# File Validation Fix: Prevent Wrong File Translation

**Date**: 2025-11-12  
**Issue**: Bilingual file was getting PDF content instead of Word document content

---

## Root Cause

The bilingual file `worship_program_2025-11-09_bilingual.txt` shows:
- **Source**: `worship_program_2025-11-09.docx`
- **Content**: Contains worship program structure (Scripture Reference, Songs, Prayer points)

**Problem**: The user uploaded a **previously generated worship program DOCX** instead of the **original sermon/transcript DOCX**.

---

## Why This Happened

1. User previously generated a worship program → `worship_program_2025-11-09.docx`
2. User uploaded this generated file instead of the original sermon DOCX
3. System translated the worship program content (which came from PDF) instead of sermon content
4. Result: Bilingual file contains PDF-like content, not sermon content

---

## Fix Applied

### 1. Filename Validation ✅

**File**: `app.py::translate_document()`

**Check**: Reject files with "worship_program" or "worship-program" in filename

```python
# Check if this looks like a worship program file (should not be translated)
filename = os.path.basename(docx_path).lower()
if 'worship_program' in filename or 'worship-program' in filename:
    print(f"Warning: File '{filename}' appears to be a worship program, not a sermon transcript.")
    print("Please upload the original sermon/transcript DOCX file, not a generated worship program.")
    return None
```

### 2. Content Validation ✅

**Check**: Detect worship program structure in content

```python
# Validate that this looks like a sermon/transcript, not a worship program
content_lower = content.lower()
worship_program_indicators = [
    '## call to worship',
    '## songs',
    '## prayer',
    '## message',
    '## announcements',
    'worship program',
    'scripture reference',
    'today\'s bible reading'
]

indicator_count = sum(1 for indicator in worship_program_indicators if indicator in content_lower)
if indicator_count >= 3:
    print(f"Warning: The DOCX file appears to be a worship program (found {indicator_count} program indicators), not a sermon transcript.")
    print("Please upload the original sermon/transcript DOCX file for translation.")
    return None
```

### 3. Better Error Messages ✅

**File**: `app.py::process_worship_program()`

**Change**: Provide clear error message when wrong file type is detected

```python
if not bilingual_path_temp or not os.path.exists(bilingual_path_temp):
    error_msg = "❌ Error: Translation failed. "
    filename = os.path.basename(docx_file.name)
    if 'worship_program' in filename.lower() or 'worship-program' in filename.lower():
        error_msg += f"\n\nThe file '{filename}' appears to be a previously generated worship program, not a sermon transcript.\n"
        error_msg += "Please upload the ORIGINAL sermon/transcript DOCX file for translation."
    else:
        error_msg += "Please check the DOCX file."
    return error_msg, None
```

---

## Expected Behavior

### ✅ Correct Workflow

1. **Upload ORIGINAL sermon DOCX** (e.g., `sermon_2025-11-09.docx` or `message.docx`)
2. **Upload PDF bulletin** (e.g., `RCCA-worship-bulletin-2025-11-09.pdf`)
3. **System translates sermon DOCX** → Creates `sermon_2025-11-09_bilingual.txt`
4. **Bilingual file contains sermon content** (not worship program content)
5. **Message section uses sermon bilingual content**

### ❌ Wrong Workflow (Now Prevented)

1. **Upload generated worship program DOCX** (e.g., `worship_program_2025-11-09.docx`)
2. **System detects it's a worship program** → Rejects with error message
3. **User must upload original sermon DOCX instead**

---

## How to Fix Existing Issue

If you already have a bilingual file with wrong content:

1. **Delete the incorrect bilingual file**: `worship_program_2025-11-09_bilingual.txt`
2. **Upload the ORIGINAL sermon DOCX file** (not the generated worship program)
3. **Re-run the translation**

---

## Files Modified

- `app.py` - Added filename and content validation

---

**Status**: ✅ **Validation added - system will now reject worship program files**