<?php

declare(strict_types=1);

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

/**
 * The inbox: everything the public site sends back.
 *
 * Until now the public API was read-only, so a call for contributors ended at
 * "here is what we need" with nowhere for the reader to answer. This is the
 * other half of the conversion point.
 *
 * Two kinds share one table because the handling is identical — somebody wrote
 * in, somebody has to reply — and only the intent differs: offering time, or
 * asking for it.
 */
return new class extends Migration
{
    public function up(): void
    {
        Schema::create('applications', function (Blueprint $table) {
            $table->id();

            // Null for a general enquiry, and null again if the call is later
            // deleted: a person who wrote in must not disappear because the
            // opening they answered was tidied up.
            $table->foreignId('call_id')->nullable()
                ->constrained()->nullOnDelete();

            // Snapshot of what they answered, so the record still reads
            // correctly once the call is gone or its title is rewritten.
            $table->string('call_title')->nullable();

            $table->string('kind', 20)->default('contribute');
            $table->string('status', 20)->default('new');

            $table->string('name');
            $table->string('email');
            $table->string('organisation')->nullable();
            $table->text('message');

            // Mirrors the call's own ask, so the two numbers can be compared
            // at a glance instead of hunting through the message.
            $table->unsignedTinyInteger('hours_per_week')->nullable();
            $table->jsonb('links')->nullable();

            // The language they wrote in — reply in the same one.
            $table->string('locale', 5)->default('es');

            // Hashed, never raw: enough to recognise a flood coming from one
            // source, without this table becoming a log of visitors' IPs.
            $table->string('ip_hash', 64)->nullable();

            // Internal side, invisible to the sender.
            $table->text('notes')->nullable();
            $table->foreignId('handled_by')->nullable()
                ->constrained('users')->nullOnDelete();
            $table->timestamp('handled_at')->nullable();

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

            // The inbox is read newest-unhandled-first, and deduplication
            // looks up by email.
            $table->index(['status', 'created_at']);
            $table->index('email');
        });
    }

    public function down(): void
    {
        Schema::dropIfExists('applications');
    }
};