<?php

namespace App\Http\Controllers;

use App\Exports\InvoicesExport;
use App\Http\Requests\LambdaRequest;

use Illuminate\Http\Request;
use Maatwebsite\Excel\Facades\Excel;

class GennovadcReportController extends Controller
{
    public function __construct()
    {
        $this->middleware('auth');
        $this->_service = 'reports';
        $this->_module = 'gennovadc_reports';
        $this->_viewname = 'gennovadcreport';
        $this->_title = 'My Dc Reports';
        $this->_base_url = '/gennovadcreports';
    }

    public function export(Request $request)
    {
        $type = $request->input('type', 0);
        $month = $request->input('month', date('F Y', strtotime('now')));
        if ($type == 'monthsummary') {
            $monthlyResponse = LambdaRequest::signedrequest('get', 'reports', 'gennovadc_reports/monthly_summary', ['month' => $month]);

            $rows = [];
            $totals = [];
            $headers = [];
            $rawHeaders = [];

            if (!empty($monthlyResponse->data->item) && is_array($monthlyResponse->data->item)) {
                foreach ($monthlyResponse->data->item as $item) {
                    $rawHeaders = array_unique(array_merge($rawHeaders, array_keys((array) $item)));
                }
            }

            usort($rawHeaders, function ($a, $b) {
                return $a === 'product_name' ? -1 : ($b === 'product_name' ? 1 : 0);
            });

            $headers = array_map(function ($key) {
                return ucwords(str_replace('_', ' ', $key));
            }, $rawHeaders);

            foreach ($monthlyResponse->data->item as $item) {
                $row = [];
                foreach ($rawHeaders as $header) {
                    $value = $item->$header ?? '';
                    $row[] = $value;

                    if (is_numeric($item->$header ?? null) && $header !== 'product_name' && $header !== 'percent_ach') {
                        $totals[$header] = ($totals[$header] ?? 0) + $item->$header;
                    }
                }
                $rows[] = $row;
            }

            $totalRow = [];
            foreach ($rawHeaders as $header) {
                if ($header === 'product_name') {
                    $totalRow[] = 'Total';
                } elseif ($header === 'percent_ach' && isset($totals['units_plan']) && $totals['units_plan'] > 0 && isset($totals['units_ach'])) {
                    $totalRow[] = round(($totals['units_ach'] / $totals['units_plan']) * 100) . '%';
                } else {
                    $totalRow[] = $totals[$header] ?? '';
                }
            }
            $rows[] = $totalRow;

            $excelData = [];
            $excelData[] = $headers;
            $excelData = array_merge($excelData, $rows);

            return Excel::download(new InvoicesExport($excelData), $type . '-report.xlsx');
        } elseif ($type == 'weeksummary') {
            $weeklyResponse = LambdaRequest::signedrequest('get', 'reports', 'gennovadc_reports/weekly_summary', ['month' => $month]);
            $weeklyData = $weeklyResponse->data->item ?? [];
            $weeklySummary = [];
            $weeklyTotals = [];

            if (!empty($weeklyData)) {
                $firstItem = (array) $weeklyData[0];

                foreach ($firstItem as $key => $value) {
                    $label = ucwords(str_replace(['_', '-'], ' ', $key));
                    $weeklySummary[] = [
                        'label' => $label,
                        'key' => $key,
                    ];
                    if (is_numeric($value)) {
                        $weeklyTotals[$key] = 0;
                    }
                }

                foreach ($weeklyData as $item) {
                    foreach ($weeklyTotals as $key => $_) {
                        $weeklyTotals[$key] += $item->$key ?? 0;
                    }
                }
            }

            $excelData = [];
            $excelData[] = array_column($weeklySummary, 'label');
            foreach ($weeklyData as $row) {
                $rowData = [];
                foreach ($weeklySummary as $col) {
                    $val = $row->{$col['key']} ?? '';
                    $rowData[] = is_numeric($val) ? (float) $val : $val;
                }
                $excelData[] = $rowData;
            }

            if (!empty($weeklyData)) {
                $totalRow = [];
                foreach ($weeklySummary as $col) {
                    if ($col['key'] === 'product_name') {
                        $totalRow[] = 'Total';
                    } elseif ($col['key'] === 'percent_ach') {
                        $totalRow[] = $weeklyTotals['month_plan'] > 0 ? round(($weeklyTotals['units_ach'] / $weeklyTotals['month_plan']) * 100) . '%' : '0.00%';
                    } else {
                        $totalRow[] = $weeklyTotals[$col['key']] ?? 0;
                    }
                }
                $excelData[] = $totalRow;
            }

            return Excel::download(new InvoicesExport($excelData), 'weekly-summary.xlsx');
        } elseif ($type == 'centersummary') {
            $centerResponse = LambdaRequest::signedrequest('get', 'reports', 'gennovadc_reports/center_summary', ['month' => $month]);

            $centerSummarySubmission = $centerResponse->data->item ?? [];
            $centerTotals = $centerResponse->data->total ?? null;

            $centerSummary = [];
            $excelData = [];

            if (!empty($centerSummarySubmission)) {
                $firstItem = (array) $centerSummarySubmission[0];
                foreach ($firstItem as $key => $val) {
                    $label = ucwords(str_replace(['_', '-'], ' ', $key));
                    $centerSummary[] = [
                        'label' => $label,
                        'key' => $key,
                    ];
                }

                $excelData[] = array_column($centerSummary, 'label');

                foreach ($centerSummarySubmission as $row) {
                    $rowData = [];
                    foreach ($centerSummary as $col) {
                        $val = $row->{$col['key']} ?? '';
                        $rowData[] = is_numeric($val) ? (float) $val : $val;
                    }
                    $excelData[] = $rowData;
                }

                if ($centerTotals) {
                    $totalRow = [];
                    foreach ($centerSummary as $index => $col) {
                        if ($index === 0) {
                            $totalRow[] = 'Total';
                            continue;
                        }

                        $key = $col['key'];
                        if ($key === 'percent_ach') {
                            $plan = $centerTotals->centers_plan ?? 0;
                            $ach = $centerTotals->centers_ach ?? 0;
                            $percent = $plan > 0 ? round(($ach / $plan) * 100) : 0;
                            $totalRow[] = $percent . '%';
                        } else {
                            $val = $centerTotals->{$key} ?? 0;
                            $totalRow[] = (float) $val;
                        }
                    }
                    $excelData[] = $totalRow;
                }
            }

            return Excel::download(new InvoicesExport($excelData), 'center-summary.xlsx');
        } elseif ($type == 'centertrendsummary') {
            $centerTrendResponse = LambdaRequest::signedrequest('get', 'reports', 'gennovadc_reports/center_trend_summary');
            $centerTrendSummarySubmission = $centerTrendResponse->data->item ?? [];
            $centerTrendTotals = [];
            $monthKeys = [];

            $centerTrendTotals = (array) ($centerTrendResponse->data->total ?? []);
            $rawMonthKeys = array_keys($centerTrendTotals);

            $year = 25;
            $currentYear = date('y');
            $centerTrendSummary = [['name' => 'Product Name', 'key' => 'product_name']];
            foreach ($rawMonthKeys as $month) {
                $monthUpper = strtoupper($month);

                if ($year == $currentYear && in_array($monthUpper, ['JAN','FEB','MAR','APR','MAY','JUN'])) {
                    continue;
                }

                if ($month === 'JAN') {
                    $year++;
                }
                $displayKey = $month . '-' . $year;
                $centerTrendSummary[] = ['name' => $displayKey, 'key' => $month];
            }

            $excelData = [];
            $excelData[] = array_column($centerTrendSummary, 'name'); // header row

            // Data rows
            foreach ($centerTrendSummarySubmission as $row) {
                $rowData = [];
                foreach ($centerTrendSummary as $col) {
                   
                    $val = isset($row->{$col['key']}) ? $row->{$col['key']} : '';
                    $rowData[] = $val;
                }
                $excelData[] = $rowData;
            }

            // Total row
            if (!empty($centerTrendSummarySubmission)) {
                $totalRow = ['Total'];
                foreach (array_slice($centerTrendSummary, 1) as $col) {
                    $val = $centerTrendTotals[$col['key']] ?? 0;
                    $totalRow[] = $val;
                }
                $excelData[] = $totalRow;
            }

            return Excel::download(new InvoicesExport($excelData), 'center-trend-summary.xlsx');
        } elseif ($type == 'unittrendsummary') {
            $unitTrendResponse = LambdaRequest::signedrequest('get', 'reports', 'gennovadc_reports/unit_trend_summary');
            $unitTrendSummarySubmission = $unitTrendResponse->data->item ?? [];
            $unitTrendTotals = [];
            $monthKeys = [];

            if (!empty($unitTrendSummarySubmission)) {
                $firstItem = (array) $unitTrendSummarySubmission[0];
                $monthKeys = array_filter(array_keys($firstItem), fn($key) => $key !== 'product_name');

                foreach ($monthKeys as $month) {
                    $unitTrendTotals[$month] = 0;
                }

                foreach ($unitTrendSummarySubmission as $item) {
                    foreach ($monthKeys as $month) {
                        $unitTrendTotals[$month] += $item->{$month} ?? 0;
                    }
                }
            }

            $unitTrendSummary = [['name' => 'Product Name', 'key' => 'product_name']];
            $year = 25;
            $currentYear = date('y');
            foreach ($monthKeys as $month) {
                $monthUpper = strtoupper($month);

                if ($year == $currentYear && in_array($monthUpper, ['JAN','FEB','MAR','APR','MAY','JUN'])) {
                    continue;
                }

                if ($month === 'JAN') {
                    $year++;
                }
                $displayKey = $month . '-' . $year; // visible in Excel
                $unitTrendSummary[] = ['name' => $displayKey, 'key' => $month]; // key stays raw
            }
            $excelData = [];
            $excelData[] = array_column($unitTrendSummary, 'name');
            foreach ($unitTrendSummarySubmission as $row) {
                $rowData = [];
                foreach ($unitTrendSummary as $col) {
                    $val = $row->{$col['key']} ?? '';
                    $rowData[] = is_numeric($val) ? (float) $val : $val;
                }
                $excelData[] = $rowData;
            }

            if (!empty($unitTrendSummarySubmission)) {
                $totalRow = ['Total'];
                foreach (array_slice($unitTrendSummary, 1) as $col) {
                    $val = $unitTrendTotals[$col['key']] ?? 0;
                    $totalRow[] = (float) $val;
                }
                $excelData[] = $totalRow;
            }

            return Excel::download(new InvoicesExport($excelData), 'unit-trend-summary.xlsx');
        } else {
        }
    }

    public function dashboard(Request $request)
    {
        // month
        $month = $request->input('month', date('F Y', strtotime('now')));
        $monthlyResponse = LambdaRequest::signedrequest('get', 'reports', 'gennovadc_reports/monthly_summary', ['month' => $month]);
        
        $monthSummary = [];
        $numericKeys = [];

        if (!empty($monthlyResponse->data->item)) {
            $firstItem = (array) $monthlyResponse->data->item[0];
            foreach ($firstItem as $key => $val) {
                $monthSummary[] = ['name' => ucwords(str_replace('_', ' ', $key)), 'key' => $key];
                if ($key !== 'product_name' && is_numeric($val)) {
                    $numericKeys[] = $key;
                }
            }
        }

        $totals = [];
        foreach ($numericKeys as $key) {
            $totals[$key] = 0;
        }

        foreach ($monthlyResponse->data->item as $item) {
            foreach ($numericKeys as $key) {
                $totals[$key] += $item->{$key} ?? 0;
            }
        }

        // week
        $weeklyResponse = LambdaRequest::signedrequest('get', 'reports', 'gennovadc_reports/weekly_summary', ['month' => $month]);
        $weeklyData = $weeklyResponse->data->item ?? [];
        $weeklySummary = [];
        $weeklyTotals = [];
        if (!empty($weeklyData)) {
            $firstItem = (array) $weeklyData[0];

            foreach ($firstItem as $key => $value) {
                $label = ucwords(str_replace(['_', '-'], ' ', $key));

                $weeklySummary[] = [
                    'label' => $label,
                    'key' => $key,
                ];

                if (is_numeric($value)) {
                    $weeklyTotals[$key] = 0;
                }
            }

            foreach ($weeklyData as $item) {
                foreach ($weeklyTotals as $key => $_) {
                    $weeklyTotals[$key] += $item->$key ?? 0;
                }
            }
        }

        // center
        $centerResponse = LambdaRequest::signedrequest('get', 'reports', 'gennovadc_reports/center_summary', ['month' => $month]);
        $centerSummarySubmission = $centerResponse->data->item ?? [];
        $centerTotals = $centerResponse->data->total ?? null;

        $centerSummary = [];

        if (!empty($centerSummarySubmission)) {
            $firstItem = (array) $centerSummarySubmission[0];
            foreach ($firstItem as $key => $val) {
                $label = ucwords(str_replace(['_', '-'], ' ', $key));
                $centerSummary[] = ['name' => $label, 'key' => $key];
            }
        }

        // centertrend
        $centerTrendResponse = LambdaRequest::signedrequest('get', 'reports', 'gennovadc_reports/center_trend_summary');
        $centerTrendSummarySubmission = $centerTrendResponse->data->item ?? [];
        $centerTrendTotals = [];
        $centerTrendTotals = (array) ($centerTrendResponse->data->total ?? []);
        $monthKeys = array_keys($centerTrendTotals);
        $year = 25;
        $currentYear = date('y');
        $centerTrendSummary = [['name' => 'Product Name', 'key' => 'product_name']];
        foreach ($monthKeys as $month) {
            $monthUpper = strtoupper($month);

            if ($year == $currentYear && in_array($monthUpper, ['JAN','FEB','MAR','APR','MAY','JUN'])) {
                continue;
            }

            if ($month === 'JAN') {
                $year++;
            }
            $centerTrendSummary[] = ['name' => $month . '-' . $year, 'key' => $month];
        }

        $unitTrendResponse = LambdaRequest::signedrequest('get', 'reports', 'gennovadc_reports/unit_trend_summary');
        $unitTrendSummarySubmission = $unitTrendResponse->data->item ?? [];
        $unitTrendTotals = [];

        if (!empty($unitTrendSummarySubmission)) {
            $firstItem = (array) $unitTrendSummarySubmission[0];
            $rawMonthKeys = array_filter(array_keys($firstItem), fn($key) => $key !== 'product_name');

            // keep totals indexed by raw month
            foreach ($rawMonthKeys as $month) {
                $unitTrendTotals[$month] = 0;
            }

            foreach ($unitTrendSummarySubmission as $item) {
                foreach ($rawMonthKeys as $month) {
                    $unitTrendTotals[$month] += $item->{$month} ?? 0;
                }
            }

            // build month headers with year suffix
            $year = 25;
            $currentYear = date('y');

            $unitTrendSummary = [['name' => 'Product Name', 'key' => 'product_name']];
            foreach ($rawMonthKeys as $month) {
            $monthUpper = strtoupper($month);

                if ($year == $currentYear && in_array($monthUpper, ['JAN','FEB','MAR','APR','MAY','JUN'])) {
                    continue;
                }

                if ($month === 'JAN') {
                    $year++;
                }
                $displayKey = $month . '-' . $year;
                $unitTrendSummary[] = ['name' => $displayKey, 'key' => $month];
            }
        } else {
            $rawMonthKeys = [];
            $unitTrendSummary = [['name' => 'Product Name', 'key' => 'product_name']];
        }


        return view($this->_viewname . '.dashboard', [
            'title' => 'My Dc Dashboard',
            'month' => $month,

            'monthsummary' => $monthSummary,
            'monthsummarysubmission' => $monthlyResponse->data->item ?? [],
            'monthTotals' => $totals,

            'weeklysummarysubmission' => $weeklyResponse->data->item ?? [],
            'weeklysummary' => $weeklySummary,
            'weeklyTotals' => $weeklyTotals,

            'centersummarysubmission' => $centerSummarySubmission,
            'centersummary' => $centerSummary,
            'centerTotals' => $centerTotals,

            'centertrendsummarysubmission' => $centerTrendSummarySubmission,
            'centertrendsummary' => $centerTrendSummary,
            'centerTrendTotals' => $centerTrendTotals,

            'unittrendsummarysubmission' => $unitTrendSummarySubmission,
            'unittrendsummary' => $unitTrendSummary,
            'unitTrendTotals' => $unitTrendTotals,
        ]);
    }
}