import { describe, it, expect, vi, beforeEach } from "vitest";
import { getAdminPocketBase } from "@/lib/server/pocketbase-admin";
import { createCustomerQuoteFromRepair } from "@/lib/server/repairs-service";
import { createQuote } from "@/lib/server/quotes-service";

vi.mock("@/lib/server/pocketbase-admin", () => ({
  getAdminPocketBase: vi.fn(),
}));

vi.mock("@/lib/server/quotes-service", () => ({
  // Only `createQuote` is needed by the function under test.
  createQuote: vi.fn(),
}));

const REPAIRS = "repairs";

interface CollectionMock {
  getOne?: ReturnType<typeof vi.fn>;
  update?: ReturnType<typeof vi.fn>;
}

const baseRepair = {
  id: "rep1",
  repair_number: "REP-2026-09-001",
  customer: "cust1",
  company: "co1",
  order: "",
  supplier: "",
  status: "quoted",
  item_description: "Hydraulic ram",
  fault_description: "Seal leak",
  notes: "",
  serial_no: "SN-12345",
  photos: [],
  quote: ["supplier-quote.pdf"],
  purchase_order: [],
  repair_request: [],
};

function makePb(repair: typeof baseRepair & Record<string, unknown>) {
  const getOne = vi.fn().mockImplementation(async (id: string) => {
    if (id !== repair.id) {
      const err = new Error("not found") as Error & { status?: number };
      err.status = 404;
      throw err;
    }
    return repair;
  });
  const update = vi
    .fn()
    .mockImplementation(async (id: string, patch: Record<string, unknown>) => ({
      ...repair,
      id,
      ...patch,
    }));
  return {
    autoCancellation: vi.fn(),
    collection: (name: string) => {
      if (name !== REPAIRS) {
        throw new Error(`unexpected collection: ${name}`);
      }
      return { getOne, update } satisfies CollectionMock;
    },
    _getOne: getOne,
    _update: update,
  };
}

function mockAdminPb(pb: ReturnType<typeof makePb>) {
  vi.mocked(getAdminPocketBase).mockResolvedValue(
    pb as unknown as Awaited<ReturnType<typeof getAdminPocketBase>>,
  );
}

describe("createCustomerQuoteFromRepair", () => {
  beforeEach(() => vi.clearAllMocks());

  it("creates a quote from the repair context and patches the back-reference", async () => {
    const pb = makePb(baseRepair);
    mockAdminPb(pb);

    vi.mocked(createQuote).mockResolvedValue({
      quote: { id: "quote-new", quote_number: "Q-2026-09-099" } as never,
      customer: { id: "cust1", customer: "Acme Mining" } as never,
      company: { id: "co1", company: "Acme Group" } as never,
      items: [],
      quote_number: "Q-2026-09-099",
    });

    const result = await createCustomerQuoteFromRepair("rep1", {
      items: [
        {
          description: "Replace seal kit",
          quantity: 1,
          cost_price: 1200,
          markup: 25,
        },
      ],
    });

    // createQuote received the right customer/company/description and
    // did NOT get a status override (defaults to "new").
    expect(createQuote).toHaveBeenCalledWith(
      expect.objectContaining({
        customer: "cust1",
        company: "co1",
        description: "Repair of Hydraulic ram (S/N SN-12345)",
        items: [
          expect.objectContaining({ description: "Replace seal kit" }),
        ],
      }),
    );
    // No status override was passed.
    const passedStatus = vi.mocked(createQuote).mock.calls[0][0].status;
    expect(passedStatus).toBeUndefined();

    // Back-reference is patched on the repair.
    expect(pb._update).toHaveBeenCalledWith("rep1", {
      customer_quote: "quote-new",
    });

    // Return payload surfaces the new quote + refreshed repair.
    expect(result.quote.id).toBe("quote-new");
    expect(result.customer.id).toBe("cust1");
    expect(result.repair.customer_quote).toBe("quote-new");
  });

  it("omits the serial-number suffix when serial_no is empty", async () => {
    const pb = makePb({ ...baseRepair, serial_no: "" });
    mockAdminPb(pb);
    vi.mocked(createQuote).mockResolvedValue({
      quote: { id: "quote-new" } as never,
      customer: { id: "cust1" } as never,
      company: null,
      items: [],
      quote_number: "Q-x",
    });

    await createCustomerQuoteFromRepair("rep1", {
      items: [{ description: "Strip & quote" }],
    });

    const description = vi.mocked(createQuote).mock.calls[0][0].description;
    expect(description).toBe("Repair of Hydraulic ram");
    expect(description).not.toMatch(/S\/N/);
  });

  it("respects an operator-supplied description override", async () => {
    const pb = makePb(baseRepair);
    mockAdminPb(pb);
    vi.mocked(createQuote).mockResolvedValue({
      quote: { id: "quote-new" } as never,
      customer: { id: "cust1" } as never,
      company: null,
      items: [],
      quote_number: "Q-x",
    });

    await createCustomerQuoteFromRepair("rep1", {
      items: [{ description: "x" }],
      description: "Custom subject for the email",
    });

    expect(vi.mocked(createQuote).mock.calls[0][0].description).toBe(
      "Custom subject for the email",
    );
  });

  it("forwards quote_notes and validity_days when supplied", async () => {
    const pb = makePb(baseRepair);
    mockAdminPb(pb);
    vi.mocked(createQuote).mockResolvedValue({
      quote: { id: "quote-new" } as never,
      customer: { id: "cust1" } as never,
      company: null,
      items: [],
      quote_number: "Q-x",
    });

    await createCustomerQuoteFromRepair("rep1", {
      items: [{ description: "x" }],
      quote_notes: "Includes collection + return",
      validity_days: 14,
    });

    const passed = vi.mocked(createQuote).mock.calls[0][0];
    expect(passed.quote_notes).toBe("Includes collection + return");
    expect(passed.validity_days).toBe(14);
  });

  it("rejects when the repair has no customer", async () => {
    const pb = makePb({ ...baseRepair, customer: "" });
    mockAdminPb(pb);
    vi.mocked(createQuote).mockResolvedValue({
      quote: { id: "x" } as never,
      customer: { id: "x" } as never,
      company: null,
      items: [],
      quote_number: "x",
    });

    await expect(
      createCustomerQuoteFromRepair("rep1", {
        items: [{ description: "x" }],
      }),
    ).rejects.toThrow(/no customer set/);

    // Did not call createQuote, did not patch the repair.
    expect(createQuote).not.toHaveBeenCalled();
    expect(pb._update).not.toHaveBeenCalled();
  });

  it("rejects when an existing customer_quote link is set and replace is not", async () => {
    const pb = makePb({ ...baseRepair, customer_quote: "quote-old" });
    mockAdminPb(pb);
    vi.mocked(createQuote).mockResolvedValue({
      quote: { id: "x" } as never,
      customer: { id: "x" } as never,
      company: null,
      items: [],
      quote_number: "x",
    });

    await expect(
      createCustomerQuoteFromRepair("rep1", {
        items: [{ description: "x" }],
      }),
    ).rejects.toThrow(/already has a customer quote/);
    expect(createQuote).not.toHaveBeenCalled();
  });

  it("allows overwriting the back-reference when replace=true", async () => {
    const pb = makePb({ ...baseRepair, customer_quote: "quote-old" });
    mockAdminPb(pb);
    vi.mocked(createQuote).mockResolvedValue({
      quote: { id: "quote-new" } as never,
      customer: { id: "cust1" } as never,
      company: null,
      items: [],
      quote_number: "Q-new",
    });

    const result = await createCustomerQuoteFromRepair("rep1", {
      items: [{ description: "x" }],
      replace: true,
    });

    expect(pb._update).toHaveBeenCalledWith("rep1", {
      customer_quote: "quote-new",
    });
    expect(result.repair.customer_quote).toBe("quote-new");
  });

  it("rejects when items is empty", async () => {
    const pb = makePb(baseRepair);
    mockAdminPb(pb);

    await expect(
      createCustomerQuoteFromRepair("rep1", { items: [] }),
    ).rejects.toThrow(/items must be a non-empty array/);
  });
});