<?php

declare(strict_types=1);

namespace App\Repositories;

use App\Models\Employee;
use Core\Repository;

class EmployeeRepository extends Repository
{
    protected string $table = 'employees';
    protected string $primaryKey = 'id';

    public function create(Employee $employee): bool
    {
        return $this->database->execute(
            'INSERT INTO employees (first_name, last_name, email, department, job_title, start_date)
             VALUES (:first_name, :last_name, :email, :department, :job_title, :start_date)',
            [
                'first_name' => $employee->firstName,
                'last_name' => $employee->lastName,
                'email' => $employee->email,
                'department' => $employee->department,
                'job_title' => $employee->jobTitle,
                'start_date' => $employee->startDate,
            ]
        );
    }

    public function findByEmail(string $email): ?array
    {
        return $this->database->first(
            'SELECT * FROM employees WHERE email = :email',
            ['email' => $email]
        );
    }

    /**
     * @return list<array<string, mixed>>
     */
    public function latest(int $limit = 8): array
    {
        $limit = max(1, $limit);

        return $this->database->query(
            "SELECT * FROM employees ORDER BY created_at DESC, id DESC LIMIT {$limit}"
        );
    }

    /**
     * @return list<array<string, mixed>>
     */
    public function search(string $search = ''): array
    {
        [$whereClause, $parameters] = $this->buildSearchClause($search);

        return $this->database->query(
            'SELECT id, first_name, last_name, email, department, job_title, start_date, created_at
             FROM employees' . $whereClause . '
             ORDER BY created_at DESC, id DESC',
            $parameters
        );
    }

    public function countMatching(string $search = ''): int
    {
        [$whereClause, $parameters] = $this->buildSearchClause($search);
        $row = $this->database->first(
            'SELECT COUNT(*) AS total FROM employees' . $whereClause,
            $parameters
        );

        return (int) ($row['total'] ?? 0);
    }

    public function countDepartments(string $search = ''): int
    {
        [$whereClause, $parameters] = $this->buildSearchClause($search);
        $row = $this->database->first(
            'SELECT COUNT(DISTINCT department) AS total FROM employees' . $whereClause,
            $parameters
        );

        return (int) ($row['total'] ?? 0);
    }

    public function newestMatching(string $search = ''): ?array
    {
        [$whereClause, $parameters] = $this->buildSearchClause($search);

        return $this->database->first(
            'SELECT id, first_name, last_name, department, job_title, start_date
             FROM employees' . $whereClause . '
             ORDER BY created_at DESC, id DESC
             LIMIT 1',
            $parameters
        );
    }

    /**
     * @return array{0:string,1:array<string,string>}
     */
    private function buildSearchClause(string $search): array
    {
        $search = trim($search);

        if ($search === '') {
            return ['', []];
        }

        return [
            ' WHERE first_name LIKE :search
                OR last_name LIKE :search
                OR email LIKE :search
                OR department LIKE :search
                OR job_title LIKE :search
                OR start_date LIKE :search',
            ['search' => '%' . $search . '%'],
        ];
    }
}