<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

class CreatePdfmTables extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        // PDFM Spools Table
        Schema::create('pdfm_spools', function (Blueprint $table) {
            $table->id();
            $table->string('spool_no')->unique();
            $table->string('pdf_file')->nullable();
            $table->text('description')->nullable();
            $table->timestamps();
        });

        // PDFM Elements Table
        Schema::create('pdfm_elements', function (Blueprint $table) {
            $table->id();
            $table->string('element_code')->unique();
            $table->string('spool_no')->nullable();
            $table->string('element_type')->nullable();
            $table->text('description')->nullable();
            $table->timestamps();
            
            $table->index('spool_no');
        });

        // PDFM Joints Table
        Schema::create('pdfm_joints', function (Blueprint $table) {
            $table->id();
            $table->string('joint_no')->unique();
            $table->string('spool_no')->nullable();
            $table->string('element_from')->nullable();
            $table->string('element_to')->nullable();
            $table->string('joint_type')->nullable();
            $table->text('description')->nullable();
            $table->timestamps();
            
            $table->index('spool_no');
        });

        // PDFM Welders Table
        Schema::create('pdfm_welders', function (Blueprint $table) {
            $table->id();
            $table->string('welder_name');
            $table->string('welder_code')->unique();
            $table->string('qualification')->nullable();
            $table->date('qualification_date')->nullable();
            $table->date('expiry_date')->nullable();
            $table->text('notes')->nullable();
            $table->timestamps();
        });

        // PDFM Welder Assignments Table (many-to-many relationship)
        Schema::create('pdfm_welder_assignments', function (Blueprint $table) {
            $table->id();
            $table->string('joint_no');
            $table->unsignedBigInteger('welder_id');
            $table->date('assignment_date')->nullable();
            $table->timestamps();
            
            $table->foreign('welder_id')->references('id')->on('pdfm_welders')->onDelete('cascade');
            $table->index('joint_no');
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('pdfm_welder_assignments');
        Schema::dropIfExists('pdfm_welders');
        Schema::dropIfExists('pdfm_joints');
        Schema::dropIfExists('pdfm_elements');
        Schema::dropIfExists('pdfm_spools');
    }
}