# 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