import * as plugins from '../../plugins.ts';
import * as interfaces from '../../../ts_interfaces/index.ts';
import type { OpsServer } from '../classes.opsserver.ts';
import { requireValidIdentity } from '../helpers/guards.ts';
import { Organization, Repository } from '../../models/index.ts';
import { PermissionService } from '../../services/permission.service.ts';
import { AuditService } from '../../services/audit.service.ts';

export class RepositoryHandler {
  public typedrouter = new plugins.typedrequest.TypedRouter();
  private permissionService = new PermissionService();

  constructor(private opsServerRef: OpsServer) {
    this.opsServerRef.typedrouter.addTypedRouter(this.typedrouter);
    this.registerHandlers();
  }

  private registerHandlers(): void {
    // Get Repositories
    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<interfaces.requests.IReq_GetRepositories>(
        'getRepositories',
        async (dataArg) => {
          await requireValidIdentity(this.opsServerRef.authHandler, dataArg);

          try {
            const repositories = await this.permissionService.getAccessibleRepositories(
              dataArg.identity.userId,
              dataArg.organizationId,
            );

            return {
              repositories: repositories.map((repo) => ({
                id: repo.id,
                organizationId: repo.organizationId,
                name: repo.name,
                description: repo.description,
                protocol: repo.protocol as interfaces.data.TRegistryProtocol,
                visibility: repo.visibility as interfaces.data.TRepositoryVisibility,
                isPublic: repo.isPublic,
                packageCount: repo.packageCount,
                storageBytes: repo.storageBytes || 0,
                downloadCount: (repo as any).downloadCount || 0,
                createdAt: repo.createdAt instanceof Date ? repo.createdAt.toISOString() : String(repo.createdAt),
              })),
            };
          } catch (error) {
            if (error instanceof plugins.typedrequest.TypedResponseError) throw error;
            throw new plugins.typedrequest.TypedResponseError('Failed to list repositories');
          }
        },
      ),
    );

    // Get Repository
    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<interfaces.requests.IReq_GetRepository>(
        'getRepository',
        async (dataArg) => {
          await requireValidIdentity(this.opsServerRef.authHandler, dataArg);

          try {
            const repo = await Repository.findById(dataArg.repositoryId);
            if (!repo) {
              throw new plugins.typedrequest.TypedResponseError('Repository not found');
            }

            // Check access
            if (!repo.isPublic) {
              const permissions = await this.permissionService.resolvePermissions({
                userId: dataArg.identity.userId,
                organizationId: repo.organizationId,
                repositoryId: repo.id,
              });

              if (!permissions.canRead) {
                throw new plugins.typedrequest.TypedResponseError('Access denied');
              }
            }

            return {
              repository: {
                id: repo.id,
                organizationId: repo.organizationId,
                name: repo.name,
                description: repo.description,
                protocol: repo.protocol as interfaces.data.TRegistryProtocol,
                visibility: repo.visibility as interfaces.data.TRepositoryVisibility,
                isPublic: repo.isPublic,
                packageCount: repo.packageCount,
                storageBytes: repo.storageBytes || 0,
                downloadCount: (repo as any).downloadCount || 0,
                createdAt: repo.createdAt instanceof Date ? repo.createdAt.toISOString() : String(repo.createdAt),
              },
            };
          } catch (error) {
            if (error instanceof plugins.typedrequest.TypedResponseError) throw error;
            throw new plugins.typedrequest.TypedResponseError('Failed to get repository');
          }
        },
      ),
    );

    // Create Repository
    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<interfaces.requests.IReq_CreateRepository>(
        'createRepository',
        async (dataArg) => {
          await requireValidIdentity(this.opsServerRef.authHandler, dataArg);

          try {
            const { organizationId, name, description, protocol, visibility } = dataArg;

            // Check admin permission
            const canManage = await this.permissionService.canManageOrganization(
              dataArg.identity.userId,
              organizationId,
            );
            if (!canManage) {
              throw new plugins.typedrequest.TypedResponseError('Admin access required');
            }

            if (!name) {
              throw new plugins.typedrequest.TypedResponseError('Repository name is required');
            }

            // Validate name format
            if (!/^[a-z0-9]([a-z0-9._-]*[a-z0-9])?$/.test(name)) {
              throw new plugins.typedrequest.TypedResponseError(
                'Name must be lowercase alphanumeric with optional dots, hyphens, or underscores',
              );
            }

            // Check org exists
            const org = await Organization.findById(organizationId);
            if (!org) {
              throw new plugins.typedrequest.TypedResponseError('Organization not found');
            }

            // Create repository
            const repo = await Repository.createRepository({
              organizationId,
              name,
              description,
              protocol: protocol || 'npm',
              visibility: visibility || 'private',
              createdById: dataArg.identity.userId,
            });

            // Audit log
            await AuditService.withContext({
              actorId: dataArg.identity.userId,
              actorType: 'user',
              organizationId,
            }).logRepositoryCreated(repo.id, repo.name, organizationId);

            return {
              repository: {
                id: repo.id,
                organizationId: repo.organizationId,
                name: repo.name,
                description: repo.description,
                protocol: repo.protocol as interfaces.data.TRegistryProtocol,
                visibility: repo.visibility as interfaces.data.TRepositoryVisibility,
                isPublic: repo.isPublic,
                packageCount: repo.packageCount,
                storageBytes: repo.storageBytes || 0,
                downloadCount: 0,
                createdAt: repo.createdAt instanceof Date ? repo.createdAt.toISOString() : String(repo.createdAt),
              },
            };
          } catch (error) {
            if (error instanceof plugins.typedrequest.TypedResponseError) throw error;
            throw new plugins.typedrequest.TypedResponseError('Failed to create repository');
          }
        },
      ),
    );

    // Update Repository
    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<interfaces.requests.IReq_UpdateRepository>(
        'updateRepository',
        async (dataArg) => {
          await requireValidIdentity(this.opsServerRef.authHandler, dataArg);

          try {
            const repo = await Repository.findById(dataArg.repositoryId);
            if (!repo) {
              throw new plugins.typedrequest.TypedResponseError('Repository not found');
            }

            // Check admin permission
            const canManage = await this.permissionService.canManageRepository(
              dataArg.identity.userId,
              repo.organizationId,
              dataArg.repositoryId,
            );
            if (!canManage) {
              throw new plugins.typedrequest.TypedResponseError('Admin access required');
            }

            if (dataArg.description !== undefined) repo.description = dataArg.description;
            if (dataArg.visibility !== undefined) repo.visibility = dataArg.visibility as any;

            await repo.save();

            return {
              repository: {
                id: repo.id,
                organizationId: repo.organizationId,
                name: repo.name,
                description: repo.description,
                protocol: repo.protocol as interfaces.data.TRegistryProtocol,
                visibility: repo.visibility as interfaces.data.TRepositoryVisibility,
                isPublic: repo.isPublic,
                packageCount: repo.packageCount,
                storageBytes: repo.storageBytes || 0,
                downloadCount: (repo as any).downloadCount || 0,
                createdAt: repo.createdAt instanceof Date ? repo.createdAt.toISOString() : String(repo.createdAt),
              },
            };
          } catch (error) {
            if (error instanceof plugins.typedrequest.TypedResponseError) throw error;
            throw new plugins.typedrequest.TypedResponseError('Failed to update repository');
          }
        },
      ),
    );

    // Delete Repository
    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<interfaces.requests.IReq_DeleteRepository>(
        'deleteRepository',
        async (dataArg) => {
          await requireValidIdentity(this.opsServerRef.authHandler, dataArg);

          try {
            const repo = await Repository.findById(dataArg.repositoryId);
            if (!repo) {
              throw new plugins.typedrequest.TypedResponseError('Repository not found');
            }

            // Check admin permission
            const canManage = await this.permissionService.canManageRepository(
              dataArg.identity.userId,
              repo.organizationId,
              dataArg.repositoryId,
            );
            if (!canManage) {
              throw new plugins.typedrequest.TypedResponseError('Admin access required');
            }

            // Check for packages
            if (repo.packageCount > 0) {
              throw new plugins.typedrequest.TypedResponseError(
                'Cannot delete repository with packages. Remove all packages first.',
              );
            }

            await repo.delete();

            return { message: 'Repository deleted successfully' };
          } catch (error) {
            if (error instanceof plugins.typedrequest.TypedResponseError) throw error;
            throw new plugins.typedrequest.TypedResponseError('Failed to delete repository');
          }
        },
      ),
    );
  }
}