from sqlalchemy import Column, Integer, String, Boolean, DateTime, ForeignKey, Text
from sqlalchemy.sql import func
from app.db.session import Base

class Task(Base):
    __tablename__ = "tasks"

    id = Column(Integer, primary_key=True, index=True)
    title = Column(String, index=True, nullable=False)
    description = Column(Text, nullable=True)
    priority = Column(Integer, default=0) # e.g. 1=High, 2=Medium, 3=Low
    position = Column(Integer, default=0) # order within priority
    status = Column(String, default="open") # open, in_progress, review, completed, dismissed
    origin = Column(String, nullable=True) # e.g. "gmail", "nextcloud_todo:Personal", "manual"
    source_id = Column(String, nullable=True, index=True)  # CalDAV UID or IMAP Message-ID
    source_url = Column(String, nullable=True)  # Link to original item (email, task board, etc.)
    created_at = Column(DateTime(timezone=True), server_default=func.now())
    due_date = Column(DateTime(timezone=True), nullable=True)
    hidden_until = Column(DateTime(timezone=True), nullable=True)
    agent_ready = Column(Boolean, default=False) # Flag: orchestrator can pick this up
    labels = Column(String, nullable=True) # Comma-separated labels for filtering
    last_synced_at = Column(DateTime(timezone=True), nullable=True)  # When last synced with remote
    has_conflict = Column(Boolean, default=False)  # True if conflict detected
    conflict_data = Column(Text, nullable=True)  # JSON: remote version of conflicting fields

class Event(Base):
    __tablename__ = "events"

    id = Column(Integer, primary_key=True, index=True)
    title = Column(String, index=True, nullable=False)
    start_time = Column(DateTime(timezone=True), nullable=False)
    end_time = Column(DateTime(timezone=True), nullable=False)
    source = Column(String, nullable=False) # e.g. "google", "nextcloud"
    is_conflict = Column(Boolean, default=False)
    created_at = Column(DateTime(timezone=True), server_default=func.now())

class Suggestion(Base):
    __tablename__ = "suggestions"

    id = Column(Integer, primary_key=True, index=True)
    content = Column(String, nullable=False)
    explanation = Column(Text, nullable=True)
    type = Column(String, nullable=False) # e.g. "schedule_task", "resolve_conflict"
    status = Column(String, default="pending") # pending, accepted, rejected
    created_at = Column(DateTime(timezone=True), server_default=func.now())


class UserSession(Base):
    __tablename__ = "user_sessions"

    id = Column(Integer, primary_key=True, index=True)
    session_id = Column(String, unique=True, index=True, nullable=False)
    username = Column(String, nullable=False)
    expires_at = Column(DateTime, nullable=False)
    created_at = Column(DateTime(timezone=True), server_default=func.now())


class ProjectTask(Base):
    __tablename__ = "project_tasks"

    id = Column(Integer, primary_key=True, index=True)
    title = Column(String, nullable=False)
    description = Column(Text, nullable=True)
    repo = Column(String, nullable=True)  # e.g. "OrgMyLife", "AI-Orchestrator"
    status = Column(String, default="backlog")  # backlog, ready, in_progress, blocked, review, done
    priority = Column(Integer, default=3)
    created_at = Column(DateTime(timezone=True), server_default=func.now())
    updated_at = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())


class CallItem(Base):
    __tablename__ = "call_items"

    id = Column(Integer, primary_key=True, index=True)
    person = Column(String(200), nullable=False)
    reason = Column(String(500), nullable=False)
    phone_number = Column(String(30), nullable=True)
    original_task_id = Column(Integer, ForeignKey("tasks.id"), nullable=True)
    priority = Column(Integer, default=3)  # 1=Very High, 2=High, 3=Medium, 4=Low
    status = Column(String, default="pending")  # "pending" or "done"
    created_at = Column(DateTime(timezone=True), server_default=func.now())