<?php

namespace App\Database\Migrations;

use CodeIgniter\Database\Migration;

class CreateJobPostings extends Migration
{
    public function up()
    {
        if (!$this->db->tableExists('job_templates')) {
            $this->forge->addField([
                'template_id' => ['type' => 'VARCHAR', 'constraint' => 36],
                'title' => ['type' => 'VARCHAR', 'constraint' => 255],
                'description' => ['type' => 'TEXT', 'null' => true],
                'department' => ['type' => 'VARCHAR', 'constraint' => 255, 'null' => true],
                'location' => ['type' => 'VARCHAR', 'constraint' => 255, 'null' => true],
                'employment_type' => ['type' => 'VARCHAR', 'constraint' => 50, 'null' => true],
                'responsibilities' => ['type' => 'TEXT', 'null' => true],
                'requirements' => ['type' => 'TEXT', 'null' => true],
                'version' => ['type' => 'INT', 'constraint' => 11, 'default' => 1],
                'is_active' => ['type' => 'TINYINT', 'constraint' => 1, 'default' => 1],
                'created_by' => ['type' => 'INT', 'constraint' => 11, 'unsigned' => true, 'null' => true],
                'created_at' => ['type' => 'DATETIME', 'null' => true],
                'updated_at' => ['type' => 'DATETIME', 'null' => true],
            ]);
            $this->forge->addKey('template_id', true);
            $this->forge->addKey('is_active', false, false, 'idx_job_templates_active');
            $this->forge->createTable('job_templates', true);
        }

        if (!$this->db->tableExists('job_template_versions')) {
            $this->forge->addField([
                'version_id' => ['type' => 'VARCHAR', 'constraint' => 36],
                'template_id' => ['type' => 'VARCHAR', 'constraint' => 36],
                'version' => ['type' => 'INT', 'constraint' => 11],
                'title' => ['type' => 'VARCHAR', 'constraint' => 255],
                'description' => ['type' => 'TEXT', 'null' => true],
                'department' => ['type' => 'VARCHAR', 'constraint' => 255, 'null' => true],
                'location' => ['type' => 'VARCHAR', 'constraint' => 255, 'null' => true],
                'employment_type' => ['type' => 'VARCHAR', 'constraint' => 50, 'null' => true],
                'responsibilities' => ['type' => 'TEXT', 'null' => true],
                'requirements' => ['type' => 'TEXT', 'null' => true],
                'saved_by' => ['type' => 'INT', 'constraint' => 11, 'unsigned' => true, 'null' => true],
                'saved_at' => ['type' => 'DATETIME', 'null' => true],
            ]);
            $this->forge->addKey('version_id', true);
            $this->forge->addKey('template_id', false, false, 'idx_template_versions_template_id');
            $this->forge->createTable('job_template_versions', true);
        }

        if (!$this->db->tableExists('job_positions')) {
            $this->forge->addField([
                'position_id' => ['type' => 'VARCHAR', 'constraint' => 36],
                'template_id' => ['type' => 'VARCHAR', 'constraint' => 36, 'null' => true],
                'title' => ['type' => 'VARCHAR', 'constraint' => 255],
                'description' => ['type' => 'TEXT', 'null' => true],
                'department' => ['type' => 'VARCHAR', 'constraint' => 255, 'null' => true],
                'location' => ['type' => 'VARCHAR', 'constraint' => 255, 'null' => true],
                'employment_type' => ['type' => 'VARCHAR', 'constraint' => 50, 'null' => true],
                'responsibilities' => ['type' => 'TEXT', 'null' => true],
                'requirements' => ['type' => 'TEXT', 'null' => true],
                'status' => ['type' => 'VARCHAR', 'constraint' => 20, 'default' => 'draft'],
                'posted_by' => ['type' => 'INT', 'constraint' => 11, 'unsigned' => true, 'null' => true],
                'posted_at' => ['type' => 'DATETIME', 'null' => true],
                'details_click_count' => ['type' => 'INT', 'constraint' => 11, 'unsigned' => true, 'default' => 0],
                'created_at' => ['type' => 'DATETIME', 'null' => true],
                'updated_at' => ['type' => 'DATETIME', 'null' => true],
            ]);
            $this->forge->addKey('position_id', true);
            $this->forge->addKey('status', false, false, 'idx_job_positions_status');
            $this->forge->createTable('job_positions', true);
        }

        if (!$this->db->tableExists('applications')) {
            $this->forge->addField([
                'application_id' => ['type' => 'VARCHAR', 'constraint' => 36],
                'position_id' => ['type' => 'VARCHAR', 'constraint' => 36],
                'first_name' => ['type' => 'VARCHAR', 'constraint' => 100],
                'last_name' => ['type' => 'VARCHAR', 'constraint' => 100],
                'email' => ['type' => 'VARCHAR', 'constraint' => 255],
                'phone' => ['type' => 'VARCHAR', 'constraint' => 30],
                'resume_file_url' => ['type' => 'TEXT'],
                'status' => ['type' => 'VARCHAR', 'constraint' => 20, 'default' => 'new'],
                'admin_notes' => ['type' => 'TEXT', 'null' => true],
                'submitted_at' => ['type' => 'DATETIME', 'null' => true],
            ]);
            $this->forge->addKey('application_id', true);
            $this->forge->addKey('position_id', false, false, 'idx_applications_position_id');
            $this->forge->addKey('status', false, false, 'idx_applications_status');
            $this->forge->addKey('email', false, false, 'idx_applications_email');
            $this->forge->createTable('applications', true);
        }
    }

    public function down()
    {
        $this->forge->dropTable('applications', true);
        $this->forge->dropTable('job_positions', true);
        $this->forge->dropTable('job_template_versions', true);
        $this->forge->dropTable('job_templates', true);
    }
}