<?php

namespace cx_newsletter;

class manage_customers_activity
extends activity {
    public function show_after_button() : null {
        return null;
    }

    public function inside_buttons() : array {
        return [ 'add', 'save', 'remove', 'search' ];
    }
    
    public function inside_inputs() : array {
        return [
            'company' => 'string',
            'name' => 'string',
            'surname' => 'string',
            'comments' => 'string ',
            'email' => 'email',
            'phone_number' => 'phone',
            'tester' => 'bool',
            'limit' => 'int',
            'filter' => 'string',
            'id' => 'int',
            'group' => 'custom',
        ];
    }

    public function get_site_template_name() : string {
        return 'manage_customers';
    }

    private function get_all_groups() : array {

    }

    private function get_limit() : int {
        if ($this->is_validated('limit')) {
            $this->set('limit', $this->get_validated('limit'));
            return $this->get_validated('limit');
        }

        $this->warning_toast('Limit is not correct, it must be number.');
        return 50;
    }

    private function get_filter() : string {
        if ($this->is_validated('filter')) {
            $this->set('filter', $this->get_validated('filter'));
            return $this->get_validated('filter');
        }

        $this->warning_toast('Filter value is not correct.');
        return '';
    }

    private function prepare_groups(?group $target = null) : string {
        $render = new \cx_appengine\string_builder();

        if ($target !== null) {
            $target = $target->get_id();
        }

        foreach ($this->groups as $group) {
            $options = [];
            
            if ($group->has_id()) {
                $options['group_id'] = $group->get_id();
            } else {
                $options['group_id'] = 'NULL';
            }

            $selected = false;
            $group_id = null;

            if ($group->has_id()) {
                $group_id = $group->get_id();
            }

            if ($target === $group_id) {
                $selected = true;
            }

            if ($selected) {
                $options['selected'] = 'selected';
            }

            $options['group_name'] = $group->name;

            $render->push(
                $this
                ->get_templates()
                ->prepare('single_group_option')
                ->render($options)
            );
        }

        return $render->get();
    }

    private function load_customers() : \cx_appengine\string_builder {
        $limit = 50;
        $filter = '';
        $list = new \cx_appengine\string_builder();

        if ($this->is_received('search')) {
            $limit = $this->get_limit();
            $filter = $this->get_filter();
        }
        
        try {
            $customers = $this->mapper->find($filter, $limit);
            $converter = new customers_converter();

            foreach ($customers as $customer) {
                $options = $converter->load_object($customer)->get_array();
                
                if ($customer->tester) {
                    $options['tester'] = 'checked';
                }

                $options['groups'] = $this->prepare_groups($customer->group);

                $list->push(
                    $this
                    ->get_templates()
                    ->prepare('single_customer')
                    ->render($options)
                );
            }
        } catch (\exception $exception) {
            $this->error_toast('Can not list. '.$exception->getMessage());
        } finally {
            return $list;
        }
    }

    public function preprocess() : void {
        $this->mapper = new customers_mapper(
            $this->get_database(), 
            $this->get_tables()
        );

        $this->groups_mapper = new groups_mapper(
            $this->get_database(),
            $this->get_tables()
        );

        $this->groups = $this->groups_mapper->load_all();

        $nogroup = new group();
        $nogroup->name = 'nogroup';

        array_push($this->groups, $nogroup);
    }

    private function check_validation(array $list) : bool {
        foreach ($list as $item) {
            if (!$this->is_validated($item)) {
                $this->error_toast(
                    $item.__(' is not correct.', 'cx_newsletter')
                );
                return false;
            }
        }

        return true;
    }

    private function get_customer_from_inputs() : ?customer {
        $id = null;

        if ($this->is_validated('id')) {
            $id = $this->get_validated('id');
        }

        $list = [
            'name',
            'surname',
            'comments',
            'company',
        ];

        if (!$this->check_validation($list)) {
            return null;
        }

        $customer = new customer($id);
        $customer->name = $this->get_validated('name');
        $customer->surname = $this->get_validated('surname');
        $customer->company = $this->get_validated('company');
        $customer->comments = $this->get_validated('comments');
        $customer->email = $this->get_received('email', '');
        $customer->phone_number = $this->get_received('phone_number', '');
        $customer->tester = $this->is_received('tester');

        $group = $this->get_received('group');

        if ($group === 'NULL') {
            $customer->group = null;
        } else {
            $customer->group = new group(intval($group));
        }

        $validator = new customer_validator(
            $this->get_database(), 
            $this->get_tables()
        );

        $validator
        ->load($customer)
        ->check();

        if (!$validator->is_valid()) {
            $this->error_toast($validator->error_on());
            return null;
        }

        return $customer;
    }

    public function add_customer() : void {
        $customer = $this->get_customer_from_inputs();   

        if ($customer === null) {
            return;
        }   

        try {
            $this->mapper->create($customer);
            $this->success_toast('Add customer success.');
        } catch (\exception $exception) {
            $this->error_toast($exception->getMessage());
        }
    }

    public function save_customer() : void {
        $customer = $this->get_customer_from_inputs();
        
        if ($customer === null) {
            return;
        }

        try {
            $this->mapper->save($customer);
            $this->success_toast('Save customer success.');
        } catch (\exception $exception) {
            $this->error_toast($exception->getMessage());
        }
    }

    public function remove_customer() : void {
        $customer = $this->get_customer_from_inputs();
        
        if ($customer === null) {
            return;
        }

        try {
            $this->mapper->remove($customer);
            $this->success_toast('Remove customer success.');
        } catch (\exception $exception) {
            $this->error_toast($exception->getMessage());
        }
    }

    public function process() : self {
        $this->preprocess();

        if ($this->is_received('add')) {
            $this->add_customer();
        }

        if ($this->is_received('save')) {
            $this->save_customer();
        }

        if ($this->is_received('remove')) {
            $this->remove_customer();
        }       
       
        $this->set('groups', $this->prepare_groups());
        $this->set('all_customers', $this->load_customers());
        $this->set(
            'export', 
            \get_home_url().'/cx-newsletter/customers-export'
        );

        return $this;
    }

    private array $groups;
    private groups_mapper $groups_mapper;
    private customers_mapper $mapper;
}