import { expect, tap } from '@git.zone/tstest/tapbundle';
import { SmartRegistry } from '../ts/index.js';
import {
  createTestRegistryWithUpstream,
  createTrackingUpstreamProvider,
} from './helpers/registry.js';
import { StaticUpstreamProvider } from '../ts/upstream/interfaces.upstream.js';
import type {
  IUpstreamProvider,
  IUpstreamResolutionContext,
  IProtocolUpstreamConfig,
} from '../ts/upstream/interfaces.upstream.js';
import type { TRegistryProtocol } from '../ts/core/interfaces.core.js';

// =============================================================================
// StaticUpstreamProvider Tests
// =============================================================================

tap.test('StaticUpstreamProvider: should return config for configured protocol', async () => {
  const npmConfig: IProtocolUpstreamConfig = {
    enabled: true,
    upstreams: [{ id: 'npmjs', url: 'https://registry.npmjs.org', priority: 1, enabled: true }],
  };

  const provider = new StaticUpstreamProvider({
    npm: npmConfig,
  });

  const result = await provider.resolveUpstreamConfig({
    protocol: 'npm',
    resource: 'lodash',
    scope: null,
    method: 'GET',
    resourceType: 'packument',
  });

  expect(result).toBeDefined();
  expect(result?.enabled).toEqual(true);
  expect(result?.upstreams[0].id).toEqual('npmjs');
});

tap.test('StaticUpstreamProvider: should return null for unconfigured protocol', async () => {
  const provider = new StaticUpstreamProvider({
    npm: {
      enabled: true,
      upstreams: [{ id: 'npmjs', url: 'https://registry.npmjs.org', priority: 1, enabled: true }],
    },
  });

  const result = await provider.resolveUpstreamConfig({
    protocol: 'maven',
    resource: 'com.example:lib',
    scope: 'com.example',
    method: 'GET',
    resourceType: 'pom',
  });

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

tap.test('StaticUpstreamProvider: should support multiple protocols', async () => {
  const provider = new StaticUpstreamProvider({
    npm: {
      enabled: true,
      upstreams: [{ id: 'npmjs', url: 'https://registry.npmjs.org', priority: 1, enabled: true }],
    },
    oci: {
      enabled: true,
      upstreams: [{ id: 'dockerhub', url: 'https://registry-1.docker.io', priority: 1, enabled: true }],
    },
    maven: {
      enabled: true,
      upstreams: [{ id: 'central', url: 'https://repo1.maven.org/maven2', priority: 1, enabled: true }],
    },
  });

  const npmResult = await provider.resolveUpstreamConfig({
    protocol: 'npm',
    resource: 'lodash',
    scope: null,
    method: 'GET',
    resourceType: 'packument',
  });
  expect(npmResult?.upstreams[0].id).toEqual('npmjs');

  const ociResult = await provider.resolveUpstreamConfig({
    protocol: 'oci',
    resource: 'library/nginx',
    scope: 'library',
    method: 'GET',
    resourceType: 'manifest',
  });
  expect(ociResult?.upstreams[0].id).toEqual('dockerhub');

  const mavenResult = await provider.resolveUpstreamConfig({
    protocol: 'maven',
    resource: 'com.example:lib',
    scope: 'com.example',
    method: 'GET',
    resourceType: 'pom',
  });
  expect(mavenResult?.upstreams[0].id).toEqual('central');
});

// =============================================================================
// Registry with Provider Integration Tests
// =============================================================================

let registry: SmartRegistry;
let trackingProvider: ReturnType<typeof createTrackingUpstreamProvider>;

tap.test('Provider Integration: should create registry with upstream provider', async () => {
  trackingProvider = createTrackingUpstreamProvider({
    npm: {
      enabled: true,
      upstreams: [{ id: 'test-npm', url: 'https://registry.npmjs.org', priority: 1, enabled: true }],
    },
  });

  registry = await createTestRegistryWithUpstream(trackingProvider.provider);

  expect(registry).toBeInstanceOf(SmartRegistry);
  expect(registry.isInitialized()).toEqual(true);
});

tap.test('Provider Integration: should call provider when fetching unknown npm package', async () => {
  // Clear previous calls
  trackingProvider.calls.length = 0;

  // Request a package that doesn't exist locally - should trigger upstream lookup
  const response = await registry.handleRequest({
    method: 'GET',
    path: '/npm/@test-scope/nonexistent-package',
    headers: {},
    query: {},
  });

  // Provider should have been called for the packument lookup
  const npmCalls = trackingProvider.calls.filter(c => c.protocol === 'npm');

  // The package doesn't exist locally, so upstream should be consulted
  // Note: actual upstream fetch may fail since the package doesn't exist
  expect(response.status).toBeOneOf([404, 200, 502]); // 404 if not found, 502 if upstream error
});

tap.test('Provider Integration: provider receives correct context for scoped npm package', async () => {
  trackingProvider.calls.length = 0;

  // Use URL-encoded path for scoped packages as npm client does
  await registry.handleRequest({
    method: 'GET',
    path: '/npm/@myorg%2fmy-package',
    headers: {},
    query: {},
  });

  // Find any npm call - the exact resource type depends on routing
  const npmCalls = trackingProvider.calls.filter(c => c.protocol === 'npm');

  // Provider should be called for upstream lookup
  if (npmCalls.length > 0) {
    const call = npmCalls[0];
    expect(call.protocol).toEqual('npm');
    // The resource should include the scoped name
    expect(call.resource).toInclude('myorg');
    expect(call.method).toEqual('GET');
  }
});

tap.test('Provider Integration: provider receives correct context for unscoped npm package', async () => {
  trackingProvider.calls.length = 0;

  await registry.handleRequest({
    method: 'GET',
    path: '/npm/lodash',
    headers: {},
    query: {},
  });

  const packumentCall = trackingProvider.calls.find(
    c => c.protocol === 'npm' && c.resourceType === 'packument'
  );

  if (packumentCall) {
    expect(packumentCall.protocol).toEqual('npm');
    expect(packumentCall.resource).toEqual('lodash');
    expect(packumentCall.scope).toBeNull(); // No scope for unscoped package
  }
});

// =============================================================================
// Custom Provider Implementation Tests
// =============================================================================

tap.test('Custom Provider: should support dynamic resolution based on context', async () => {
  // Create a provider that returns different configs based on scope
  const dynamicProvider: IUpstreamProvider = {
    async resolveUpstreamConfig(context: IUpstreamResolutionContext) {
      if (context.scope === 'internal') {
        // Internal packages go to private registry
        return {
          enabled: true,
          upstreams: [{ id: 'private', url: 'https://private.registry.com', priority: 1, enabled: true }],
        };
      }
      // Everything else goes to public registry
      return {
        enabled: true,
        upstreams: [{ id: 'public', url: 'https://registry.npmjs.org', priority: 1, enabled: true }],
      };
    },
  };

  const internalResult = await dynamicProvider.resolveUpstreamConfig({
    protocol: 'npm',
    resource: '@internal/utils',
    scope: 'internal',
    method: 'GET',
    resourceType: 'packument',
  });
  expect(internalResult?.upstreams[0].id).toEqual('private');

  const publicResult = await dynamicProvider.resolveUpstreamConfig({
    protocol: 'npm',
    resource: '@public/utils',
    scope: 'public',
    method: 'GET',
    resourceType: 'packument',
  });
  expect(publicResult?.upstreams[0].id).toEqual('public');
});

tap.test('Custom Provider: should support actor-based resolution', async () => {
  const actorAwareProvider: IUpstreamProvider = {
    async resolveUpstreamConfig(context: IUpstreamResolutionContext) {
      // Different upstreams based on user's organization
      if (context.actor?.orgId === 'enterprise-org') {
        return {
          enabled: true,
          upstreams: [{ id: 'enterprise', url: 'https://enterprise.registry.com', priority: 1, enabled: true }],
        };
      }
      return {
        enabled: true,
        upstreams: [{ id: 'default', url: 'https://registry.npmjs.org', priority: 1, enabled: true }],
      };
    },
  };

  const enterpriseResult = await actorAwareProvider.resolveUpstreamConfig({
    protocol: 'npm',
    resource: 'lodash',
    scope: null,
    actor: { orgId: 'enterprise-org', userId: 'user1' },
    method: 'GET',
    resourceType: 'packument',
  });
  expect(enterpriseResult?.upstreams[0].id).toEqual('enterprise');

  const defaultResult = await actorAwareProvider.resolveUpstreamConfig({
    protocol: 'npm',
    resource: 'lodash',
    scope: null,
    actor: { orgId: 'free-org', userId: 'user2' },
    method: 'GET',
    resourceType: 'packument',
  });
  expect(defaultResult?.upstreams[0].id).toEqual('default');
});

tap.test('Custom Provider: should support disabling upstream for specific resources', async () => {
  const selectiveProvider: IUpstreamProvider = {
    async resolveUpstreamConfig(context: IUpstreamResolutionContext) {
      // Block upstream for internal packages
      if (context.scope === 'internal') {
        return null; // No upstream for internal packages
      }
      return {
        enabled: true,
        upstreams: [{ id: 'public', url: 'https://registry.npmjs.org', priority: 1, enabled: true }],
      };
    },
  };

  const internalResult = await selectiveProvider.resolveUpstreamConfig({
    protocol: 'npm',
    resource: '@internal/secret',
    scope: 'internal',
    method: 'GET',
    resourceType: 'packument',
  });
  expect(internalResult).toBeNull();

  const publicResult = await selectiveProvider.resolveUpstreamConfig({
    protocol: 'npm',
    resource: 'lodash',
    scope: null,
    method: 'GET',
    resourceType: 'packument',
  });
  expect(publicResult).not.toBeNull();
});

// =============================================================================
// Registry without Provider Tests
// =============================================================================

tap.test('No Provider: registry should work without upstream provider', async () => {
  const registryWithoutUpstream = await createTestRegistryWithUpstream(
    // Pass a provider that always returns null
    {
      async resolveUpstreamConfig() {
        return null;
      },
    }
  );

  expect(registryWithoutUpstream).toBeInstanceOf(SmartRegistry);

  // Should return 404 for non-existent package (no upstream to check)
  const response = await registryWithoutUpstream.handleRequest({
    method: 'GET',
    path: '/npm/nonexistent-package-xyz',
    headers: {},
    query: {},
  });

  expect(response.status).toEqual(404);

  registryWithoutUpstream.destroy();
});

// =============================================================================
// Cleanup
// =============================================================================

tap.postTask('cleanup registry', async () => {
  if (registry) {
    registry.destroy();
  }
});

export default tap.start();