import "server-only";
import { serverAuth } from "./pb";
import { requireUser } from "./auth";
import type { Asset, CostLine, FinancingTerm, InsuranceRate, Mechanic, OilItem, OilMovement, Operator, MonthlyIncome, MonthlyRunningCost, Overhead, Invoice, InvoiceLine, Site } from "./data";
export * from "./data";

async function dataPB() {
  await requireUser();
  return serverAuth();
}

export async function getAssets(): Promise<Asset[]> {
  const pb = await dataPB();
  return pb.collection("assets").getFullList<Asset>({ sort: "category,name" });
}

export async function getAssetsByCategory(category: string): Promise<Asset[]> {
  const all = await getAssets();
  return all.filter((a) => a.category === category);
}

export async function getMonthlyIncome(year = 2026): Promise<MonthlyIncome[]> {
  const pb = await dataPB();
  return pb.collection("monthly_income").getFullList<MonthlyIncome>({
    filter: `year = ${year}`,
    sort: "month",
  });
}

// Part 1.2: YTD aggregations operate on actuals only by default.
// `is_forecast` is a boolean field on monthly_income; rows where it's true are excluded.
export async function getActualMonthlyIncome(year = 2026): Promise<MonthlyIncome[]> {
  const all = await getMonthlyIncome(year);
  return all.filter((r) => !(r as any).is_forecast);
}

export async function getRunningCosts(year = 2026): Promise<MonthlyRunningCost[]> {
  const pb = await dataPB();
  return pb.collection("monthly_running_costs").getFullList<MonthlyRunningCost>({
    filter: `year = ${year}`,
    sort: "month",
  });
}

// Per-machine, per-month cost lines by kind — `insurance`, `instalment`,
// `tracking`. This is a DIFFERENT collection from `monthly_running_costs`: the
// running-cost rows are repairs & parts, while these are the fixed per-machine
// charges the workbook splits out by term. Keep them apart or the /running
// Overview total silently swallows an insurance figure it never showed.
export async function getCostLines(kind?: string, year = 2026): Promise<CostLine[]> {
  const pb = await dataPB();
  const filters = [`year = ${year}`];
  if (kind) filters.push(`kind = "${kind}"`);
  return pb.collection("cost_lines").getFullList<CostLine>({
    filter: filters.join(" && "),
    sort: "month",
  });
}

/**
 * Insurance rate periods. The source of truth for a plant vehicle's premium —
 * `cost_lines` insurance rows are DERIVED from these, not the other way round.
 */
export async function getInsuranceRates(year = 2026): Promise<InsuranceRate[]> {
  const pb = await dataPB();
  return pb.collection("insurance_rates").getFullList<InsuranceRate>({
    filter: `year = ${year}`,
    sort: "month_from",
  });
}

export async function getFinancingTerms(): Promise<FinancingTerm[]> {
  const pb = await dataPB();
  return pb.collection("financing_terms").getFullList<FinancingTerm>({ sort: "installment" });
}

export async function getOperators(): Promise<Operator[]> {
  const pb = await dataPB();
  return pb.collection("operators").getFullList<Operator>({ sort: "name" });
}

export async function getMechanics(): Promise<Mechanic[]> {
  const pb = await dataPB();
  return pb.collection("mechanics").getFullList<Mechanic>({ sort: "name" });
}

export async function getOilItems(): Promise<OilItem[]> {
  const pb = await dataPB();
  return pb.collection("oil_items").getFullList<OilItem>({ sort: "code" });
}

export async function getOilMovements(): Promise<OilMovement[]> {
  const pb = await dataPB();
  return pb.collection("oil_stock_movements").getFullList<OilMovement>({ sort: "-created" });
}

export async function getOverheads(): Promise<Overhead[]> {
  const pb = await dataPB();
  return pb.collection("overheads").getFullList<Overhead>({ sort: "section,description" });
}

export async function getOverheadsBySection(section: string): Promise<Overhead[]> {
  const all = await getOverheads();
  return all.filter((o) => o.section === section);
}

export async function getInvoices(): Promise<Invoice[]> {
  const pb = await dataPB();
  return pb.collection("invoices").getFullList<Invoice>({ sort: "-invoice_date,-invoice_no" });
}

export async function getInvoiceLines(invoiceId?: string): Promise<InvoiceLine[]> {
  const pb = await dataPB();
  return pb.collection("invoice_lines").getFullList<InvoiceLine>({
    filter: invoiceId ? `invoice = "${invoiceId}"` : "",
    sort: "line_no",
  });
}

export async function getSites(): Promise<Site[]> {
  const pb = await dataPB();
  return pb.collection("sites").getFullList<Site>({ sort: "name" });
}