<?php

namespace App\Observers;

use App\Models\ActivityLog;
use App\Models\Approval;
use App\Models\CashRecord;
use App\Models\Vote;
use Illuminate\Support\Facades\Auth;

class CashRecordObserver
{
    public function created(CashRecord $record): void
    {
        ActivityLog::create([
            'user_id'     => Auth::id(),
            'action'      => 'created',
            'model_type'  => CashRecord::class,
            'model_id'    => $record->id,
            'description' => "Transaksi kas baru: {$record->description} sebesar Rp " . number_format($record->amount, 0, ',', '.'),
        ]);

        // Threshold: 500rb–2jt → buat approval ketua
        if ($record->amount >= 500_000 && $record->amount <= 2_000_000) {
            Approval::create([
                'model_type'         => CashRecord::class,
                'model_id'           => $record->id,
                'required_approvals' => 1,
                'status'             => 'pending',
            ]);
        }

        // Threshold: > 2jt → buat voting
        if ($record->amount > 2_000_000) {
            Vote::create([
                'title'      => "Persetujuan Transaksi: {$record->description}",
                'description' => "Transaksi senilai Rp " . number_format($record->amount, 0, ',', '.') . " memerlukan persetujuan voting.",
                'type'       => 'finance',
                'related_id' => $record->id,
                'status'     => 'open',
                'deadline'   => now()->addDays(3),
                'created_by' => Auth::id(),
            ]);
        }
    }

    public function updated(CashRecord $record): void
    {
        if ($record->getOriginal('verified_at') !== null) {
            throw new \Exception('Transaksi yang sudah diverifikasi tidak dapat diubah.');
        }

        if ($record->wasChanged('verified_by') && $record->verified_by !== null) {
            // Pastikan threshold terpenuhi sebelum verifikasi
            if ($record->amount >= 500_000 && $record->amount <= 2_000_000) {
                $approval = Approval::where('model_type', CashRecord::class)
                    ->where('model_id', $record->id)
                    ->first();

                if (! $approval || $approval->status !== 'approved') {
                    throw new \Exception('Transaksi ini memerlukan persetujuan ketua sebelum diverifikasi.');
                }
            }

            if ($record->amount > 2_000_000) {
                $vote = Vote::where('type', 'finance')
                    ->where('related_id', $record->id)
                    ->first();

                $total   = $vote?->items()->count() ?? 0;
                $approve = $vote?->items()->where('choice', 'approve')->count() ?? 0;

                if (! $vote || $vote->status !== 'closed' || $total === 0 || ($approve / $total) <= 0.5) {
                    throw new \Exception('Transaksi ini memerlukan voting dengan mayoritas setuju sebelum diverifikasi.');
                }
            }

            ActivityLog::create([
                'user_id'     => Auth::id(),
                'action'      => 'verified',
                'model_type'  => CashRecord::class,
                'model_id'    => $record->id,
                'description' => "Transaksi kas diverifikasi: {$record->description}",
            ]);
        }
    }

    public function deleting(CashRecord $record): void
    {
        if ($record->verified_at !== null) {
            throw new \Exception('Transaksi yang sudah diverifikasi tidak dapat dihapus.');
        }
    }
}
