import { describe, it, expect, vi, beforeEach } from "vitest";

// Unmock keys service — we want to test the real implementation
vi.unmock("../services/keys.js");

// DB is still mocked by setup.ts
import { queryWithRetry } from "../services/db.js";

describe("keys service", () => {
  let keys: typeof import("../services/keys.js");

  beforeEach(async () => {
    vi.clearAllMocks();
    vi.resetModules();
    // Re-import to get fresh cache
    keys = await import("../services/keys.js");
  });

  describe("after loadKeys", () => {
    const mockRows = [
      { key: "df_free_abc", tier: "free", email: "a@b.com", created_at: "2025-01-01T00:00:00Z", stripe_customer_id: null },
      { key: "df_pro_xyz", tier: "pro", email: "pro@b.com", created_at: "2025-01-01T00:00:00Z", stripe_customer_id: "cus_123" },
    ];

    beforeEach(async () => {
      vi.mocked(queryWithRetry).mockResolvedValueOnce({ rows: mockRows, rowCount: 2 } as any);
      await keys.loadKeys();
    });

    it("isValidKey returns true for cached keys", () => {
      expect(keys.isValidKey("df_free_abc")).toBe(true);
      expect(keys.isValidKey("df_pro_xyz")).toBe(true);
    });

    it("isValidKey returns false for unknown keys", () => {
      expect(keys.isValidKey("unknown")).toBe(false);
    });

    it("isProKey returns true for pro tier, false for free", () => {
      expect(keys.isProKey("df_pro_xyz")).toBe(true);
      expect(keys.isProKey("df_free_abc")).toBe(false);
    });

    it("getKeyInfo returns correct ApiKey object", () => {
      const info = keys.getKeyInfo("df_pro_xyz");
      expect(info).toEqual({
        key: "df_pro_xyz",
        tier: "pro",
        email: "pro@b.com",
        createdAt: "2025-01-01T00:00:00Z",
        stripeCustomerId: "cus_123",
      });
    });

    it("getKeyInfo returns undefined for unknown key", () => {
      expect(keys.getKeyInfo("nope")).toBeUndefined();
    });
  });

  describe("createFreeKey", () => {
    beforeEach(async () => {
      vi.mocked(queryWithRetry).mockResolvedValueOnce({ rows: [], rowCount: 0 } as any);
      await keys.loadKeys();
    });

    it("creates key with df_free prefix", async () => {
      vi.mocked(queryWithRetry).mockResolvedValueOnce({ rows: [], rowCount: 1 } as any);
      const result = await keys.createFreeKey("new@test.com");
      expect(result.key).toMatch(/^df_free_/);
      expect(result.tier).toBe("free");
      expect(result.email).toBe("new@test.com");
    });

    it("returns existing key for same email", async () => {
      vi.mocked(queryWithRetry).mockResolvedValueOnce({ rows: [], rowCount: 1 } as any);
      const first = await keys.createFreeKey("dup@test.com");
      const second = await keys.createFreeKey("dup@test.com");
      expect(second.key).toBe(first.key);
    });
  });

  describe("createProKey", () => {
    beforeEach(async () => {
      vi.mocked(queryWithRetry).mockResolvedValueOnce({ rows: [], rowCount: 0 } as any);
      await keys.loadKeys();
    });

    it("uses UPSERT and returns key", async () => {
      const returnedRow = {
        key: "df_pro_newkey",
        tier: "pro",
        email: "pro@test.com",
        created_at: "2025-06-01T00:00:00Z",
        stripe_customer_id: "cus_new",
      };
      vi.mocked(queryWithRetry).mockResolvedValueOnce({ rows: [returnedRow], rowCount: 1 } as any);
      
      const result = await keys.createProKey("pro@test.com", "cus_new");
      expect(result.tier).toBe("pro");
      expect(result.stripeCustomerId).toBe("cus_new");
      
      const call = vi.mocked(queryWithRetry).mock.calls.find(
        (c) => typeof c[0] === "string" && c[0].includes("ON CONFLICT")
      );
      expect(call).toBeTruthy();
    });
  });
});