<?php

namespace App\Models;

use CodeIgniter\Model;

abstract class CommonModel extends Model
{
    protected $table            = '';
    protected $primaryKey       = '';
    protected $useAutoIncrement = true;
    protected $returnType       = 'array';

    protected $useSoftDeletes   = false;
    protected $protectFields    = true;
    protected $allowedFields    = [];

    protected bool $allowEmptyInserts = false;
    protected bool $updateOnlyChanged = true;

    protected array $casts = [];
    protected array $castHandlers = [];

    // Dates
    protected $useTimestamps = false;
    protected $dateFormat    = 'datetime';
    protected $createdField  = 'created_at';
    protected $updatedField  = 'updated_at';
    protected $deletedField  = 'deleted_at';

    // Validation
    protected $validationRules      = [];
    protected $validationMessages   = [];
    protected $skipValidation       = false;
    protected $cleanValidationRules = true;

    // Callbacks
    protected $allowCallbacks = true;
    protected $beforeInsert   = [];
    protected $afterInsert    = [];
    protected $beforeUpdate   = [];
    protected $afterUpdate    = [];
    protected $beforeFind     = [];
    protected $afterFind      = [];
    protected $beforeDelete   = [];
    protected $afterDelete    = [];

    protected function __construct(array $fields)
    {
        parent::__construct();
        $this->setFields($fields);
        $this->setRules($this->getFields());
    }
    abstract public function getTitleField(): string;

    public function getPKField(): string
    {
        return $this->primaryKey;
    }
    final public function getFields(array $options = []): array //options=>except or only
    {
        if (isset($options['except'])) {
            return array_diff_key($this->allowedFields, array_flip($options['except']));
        } elseif (isset($options['only'])) {
            return array_intersect_key($this->allowedFields, array_flip($options['only']));
        }
        return $this->allowedFields;
    }
    final public function setFields(array $fields): void
    {
        $this->allowedFields = $fields;
    }
    final public function getRules(array $options): array //options=>except or only
    {
        return $this->getValidationRules($options);
    }
    final public function setRules(array $fields, $rules = []): void
    {
        foreach ($fields as $field) {
            $rules = $this->getFieldRule($field, $rules);
        }
        $this->setValidationRules($rules);
    }

    protected function getFieldRule(string $field, array $rules): array
    {
        switch ($field) {
            case $this->getPKField():
                //수동입력인경우
                if (!$this->useAutoIncrement) {
                    $rules[$field] = "required|regex_match[/^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}/]|is_unique[{$this->table}.{$field}]";
                } else {
                    $rules[$field] = "required|numeric";
                };
                break;
            case $this->getTitleField():
                $rules[$field] =  "required|trim|string";
                break;
            case "passwd":
                $rules[$field] = "required|trim|string";
                break;
            case "confirmpassword":
                $rules["confirmpassword"] = "required|trim|string|matches[passwd]";
                break;
            case "email":
                $rules[$field] =  "if_exist|trim|valid_email";
                break;
            case 'image':
                $rules[$field] =  "is_image[{$field}]|mime_in[{$field},image/jpg,image/jpeg,image/gif,image/png,image/webp]|max_size[{$field},300]|max_dims[{$field},2048,768]";
                break;
            case "updated_at":
            case "created_at":
            case "deleted_at":
                $rules[$field] = "if_exist|valid_date";
                break;
            default:
                $rules[$field] = "if_exist|string";
                break;
        }
        return $rules;
    }

    final public function getEntity(): array|object|null
    {
        return $this->asObject($this->returnType)->first();
    }
    final public function getEntitys(): array
    {
        return $this->asObject($this->returnType)->findAll();
    }

    //create , modify 직전 작업용 작업
    protected function setEntityData($entity, string $field, $value = null): mixed
    {
        switch ($field) {
            case $this->getPKField():
                if ($value === null) {
                    $randomBytes = bin2hex(random_bytes(32));
                    $entity->$field = sprintf(
                        '%08s-%04s-%04x-%04x-%12s',
                        substr($randomBytes, 0, 8),
                        substr($randomBytes, 8, 4),
                        substr($randomBytes, 12, 4),
                        substr($randomBytes, 16, 4),
                        substr($randomBytes, 20, 12)
                    );
                } else {
                    $entity->$field = $value;
                }
                break;
            case "passwd":
                $entity->$field = password_hash($value, PASSWORD_DEFAULT);
                break;
            case "content":
                $entity->$field = htmlspecialchars($value, ENT_QUOTES); //htmlentities($value);
                break;
            default:
                $entity->$field = $value;
                break;
        }
        return $entity;
    }

    private function save_process($entity): mixed
    {
        if ($entity->hasChanged()) {
            if (!$this->save($entity)) {
                log_message("error", __FUNCTION__ . "에서 호출:" . $this->getLastQuery());
                log_message("error", implode("\n", $this->errors()));
                throw new \Exception(__FUNCTION__ . " 오류 발생.\n" . $this->getLastQuery() . "\n" . var_dump($this->errors(), true));
            }
        } else {
            throw new \Exception(__FUNCTION__ . " 오류 발생.\n 기존정보와 동일하여 수정되지 않았습니다.");
        }
        return $entity;
    }
    final protected function create_process($entity, array $formDatas = []): mixed
    {
        foreach ($this->getFields() as $field) {
            if (array_key_exists($field, $formDatas) && $formDatas[$field] !== $entity->$field) {
                $entity = $this->setEntityData($entity, $field, $formDatas[$field]);
            }
        }
        //primaryKey가 수동입력이면
        $pkField = $this->getPKField();
        if (!$this->useAutoIncrement && $entity->$pkField === null) {
            //PrimayKey Field를 allowedFields의 맨앞에 넣기 -> array_unshif
            array_unshift($this->allowedFields, $this->getPKField());
            $entity = $this->setEntityData($entity, $this->getPKField());
        }
        $entity = $this->save_process($entity);
        //primaryKey가 자동입력이면
        if ($this->useAutoIncrement) {
            $entity = $this->setEntityData($entity, $this->getPKField(), $this->getInsertID());
        }
        return $entity;
    }
    final protected function modify_process($entity, array $formDatas = []): mixed
    {
        foreach ($this->getFields() as $field) {
            if (array_key_exists($field, $formDatas) && $formDatas[$field] !== $entity->$field) {
                $entity = $this->setEntityData($entity, $field, $formDatas[$field]);
            }
        }
        return $this->save_process($entity);
    }
}