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dashboard/database/seeders/SurveillanceDataSeeder.php

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+<?php
+
+namespace Database\Seeders;
+
+use Illuminate\Database\Seeder;
+use Carbon\Carbon;
+use App\Models\Surveillance;
+use App\Models\SurveillanceCase;
+use App\Models\CaseLabResult;
+
+class SurveillanceDataSeeder extends Seeder
+{
+    public function run(): void
+    {
+        $provinces = ['Phnom Penh', 'Siem Reap', 'Battambang', 'Kampong Cham'];
+        $pathogens = ['Influenza A', 'Influenza B', 'SARS-CoV-2'];
+
+        $programs = Surveillance::all();
+
+        foreach ($programs as $program) {
+
+            for ($i = 0; $i < 300; $i++) {
+
+                $date = Carbon::now()->subDays(rand(0, 90));
+
+                $case = SurveillanceCase::create([
+                    'lab_code' => uniqid('LAB'),
+                    'case_date' => $date->toDateString(),
+                    'is_newcase' => 1,
+                    'sentinel_site_name' => 'Sentinel Site ' . rand(1, 5),
+                    'site_province_name' => $provinces[array_rand($provinces)],
+                    'surveillance_id' => $program->id,
+                    'year_data' => $date->year,
+                    'week_data' => $date->weekOfYear,
+                    'patient_age_inday' => rand(100, 25000),
+                    'patient_sex' => rand(0, 1) ? 'M' : 'F',
+                    'is_alive' => 1,
+                    'patient_privince' => $provinces[array_rand($provinces)]
+                ]);
+
+                foreach ($pathogens as $pathogen) {
+
+                    $positiveRate = $pathogen === 'Influenza A' ? 0.2 :
+                                   ($pathogen === 'Influenza B' ? 0.15 : 0.1);
+
+                    CaseLabResult::create([
+                        'lab_code' => $case->lab_code,
+                        'is_positive' => rand(0, 100) < ($positiveRate * 100) ? 1 : 0,
+                        'pathogen_name' => $pathogen,
+                        'subtype' => null,
+                        'indicator' => null
+                    ]);
+                }
+            }
+        }
+    }
+}