import { describe, it, expect, beforeEach } from 'vitest';
import { appRouter } from './index';

describe('revisionsRouter', () => {
  const ctx = { userId: '123e4567-e89b-12d3-a456-426614174000' };

  describe('createRevision', () => {
    it('should create a revision with version 1', async () => {
      const result = await appRouter.revisions.createRevision.mutate({
        input: {
          scriptId: 1,
          title: 'Initial draft',
          content: 'FADE IN:\n\nINT. ROOM - DAY',
          authorId: 1,
        },
        ctx,
      });

      expect(result.versionNumber).toBe(1);
      expect(result.branchName).toBe('main');
      expect(result.status).toBe('draft');
    });

    it('should increment version number for same script', async () => {
      await appRouter.revisions.createRevision.mutate({
        input: { scriptId: 1, title: 'v1', content: 'content1', authorId: 1 },
        ctx,
      });

      const result = await appRouter.revisions.createRevision.mutate({
        input: { scriptId: 1, title: 'v2', content: 'content2', authorId: 1 },
        ctx,
      });

      expect(result.versionNumber).toBe(2);
    });

    it('should support custom branch', async () => {
      const result = await appRouter.revisions.createRevision.mutate({
        input: {
          scriptId: 1,
          title: 'Branch revision',
          content: 'branch content',
          branchName: 'feature-act2',
          authorId: 1,
        },
        ctx,
      });

      expect(result.branchName).toBe('feature-act2');
    });
  });

  describe('listRevisions', () => {
    it('should return empty array for unknown script', async () => {
      const result = await appRouter.revisions.listRevisions.query({
        input: { scriptId: 999 },
        ctx,
      });
      expect(result).toEqual([]);
    });

    it('should filter by branch', async () => {
      await appRouter.revisions.createRevision.mutate({
        input: { scriptId: 1, title: 'main v1', content: 'main', branchName: 'main', authorId: 1 },
        ctx,
      });

      await appRouter.revisions.createRevision.mutate({
        input: { scriptId: 1, title: 'feature v1', content: 'feature', branchName: 'feature', authorId: 1 },
        ctx,
      });

      const mainRevisions = await appRouter.revisions.listRevisions.query({
        input: { scriptId: 1, branchName: 'main' },
        ctx,
      });

      expect(mainRevisions).toHaveLength(1);
      expect(mainRevisions[0]!.branchName).toBe('main');
    });
  });

  describe('acceptRevision', () => {
    it('should accept a revision', async () => {
      const created = await appRouter.revisions.createRevision.mutate({
        input: { scriptId: 1, title: 'To accept', content: 'content', authorId: 1 },
        ctx,
      });

      const result = await appRouter.revisions.acceptRevision.mutate({
        input: { revisionId: created.id, reviewedById: 2 },
        ctx,
      });

      expect(result.status).toBe('accepted');
      expect(result.reviewedById).toBe(2);
      expect(result.reviewedAt).toBeDefined();
    });
  });

  describe('rejectRevision', () => {
    it('should reject a revision with reason', async () => {
      const created = await appRouter.revisions.createRevision.mutate({
        input: { scriptId: 1, title: 'To reject', content: 'content', authorId: 1 },
        ctx,
      });

      const result = await appRouter.revisions.rejectRevision.mutate({
        input: { revisionId: created.id, reviewedById: 2, reason: 'Needs more work on dialogue' },
        ctx,
      });

      expect(result.status).toBe('rejected');
      expect(result.summary).toContain('Needs more work on dialogue');
    });
  });

  describe('rollbackToRevision', () => {
    it('should create a new revision with old content', async () => {
      const original = await appRouter.revisions.createRevision.mutate({
        input: { scriptId: 1, title: 'Original', content: 'original content', authorId: 1 },
        ctx,
      });

      await appRouter.revisions.createRevision.mutate({
        input: { scriptId: 1, title: 'Changed', content: 'changed content', authorId: 1 },
        ctx,
      });

      const rollback = await appRouter.revisions.rollbackToRevision.mutate({
        input: { scriptId: 1, revisionId: original.id, authorId: 1 },
        ctx,
      });

      expect(rollback.content).toBe('original content');
      expect(rollback.versionNumber).toBe(3);
      expect(rollback.title).toContain('Rollback');
    });
  });

  describe('compareRevisions', () => {
    it('should compare two revisions', async () => {
      const rev1 = await appRouter.revisions.createRevision.mutate({
        input: { scriptId: 1, title: 'v1', content: 'line1\nline2\nline3', authorId: 1 },
        ctx,
      });

      const rev2 = await appRouter.revisions.createRevision.mutate({
        input: { scriptId: 1, title: 'v2', content: 'line1\nchanged\nline3', authorId: 1 },
        ctx,
      });

      const result = await appRouter.revisions.compareRevisions.query({
        input: { baseRevisionId: rev1.id, targetRevisionId: rev2.id },
        ctx,
      });

      expect(result.diff.modifications).toBe(1);
      expect(result.diff.additions).toBe(0);
      expect(result.diff.deletions).toBe(0);
    });
  });

  describe('getTimeline', () => {
    it('should return timeline entries in chronological order', async () => {
      await appRouter.revisions.createRevision.mutate({
        input: { scriptId: 1, title: 'First', content: 'first', authorId: 1 },
        ctx,
      });

      await appRouter.revisions.createRevision.mutate({
        input: { scriptId: 1, title: 'Second', content: 'second', authorId: 1 },
        ctx,
      });

      const timeline = await appRouter.revisions.getTimeline.query({
        input: { scriptId: 1 },
        ctx,
      });

      expect(timeline).toHaveLength(2);
      expect(timeline[0]!.revision.title).toBe('First');
      expect(timeline[1]!.revision.title).toBe('Second');
    });
  });

  describe('getBranches', () => {
    it('should return branch information', async () => {
      await appRouter.revisions.createRevision.mutate({
        input: { scriptId: 1, title: 'main v1', content: 'main', authorId: 1 },
        ctx,
      });

      await appRouter.revisions.createBranch.mutate({
        input: { scriptId: 1, branchName: 'feature', authorId: 1 },
        ctx,
      });

      const branches = await appRouter.revisions.getBranches.query({
        input: { scriptId: 1 },
        ctx,
      });

      expect(branches).toHaveLength(2);
      const branchNames = branches.map((b: any) => b.branchName);
      expect(branchNames).toContain('main');
      expect(branchNames).toContain('feature');
    });
  });

  describe('deleteRevision', () => {
    it('should delete a revision', async () => {
      const created = await appRouter.revisions.createRevision.mutate({
        input: { scriptId: 1, title: 'To delete', content: 'content', authorId: 1 },
        ctx,
      });

      const result = await appRouter.revisions.deleteRevision.mutate({
        input: { id: created.id },
        ctx,
      });

      expect(result.success).toBe(true);

      await expect(
        appRouter.revisions.getRevision.query({
          input: { id: created.id },
          ctx,
        })
      ).rejects.toThrow();
    });
  });
});