import { describe, expect, it, vi } from 'vitest';

import { MemberWorkSyncTaskImpactResolver } from '@features/member-work-sync/main/adapters/input/MemberWorkSyncTaskImpactResolver';

import type { TeamTask } from '@shared/types';

describe('MemberWorkSyncTaskImpactResolver', () => {
  it('targets owner, reviewer, dependent owners and lead oversight without team-wide fan-out', async () => {
    const tasks: TeamTask[] = [
      {
        id: 'task-a',
        displayId: '#11111111',
        subject: 'Changed',
        status: 'in_progress',
        owner: 'alice',
        reviewState: 'review',
        historyEvents: [
          {
            id: 'evt-review',
            type: 'review_requested',
            timestamp: '2026-04-29T00:00:00.000Z',
            from: 'none',
            to: 'review',
            reviewer: 'bob',
          },
        ],
      },
      {
        id: 'task-b',
        subject: 'Unblocked by A',
        status: 'pending',
        owner: 'tom',
        blockedBy: ['task-a'],
      },
    ];
    const resolver = new MemberWorkSyncTaskImpactResolver({
      taskReader: { getTasks: vi.fn(async () => tasks) },
      kanbanManager: { getState: vi.fn(async () => ({ tasks: {} })) },
      activeMemberSource: {
        loadActiveMemberNames: vi.fn(async () => ['alice', 'bob', 'team-lead', 'tom']),
      },
    } as never);

    await expect(resolver.resolve({ teamName: 'team-a', taskId: '#11111111' })).resolves.toEqual({
      memberNames: ['alice', 'bob', 'tom'],
      fallbackTeamWide: false,
      diagnostics: [],
    });
  });

  it('falls back to team-wide routing when a task was removed before impact can be resolved', async () => {
    const resolver = new MemberWorkSyncTaskImpactResolver({
      taskReader: { getTasks: vi.fn(async () => []) },
      kanbanManager: { getState: vi.fn(async () => ({ tasks: {} })) },
      activeMemberSource: { loadActiveMemberNames: vi.fn(async () => ['alice']) },
    } as never);

    await expect(resolver.resolve({ teamName: 'team-a', taskId: 'deleted-task' })).resolves.toEqual(
      {
        memberNames: [],
        fallbackTeamWide: true,
        diagnostics: ['task_not_found'],
      }
    );
  });

  it('targets lead when a deleted task breaks active dependent work', async () => {
    const tasks: TeamTask[] = [
      {
        id: 'task-deleted',
        subject: 'Deleted dependency',
        status: 'deleted',
        owner: 'alice',
        deletedAt: '2026-04-29T00:00:00.000Z',
      },
      {
        id: 'task-dependent',
        subject: 'Depends on deleted task',
        status: 'pending',
        owner: 'tom',
        blockedBy: ['task-deleted'],
      },
    ];
    const resolver = new MemberWorkSyncTaskImpactResolver({
      taskReader: { getTasks: vi.fn(async () => tasks) },
      kanbanManager: { getState: vi.fn(async () => ({ tasks: {} })) },
      activeMemberSource: {
        loadActiveMemberNames: vi.fn(async () => ['alice', 'team-lead', 'tom']),
      },
    } as never);

    await expect(resolver.resolve({ teamName: 'team-a', taskId: 'task-deleted' })).resolves.toEqual(
      {
        memberNames: ['alice', 'team-lead', 'tom'],
        fallbackTeamWide: false,
        diagnostics: ['dependent_task_has_deleted_dependency'],
      }
    );
  });

  it('targets dependent owners when dependencies reference the changed task by display id', async () => {
    const tasks: TeamTask[] = [
      {
        id: 'task-a',
        displayId: '#11111111',
        subject: 'Changed dependency',
        status: 'in_progress',
        owner: 'alice',
      },
      {
        id: 'task-b',
        subject: 'Depends on display id',
        status: 'pending',
        owner: 'tom',
        blockedBy: ['11111111'],
      },
    ];
    const resolver = new MemberWorkSyncTaskImpactResolver({
      taskReader: { getTasks: vi.fn(async () => tasks) },
      kanbanManager: { getState: vi.fn(async () => ({ tasks: {} })) },
      activeMemberSource: {
        loadActiveMemberNames: vi.fn(async () => ['alice', 'team-lead', 'tom']),
      },
    } as never);

    await expect(resolver.resolve({ teamName: 'team-a', taskId: 'task-a' })).resolves.toEqual({
      memberNames: ['alice', 'tom'],
      fallbackTeamWide: false,
      diagnostics: [],
    });
  });
});