/**
 * Phase 5a — claim event recording tests.
 *
 * Follows the same injectable-parameter pattern as closeTransition.test.js:
 *   _TicketModel  — controls the DB layer (updateOne)
 *   _recordAction — captures recording calls without any module mocking
 *
 * No vi.mock needed; all dependencies injected directly.
 *
 * Covers:
 *   (a) fresh claim          — modifiedCount 1 → exactly one 'claim' event
 *   (b) no-op re-claim       — modifiedCount 0 (same user) → no event
 *   (c) conditional filter   — filter must exclude tickets already claimed by actor
 *   (d) tier captured        — escalationTier from ticket at claim time
 */
import { describe, it, expect, vi } from 'vitest';

import { applyClaim } from '../handlers/buttons.js';

// ---------------------------------------------------------------------------
// Shared factories
// ---------------------------------------------------------------------------

function makeInteraction(userId = 'staff-001') {
  return {
    user: {
      id: userId,
      username: 'staffuser',
      toString: () => `<@${userId}>`
    },
    member: { displayName: 'Staff Member' },
    guild: { id: 'guild-001' },
    channel: { id: 'chan-001' },
    update: vi.fn().mockResolvedValue(undefined),
    followUp: vi.fn().mockResolvedValue(undefined)
  };
}

function makeGuild() {
  return {
    members: {
      fetch: vi.fn().mockRejectedValue(new Error('no member in test env'))
    }
  };
}

function makeTicket(overrides = {}) {
  return {
    gmailThreadId:  'discord-test-001',
    escalationTier: 0,
    claimerId:      null,
    claimedBy:      null,
    priority:       'normal',
    game:           'TestGame',
    senderEmail:    'user@example.com',
    creatorId:      'creator-001',
    ticketNumber:   42,
    ...overrides
  };
}

function makeBtn() {
  const btn = {};
  const chain = () => btn;
  btn.setCustomId  = chain;
  btn.setLabel     = chain;
  btn.setEmoji     = chain;
  btn.setStyle     = chain;
  btn.setDisabled  = chain;
  return btn;
}

// ---------------------------------------------------------------------------
// (a) Fresh claim — real transition
// ---------------------------------------------------------------------------

describe('applyClaim — fresh claim emits one event', () => {
  it('emits exactly one "claim" event with the correct staffId', async () => {
    const ticket = makeTicket({ escalationTier: 0, claimerId: null });
    const mockUpdateOne = vi.fn().mockResolvedValue({ modifiedCount: 1 });
    const mockRecord    = vi.fn();
    const interaction   = makeInteraction('staff-001');

    await applyClaim(interaction, ticket, {}, makeBtn(), makeBtn(), 'Staff Member', makeGuild(), { updateOne: mockUpdateOne }, mockRecord);

    expect(mockRecord).toHaveBeenCalledTimes(1);
    const [staffId, type] = mockRecord.mock.calls[0];
    expect(staffId).toBe('staff-001');
    expect(type).toBe('claim');
  });

  it('passes the ticket doc so the recorder can denormalize fields', async () => {
    const ticket = makeTicket({ escalationTier: 0, claimerId: null });
    const mockUpdateOne = vi.fn().mockResolvedValue({ modifiedCount: 1 });
    const mockRecord    = vi.fn();
    const interaction   = makeInteraction('staff-001');

    await applyClaim(interaction, ticket, {}, makeBtn(), makeBtn(), 'Staff Member', makeGuild(), { updateOne: mockUpdateOne }, mockRecord);

    const [, , payload] = mockRecord.mock.calls[0];
    expect(payload.ticket).toBe(ticket);
    expect(payload.guildId).toBe('guild-001');
  });
});

// ---------------------------------------------------------------------------
// (b) No-op re-claim — same user double-click, modifiedCount 0
// ---------------------------------------------------------------------------

describe('applyClaim — no-op re-claim emits no event', () => {
  it('emits no event when modifiedCount is 0', async () => {
    const ticket = makeTicket({ escalationTier: 0, claimerId: 'staff-001' });
    const mockUpdateOne = vi.fn().mockResolvedValue({ modifiedCount: 0 });
    const mockRecord    = vi.fn();
    const interaction   = makeInteraction('staff-001');

    await applyClaim(interaction, ticket, {}, makeBtn(), makeBtn(), 'Staff Member', makeGuild(), { updateOne: mockUpdateOne }, mockRecord);

    expect(mockRecord).not.toHaveBeenCalled();
  });
});

// ---------------------------------------------------------------------------
// (c) Conditional filter — DB write must exclude same-user claims
// ---------------------------------------------------------------------------

describe('applyClaim — conditional filter', () => {
  it('includes claimerId $ne the acting user in the updateOne filter', async () => {
    const ticket = makeTicket({ claimerId: null });
    const mockUpdateOne = vi.fn().mockResolvedValue({ modifiedCount: 0 });
    const interaction   = makeInteraction('staff-001');

    await applyClaim(interaction, ticket, {}, makeBtn(), makeBtn(), 'Staff Member', makeGuild(), { updateOne: mockUpdateOne }, vi.fn());

    const [filter] = mockUpdateOne.mock.calls[0];
    expect(filter).toMatchObject({
      gmailThreadId: 'discord-test-001',
      claimerId: { $ne: 'staff-001' }
    });
  });
});

// ---------------------------------------------------------------------------
// (d) Tier captured at claim time
// ---------------------------------------------------------------------------

describe('applyClaim — tier captured at claim time', () => {
  it('passes the ticket with escalationTier=1 when the ticket is escalated', async () => {
    const ticket = makeTicket({ escalationTier: 1, claimerId: null });
    const mockUpdateOne = vi.fn().mockResolvedValue({ modifiedCount: 1 });
    const mockRecord    = vi.fn();
    const interaction   = makeInteraction('staff-001');

    await applyClaim(interaction, ticket, {}, makeBtn(), makeBtn(), 'Staff Member', makeGuild(), { updateOne: mockUpdateOne }, mockRecord);

    const [, , payload] = mockRecord.mock.calls[0];
    expect(payload.ticket.escalationTier).toBe(1);
  });

  it('passes the ticket with escalationTier=0 for a non-escalated ticket', async () => {
    const ticket = makeTicket({ escalationTier: 0, claimerId: null });
    const mockUpdateOne = vi.fn().mockResolvedValue({ modifiedCount: 1 });
    const mockRecord    = vi.fn();
    const interaction   = makeInteraction('staff-001');

    await applyClaim(interaction, ticket, {}, makeBtn(), makeBtn(), 'Staff Member', makeGuild(), { updateOne: mockUpdateOne }, mockRecord);

    const [, , payload] = mockRecord.mock.calls[0];
    expect(payload.ticket.escalationTier).toBe(0);
  });
});