Comparison_Project/app/routes/generate_comparison_report.py

from flask import Blueprint, render_template, request, send_file, flash
import pandas as pd
import io
import re

from app.models.subcontractor_model import Subcontractor
from app.models.trench_excavation_model import TrenchExcavation
from app.models.tr_ex_client_model import TrenchExcavationClient
from app.models.manhole_excavation_model import ManholeExcavation
from app.models.mh_ex_client_model import ManholeExcavationClient
from app.models.manhole_domestic_chamber_model import ManholeDomesticChamber
from app.models.mh_dc_client_model import ManholeDomesticChamberClient

generate_report_bp = Blueprint("generate_report", __name__, url_prefix="/report")


# HEADER FORMATTER
def format_header(header):

    # Handle Client- / Subcontractor-
    if "-" in header:
        prefix, rest = header.split("-", 1)
        prefix = prefix.title()
    else:
        prefix, rest = None, header

    parts = rest.split("_")
    result = []
    i = 0

    while i < len(parts):
        # Detect num_num → num.num
        if i + 1 < len(parts) and parts[i].isdigit() and parts[i + 1].isdigit():
            result.append(f"{parts[i]}.{parts[i + 1]}")
            i += 2
        else:
            result.append(parts[i].title())
            i += 1

    final_text = " ".join(result)
    return f"{prefix}-{final_text}" if prefix else final_text


# LOOKUP CREATOR
def make_lookup(rows, key_field):
    return {
        (r.get("Location"), r.get(key_field)): r
        for r in rows
        if r.get("Location") and r.get(key_field)
    }


# GENERIC COMPARISON BUILDER
def build_comparison(client_rows, contractor_rows, key_field):
    contractor_lookup = make_lookup(contractor_rows, key_field)
    output = []

    for c in client_rows:
        s = contractor_lookup.get((c.get("Location"), c.get(key_field)))
        if not s:
            continue

        client_total = sum(v or 0 for k, v in c.items() if k.endswith("_total"))
        sub_total = sum(v or 0 for k, v in s.items() if k.endswith("_total"))
        diff = client_total - sub_total

        row = {
            "Location": c.get("Location"),
            key_field.replace("_", " "): c.get(key_field)
        }

        # CLIENT DATA
        for k, v in c.items():
            if k in ["id", "created_at"]:
                continue
            row[f"Client-{k}"] = v

        row["Client-Total"] = round(client_total, 2)
        row[" "] = ""

        # SUBCONTRACTOR DATA
        for k, v in s.items():
            if k in ["id", "created_at", "subcontractor_id"]:
                continue
            row[f"Subcontractor-{k}"] = v

        row["Subcontractor-Total"] = round(sub_total, 2)
        row["Diff"] = round(diff, 2)

        output.append(row)

    df = pd.DataFrame(output)
    df.columns = [format_header(col) for col in df.columns]
    return df


# EXCEL SHEET WRITER (SEPARATED)
def write_sheet(writer, df, sheet_name, subcontractor_name):
    workbook = writer.book
    df.to_excel(writer, sheet_name=sheet_name, index=False, startrow=3)
    ws = writer.sheets[sheet_name]

    title_fmt = workbook.add_format({
        "bold": True,
        "font_size": 14
    })

    client_fmt = workbook.add_format({
        "bold": True,
        "border": 1,
        "bg_color": "#D9EDF7"
    })

    sub_fmt = workbook.add_format({
        "bold": True,
        "border": 1,
        "bg_color": "#F7E1D9"
    })

    total_fmt = workbook.add_format({
        "bold": True,
        "border": 1,
        "bg_color": "#FFF2CC"
    })

    diff_fmt = workbook.add_format({
        "bold": True,
        "border": 1,
        "bg_color": "#E2EFDA"
    })

    # MAIN HEADING
    ws.merge_range(
        0, 0, 0, len(df.columns) - 1,
        f"CLIENT vs SUBCONTRACTOR – {subcontractor_name}",
        title_fmt
    )

    # COLUMN HEADERS
    for col_num, col_name in enumerate(df.columns):
        if col_name.startswith("Client-"):
            ws.write(3, col_num, col_name, client_fmt)
        elif col_name.startswith("Subcontractor-"):
            ws.write(3, col_num, col_name, sub_fmt)
        elif col_name.endswith("Total"):
            ws.write(3, col_num, col_name, total_fmt)
        elif col_name == "Diff":
            ws.write(3, col_num, col_name, diff_fmt)
        else:
            ws.write(3, col_num, col_name)

        ws.set_column(col_num, col_num, 20)


# old report generate ROUTE
@generate_report_bp.route("/comparison_report", methods=["GET", "POST"])
def comparison_report():
    subcontractors = Subcontractor.query.all()

    if request.method == "POST":
        subcontractor_id = request.form.get("subcontractor_id")
        if not subcontractor_id:
            flash("Please select subcontractor", "danger")
            return render_template(
                "generate_comparison_report.html",
                subcontractors=subcontractors
            )

        subcontractor = Subcontractor.query.get_or_404(subcontractor_id)

        # ===================== DATA =====================
        tr_client = [r.serialize() for r in TrenchExcavationClient.query.all()]
        tr_sub = [r.serialize() for r in TrenchExcavation.query.filter_by(
            subcontractor_id=subcontractor_id
        ).all()]
        df_tr = build_comparison(tr_client, tr_sub, "MH_NO")

        print("-- tr clint --:",tr_client )
        print("-- tr sub --:",tr_sub )
        
        


        mh_client = [r.serialize() for r in ManholeExcavationClient.query.all()]
        mh_sub = [r.serialize() for r in ManholeExcavation.query.filter_by(
            subcontractor_id=subcontractor_id
        ).all()]
        df_mh = build_comparison(mh_client, mh_sub, "MH_NO")

        # print("-- mh clint --:",mh_client)
        # print("-- mh sub --:",mh_sub )
        

        dc_client = [r.serialize() for r in ManholeDomesticChamberClient.query.all()]
        dc_sub = [r.serialize() for r in ManholeDomesticChamber.query.filter_by(
            subcontractor_id=subcontractor_id
        ).all()]
        df_dc = build_comparison(dc_client, dc_sub, "MH_NO")

        # print("-- mh dc clint --:",dc_client )
        # print("-- mh dc sub --:", dc_sub)
       

        # ===================== EXCEL =====================
        output = io.BytesIO()
        filename = f"{subcontractor.subcontractor_name}_Comparison_Report.xlsx"

        with pd.ExcelWriter(output, engine="xlsxwriter") as writer:
            write_sheet(writer, df_tr, "Tr.Ex", subcontractor.subcontractor_name)
            write_sheet(writer, df_mh, "Mh.Ex", subcontractor.subcontractor_name)
            write_sheet(writer, df_dc, "MH & DC", subcontractor.subcontractor_name)

        output.seek(0)
        return send_file(
            output,
            as_attachment=True,
            download_name=filename,
            mimetype="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
        )

    return render_template(
        "generate_comparison_report.html",
        subcontractors=subcontractors
    )