<?php
namespace app\Controllers;

use app\Models\PayrollModel;
use app\Models\HrPersonModel;
use app\Models\IncomeMasterModel;
use app\Models\DeductionMasterModel;
use app\Models\OfficerTypeModel;

class ReportController extends Controller {

    public function __construct() {
        if (empty($_SESSION['user_id'])) {
            $_SESSION['error'] = 'กรุณาเข้าสู่ระบบก่อนใช้งาน';
            header('Location: ' . BASE_URL . '/login');
            exit;
        }
    }

    public function index() {
        $payrollModel = new PayrollModel();
        
        // Get filter inputs
        $month = $_GET['month'] ?? date('m');
        $year = $_GET['year'] ?? date('Y');
        
        // Fetch payroll data for the selected month/year
        $payrollData = $payrollModel->getSalariesByPeriod($month, $year);
        
        // Fetch matching HR data
        $hrModel = new HrPersonModel();
        $nationalIds = array_column($payrollData, 'national_id');
        $hrData = $hrModel->getPersonsByNationalIds($nationalIds);
        
        // Combine data
        foreach ($payrollData as &$row) {
            $nid = $row['national_id'];
            if (isset($hrData[$nid])) {
                $row['hr_fname'] = $hrData[$nid]['HR_FNAME'];
                $row['hr_lname'] = $hrData[$nid]['HR_LNAME'];
                $row['hr_position'] = $hrData[$nid]['HR_POSITION_NAME'];
                $row['hr_department'] = $hrData[$nid]['HR_DEPARTMENT_SUB_SUB_NAME'];
            }
        }
        
        $this->view('reports/index', [
            'title' => 'ระบบสืบค้นและพิมพ์สลิปเงินเดือน | ' . APP_NAME,
            'activeMenu' => 'reports',
            'month' => $month,
            'year' => $year,
            'payrollData' => $payrollData
        ]);
    }

    public function printSlip() {
        $nationalId = $_GET['national_id'] ?? null;
        $month = $_GET['month'] ?? null;
        $year = $_GET['year'] ?? null;

        if (!$nationalId || !$month || !$year) {
            die('ข้อมูลไม่ครบถ้วน');
        }

        $payrollModel = new PayrollModel();
        $salary = $payrollModel->getSalaryByNationalId($nationalId, $month, $year);
        
        if (!$salary) {
            die('ไม่พบข้อมูลเงินเดือนของบุคคลนี้ในงวดที่เลือก');
        }

        $incomes = $payrollModel->getEmployeeIncomes($salary['id']);
        $deductions = $payrollModel->getEmployeeDeductions($salary['id']);

        $hrModel = new HrPersonModel();
        $hrData = $hrModel->getPersonByNationalId($nationalId);

        $profileModel = new \app\Models\EmployeeProfileModel();
        $bankProfile = $profileModel->getProfile($nationalId);

        $settingModel = new \app\Models\SystemSettingModel();
        $signatureName = $settingModel->getSetting('signature_name', '( นางณัฐฐิณี เรืองทอง )');
        $signaturePosition = $settingModel->getSetting('signature_position', 'นักวิชาการเงินและบัญชี');
        $signatureScale = $settingModel->getSetting('signature_scale', '100');
        $slipFontSize = $settingModel->getSetting('slip_font_size', '11pt');
        $signaturePosX = $settingModel->getSetting('signature_pos_x', '0');
        $signaturePosY = $settingModel->getSetting('signature_pos_y', '0');

        $this->view('reports/slip', [
            'salary' => $salary,
            'incomes' => $incomes,
            'deductions' => $deductions,
            'hrData' => $hrData,
            'bankProfile' => $bankProfile,
            'signatureName' => $signatureName,
            'signaturePosition' => $signaturePosition,
            'signatureScale' => $signatureScale,
            'slipFontSize' => $slipFontSize,
            'signaturePosX' => $signaturePosX,
            'signaturePosY' => $signaturePosY,
            'month' => $month,
            'year' => $year
        ]);
    }

    public function printTax() {
        $nationalId = $_GET['national_id'] ?? null;
        $year = $_GET['year'] ?? null;

        if (!$nationalId || !$year) {
            die('ข้อมูลไม่ครบถ้วน');
        }

        $payrollModel = new PayrollModel();
        $yearlySummary = $payrollModel->getYearlyTaxSummary($nationalId, $year);
        
        if (!$yearlySummary || $yearlySummary['total_income'] == 0) {
            die('ไม่พบข้อมูลรายได้ในปีที่เลือก');
        }

        $hrModel = new HrPersonModel();
        $hrData = $hrModel->getPersonByNationalId($nationalId);

        $settingModel = new \app\Models\SystemSettingModel();
        $orgTaxId = $settingModel->getSetting('org_tax_id', '');

        $taxSignatureName = $settingModel->getSetting('tax_signature_name', '');
        $taxSignaturePosition = $settingModel->getSetting('tax_signature_position', '');
        $taxSignatureScale = $settingModel->getSetting('tax_signature_scale', '100');
        $taxSignaturePosX = $settingModel->getSetting('tax_signature_pos_x', '0');
        $taxSignaturePosY = $settingModel->getSetting('tax_signature_pos_y', '0');
        $taxFontSize = $settingModel->getSetting('tax_font_size', '11pt');
        $orgAddress = $settingModel->getSetting('org_address', 'ต.อ่างทอง อ.เกาะสมุย จ.สุราษฎร์ธานี 84140');
        $taxPayeeAddress = $settingModel->getSetting('tax_payee_address', 'ต.อ่างทอง อ.เกาะสมุย จ.สุราษฎร์ธานี 84140');

        $this->view('reports/tax', [
            'yearlySummary' => $yearlySummary,
            'hrData' => $hrData,
            'year' => $year,
            'nationalId' => $nationalId,
            'orgTaxId' => $orgTaxId,
            'taxSignatureName' => $taxSignatureName,
            'taxSignaturePosition' => $taxSignaturePosition,
            'taxSignatureScale' => $taxSignatureScale,
            'taxSignaturePosX' => $taxSignaturePosX,
            'taxSignaturePosY' => $taxSignaturePosY,
            'taxFontSize' => $taxFontSize,
            'orgAddress' => $orgAddress,
            'taxPayeeAddress' => $taxPayeeAddress
        ]);
    }

    public function printTaxBulk() {
        $nationalIds = $_POST['national_ids'] ?? [];
        $year = $_POST['year'] ?? null;
        $groupByLetter = isset($_POST['group_by_letter']) && $_POST['group_by_letter'] == '1';

        if (empty($nationalIds) || !$year) {
            die('ข้อมูลไม่ครบถ้วน กรุณาเลือกพนักงานอย่างน้อย 1 รายการ');
        }

        $payrollModel = new PayrollModel();
        $hrModel = new HrPersonModel();
        
        $bulkData = [];

        foreach ($nationalIds as $nationalId) {
            $yearlySummary = $payrollModel->getYearlyTaxSummary($nationalId, $year);
            if ($yearlySummary && $yearlySummary['total_income'] > 0) {
                $hrData = $hrModel->getPersonByNationalId($nationalId);
                $bulkData[] = [
                    'nationalId' => $nationalId,
                    'yearlySummary' => $yearlySummary,
                    'hrData' => $hrData
                ];
            }
        }

        if (empty($bulkData)) {
            die('ไม่พบข้อมูลรายได้ในปีที่เลือกของพนักงานที่เลือกทั้งหมด');
        }

        // Sort data by First Name if grouping by letter is enabled
        if ($groupByLetter) {
            usort($bulkData, function($a, $b) {
                $nameA = $a['hrData']['HR_FNAME'] ?? '';
                $nameB = $b['hrData']['HR_FNAME'] ?? '';
                return strcmp($nameA, $nameB);
            });
        }

        $settingModel = new \app\Models\SystemSettingModel();
        
        $orgTaxId = $settingModel->getSetting('org_tax_id', '');
        $taxSignatureName = $settingModel->getSetting('tax_signature_name', '');
        $taxSignaturePosition = $settingModel->getSetting('tax_signature_position', '');
        $taxSignatureScale = $settingModel->getSetting('tax_signature_scale', '100');
        $taxSignaturePosX = $settingModel->getSetting('tax_signature_pos_x', '0');
        $taxSignaturePosY = $settingModel->getSetting('tax_signature_pos_y', '0');
        $taxFontSize = $settingModel->getSetting('tax_font_size', '11pt');
        $orgAddress = $settingModel->getSetting('org_address', 'ต.อ่างทอง อ.เกาะสมุย จ.สุราษฎร์ธานี 84140');
        $taxPayeeAddress = $settingModel->getSetting('tax_payee_address', 'ต.อ่างทอง อ.เกาะสมุย จ.สุราษฎร์ธานี 84140');

        $this->view('reports/tax_bulk', [
            'bulkData' => $bulkData,
            'year' => $year,
            'groupByLetter' => $groupByLetter,
            'orgTaxId' => $orgTaxId,
            'taxSignatureName' => $taxSignatureName,
            'taxSignaturePosition' => $taxSignaturePosition,
            'taxSignatureScale' => $taxSignatureScale,
            'taxSignaturePosX' => $taxSignaturePosX,
            'taxSignaturePosY' => $taxSignaturePosY,
            'taxFontSize' => $taxFontSize,
            'orgAddress' => $orgAddress,
            'taxPayeeAddress' => $taxPayeeAddress
        ]);
    }

    public function salaryReport() {
        $payrollModel = new PayrollModel();
        $hrModel = new HrPersonModel();
        $officerTypeModel = new OfficerTypeModel();
        
        $month = $_GET['month'] ?? date('m');
        $year = $_GET['year'] ?? date('Y');
        $typeId = $_GET['type_id'] ?? '';
        
        $officerTypes = $officerTypeModel->getActive();
        $selectedTypeName = '';
        if ($typeId) {
            foreach ($officerTypes as $type) {
                if ($type['id'] == $typeId) {
                    $selectedTypeName = $type['name'];
                    break;
                }
            }
        }
        
        $payrollData = $payrollModel->getSalariesByPeriod($month, $year);
        
        $nationalIds = array_column($payrollData, 'national_id');
        $hrData = $hrModel->getPersonsByNationalIds($nationalIds);
        
        $reportData = [];
        foreach ($payrollData as $row) {
            $nid = $row['national_id'];
            if (isset($hrData[$nid])) {
                $personType = $hrData[$nid]['HR_PERSON_TYPE_NAME'] ?? '';
                
                // Filter by type if selected
                if ($typeId && $personType !== $selectedTypeName) {
                    continue;
                }
                
                $row['hr_prefix'] = $hrData[$nid]['HR_PREFIX_NAME'] ?? '';
                $row['hr_fname'] = $hrData[$nid]['HR_FNAME'] ?? '';
                $row['hr_lname'] = $hrData[$nid]['HR_LNAME'] ?? '';
                $row['hr_position'] = $hrData[$nid]['HR_POSITION_NAME'] ?? '';
                $row['hr_department'] = $hrData[$nid]['HR_DEPARTMENT_SUB_SUB_NAME'] ?? '';
                $row['person_type'] = $personType;
                
                // Fetch incomes and deductions to display sums or details if needed
                // But for performance, we can just use the cached totals if available.
                // Wait, if we need specific columns for Excel, we should fetch details.
                // In this case, we fetch them here or in export mode.
                
                $reportData[] = $row;
            }
        }
        
        // Sort by first name (ignoring prefix)
        usort($reportData, function($a, $b) {
            return strcmp($a['hr_fname'], $b['hr_fname']);
        });

        $this->view('reports/salary_report', [
            'title' => 'รายงานเงินเดือน | ' . APP_NAME,
            'activeMenu' => 'report_salary',
            'month' => $month,
            'year' => $year,
            'typeId' => $typeId,
            'officerTypes' => $officerTypes,
            'reportData' => $reportData
        ]);
    }
    
    public function exportExcel() {
        require_once APP_ROOT . '/app/Libraries/SimpleXLSXGen.php';
        
        $payrollModel = new PayrollModel();
        $hrModel = new HrPersonModel();
        $officerTypeModel = new OfficerTypeModel();
        $incomeModel = new IncomeMasterModel();
        $deductionModel = new DeductionMasterModel();
        
        $month = $_GET['month'] ?? date('m');
        $year = $_GET['year'] ?? date('Y');
        $typeId = $_GET['type_id'] ?? '';
        
        $officerTypes = $officerTypeModel->getActive();
        $selectedTypeName = 'ทั้งหมด';
        if ($typeId) {
            foreach ($officerTypes as $type) {
                if ($type['id'] == $typeId) {
                    $selectedTypeName = $type['name'];
                    break;
                }
            }
        }
        
        $payrollData = $payrollModel->getSalariesByPeriod($month, $year);
        $nationalIds = array_column($payrollData, 'national_id');
        $hrData = $hrModel->getPersonsByNationalIds($nationalIds);
        
        // Fetch all income/deduction codes to build dynamic columns
        $allIncomes = $incomeModel->getAllIncomes();
        $allDeductions = $deductionModel->getAllDeductions();
        
        $incomeCols = [];
        foreach ($allIncomes as $inc) {
            $incomeCols[$inc['code']] = $inc['name'];
        }
        
        $deductionCols = [];
        foreach ($allDeductions as $ded) {
            $deductionCols[$ded['code']] = $ded['name'];
        }
        
        $reportData = [];
        foreach ($payrollData as $row) {
            $nid = $row['national_id'];
            if (isset($hrData[$nid])) {
                $personType = $hrData[$nid]['HR_PERSON_TYPE_NAME'] ?? '';
                
                if ($typeId && $personType !== $selectedTypeName) {
                    continue;
                }
                
                $row['hr_prefix'] = $hrData[$nid]['HR_PREFIX_NAME'] ?? '';
                $row['hr_fname'] = $hrData[$nid]['HR_FNAME'] ?? '';
                $row['hr_lname'] = $hrData[$nid]['HR_LNAME'] ?? '';
                
                // Fetch details
                $incomes = $payrollModel->getEmployeeIncomes($row['id']);
                $deductions = $payrollModel->getEmployeeDeductions($row['id']);
                
                $row['incomes_detail'] = [];
                foreach ($incomes as $inc) {
                    $row['incomes_detail'][$inc['income_code']] = $inc['amount'];
                }
                
                $row['deductions_detail'] = [];
                foreach ($deductions as $ded) {
                    $row['deductions_detail'][$ded['deduction_code']] = $ded['amount'];
                }
                
                $reportData[] = $row;
            }
        }
        
        usort($reportData, function($a, $b) {
            return strcmp($a['hr_fname'], $b['hr_fname']);
        });
        
        $monthNames = [
            '01' => 'มกราคม', '02' => 'กุมภาพันธ์', '03' => 'มีนาคม', '04' => 'เมษายน',
            '05' => 'พฤษภาคม', '06' => 'มิถุนายน', '07' => 'กรกฎาคม', '08' => 'สิงหาคม',
            '09' => 'กันยายน', '10' => 'ตุลาคม', '11' => 'พฤศจิกายน', '12' => 'ธันวาคม'
        ];
        $monthName = $monthNames[$month] ?? $month;
        $thaiYear = $year + 543;
        
        $excelData = [];
        
        // Header
        $excelData[] = ["รายงานเงินเดือนเจ้าหน้าที่โรงพยาบาล"];
        $excelData[] = ["ประจำเดือน: $monthName $thaiYear", "", "ประเภท: $selectedTypeName"];
        $excelData[] = [];
        
        // Columns
        $headerRow = ["ลำดับ", "ชื่อ-สกุล", "เงินเดือนหลัก"];
        foreach ($incomeCols as $code => $name) {
            $headerRow[] = $name;
        }
        $headerRow[] = "รวมรายรับ";
        foreach ($deductionCols as $code => $name) {
            $headerRow[] = $name;
        }
        $headerRow[] = "รวมรายจ่าย";
        $headerRow[] = "รับสุทธิ";
        
        $excelData[] = $headerRow;
        
        // Data Rows
        $idx = 1;
        foreach ($reportData as $row) {
            $fullName = trim($row['hr_prefix']) . trim($row['hr_fname']) . ' ' . trim($row['hr_lname']);
            $dataRow = [
                $idx++,
                $fullName,
                $row['base_salary']
            ];
            
            // Incomes
            foreach ($incomeCols as $code => $name) {
                $dataRow[] = $row['incomes_detail'][$code] ?? 0;
            }
            $dataRow[] = $row['total_income'];
            
            // Deductions
            foreach ($deductionCols as $code => $name) {
                $dataRow[] = $row['deductions_detail'][$code] ?? 0;
            }
            $dataRow[] = $row['total_deduction'];
            $dataRow[] = $row['net_salary'];
            
            $excelData[] = $dataRow;
        }
        
        $xlsx = \Shuchkin\SimpleXLSXGen::fromArray($excelData);
        $xlsx->freezePanes('A5');
        
        $filename = "รายงานเงินเดือนเจ้าหน้าที่_{$month}_{$year}.xlsx";
        $xlsx->downloadAs($filename);
        exit;
    }
}