<?php
defined('BASEPATH') OR exit('No direct script access allowed');
class PayrollService
{
 private $CI;public function __construct(){$this->CI=&get_instance();$this->CI->load->library(array('FormulaService','PostingService','FiscalPeriodService','AccountMappingService'));}
 private function period($id){$p=$this->CI->db->query('SELECT * FROM k_payroll_periods WHERE id=? FOR UPDATE',array($id))->row();if(!$p)throw new BusinessException('Periode payroll tidak ditemukan.');return$p;}
 public function calculate($month,$uid){$start=$month.'-01';$end=date('Y-m-t',strtotime($start));$db=$this->CI->db;$db->trans_begin();try{$locked=$db->get_where('attendance_period_locks',array('period'=>$month,'status'=>'locked'))->row();if(!$locked)throw new BusinessException('Absensi bulan '.$month.' harus dikunci sebelum payroll dihitung.');$p=$db->get_where('k_payroll_periods',array('start_date'=>$start,'end_date'=>$end))->row();if($p&&$p->workflow_status!=='draft')throw new BusinessException('Periode payroll bukan draft.');if(!$p){$db->insert('k_payroll_periods',array('period_name'=>date('F Y',strtotime($start)),'start_date'=>$start,'end_date'=>$end,'status'=>'draft','workflow_status'=>'draft','generated_at'=>date('Y-m-d H:i:s')));$pid=$db->insert_id();}else$pid=$p->id;$components=$db->where('is_active',1)->get('payroll_components')->result();foreach($db->where('is_active',1)->get('k_employees')->result()as$e){$att=$db->query("SELECT COUNT(*) work_days,SUM(attendance_status IN('present','late')) present_days,SUM(attendance_status='alpha') unpaid_days,COALESCE(SUM(overtime_hours),0) overtime_hours FROM k_attendances WHERE employee_id=? AND attendance_date BETWEEN ? AND ?",array($e->id,$start,$end))->row();$vars=array('basic_salary'=>(float)$e->basic_salary,'calendar_days'=>(int)date('t',strtotime($start)),'work_days'=>(float)$att->work_days,'present_days'=>(float)$att->present_days,'unpaid_days'=>(float)$att->unpaid_days,'overtime_hours'=>(float)$att->overtime_hours,'overtime_rate'=>(float)(app_env('PAYROLL_OVERTIME_RATE',25000)?:25000),'daily_rate'=>(float)$e->basic_salary/max(1,(int)date('t',strtotime($start))));$pay=$db->get_where('k_payrolls',array('payroll_period_id'=>$pid,'employee_id'=>$e->id))->row();$data=array('payroll_period_id'=>$pid,'employee_id'=>$e->id,'basic_salary'=>$e->basic_salary,'total_work_days'=>$att->work_days,'total_present'=>$att->present_days,'total_alpha'=>$att->unpaid_days,'total_overtime_hours'=>$att->overtime_hours);if($pay){$db->where('id',$pay->id)->update('k_payrolls',$data);$payid=$pay->id;$db->where('payroll_id',$payid)->delete('payroll_calculation_lines');}else{$db->insert('k_payrolls',$data);$payid=$db->insert_id();}$earn=$deduct=$employer=0;foreach($components as$c){$override=$db->where('employee_id',$e->id)->where('component_id',$c->id)->where('is_active',1)->where('effective_from <=',$end)->group_start()->where('effective_to IS NULL',null,false)->or_where('effective_to >=',$start)->group_end()->order_by('effective_from','DESC')->get('employee_payroll_components')->row();$amount=$override&&$override->amount_override!==null?(float)$override->amount_override:($c->fixed_amount!==null?(float)$c->fixed_amount:$this->CI->formulaservice->calculate($c->formula_expression,$vars));if($c->code==='BASIC'&&$c->prorated&&$e->join_date>$start&&$e->join_date<=$end)$amount=round($amount*(date('t',strtotime($start))-date('d',strtotime($e->join_date))+1)/date('t',strtotime($start)),2);if(abs($amount)<.01)continue;$db->insert('payroll_calculation_lines',array('payroll_id'=>$payid,'component_id'=>$c->id,'component_code'=>$c->code,'component_name'=>$c->name,'component_type'=>$c->component_type,'base_amount'=>$e->basic_salary,'amount'=>$amount,'formula_snapshot'=>$c->formula_expression,'expense_account_id'=>$c->expense_account_id,'liability_account_id'=>$c->liability_account_id));if($c->component_type==='earning')$earn+=$amount;elseif($c->component_type==='deduction')$deduct+=$amount;else$employer+=$amount;}$net=$earn-$deduct;$snap=json_encode(array('variables'=>$vars,'gross'=>$earn,'deductions'=>$deduct,'net'=>$net));$db->where('id',$payid)->update('k_payrolls',array('gross_salary'=>$earn,'total_deductions'=>$deduct,'total_salary'=>$net,'calculation_snapshot'=>$snap,'version'=>isset($pay->version)?$pay->version+1:1));}$hash=hash('sha256',json_encode($db->select('p.id,p.total_salary,p.version')->from('k_payrolls p')->where('payroll_period_id',$pid)->order_by('p.id')->get()->result_array()));$db->where('id',$pid)->update('k_payroll_periods',array('calculation_hash'=>$hash));$db->trans_commit();return$pid;}catch(Throwable$e){$db->trans_rollback();throw$e;}}
 public function workflow($id,$action,$uid){$db=$this->CI->db;$db->trans_begin();try{$p=$this->period($id);$map=array('review'=>array('draft','reviewed'), 'approve'=>array('reviewed','approved'), 'finalize'=>array('approved','final'));if(!isset($map[$action])||$p->workflow_status!==$map[$action][0])throw new BusinessException('Transisi payroll tidak valid.');if($action!=='review'&&(int)($action==='approve'?$p->reviewed_by:$p->approved_by)===(int)$uid)throw new BusinessException('Reviewer/approver berikutnya harus user berbeda.');$up=array('workflow_status'=>$map[$action][1],$action==='review'?'reviewed_by':($action==='approve'?'approved_by':'finalized_by')=>$uid,$action==='review'?'reviewed_at':($action==='approve'?'approved_at':'finalized_at')=>date('Y-m-d H:i:s'));$db->where('id',$id)->update('k_payroll_periods',$up);$db->trans_commit();}catch(Throwable$e){$db->trans_rollback();throw$e;}}
 public function post($id,$date,$uid){$db=$this->CI->db;$db->trans_begin();try{$p=$this->period($id);if($p->workflow_status!=='final'||$p->journal_id)throw new BusinessException('Payroll belum final atau sudah diposting.');$this->CI->fiscalperiodservice->assertOpen($date);$gross=(float)$db->select('COALESCE(SUM(gross_salary),0)t',false)->get_where('k_payrolls',array('payroll_period_id'=>$id))->row()->t;$ded=(float)$db->select('COALESCE(SUM(total_deductions),0)t',false)->get_where('k_payrolls',array('payroll_period_id'=>$id))->row()->t;$net=$gross-$ded;$lines=array(array('account_id'=>$this->CI->accountmappingservice->get('payroll_expense'),'debit'=>$gross,'kredit'=>0));if($ded>0)$lines[]=array('account_id'=>$this->CI->accountmappingservice->get('payroll_tax_payable'),'debit'=>0,'kredit'=>$ded);$lines[]=array('account_id'=>$this->CI->accountmappingservice->get('payroll_payable'),'debit'=>0,'kredit'=>$net);$jid=$this->CI->postingservice->post(array('tanggal'=>$date,'no_ref'=>'PAYROLL-'.str_replace('-','',$p->start_date),'keterangan'=>'Payroll register '.$p->period_name.'; karyawan '.$db->where('payroll_period_id',$id)->count_all_results('k_payrolls').'; bruto Rp '.number_format($gross,2,'.','').' neto Rp '.number_format($net,2,'.',''),'ref_type'=>'payroll','ref_id'=>$id,'created_by'=>$uid),$lines,false,true);$db->where('id',$id)->update('k_payroll_periods',array('workflow_status'=>'posted','journal_id'=>$jid));$db->trans_commit();return$jid;}catch(Throwable$e){$db->trans_rollback();throw$e;}}
 public function pay($id,$date,$cashAccountId,$uid){$db=$this->CI->db;$db->trans_begin();try{$p=$this->period($id);if($p->workflow_status!=='posted')throw new BusinessException('Payroll belum diposting atau sudah dibayar.');if($db->get_where('payroll_payments',array('payroll_period_id'=>$id))->row())throw new BusinessException('Pembayaran payroll sudah tersedia.');$cash=$db->query('SELECT * FROM cash_accounts WHERE id=? FOR UPDATE',array($cashAccountId))->row();if(!$cash)throw new BusinessException('Rekening pembayaran tidak ditemukan.');$this->CI->fiscalperiodservice->assertOpen($date);$net=(float)$db->select('COALESCE(SUM(total_salary),0)t',false)->get_where('k_payrolls',array('payroll_period_id'=>$id))->row()->t;$no='PRP-'.date('YmdHis');$journal=$this->CI->postingservice->post(array('tanggal'=>$date,'no_ref'=>$no,'keterangan'=>'Pembayaran payroll '.$p->period_name.' melalui '.$cash->name.'; total neto Rp '.number_format($net,2,'.',''),'ref_type'=>'payroll_payment','ref_id'=>$id,'created_by'=>$uid),array(array('account_id'=>$this->CI->accountmappingservice->get('payroll_payable'),'debit'=>$net,'kredit'=>0),array('account_id'=>$cash->gl_account_id,'debit'=>0,'kredit'=>$net)),false,true);$db->insert('payroll_payments',array('payroll_period_id'=>$id,'payment_no'=>$no,'payment_date'=>$date,'cash_account_id'=>$cashAccountId,'total_amount'=>$net,'status'=>'posted','journal_id'=>$journal,'created_by'=>$uid,'approved_by'=>$uid,'posted_at'=>date('Y-m-d H:i:s')));$paymentId=$db->insert_id();$db->where('id',$id)->update('k_payroll_periods',array('workflow_status'=>'paid','payment_transaction_id'=>$paymentId));$db->trans_commit();return$journal;}catch(Throwable$e){$db->trans_rollback();throw$e;}}
}