changes of manu bar add report and dashboard

app/routes/dashboard.py

@@ -1,11 +1,67 @@
+import matplotlib
+matplotlib.use("Agg")
 
 from flask import Blueprint, render_template, session, redirect, url_for
+import matplotlib.pyplot as plt
+import io
+import base64
 
 dashboard_bp = Blueprint("dashboard", __name__, url_prefix="/dashboard")
 
+
+def plot_to_base64():
+    img = io.BytesIO()
+    plt.savefig(img, format="png", bbox_inches="tight")
+    plt.close()
+    img.seek(0)
+    return base64.b64encode(img.getvalue()).decode()
+
+
+def bar_chart():
+    categories = ["Trench", "Manhole", "Pipe Laying", "Restoration"]
+    values = [120, 80, 150, 60]
+
+    plt.figure()
+    plt.bar(categories, values)
+    plt.title("Work Category Report")
+    plt.xlabel("Category")
+    plt.ylabel("Count")
+
+    return plot_to_base64()
+
+
+def pie_chart():
+    labels = ["Completed", "In Progress", "Pending"]
+    sizes = [65, 20, 15]
+
+    plt.figure()
+    plt.pie(sizes, labels=labels, autopct="%1.1f%%", startangle=140)
+    plt.title("Project Status")
+
+    return plot_to_base64()
+
+
+def histogram_chart():
+    daily_work = [5, 10, 15, 20, 20, 25, 30, 35, 40, 45, 50]
+
+    plt.figure()
+    plt.hist(daily_work, bins=5)
+    plt.title("Daily Work Distribution")
+    plt.xlabel("Work Units")
+    plt.ylabel("Frequency")
+
+    return plot_to_base64()
+
+
 @dashboard_bp.route("/")
 def dashboard():
     if not session.get("user_id"):
         return redirect(url_for("auth.login"))
 
-    return render_template("dashboard.html", title="Dashboard")
+    return render_template(
+        "dashboard.html",
+        title="Dashboard",
+        bar_chart=bar_chart(),
+        pie_chart=pie_chart(),
+        histogram=histogram_chart()
+    )