column(String, ForeignKey("sales_deals.id"), nullable=False)
    invoice_id = Column(String, nullable=True) # Linked accounting invoice

    payee_id = Column(String, nullable=True) # User/Rep ID
    amount = Column(Float, nullable=False)
    currency = Column(String, default="USD")
    status = Column(SQLEnum(CommissionStatus), default=CommissionStatus.ACCRUED)

    calculated_at = Column(DateTime(timezone=True), server_default=func.now())
    paid_at = Column(DateTime(timezone=True), nullable=True)

    metadata_json = Column(JSON, nullable=True)

    # Relationships
    deal = relationship("Deal", back_populates="commissions")

class CallTranscript(Base):
    __tablename__ = "sales_call_transcripts"

    id = Column(String, primary_key=True, default=lambda: str(uuid.uuid4()))
    workspace_id = Column(String, ForeignKey("workspaces.id"), nullable=False)
    deal_id = Column(String, ForeignKey("sales_deals.id"), nullable=True)
    meeting_id = Column(String, nullable=True) # Zoom/Teams ID

    title = Column(String, nullable=True)
    raw_transcript = Column(Text, nullable=False)
    summary = Column(Text, nullable=True)
    objections = Column(JSON, nullable=True) # List of extracted objections
    action_items = Column(JSON, nullable=True) # List of extracted tasks
    metadata_json = Column(JSON, nullable=True)

    created_at = Column(DateTime(timezone=True), server_default=func.now())

    # Relationships
    deal = relationship("Deal", back_populates="transcripts")

class FollowUpTask(Base):
    __tablename__ = "sales_follow_up_tasks"

    id = Column(String, primary_key=True, default=lambda: str(uuid.uuid4()))
    workspace_id = Column(String, ForeignKey("workspaces.id"), nullable=False)
    deal_id = Column(String, ForeignKey("sales_deals.id"), nullable=False)

    description = Column(Text, nullable=False)
    suggested_date = Column(DateTime(timezone=True), nullable=True)
    is_completed = Column(Boolean, default=False)

    # Reason why AI suggested this
    ai_rationale = Column(Text, nullable=True)

    created_at = Column(DateTime(timezone=True), server_default=func.now())