"use server";

import { db } from "@/db";
import { quotes, quote_items, clients, offer_micros, offer_phases } from "@/db/schema";
import { createQuoteSchema } from "@/lib/quote-validators";
import { eq } from "drizzle-orm";
import { nanoid } from "nanoid";

// Fetch offer with all phases and services for preview
export async function getOfferWithPhases(offerMicroId: string) {
  const [micro] = await db
    .select()
    .from(offer_micros)
    .where(eq(offer_micros.id, offerMicroId))
    .limit(1);

  if (!micro) return null;

  const phases = await db
    .select()
    .from(offer_phases)
    .where(eq(offer_phases.micro_id, offerMicroId));

  return {
    ...micro,
    phases,
  };
}

// Server action: create quote with validation
export async function createQuote(input: unknown) {
  try {
    // Validate input
    const validated = createQuoteSchema.parse(input);

    // Verify client exists
    const [client] = await db
      .select()
      .from(clients)
      .where(eq(clients.id, validated.client_id))
      .limit(1);

    if (!client) {
      return {
        success: false,
        error: "Cliente non trovato",
      };
    }

    // Verify offer exists
    const [offer] = await db
      .select()
      .from(offer_micros)
      .where(eq(offer_micros.id, validated.offer_micro_id))
      .limit(1);

    if (!offer) {
      return {
        success: false,
        error: "Offerta non trovata",
      };
    }

    // Generate unique token (nanoid 21 chars = ~122 bits entropy)
    const token = nanoid(21);

    // Convert accepted_total to numeric for DB storage
    const totalAmount = parseFloat(validated.accepted_total);

    // Create quote (atomic transaction)
    const [insertedQuote] = await db
      .insert(quotes)
      .values({
        client_id: validated.client_id,
        offer_micro_id: validated.offer_micro_id,
        token,
        state: "draft",
        accepted_total: totalAmount.toString(),
      })
      .returning();

    if (!insertedQuote) {
      return {
        success: false,
        error: "Errore nel salvataggio del preventivo",
      };
    }

    // Return success with public link
    const publicLink = `/quote/${token}`;

    return {
      success: true as const,
      quote: insertedQuote,
      token: token as string,
      publicLink: publicLink as string,
    };
  } catch (error) {
    const message = error instanceof Error ? error.message : "Errore sconosciuto";

    // Check if it's a Zod validation error
    if (message.includes("validation")) {
      return {
        success: false,
        error: "Dati non validi. Controlla i campi obbligatori.",
      };
    }

    return {
      success: false,
      error: message,
    };
  }
}