<?php

namespace App\Services\Admin;

use App\Models\Position;
use App\Models\PositionQuota;
use App\Models\PusatMengundi;
use App\Models\SaluranMengundi;
use Illuminate\Support\Facades\DB;
use Illuminate\Validation\ValidationException;

class PusatOperationalSetupService
{
    /**
     * @param  array<string, mixed>  $data
     */
    public function configure(PusatMengundi $pusatMengundi, array $data): void
    {
        DB::transaction(function () use ($pusatMengundi, $data): void {
            $salurans = collect();

            foreach (range(1, (int) $data['saluran_count']) as $number) {
                $salurans->push(SaluranMengundi::query()->updateOrCreate(
                    [
                        'pusat_mengundi_id' => $pusatMengundi->id,
                        'number' => (string) $number,
                    ],
                    [
                        'election_id' => $pusatMengundi->election_id,
                        'name' => null,
                    ],
                ));
            }

            $this->upsertPusatQuotas($pusatMengundi, $data);

            foreach ($salurans as $saluran) {
                $this->upsertSaluranQuotas($pusatMengundi, $saluran, $data);
            }
        });
    }

    /**
     * @param  array<string, mixed>  $data
     */
    private function upsertPusatQuotas(PusatMengundi $pusatMengundi, array $data): void
    {
        foreach ([
            'PPM' => 'ppm_count',
            'PAPM' => 'papm_count',
            'JKM' => 'jkm_count',
            'KKM' => 'kkm_count',
        ] as $code => $field) {
            $this->upsertQuota($pusatMengundi, null, $code, (int) $data[$field]);
        }
    }

    /**
     * @param  array<string, mixed>  $data
     */
    private function upsertSaluranQuotas(PusatMengundi $pusatMengundi, SaluranMengundi $saluran, array $data): void
    {
        foreach ([
            'KTM' => 'ktm_count',
            'POLIS' => 'polis_iring_count',
            'KP' => 'kp_count',
            'KPDP' => 'kpdp_count',
            'CALON_TAMBAHAN' => 'calon_tambahan_count',
        ] as $code => $field) {
            $this->upsertQuota($pusatMengundi, $saluran, $code, (int) $data[$field]);
        }
    }

    private function upsertQuota(PusatMengundi $pusatMengundi, ?SaluranMengundi $saluran, string $positionCode, int $quota): void
    {
        $position = Position::query()->where('code', $positionCode)->first();

        if (! $position instanceof Position) {
            throw ValidationException::withMessages([
                'positions' => 'Jawatan '.$positionCode.' belum dikonfigurasi.',
            ]);
        }

        PositionQuota::query()->updateOrCreate(
            [
                'election_id' => $pusatMengundi->election_id,
                'pusat_mengundi_id' => $pusatMengundi->id,
                'saluran_mengundi_id' => $saluran?->id,
                'position_id' => $position->id,
            ],
            [
                'quota' => $quota,
            ],
        );
    }
}