#!/usr/bin/env python3
"""Seed the sample supplier, import its catalog, price + publish valid products.

Idempotent: safe to re-run — supplier/catalog are upserted, prices recalculated.

Usage:  python3 scripts/seed.py
"""
import os
import sys

# allow running from repo root or scripts/
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

from decimal import ROUND_HALF_UP, Decimal

from app.database import SessionLocal
from app.engines.importer import import_feed
from app.engines.pricing import calculate_price
from app.engines.suppliers.base import build_adapter
from app.models import (
    AuditLog,
    PriceHistory,
    Supplier,
    SupplierPerformance,
    SupplierProduct,
)

SAMPLE_NAME = "Meridian Distribution"


def ensure_supplier(db):
    supplier = db.query(Supplier).filter(Supplier.name == SAMPLE_NAME).first()
    if supplier is None:
        supplier = Supplier(
            name=SAMPLE_NAME,
            adapter_type="sample",
            shipping_regions=["US", "CA"],
            reliability_score=92.0,
            status="active",
        )
        db.add(supplier)
        db.flush()
        print(f"[seed] created supplier {supplier.id}")
    else:
        supplier.status = "active"
        print(f"[seed] supplier already exists: {supplier.id}")
    return supplier


def ensure_performance(db, supplier):
    if db.query(SupplierPerformance).filter(SupplierPerformance.supplier_id == supplier.id).first() is None:
        db.add(
            SupplierPerformance(
                supplier_id=supplier.id,
                fulfillment_rate=98.0,
                avg_shipping_days=4.0,
                cancellation_rate=1.0,
                stock_accuracy=97.0,
                return_rate=2.0,
            )
        )
        db.flush()


def price_and_publish(db, supplier):
    """Price every linked product via the pricing engine; publish valid ones.

    NEVER publish invalid: products that fail rule lookup or end up with a
    non-positive retail price stay un-published.
    """
    links = (
        db.query(SupplierProduct)
        .filter(SupplierProduct.supplier_id == supplier.id)
        .all()
    )
    published = 0
    skipped = []
    for sp in links:
        product = sp.product
        if product is None:
            continue
        quote = calculate_price(
            db,
            product.cost,
            shipping=sp.shipping_cost or 0,
            fees=0,
            min_price=product.min_price,
        )
        if quote is None:
            skipped.append({"sku": product.sku, "reason": "no active price rule"})
            continue
        if quote["retail"] <= 0:
            skipped.append({"sku": product.sku, "reason": "non-positive retail"})
            continue

        product.retail_price = quote["retail"]
        product.min_price = (quote["retail"] * Decimal("0.90")).quantize(
            Decimal("0.01"), rounding=ROUND_HALF_UP
        )
        product.max_price = (quote["retail"] * Decimal("1.15")).quantize(
            Decimal("0.01"), rounding=ROUND_HALF_UP
        )
        product.status = "price_calculated"
        db.add(PriceHistory(product_id=product.id, price=quote["retail"], reason="auto"))

        # published only when priced
        product.status = "published"
        published += 1
        db.add(
            AuditLog(
                actor="seed",
                action="product_published",
                entity="product",
                entity_id=str(product.id),
                detail={"sku": product.sku, "retail_price": float(quote["retail"])},
            )
        )

    db.commit()
    print(f"[seed] priced + published {published} products; skipped: {skipped}")


def main():
    db = SessionLocal()
    try:
        supplier = ensure_supplier(db)
        db.commit()
        ensure_performance(db, supplier)
        db.commit()

        summary = import_feed(db, supplier, feed_type="sample", data_or_url="")
        print(
            f"[seed] import: received={summary['received']} "
            f"imported={summary['imported']} updated={summary['updated']} "
            f"skipped={len(summary['skipped'])}"
        )
        if summary["skipped"]:
            print(f"[seed] skipped details: {summary['skipped']}")

        price_and_publish(db, supplier)

        # quick self-check on a known item ($80-ish cost band)
        probe = db.query(SupplierProduct).filter(
            SupplierProduct.supplier_id == supplier.id,
            SupplierProduct.supplier_sku == "SPL-1006",
        ).first()
        if probe and probe.product:
            p = probe.product
            print(
                f"[seed] sanity: {p.sku} cost={p.cost} retail={p.retail_price} "
                f"status={p.status}"
            )
        print("[seed] done")
    finally:
        db.close()


if __name__ == "__main__":
    main()