Create app.py

app.py

@@ -0,0 +1,106 @@
+import gradio as gr
+import os
+from typing import List, Dict
+import json
+
+# Mock backend functions to simulate AWS Bedrock Agents
+def validate_documents(files: List[str]) -> str:
+    """Simulate Intake Agent: Check if all required docs are present."""
+    required = ["ID", "Pay Stubs", "W-2", "Tax Returns", "Bank Statements", "Offer", "Insurance", "Title"]
+    uploaded = [os.path.basename(f).split(".")[0] for f in files]
+    missing = [doc for doc in required if doc not in uploaded]
+    if missing:
+        return f"Missing documents: {', '.join(missing)}"
+    return "All documents validated successfully."
+
+def extract_data(files: List[str], ssn: str) -> Dict:
+    """Simulate Extraction Agent: Extract data from documents."""
+    return {
+        "application_id": 123,
+        "ssn": ssn,
+        "monthly_income": 5000,
+        "monthly_debts": 1000,
+        "credit_score": 650,
+        "property_value": 300000,
+        "loan_amount": 240000,
+        "insurance_coverage": "12_months",
+        "title_status": "Clear"
+    }
+
+def analyze_data(data: Dict) -> Dict:
+    """Simulate Credit/Capacity/Collateral/Compliance Agents: Analyze data."""
+    dti = (data["monthly_debts"] / data["monthly_income"]) * 100
+    ltv = (data["loan_amount"] / data["property_value"]) * 100
+    flags = []
+    if dti > 45:
+        flags.append("High DTI")
+    if data["credit_score"] < 620:
+        flags.append("Low credit score")
+    if "Clear" not in data["title_status"]:
+        flags.append("Title issue")
+    return {
+        "DTI": round(dti, 2),
+        "LTV": round(ltv, 2),
+        "credit_score": data["credit_score"],
+        "flags": flags,
+        "status": "Needs review" if flags else "Ready for approval"
+    }
+
+def handle_conditions(additional_files: List[str], comments: str) -> str:
+    """Simulate Conditions Agent: Process additional uploads."""
+    if additional_files:
+        return f"Additional files received: {', '.join([os.path.basename(f) for f in additional_files])}. Comments: {comments}"
+    return "No additional files uploaded."
+
+def finalize_approval(approve: bool, comments: str, analysis: Dict) -> str:
+    """Simulate Final Approval Agent: Finalize decision."""
+    if approve and not analysis["flags"]:
+        return "Clear to Close. Closing package generated."
+    elif approve:
+        return f"Approved with conditions: {', '.join(analysis['flags'])}. Comments: {comments}"
+    else:
+        return f"Rejected. Comments: {comments}"
+
+# Gradio Interface
+with gr.Blocks(title="Mortgage Underwriting Automation") as app:
+    gr.Markdown("# Mortgage Underwriting Automation")
+    
+    # Section 1: Document Upload
+    with gr.Row():
+        with gr.Column():
+            gr.Markdown("## Upload Documents")
+            files_input = gr.File(label="Upload Documents (ID, Pay Stubs, W-2s, etc.)", file_count="multiple", file_types=[".pdf", ".png", ".jpg"])
+            ssn_input = gr.Textbox(label="Social Security Number", placeholder="XXX-XX-XXXX")
+            validate_btn = gr.Button("Validate Documents")
+            validate_output = gr.Textbox(label="Validation Result")
+        validate_btn.click(fn=validate_documents, inputs=files_input, outputs=validate_output)
+    
+    # Section 2: Data Extraction and Analysis
+    with gr.Row():
+        with gr.Column():
+            gr.Markdown("## Extracted Data and Analysis")
+            extract_btn = gr.Button("Extract and Analyze")
+            analysis_output = gr.JSON(label="Analysis Results (DTI, LTV, Flags)")
+        extract_btn.click(fn=lambda files, ssn: analyze_data(extract_data(files, ssn)), inputs=[files_input, ssn_input], outputs=analysis_output)
+    
+    # Section 3: Conditions
+    with gr.Row():
+        with gr.Column():
+            gr.Markdown("## Conditions (Additional Documents)")
+            additional_files = gr.File(label="Upload Additional Documents (e.g., Gift Letter)", file_count="multiple", file_types=[".pdf", ".png", ".jpg"])
+            condition_comments = gr.Textbox(label="Comments for Conditions")
+            condition_btn = gr.Button("Submit Additional Documents")
+            condition_output = gr.Textbox(label="Condition Status")
+        condition_btn.click(fn=handle_conditions, inputs=[additional_files, condition_comments], outputs=condition_output)
+    
+    # Section 4: Final Approval
+    with gr.Row():
+        with gr.Column():
+            gr.Markdown("## Final Approval")
+            approve_radio = gr.Radio(choices=["Approve", "Reject"], label="Decision")
+            approval_comments = gr.Textbox(label="Approval/Rejection Comments")
+            approve_btn = gr.Button("Submit Decision")
+            final_output = gr.Textbox(label="Final Status")
+        approve_btn.click(fn=finalize_approval, inputs=[approve_radio, approval_comments, analysis_output], outputs=final_output)
+
+app.launch()