import * as plugins from '../../plugins.ts';
import * as interfaces from '../../../ts_interfaces/index.ts';
import type { OpsServer } from '../classes.opsserver.ts';
import { externalAuthService } from '../../services/external.auth.service.ts';

export class OAuthHandler {
  public typedrouter = new plugins.typedrequest.TypedRouter();

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

  private registerHandlers(): void {
    // OAuth Authorize - initiate OAuth flow
    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<interfaces.requests.IReq_OAuthAuthorize>(
        'oauthAuthorize',
        async (dataArg) => {
          try {
            const { providerId, returnUrl } = dataArg;

            const { authUrl } = await externalAuthService.initiateOAuth(providerId, returnUrl);

            return { redirectUrl: authUrl };
          } catch (error) {
            if (error instanceof plugins.typedrequest.TypedResponseError) throw error;
            const errorMessage = error instanceof Error ? error.message : 'Authorization failed';
            throw new plugins.typedrequest.TypedResponseError(errorMessage);
          }
        },
      ),
    );

    // OAuth Callback - handle provider callback
    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<interfaces.requests.IReq_OAuthCallback>(
        'oauthCallback',
        async (dataArg) => {
          try {
            const { code, state } = dataArg;

            if (!code || !state) {
              return {
                errorCode: 'MISSING_PARAMETERS',
                errorMessage: 'Code and state are required',
              };
            }

            const result = await externalAuthService.handleOAuthCallback(
              { code, state },
              {},
            );

            if (!result.success) {
              return {
                errorCode: result.errorCode,
                errorMessage: result.errorMessage,
              };
            }

            const user = result.user!;
            const expiresAt = Date.now() + 15 * 60 * 1000;

            return {
              identity: {
                jwt: result.accessToken!,
                refreshJwt: result.refreshToken!,
                userId: user.id,
                email: user.email,
                username: user.username,
                displayName: user.displayName,
                isSystemAdmin: user.isSystemAdmin,
                expiresAt,
                sessionId: result.sessionId!,
              },
              user: {
                id: user.id,
                email: user.email,
                username: user.username,
                displayName: user.displayName,
                avatarUrl: user.avatarUrl,
                isSystemAdmin: user.isSystemAdmin,
                isActive: user.isActive,
                createdAt: user.createdAt instanceof Date ? user.createdAt.toISOString() : String(user.createdAt),
                lastLoginAt: user.lastLoginAt instanceof Date ? user.lastLoginAt.toISOString() : user.lastLoginAt ? String(user.lastLoginAt) : undefined,
              },
            };
          } catch (error) {
            if (error instanceof plugins.typedrequest.TypedResponseError) throw error;
            throw new plugins.typedrequest.TypedResponseError('OAuth callback failed');
          }
        },
      ),
    );

    // LDAP Login
    this.typedrouter.addTypedHandler(
      new plugins.typedrequest.TypedHandler<interfaces.requests.IReq_LdapLogin>(
        'ldapLogin',
        async (dataArg) => {
          try {
            const { providerId, username, password } = dataArg;

            if (!username || !password) {
              throw new plugins.typedrequest.TypedResponseError(
                'Username and password are required',
              );
            }

            const result = await externalAuthService.authenticateLdap(
              providerId,
              username,
              password,
              {},
            );

            if (!result.success) {
              return {
                errorCode: result.errorCode,
                errorMessage: result.errorMessage,
              };
            }

            const user = result.user!;
            const expiresAt = Date.now() + 15 * 60 * 1000;

            return {
              identity: {
                jwt: result.accessToken!,
                refreshJwt: result.refreshToken!,
                userId: user.id,
                email: user.email,
                username: user.username,
                displayName: user.displayName,
                isSystemAdmin: user.isSystemAdmin,
                expiresAt,
                sessionId: result.sessionId!,
              },
              user: {
                id: user.id,
                email: user.email,
                username: user.username,
                displayName: user.displayName,
                avatarUrl: user.avatarUrl,
                isSystemAdmin: user.isSystemAdmin,
                isActive: user.isActive,
                createdAt: user.createdAt instanceof Date ? user.createdAt.toISOString() : String(user.createdAt),
                lastLoginAt: user.lastLoginAt instanceof Date ? user.lastLoginAt.toISOString() : user.lastLoginAt ? String(user.lastLoginAt) : undefined,
              },
            };
          } catch (error) {
            if (error instanceof plugins.typedrequest.TypedResponseError) throw error;
            throw new plugins.typedrequest.TypedResponseError('LDAP login failed');
          }
        },
      ),
    );
  }
}