<?php
declare(strict_types=1);

class CompanyRepository
{
    public static function findByPhoneNumberId(string $phoneNumberId): ?array
    {
        $stmt = db()->prepare("SELECT * FROM companies WHERE phone_number_id = ? AND is_active = 1 LIMIT 1");
        $stmt->execute([$phoneNumberId]);
        $row = $stmt->fetch();
        return $row ?: null;
    }

    public static function findById(int $id): ?array
    {
        $stmt = db()->prepare("SELECT * FROM companies WHERE id = ? LIMIT 1");
        $stmt->execute([$id]);
        $row = $stmt->fetch();
        return $row ?: null;
    }

    public static function findByApiKey(string $apiKey): ?array
    {
        $stmt = db()->prepare("SELECT * FROM companies WHERE api_key = ? AND is_active = 1 LIMIT 1");
        $stmt->execute([$apiKey]);
        $row = $stmt->fetch();
        return $row ?: null;
    }

    public static function findAll(bool $includeInactive = false): array
    {
        $where = $includeInactive ? '1=1' : 'is_active = 1';
        return db()->query("SELECT * FROM companies WHERE {$where} ORDER BY name")->fetchAll();
    }

    /**
     * @throws \RuntimeException with a human-readable message on DB error
     */
    public static function save(array $data): int
    {
        $db = db();
        $id = (int)($data['id'] ?? 0);

        $fields = ['name', 'display_name', 'phone_number_id', 'display_phone', 'api_base_url', 'api_key', 'bot_type', 'requires_approval', 'is_active', 'config_json', 'erp_active_users'];

        // Checkboxes only default to 0 on full company-form saves (when 'name' is present).
        // Partial saves (e.g. bot-config saving only config_json) must NOT touch is_active.
        if (array_key_exists('name', $data)) {
            foreach (['requires_approval', 'is_active'] as $cb) {
                if (!array_key_exists($cb, $data)) {
                    $data[$cb] = 0;
                }
            }
        }

        // Integer fields: cast so empty string '' doesn't fail the INT column
        foreach (['requires_approval', 'is_active', 'erp_active_users'] as $f) {
            if (array_key_exists($f, $data)) {
                $data[$f] = (int)$data[$f];
            }
        }

        $params = [];
        $sets   = [];
        foreach ($fields as $f) {
            if (array_key_exists($f, $data)) {
                $sets[]   = "{$f} = ?";
                $params[] = is_array($data[$f]) || is_object($data[$f]) ? json_encode($data[$f]) : $data[$f];
            }
        }

        try {
            if ($id > 0) {
                $params[] = $id;
                $db->prepare("UPDATE companies SET " . implode(', ', $sets) . " WHERE id = ?")
                   ->execute($params);
                return $id;
            }

            // INSERT — require name
            if (trim($data['name'] ?? '') === '') {
                throw new \RuntimeException('El nombre de la empresa es requerido.');
            }
            $insertData = [];
            foreach ($fields as $f) {
                if (array_key_exists($f, $data)) {
                    $insertData[$f] = $data[$f];
                }
            }
            $cols = implode(', ', array_keys($insertData));
            $vals = implode(', ', array_fill(0, count($insertData), '?'));
            $db->prepare("INSERT INTO companies ({$cols}) VALUES ({$vals})")
               ->execute(array_values($insertData));
            return (int)$db->lastInsertId();

        } catch (\PDOException $e) {
            $msg = $e->getMessage();
            // Duplicate entry on name unique key
            if (str_contains($msg, '1062') || str_contains($msg, 'Duplicate entry')) {
                throw new \RuntimeException('Ya existe una empresa con ese nombre.');
            }
            throw new \RuntimeException('Error al guardar: ' . $msg);
        }
    }

    public static function delete(int $id): bool
    {
        $stmt = db()->prepare("DELETE FROM companies WHERE id = ?");
        $stmt->execute([$id]);
        return $stmt->rowCount() > 0;
    }
}