import { describe, it, expect } from 'vitest';
import { generateWebFingerJRD } from '../src/generators/webfinger.js';
import type { WebFingerConfig } from '../src/types.js';

describe('generateWebFingerJRD', () => {
  const testURL = new URL('https://example.com');

  describe('Static Resources', () => {
    it('returns null for unknown resource', async () => {
      const config: WebFingerConfig = {
        resources: [
          {
            resource: 'acct:alice@example.com',
            subject: 'acct:alice@example.com',
          },
        ],
      };

      const result = await generateWebFingerJRD(
        config,
        'acct:bob@example.com',
        undefined,
        testURL
      );

      expect(result).toBeNull();
    });

    it('generates basic JRD for known resource', async () => {
      const config: WebFingerConfig = {
        resources: [
          {
            resource: 'acct:alice@example.com',
            subject: 'acct:alice@example.com',
          },
        ],
      };

      const result = await generateWebFingerJRD(
        config,
        'acct:alice@example.com',
        undefined,
        testURL
      );

      expect(result).toBeTruthy();
      const jrd = JSON.parse(result!);
      expect(jrd.subject).toBe('acct:alice@example.com');
    });

    it('uses resource as subject when subject not provided', async () => {
      const config: WebFingerConfig = {
        resources: [
          {
            resource: 'acct:alice@example.com',
          },
        ],
      };

      const result = await generateWebFingerJRD(
        config,
        'acct:alice@example.com',
        undefined,
        testURL
      );

      const jrd = JSON.parse(result!);
      expect(jrd.subject).toBe('acct:alice@example.com');
    });

    it('includes aliases when provided', async () => {
      const config: WebFingerConfig = {
        resources: [
          {
            resource: 'acct:alice@example.com',
            aliases: [
              'https://example.com/~alice',
              'https://example.com/users/alice',
            ],
          },
        ],
      };

      const result = await generateWebFingerJRD(
        config,
        'acct:alice@example.com',
        undefined,
        testURL
      );

      const jrd = JSON.parse(result!);
      expect(jrd.aliases).toEqual([
        'https://example.com/~alice',
        'https://example.com/users/alice',
      ]);
    });

    it('includes properties when provided', async () => {
      const config: WebFingerConfig = {
        resources: [
          {
            resource: 'acct:alice@example.com',
            properties: {
              'http://schema.org/name': 'Alice Smith',
              'http://example.com/role': 'Developer',
            },
          },
        ],
      };

      const result = await generateWebFingerJRD(
        config,
        'acct:alice@example.com',
        undefined,
        testURL
      );

      const jrd = JSON.parse(result!);
      expect(jrd.properties).toEqual({
        'http://schema.org/name': 'Alice Smith',
        'http://example.com/role': 'Developer',
      });
    });

    it('includes links when provided', async () => {
      const config: WebFingerConfig = {
        resources: [
          {
            resource: 'acct:alice@example.com',
            links: [
              {
                rel: 'http://webfinger.net/rel/profile-page',
                href: 'https://example.com/~alice',
                type: 'text/html',
              },
              {
                rel: 'http://webfinger.net/rel/avatar',
                href: 'https://example.com/avatars/alice.jpg',
                type: 'image/jpeg',
              },
            ],
          },
        ],
      };

      const result = await generateWebFingerJRD(
        config,
        'acct:alice@example.com',
        undefined,
        testURL
      );

      const jrd = JSON.parse(result!);
      expect(jrd.links).toHaveLength(2);
      expect(jrd.links[0].rel).toBe('http://webfinger.net/rel/profile-page');
      expect(jrd.links[0].href).toBe('https://example.com/~alice');
      expect(jrd.links[1].rel).toBe('http://webfinger.net/rel/avatar');
    });

    it('filters links by rel when requested', async () => {
      const config: WebFingerConfig = {
        resources: [
          {
            resource: 'acct:alice@example.com',
            links: [
              {
                rel: 'http://webfinger.net/rel/profile-page',
                href: 'https://example.com/~alice',
              },
              {
                rel: 'http://webfinger.net/rel/avatar',
                href: 'https://example.com/avatars/alice.jpg',
              },
              {
                rel: 'http://openid.net/specs/connect/1.0/issuer',
                href: 'https://auth.example.com',
              },
            ],
          },
        ],
      };

      const result = await generateWebFingerJRD(
        config,
        'acct:alice@example.com',
        ['http://webfinger.net/rel/profile-page'],
        testURL
      );

      const jrd = JSON.parse(result!);
      expect(jrd.links).toHaveLength(1);
      expect(jrd.links[0].rel).toBe('http://webfinger.net/rel/profile-page');
    });

    it('filters links by multiple rels', async () => {
      const config: WebFingerConfig = {
        resources: [
          {
            resource: 'acct:alice@example.com',
            links: [
              { rel: 'profile', href: 'https://example.com/~alice' },
              { rel: 'avatar', href: 'https://example.com/avatars/alice.jpg' },
              { rel: 'blog', href: 'https://blog.example.com/alice' },
            ],
          },
        ],
      };

      const result = await generateWebFingerJRD(
        config,
        'acct:alice@example.com',
        ['profile', 'blog'],
        testURL
      );

      const jrd = JSON.parse(result!);
      expect(jrd.links).toHaveLength(2);
      expect(jrd.links[0].rel).toBe('profile');
      expect(jrd.links[1].rel).toBe('blog');
    });

    it('includes link titles when provided', async () => {
      const config: WebFingerConfig = {
        resources: [
          {
            resource: 'acct:alice@example.com',
            links: [
              {
                rel: 'http://webfinger.net/rel/profile-page',
                href: 'https://example.com/~alice',
                titles: {
                  en: 'Alice Smith Profile',
                  es: 'Perfil de Alice Smith',
                },
              },
            ],
          },
        ],
      };

      const result = await generateWebFingerJRD(
        config,
        'acct:alice@example.com',
        undefined,
        testURL
      );

      const jrd = JSON.parse(result!);
      expect(jrd.links[0].titles).toEqual({
        en: 'Alice Smith Profile',
        es: 'Perfil de Alice Smith',
      });
    });

    it('generates complete JRD with all fields', async () => {
      const config: WebFingerConfig = {
        resources: [
          {
            resource: 'acct:alice@example.com',
            subject: 'acct:alice@example.com',
            aliases: ['https://example.com/~alice'],
            properties: {
              'http://schema.org/name': 'Alice Smith',
            },
            links: [
              {
                rel: 'http://webfinger.net/rel/profile-page',
                href: 'https://example.com/~alice',
                type: 'text/html',
                titles: { en: 'Profile' },
              },
            ],
          },
        ],
      };

      const result = await generateWebFingerJRD(
        config,
        'acct:alice@example.com',
        undefined,
        testURL
      );

      const jrd = JSON.parse(result!);
      expect(jrd.subject).toBe('acct:alice@example.com');
      expect(jrd.aliases).toEqual(['https://example.com/~alice']);
      expect(jrd.properties).toEqual({
        'http://schema.org/name': 'Alice Smith',
      });
      expect(jrd.links).toHaveLength(1);
      expect(jrd.links[0].rel).toBe('http://webfinger.net/rel/profile-page');
    });
  });

  describe('HTTP Resource URIs', () => {
    it('supports https:// resource URIs', async () => {
      const config: WebFingerConfig = {
        resources: [
          {
            resource: 'https://example.com/user/alice',
            links: [
              {
                rel: 'http://webfinger.net/rel/profile-page',
                href: 'https://example.com/user/alice',
              },
            ],
          },
        ],
      };

      const result = await generateWebFingerJRD(
        config,
        'https://example.com/user/alice',
        undefined,
        testURL
      );

      expect(result).toBeTruthy();
      const jrd = JSON.parse(result!);
      expect(jrd.subject).toBe('https://example.com/user/alice');
    });
  });

  describe('ActivityPub / Fediverse', () => {
    it('supports ActivityPub profile discovery', async () => {
      const config: WebFingerConfig = {
        resources: [
          {
            resource: 'acct:alice@example.com',
            aliases: ['https://example.com/@alice'],
            links: [
              {
                rel: 'self',
                type: 'application/activity+json',
                href: 'https://example.com/users/alice',
              },
              {
                rel: 'http://webfinger.net/rel/profile-page',
                type: 'text/html',
                href: 'https://example.com/@alice',
              },
            ],
          },
        ],
      };

      const result = await generateWebFingerJRD(
        config,
        'acct:alice@example.com',
        undefined,
        testURL
      );

      const jrd = JSON.parse(result!);
      expect(jrd.links).toHaveLength(2);
      expect(jrd.links[0].type).toBe('application/activity+json');
      expect(jrd.links[0].rel).toBe('self');
    });
  });

  describe('OpenID Connect', () => {
    it('supports OpenID Connect issuer discovery', async () => {
      const config: WebFingerConfig = {
        resources: [
          {
            resource: 'acct:alice@example.com',
            links: [
              {
                rel: 'http://openid.net/specs/connect/1.0/issuer',
                href: 'https://auth.example.com',
              },
            ],
          },
        ],
      };

      const result = await generateWebFingerJRD(
        config,
        'acct:alice@example.com',
        ['http://openid.net/specs/connect/1.0/issuer'],
        testURL
      );

      const jrd = JSON.parse(result!);
      expect(jrd.links).toHaveLength(1);
      expect(jrd.links[0].rel).toBe(
        'http://openid.net/specs/connect/1.0/issuer'
      );
      expect(jrd.links[0].href).toBe('https://auth.example.com');
    });
  });

  describe('Edge Cases', () => {
    it('returns valid JSON for resource with no links', async () => {
      const config: WebFingerConfig = {
        resources: [
          {
            resource: 'acct:alice@example.com',
          },
        ],
      };

      const result = await generateWebFingerJRD(
        config,
        'acct:alice@example.com',
        undefined,
        testURL
      );

      const jrd = JSON.parse(result!);
      expect(jrd.subject).toBe('acct:alice@example.com');
      expect(jrd.links).toBeUndefined();
    });

    it('omits empty aliases array', async () => {
      const config: WebFingerConfig = {
        resources: [
          {
            resource: 'acct:alice@example.com',
            aliases: [],
          },
        ],
      };

      const result = await generateWebFingerJRD(
        config,
        'acct:alice@example.com',
        undefined,
        testURL
      );

      const jrd = JSON.parse(result!);
      expect(jrd.aliases).toBeUndefined();
    });

    it('omits empty properties object', async () => {
      const config: WebFingerConfig = {
        resources: [
          {
            resource: 'acct:alice@example.com',
            properties: {},
          },
        ],
      };

      const result = await generateWebFingerJRD(
        config,
        'acct:alice@example.com',
        undefined,
        testURL
      );

      const jrd = JSON.parse(result!);
      expect(jrd.properties).toBeUndefined();
    });

    it('returns null when all links filtered out by rel', async () => {
      const config: WebFingerConfig = {
        resources: [
          {
            resource: 'acct:alice@example.com',
            links: [
              { rel: 'profile', href: 'https://example.com/~alice' },
            ],
          },
        ],
      };

      const result = await generateWebFingerJRD(
        config,
        'acct:alice@example.com',
        ['avatar'], // Requesting rel that doesn't exist
        testURL
      );

      const jrd = JSON.parse(result!);
      expect(jrd.links).toBeUndefined();
    });
  });
});