<?php

namespace Controllers;

use Libs\Payload;
use Libs\Validator;
use Models\SlaConfigsModel;
use Models\UserModel;
use Psr\Http\Message\ServerRequestInterface;

class SlaSaveConfigController
{
    private UserModel $userModel;
    private SlaConfigsModel $slaConfigsModel;

    public function __construct()
    {
        $this->userModel = new UserModel();
        $this->slaConfigsModel = new SlaConfigsModel();
    }

    public function __invoke(ServerRequestInterface $request)
    {
        $userId = (int) ($request->getAttribute('user_id') ?? 0);
        if ($userId <= 0) {
            return Payload::fail('Unauthorized: Missing authenticated user', [], 'E_VALIDATE', 401);
        }

        $body = json_decode((string) $request->getBody(), true) ?: [];
        $id = trim((string) ($body['id'] ?? ''));
        $name = trim((string) ($body['name'] ?? ''));
        $firstResponseH = $body['firstResponseH'] ?? null;
        $firstResponseM = $body['firstResponseM'] ?? null;
        $resolutionH = $body['resolutionH'] ?? null;
        $alertPct = $body['alertPct'] ?? null;

        $validator = (new Validator([
            'firstResponseH' => $firstResponseH,
            'firstResponseM' => $firstResponseM,
            'resolutionH' => $resolutionH,
            'alertPct' => $alertPct,
            'name' => $name,
        ]))
            ->required('firstResponseH')->intRange('firstResponseH', 0, 72)
            ->required('firstResponseM')->intRange('firstResponseM', 0, 59)
            ->required('resolutionH')->intRange('resolutionH', 1, 720)
            ->required('alertPct')->intRange('alertPct', 1, 99)
            ->maxLength('name', 20);

        if ($id === '') {
            $validator->required('name');
        }

        if ($validator->fails()) {
            return Payload::fail($validator->firstError() ?? 'Invalid payload', [], 'E_VALIDATE', 400);
        }

        $companyId = $this->userModel->getCompanyIdByUserId($userId);
        if ($companyId === null) {
            return Payload::fail('User not found', [], 'E_NOT_FOUND', 404);
        }

        try {
            $result = $this->slaConfigsModel->saveConfig($companyId, $body);
        } catch (\Throwable $e) {
            return Payload::fail('Failed to save SLA config', [], 'E_GENERIC', 500);
        }

        if (($result['status'] ?? '') === 'not_found') {
            return Payload::fail('SLA config not found', [], 'E_NOT_FOUND', 404);
        }

        if (($result['status'] ?? '') === 'invalid') {
            return Payload::fail('Invalid payload', [], 'E_VALIDATE', 400);
        }

        if (($result['status'] ?? '') === 'duplicate') {
            return Payload::fail('Department already has an SLA config', [], 'E_VALIDATE', 400);
        }

        if (($result['status'] ?? '') === 'error' || !isset($result['item'])) {
            return Payload::fail('Failed to save SLA config', [], 'E_GENERIC', 500);
        }

        if (($result['status'] ?? '') === 'created') {
            return Payload::ok($result['item'], 'S_CREATED', 'SLA config created.');
        }

        return Payload::ok($result['item'], 'S_OK', 'SLA config updated.');
    }
}