Convert into MVC and optimize the code

app/Controllers/dashboard_controller.py

@@ -0,0 +1,59 @@
+from flask import request, render_template
+from sqlalchemy import func, cast, Float
+from flask_login import login_required
+from app.models import Task
+from app import db
+
+
+def dashboard_controller():
+
+    selected_block = request.args.getlist('block[]', None)
+
+    rate_col = cast(Task.rate, Float)
+    qty_col = cast(Task.in_this_ra_bill_qty, Float)
+
+    query = db.session.query(
+        Task.block_name.label("block_name"),
+        Task.village_name.label("village_name"),
+        func.sum(cast(Task.boq_amount, Float)).label("total_boq_amount"),
+        func.sum(cast(Task.previous_billing_amount, Float)).label("prev_billed_amount"),
+        func.sum(cast(Task.variation_amount, Float)).label("total_variation_amount"),
+        func.sum(cast(Task.cumulative_billed_qty, Float)).label("cumulative_billed_qty"),
+        func.sum(
+            cast(Task.cumulative_billed_qty, Float) *
+            cast(Task.rate, Float)
+        ).label("cumulative_billed_amount"),
+        func.sum(qty_col).label("in_this_ra_bill_qty"),
+        func.sum(rate_col * qty_col).label("to_be_claimed_amount")
+    )
+
+    if selected_block and "All" not in selected_block:
+        query = query.filter(Task.block_name.in_(selected_block))
+
+    query = query.group_by(Task.block_name, Task.village_name)
+    villages = query.all()
+
+    village_data = []
+    for village in villages:
+        village_data.append({
+            "block_name": village.block_name,
+            "village_name": village.village_name,
+            "total_boq_amount": village.total_boq_amount or 0,
+            "rate": "-",
+            "prev_billed_amount": village.prev_billed_amount or 0,
+            "total_variation_amount": village.total_variation_amount or 0,
+            "cumulative_billed_qty": village.cumulative_billed_qty or 0,
+            "cumulative_billed_amount": village.cumulative_billed_amount or 0,
+            "in_this_ra_bill_qty": village.in_this_ra_bill_qty or 0,
+            "to_be_claimed_amount": round(village.to_be_claimed_amount or 0, 2)
+        })
+
+    blocks = db.session.query(Task.block_name).distinct().all()
+    block_list = ["All"] + [block[0] for block in blocks]
+
+    return render_template(
+        'index.html',
+        villages=village_data,
+        blocks=block_list,
+        selected_block=selected_block
+    )