<?php

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

return new class extends Migration
{
    /**
     * Run the migrations.
     */
    public function up(): void
    {
        Schema::create('issues', function (Blueprint $table) {
            $table->id();
            $table->string('issue_number')->unique()->comment('Auto-generated issue number (e.g., ISS-2025-001)');
            $table->string('title');
            $table->text('description')->nullable();

            // Issue categorization
            $table->enum('issue_type', ['work_item', 'project_task', 'maintenance', 'member_request'])
                  ->default('work_item')
                  ->comment('Type of issue');
            $table->enum('status', ['new', 'assigned', 'in_progress', 'review', 'closed'])
                  ->default('new')
                  ->comment('Current workflow status');
            $table->enum('priority', ['low', 'medium', 'high', 'urgent'])
                  ->default('medium')
                  ->comment('Priority level');

            // User relationships
            $table->foreignId('created_by_user_id')->constrained('users')->cascadeOnDelete()->comment('User who created the issue');
            $table->foreignId('assigned_to_user_id')->nullable()->constrained('users')->nullOnDelete()->comment('User assigned to work on this');
            $table->foreignId('reviewer_id')->nullable()->constrained('users')->nullOnDelete()->comment('User assigned to review');

            // Related entities
            $table->foreignId('member_id')->nullable()->constrained('members')->nullOnDelete()->comment('Related member (for member requests)');
            $table->foreignId('parent_issue_id')->nullable()->constrained('issues')->nullOnDelete()->comment('Parent issue for sub-tasks');

            // Dates and time tracking
            $table->date('due_date')->nullable()->comment('Deadline for completion');
            $table->timestamp('closed_at')->nullable()->comment('When issue was closed');
            $table->decimal('estimated_hours', 8, 2)->nullable()->comment('Estimated time to complete');
            $table->decimal('actual_hours', 8, 2)->default(0)->comment('Actual time spent (sum of time logs)');

            $table->timestamps();
            $table->softDeletes();

            // Indexes for common queries
            $table->index('issue_type');
            $table->index('status');
            $table->index('priority');
            $table->index('assigned_to_user_id');
            $table->index('created_by_user_id');
            $table->index('due_date');
        });
    }

    /**
     * Reverse the migrations.
     */
    public function down(): void
    {
        Schema::dropIfExists('issues');
    }
};