<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class Migration_Create_accounting_foundation extends CI_Migration
{
    public function up()
    {
        if (!$this->db->table_exists('document_sequences')) {
            $this->dbforge->add_field(array(
                'id' => array('type' => 'BIGINT', 'unsigned' => true, 'auto_increment' => true),
                'document_type' => array('type' => 'VARCHAR', 'constraint' => 50),
                'period_key' => array('type' => 'VARCHAR', 'constraint' => 20),
                'prefix' => array('type' => 'VARCHAR', 'constraint' => 50),
                'current_value' => array('type' => 'BIGINT', 'unsigned' => true, 'default' => 0),
                'updated_at' => array('type' => 'DATETIME', 'null' => true)
            ));
            $this->dbforge->add_key('id', true);
            $this->dbforge->create_table('document_sequences', true, array('ENGINE' => 'InnoDB'));
            $this->db->query('ALTER TABLE document_sequences ADD UNIQUE KEY uq_document_sequence (document_type, period_key)');
        }

        if (!$this->db->table_exists('system_account_mappings')) {
            $this->dbforge->add_field(array(
                'id' => array('type' => 'BIGINT', 'unsigned' => true, 'auto_increment' => true),
                'mapping_key' => array('type' => 'VARCHAR', 'constraint' => 100),
                'account_id' => array('type' => 'BIGINT', 'unsigned' => true),
                'description' => array('type' => 'VARCHAR', 'constraint' => 255, 'null' => true),
                'is_active' => array('type' => 'TINYINT', 'constraint' => 1, 'default' => 1),
                'created_at' => array('type' => 'DATETIME', 'null' => true),
                'updated_at' => array('type' => 'DATETIME', 'null' => true)
            ));
            $this->dbforge->add_key('id', true);
            $this->dbforge->add_key('account_id');
            $this->dbforge->create_table('system_account_mappings', true, array('ENGINE' => 'InnoDB'));
            $this->db->query('ALTER TABLE system_account_mappings ADD UNIQUE KEY uq_system_account_mapping (mapping_key)');
        }

        $mappings = array(
            array('inventory', 21, 'Persediaan'),
            array('cost_of_goods_sold', 63, 'Harga pokok penjualan'),
            array('accounts_receivable', 19, 'Piutang usaha'),
            array('deferred_revenue', 78, 'Pendapatan diterima di muka'),
            array('inventory_in_sales', 80, 'Persediaan dalam penjualan'),
            array('goods_revenue', 62, 'Pendapatan barang'),
            array('customer_savings', 70, 'Tabungan pelanggan'),
            array('depreciation_expense', 54, 'Beban penyusutan aset')
        );

        foreach ($mappings as $mapping) {
            $accountExists = $this->db->where('id', $mapping[1])->count_all_results('accounts') > 0;
            $mappingExists = $this->db->where('mapping_key', $mapping[0])->count_all_results('system_account_mappings') > 0;
            if ($accountExists && !$mappingExists) {
                $this->db->insert('system_account_mappings', array(
                    'mapping_key' => $mapping[0],
                    'account_id' => $mapping[1],
                    'description' => $mapping[2],
                    'is_active' => 1,
                    'created_at' => date('Y-m-d H:i:s')
                ));
            }
        }
    }

    public function down()
    {
        $this->dbforge->drop_table('system_account_mappings', true);
        $this->dbforge->drop_table('document_sequences', true);
    }
}