"""Author RAG — Pricing Plan Model.

Stores all subscription plan definitions in the database.
SuperAdmin manages these via the admin panel — no code deployment
needed to change prices, limits, or Stripe Price IDs.

Plans are fetched by the public billing API and displayed on the
Next.js marketing website's Pricing section dynamically.
"""

import json

from sqlalchemy import Boolean, Float, Integer, String, Text
from sqlalchemy.orm import Mapped, mapped_column

from app.models.base import Base, TimestampMixin


class PricingPlan(Base, TimestampMixin):
    """A subscription plan — prices and limits configurable by SuperAdmin."""

    __tablename__ = "pricing_plans"

    # ── Identity ──────────────────────────────────────────────────────────────
    id: Mapped[str] = mapped_column(
        String(50), primary_key=True
    )  # e.g. "starter" | "agency" | "enterprise"
    display_name: Mapped[str] = mapped_column(
        String(100), nullable=False
    )  # Shown on pricing page

    # ── Pricing ───────────────────────────────────────────────────────────────
    monthly_price_usd: Mapped[float] = mapped_column(Float, nullable=False, default=0.0)
    annual_price_usd: Mapped[float] = mapped_column(
        Float, nullable=False, default=0.0
    )  # Per-month cost when billed annually

    # ── Stripe ────────────────────────────────────────────────────────────────
    # Paste the Stripe Price IDs from your Stripe Dashboard here via SuperAdmin panel.
    # Test mode Price IDs start with price_test_*, live with price_*.
    stripe_price_id_monthly: Mapped[str | None] = mapped_column(String(255), nullable=True)
    stripe_price_id_annual: Mapped[str | None] = mapped_column(String(255), nullable=True)

    # ── Usage Limits ──────────────────────────────────────────────────────────
    # -1 means unlimited
    max_books: Mapped[int] = mapped_column(Integer, nullable=False, default=5)
    max_chats_per_month: Mapped[int] = mapped_column(Integer, nullable=False, default=2000)
    max_token_budget: Mapped[int] = mapped_column(Integer, nullable=False, default=500_000)
    max_embeds: Mapped[int] = mapped_column(Integer, nullable=False, default=1)

    # ── Feature Flags ─────────────────────────────────────────────────────────
    has_analytics: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
    has_ab_testing: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
    has_white_label: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
    has_api_access: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
    has_webhooks: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
    has_custom_domain: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
    has_priority_support: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)

    # ── Display Config ────────────────────────────────────────────────────────
    # JSON list of feature strings shown on the pricing page:
    # e.g. '["5 books", "2,000 chats/month", "Email support"]'
    features_json: Mapped[str] = mapped_column(Text, nullable=False, default="[]")

    is_active: Mapped[bool] = mapped_column(
        Boolean, default=True, nullable=False
    )  # False = hidden from pricing page
    is_popular: Mapped[bool] = mapped_column(
        Boolean, default=False, nullable=False
    )  # Shows "Most Popular" badge
    sort_order: Mapped[int] = mapped_column(
        Integer, default=0, nullable=False
    )  # Display order on pricing cards

    # ── Overage Pricing ───────────────────────────────────────────────────────
    # Charge per 1K tokens beyond monthly budget (rather than hard cut-off)
    overage_price_per_1k_tokens: Mapped[float] = mapped_column(
        Float, nullable=False, default=0.003
    )

    @property
    def features(self) -> list[str]:
        """Parse the features JSON list for display."""
        try:
            return json.loads(self.features_json)
        except (json.JSONDecodeError, TypeError):
            return []

    @features.setter
    def features(self, value: list[str]) -> None:
        self.features_json = json.dumps(value)

    def to_public_dict(self, billing: str = "monthly") -> dict:
        """Serialize plan for the public pricing API (consumed by Next.js website)."""
        price = self.monthly_price_usd if billing == "monthly" else self.annual_price_usd
        stripe_id = (
            self.stripe_price_id_monthly
            if billing == "monthly"
            else self.stripe_price_id_annual
        )
        return {
            "id": self.id,
            "name": self.display_name,
            "price": price,
            "billing": billing,
            "stripe_price_id": stripe_id,
            "limits": {
                "max_books": self.max_books,
                "max_chats_per_month": self.max_chats_per_month,
                "max_token_budget": self.max_token_budget,
                "max_embeds": self.max_embeds,
            },
            "features": self.features,
            "is_popular": self.is_popular,
            "overage_price_per_1k_tokens": self.overage_price_per_1k_tokens,
        }

    def __repr__(self) -> str:
        return f"<PricingPlan id={self.id} monthly=${self.monthly_price_usd}>"