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cim_summary/.kiro/specs/codebase-cleanup-and-upload-fix/requirements.md
Jon 6057d1d7fd 🔧 Fix authentication and document upload issues 
## What was done:
✅ Fixed Firebase Admin initialization to use default credentials for Firebase Functions
✅ Updated frontend to use correct Firebase Functions URL (was using Cloud Run URL)
✅ Added comprehensive debugging to authentication middleware
✅ Added debugging to file upload middleware and CORS handling
✅ Added debug buttons to frontend for troubleshooting authentication
✅ Enhanced error handling and logging throughout the stack

## Current issues:
❌ Document upload still returns 400 Bad Request despite authentication working
❌ GET requests work fine (200 OK) but POST upload requests fail
❌ Frontend authentication is working correctly (valid JWT tokens)
❌ Backend authentication middleware is working (rejects invalid tokens)
❌ CORS is configured correctly and allowing requests

## Root cause analysis:
- Authentication is NOT the issue (tokens are valid, GET requests work)
- The problem appears to be in the file upload handling or multer configuration
- Request reaches the server but fails during upload processing
- Need to identify exactly where in the upload pipeline the failure occurs

## TODO next steps:
1. 🔍 Check Firebase Functions logs after next upload attempt to see debugging output
2. 🔍 Verify if request reaches upload middleware (look for '�� Upload middleware called' logs)
3. 🔍 Check if file validation is triggered (look for '🔍 File filter called' logs)
4. 🔍 Identify specific error in upload pipeline (multer, file processing, etc.)
5. 🔍 Test with smaller file or different file type to isolate issue
6. 🔍 Check if issue is with Firebase Functions file size limits or timeout
7. 🔍 Verify multer configuration and file handling in Firebase Functions environment

## Technical details:
- Frontend: https://cim-summarizer.web.app
- Backend: https://us-central1-cim-summarizer.cloudfunctions.net/api
- Authentication: Firebase Auth with JWT tokens (working correctly)
- File upload: Multer with memory storage for immediate GCS upload
- Debug buttons available in production frontend for troubleshooting
2025-07-31 16:18:53 -04:00

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Requirements Document

Introduction

This feature focuses on cleaning up the codebase that has accumulated technical debt during the migration from local deployment to Firebase/GCloud solution, and resolving persistent document upload errors. The cleanup will improve code maintainability, remove redundant configurations, and establish a clear deployment strategy while fixing the core document upload functionality.

Requirements

Requirement 1

User Story: As a developer, I want a clean and organized codebase, so that I can easily maintain and extend the application without confusion from legacy configurations.

Acceptance Criteria

  1. WHEN reviewing the codebase THEN the system SHALL have only necessary environment files and configurations
  2. WHEN examining deployment configurations THEN the system SHALL have a single, clear deployment strategy for each environment
  3. WHEN looking at service configurations THEN the system SHALL have consistent Firebase/GCloud integration without local deployment remnants
  4. WHEN reviewing file structure THEN the system SHALL have organized directories without redundant or conflicting files

Requirement 2

User Story: As a user, I want to upload documents successfully, so that I can process and analyze my files without encountering errors.

Acceptance Criteria

  1. WHEN a user uploads a document THEN the system SHALL accept the file and begin processing without errors
  2. WHEN document upload fails THEN the system SHALL provide clear error messages indicating the specific issue
  3. WHEN processing a document THEN the system SHALL handle all file types supported by the Document AI service
  4. WHEN upload completes THEN the system SHALL store the document in the correct Firebase/GCloud storage location

Requirement 3

User Story: As a developer, I want clear error logging and debugging capabilities, so that I can quickly identify and resolve issues in the document processing pipeline.

Acceptance Criteria

  1. WHEN an error occurs during upload THEN the system SHALL log detailed error information including stack traces
  2. WHEN debugging upload issues THEN the system SHALL provide clear logging at each step of the process
  3. WHEN errors occur THEN the system SHALL distinguish between client-side and server-side issues
  4. WHEN reviewing logs THEN the system SHALL have structured logging with appropriate log levels

Requirement 4

User Story: As a system administrator, I want consistent and secure configuration management, so that the application can be deployed reliably across different environments.

Acceptance Criteria

  1. WHEN deploying to different environments THEN the system SHALL use environment-specific configurations
  2. WHEN handling sensitive data THEN the system SHALL properly manage API keys and credentials
  3. WHEN configuring services THEN the system SHALL have consistent Firebase/GCloud service initialization
  4. WHEN reviewing security THEN the system SHALL have proper authentication and authorization for file uploads

Requirement 5

User Story: As a developer, I want to understand the current system architecture, so that I can make informed decisions about cleanup priorities and upload error resolution.

Acceptance Criteria

  1. WHEN analyzing the codebase THEN the system SHALL have documented service dependencies and data flow
  2. WHEN reviewing upload process THEN the system SHALL have clear understanding of each processing step
  3. WHEN examining errors THEN the system SHALL identify specific failure points in the upload pipeline
  4. WHEN planning cleanup THEN the system SHALL prioritize changes that don't break existing functionality
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