<?php

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

return new class extends Migration
{
    public function up(): void
    {
        Schema::create('course_checkin_days', function (Blueprint $table) {
            $table->id();
            $table->foreignId('course_id')->constrained('courses')->cascadeOnDelete();
            $table->date('teach_date')->comment('开课日（按 teach_start~end 逐日生成）');
            $table->string('signin_code', 64)->comment('当日签到码，扫码/补签关联此日');
            $table->timestamps();
            $table->unique(['course_id', 'teach_date'], 'crs_chk_day_course_date_uq');
            $table->unique('signin_code', 'crs_chk_day_code_uq');
        });

        Schema::create('course_signup_checkins', function (Blueprint $table) {
            $table->id();
            $table->foreignId('course_signup_id')->constrained('course_signups')->cascadeOnDelete();
            $table->date('checkin_date');
            $table->dateTime('checked_in_at')->nullable();
            $table->timestamps();
            $table->unique(['course_signup_id', 'checkin_date'], 'crs_signup_chk_date_uq');
            $table->index(['checkin_date', 'checked_in_at'], 'crs_signup_chk_at_idx');
        });
    }

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