from sqlalchemy import create_engine, Column, Integer, String, Text, DateTime, ForeignKey, Float, Boolean, JSON
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker, relationship
from datetime import datetime
from .config import settings

# Setup
engine = create_engine(settings.DATABASE_URL, connect_args={"check_same_thread": False})
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
Base = declarative_base()

# ==============================================================================
# MODELS
# ==============================================================================

class Company(Base):
    __tablename__ = "companies"

    id = Column(Integer, primary_key=True, index=True)
    
    # Core Identity
    name = Column(String, index=True)
    website = Column(String, index=True) # Normalized Domain preferred
    crm_id = Column(String, unique=True, index=True, nullable=True) # Link to D365
    
    # Classification
    industry_crm = Column(String, nullable=True) # The "allowed" industry
    industry_ai = Column(String, nullable=True)  # The AI suggested industry
    
    # Location
    city = Column(String, nullable=True)
    country = Column(String, default="DE")
    
    # Workflow Status
    status = Column(String, default="NEW", index=True)

    # Granular Process Tracking (Timestamps)
    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
    
    last_scraped_at = Column(DateTime, nullable=True)
    last_wiki_search_at = Column(DateTime, nullable=True)
    last_classification_at = Column(DateTime, nullable=True)
    last_signal_check_at = Column(DateTime, nullable=True)

    # NEW: Quantitative Potential Metrics (v0.7.0)
    calculated_metric_name = Column(String, nullable=True)  # e.g., "Anzahl Betten"
    calculated_metric_value = Column(Float, nullable=True)   # e.g., 180.0
    calculated_metric_unit = Column(String, nullable=True)   # e.g., "Betten"
    standardized_metric_value = Column(Float, nullable=True) # e.g., 4500.0
    standardized_metric_unit = Column(String, nullable=True) # e.g., "m²"
    metric_source = Column(String, nullable=True)            # "website", "wikipedia", "serpapi"
    metric_proof_text = Column(Text, nullable=True)          # Snippet showing the value (e.g. "2,0 Mio Besucher (2020)")
    metric_source_url = Column(Text, nullable=True)          # URL where the proof was found
    metric_confidence = Column(Float, nullable=True)         # 0.0 - 1.0
    metric_confidence_reason = Column(Text, nullable=True)   # Why is it high/low?
    
    # Relationships
    signals = relationship("Signal", back_populates="company", cascade="all, delete-orphan")
    enrichment_data = relationship("EnrichmentData", back_populates="company", cascade="all, delete-orphan")
    reported_mistakes = relationship("ReportedMistake", back_populates="company", cascade="all, delete-orphan")
    contacts = relationship("Contact", back_populates="company", cascade="all, delete-orphan")


class Contact(Base):
    """
    Represents a person associated with a company.
    """
    __tablename__ = "contacts"

    id = Column(Integer, primary_key=True, index=True)
    company_id = Column(Integer, ForeignKey("companies.id"), index=True)
    
    gender = Column(String) # "männlich", "weiblich"
    title = Column(String, default="") # "Dr.", "Prof."
    first_name = Column(String)
    last_name = Column(String)
    email = Column(String, index=True)
    job_title = Column(String) # Visitenkarten-Titel
    language = Column(String, default="De") # "De", "En"
    
    role = Column(String) # Operativer Entscheider, etc.
    status = Column(String, default="") # Marketing Status
    
    is_primary = Column(Boolean, default=False)
    
    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
    
    company = relationship("Company", back_populates="contacts")


class Industry(Base):
    """
    Represents a specific industry vertical (Branche).
    """
    __tablename__ = "industries"

    id = Column(Integer, primary_key=True, index=True)
    notion_id = Column(String, unique=True, index=True, nullable=True) # Notion Page ID
    
    name = Column(String, unique=True, index=True)
    description = Column(Text, nullable=True) # Definition aus Notion
    
    # Notion Sync Fields (V3.0+)
    status_notion = Column(String, nullable=True) # e.g. "P1 Focus Industry"
    is_focus = Column(Boolean, default=False) # Derived from status_notion
    
    # NEW SCHEMA FIELDS (from MIGRATION_PLAN)
    metric_type = Column(String, nullable=True) # Unit_Count, Area_in, Area_out
    min_requirement = Column(Float, nullable=True)
    whale_threshold = Column(Float, nullable=True)
    proxy_factor = Column(Float, nullable=True)
    scraper_search_term = Column(Text, nullable=True)
    scraper_keywords = Column(Text, nullable=True) # JSON-Array von Strings
    standardization_logic = Column(Text, nullable=True) # Formel, z.B. "wert * 25m²"
    
    # Optional link to a Robotics Category (the "product" relevant for this industry)
    primary_category_id = Column(Integer, ForeignKey("robotics_categories.id"), nullable=True)
    
    created_at = Column(DateTime, default=datetime.utcnow)


class JobRoleMapping(Base):
    """
    Maps job title patterns (regex or simple string) to Roles.
    """
    __tablename__ = "job_role_mappings"

    id = Column(Integer, primary_key=True, index=True)
    pattern = Column(String, unique=True) # e.g. "%CTO%" or "Technischer Leiter"
    role = Column(String) # The target Role
    
    created_at = Column(DateTime, default=datetime.utcnow)


class Signal(Base):
    """
    Represents a specific sales signal or potential.
    Example: type='has_spa', value='true', proof='Wellnessbereich mit 2000qm'
    """
    __tablename__ = "signals"

    id = Column(Integer, primary_key=True, index=True)
    company_id = Column(Integer, ForeignKey("companies.id"))
    
    signal_type = Column(String, index=True) # e.g. "robotics_cleaning_potential"
    confidence = Column(Float, default=0.0)  # 0.0 to 1.0
    value = Column(String) # "High", "Medium", "Yes", "No"
    proof_text = Column(Text, nullable=True) # Snippet from website/source
    
    created_at = Column(DateTime, default=datetime.utcnow)
    
    company = relationship("Company", back_populates="signals")


class EnrichmentData(Base):
    """
    Stores raw data blobs (HTML, API responses) to allow re-processing.
    """
    __tablename__ = "enrichment_data"

    id = Column(Integer, primary_key=True, index=True)
    company_id = Column(Integer, ForeignKey("companies.id"))
    
    source_type = Column(String) # "website_scrape", "wikipedia", "google_serp"
    content = Column(JSON)       # The raw data
    is_locked = Column(Boolean, default=False) # Manual override flag
    wiki_verified_empty = Column(Boolean, default=False) # NEW: Mark Wikipedia as definitively empty
    
    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
    
    company = relationship("Company", back_populates="enrichment_data")


class RoboticsCategory(Base):
    """
    Stores definitions for robotics categories to allow user customization via UI.
    """
    __tablename__ = "robotics_categories"

    id = Column(Integer, primary_key=True, index=True)
    notion_id = Column(String, unique=True, index=True, nullable=True) # Notion Page ID
    
    key = Column(String, unique=True, index=True) # e.g. "cleaning", "service"
    name = Column(String) # Display Name
    description = Column(Text) # The core definition used in LLM prompts
    reasoning_guide = Column(Text) # Instructions for the Chain-of-Thought
    
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)

class ImportLog(Base):
    """
    Logs bulk imports (e.g. from Excel lists).
    """
    __tablename__ = "import_logs"
    
    id = Column(Integer, primary_key=True)
    filename = Column(String)
    import_type = Column(String) # "crm_dump" or "event_list"
    total_rows = Column(Integer)
    imported_rows = Column(Integer)
    duplicate_rows = Column(Integer)
    created_at = Column(DateTime, default=datetime.utcnow)


class ReportedMistake(Base):
    __tablename__ = "reported_mistakes"

    id = Column(Integer, primary_key=True, index=True)
    company_id = Column(Integer, ForeignKey("companies.id"), index=True, nullable=False)
    field_name = Column(String, nullable=False)
    wrong_value = Column(Text, nullable=True)
    corrected_value = Column(Text, nullable=True)
    source_url = Column(String, nullable=True)
    quote = Column(Text, nullable=True)
    user_comment = Column(Text, nullable=True)
    status = Column(String, default="PENDING", nullable=False) # PENDING, APPROVED, REJECTED
    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)

    company = relationship("Company", back_populates="reported_mistakes")


# ==============================================================================
# UTILS
# ==============================================================================

def init_db():
    Base.metadata.create_all(bind=engine)
    init_robotics_defaults()

def init_robotics_defaults():
    """Seeds the database with default robotics categories if empty."""
    db = SessionLocal()
    try:
        if db.query(RoboticsCategory).count() == 0:
            defaults = [
                {
                    "key": "cleaning",
                    "name": "Cleaning Robots",
                    "description": "Does the company manage large floors, hospitals, hotels, or public spaces? (Keywords: Hygiene, Cleaning, SPA, Facility Management)",
                    "reasoning_guide": "High (80-100): Large industrial floors, shopping malls, hospitals, airports. Medium (40-79): Mid-sized production, large offices, supermarkets. Low (0-39): Small offices, software consultancies."
                },
                {
                    "key": "transport",
                    "name": "Intralogistics / Transport",
                    "description": "Do they move goods internally? (Keywords: Warehouse, Intralogistics, Production line, Hospital logistics)",
                    "reasoning_guide": "High: Manufacturing, E-Commerce fulfillment, Hospitals. Low: Pure service providers, law firms."
                },
                {
                    "key": "security",
                    "name": "Security & Surveillance",
                    "description": "Do they have large perimeters, solar parks, wind farms, or night patrols? (Keywords: Werkschutz, Security, Monitoring)",
                    "reasoning_guide": "High: Critical infrastructure, large open-air storage, factories with valuable assets, 24/7 operations. Medium: Standard corporate HQs. Low: Offices in shared buildings."
                },
                {
                    "key": "service",
                    "name": "Service / Waiter Robots",
                    "description": "Do they operate restaurants, nursing homes, or event venues where food/items need to be served to people?",
                    "reasoning_guide": "High: Restaurants, Hotels (Room Service), Nursing Homes (Meal delivery). Low: B2B manufacturing, closed offices, pure installation services."
                }
            ]
            for d in defaults:
                db.add(RoboticsCategory(**d))
            db.commit()
            print("Seeded Robotics Categories.")
    except Exception as e:
        print(f"Error seeding robotics defaults: {e}")
    finally:
        db.close()

def get_db():
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()