<?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('courses', function (Blueprint $table) {
            $table->id();
            $table->string('code', 64)->nullable()->unique()->comment('业务编码，签到等场景');
            $table->string('code_prefix', 32)->nullable()->comment('课程前缀，如 AI26，对齐原型');
            $table->string('title', 255);
            $table->foreignId('course_system_dict_item_id')
                ->nullable()
                ->constrained('dict_items')
                ->restrictOnDelete()
                ->comment('课程体系，字典编码 course_system，存 dict_items.id');
            $table->foreignId('course_type_dict_item_id')
                ->nullable()
                ->constrained('dict_items')
                ->restrictOnDelete()
                ->comment('课程类型，字典编码 course_type，存 dict_items.id');
            $table->date('teach_start_date')->nullable();
            $table->date('teach_end_date')->nullable();
            $table->date('signup_start_date')->nullable();
            $table->date('signup_end_date')->nullable();
            $table->foreignId('auto_add_teacher_dict_item_id')
                ->nullable()
                ->constrained('dict_items')
                ->restrictOnDelete()
                ->comment('已审核学员自动入老师库，字典 yes_no，存 dict_items.id');
            $table->unsignedInteger('capacity')->default(0)->comment('开课人数');
            $table->string('cover_url', 512)->nullable()->comment('课程封面');
            $table->string('promo_url', 512)->nullable()->comment('课程宣传页');
            $table->string('news_link_url', 512)->nullable()->comment('资讯链接');
            $table->longText('intro_html')->nullable()->comment('课程简介（富文本 HTML）');
            $table->json('signup_form_schema')->nullable()->comment('报名表单设计器 JSON，对齐 prototype step2');
            $table->tinyInteger('progress_status')->default(1)->comment('1未开始 2进行中 3已结束');
            $table->tinyInteger('published')->default(0)->comment('1已发布/上架 0未发布');
            $table->text('remark')->nullable();
            $table->integer('sort')->default(0);
            $table->timestamps();
            $table->softDeletes();
            $table->index(['course_system_dict_item_id', 'progress_status', 'published'], 'crs_sys_prog_pub_idx');
            $table->index(['course_type_dict_item_id'], 'crs_type_item_idx');
        });

        Schema::create('course_sessions', function (Blueprint $table) {
            $table->id();
            $table->foreignId('course_id')->constrained('courses')->cascadeOnDelete();
            $table->string('title', 255)->nullable();
            $table->dateTime('starts_at')->nullable();
            $table->dateTime('ends_at')->nullable();
            $table->string('venue', 255)->nullable();
            $table->unsignedInteger('capacity')->nullable();
            $table->integer('sort')->default(0);
            $table->timestamps();
            $table->softDeletes();
            $table->index(['course_id', 'sort']);
        });

        Schema::create('course_signups', function (Blueprint $table) {
            $table->id();
            $table->foreignId('course_id')->constrained('courses')->cascadeOnDelete();
            $table->foreignId('course_session_id')->nullable()->constrained('course_sessions')->nullOnDelete();
            $table->string('name', 64);
            $table->string('mobile', 32);
            $table->string('company', 128)->nullable();
            $table->dateTime('signed_up_at')->nullable();
            $table->dateTime('checked_in_at')->nullable();
            $table->tinyInteger('status')->default(1)->comment('1正常 0取消等');
            $table->timestamps();
            $table->softDeletes();
            $table->index(['course_id', 'signed_up_at']);
        });

        Schema::create('activities', function (Blueprint $table) {
            $table->id();
            $table->string('code', 64)->nullable()->unique();
            $table->string('title', 255);
            $table->string('activity_type', 32)->nullable()->comment('沙龙/讲座/论坛');
            $table->unsignedInteger('quota')->default(0)->comment('名额');
            $table->date('event_start_date')->nullable();
            $table->date('event_end_date')->nullable();
            $table->date('signup_start_date')->nullable();
            $table->date('signup_end_date')->nullable();
            $table->string('location', 255)->nullable();
            $table->tinyInteger('progress_status')->default(1);
            $table->tinyInteger('published')->default(0);
            $table->text('remark')->nullable();
            $table->integer('sort')->default(0);
            $table->timestamps();
            $table->softDeletes();
            $table->index(['activity_type', 'progress_status', 'published']);
        });

        Schema::create('activity_sessions', function (Blueprint $table) {
            $table->id();
            $table->foreignId('activity_id')->constrained('activities')->cascadeOnDelete();
            $table->string('title', 255)->nullable();
            $table->dateTime('starts_at')->nullable();
            $table->dateTime('ends_at')->nullable();
            $table->string('venue', 255)->nullable();
            $table->unsignedInteger('capacity')->nullable();
            $table->integer('sort')->default(0);
            $table->timestamps();
            $table->softDeletes();
            $table->index(['activity_id', 'sort']);
        });

        Schema::create('activity_signups', function (Blueprint $table) {
            $table->id();
            $table->foreignId('activity_id')->constrained('activities')->cascadeOnDelete();
            $table->foreignId('activity_session_id')->nullable()->constrained('activity_sessions')->nullOnDelete();
            $table->string('name', 64);
            $table->string('mobile', 32);
            $table->string('company', 128)->nullable();
            $table->dateTime('signed_up_at')->nullable();
            $table->dateTime('checked_in_at')->nullable();
            $table->tinyInteger('status')->default(1);
            $table->timestamps();
            $table->softDeletes();
            $table->index(['activity_id', 'signed_up_at']);
        });

        Schema::create('news', function (Blueprint $table) {
            $table->id();
            $table->string('title', 255);
            $table->string('category', 64)->nullable();
            $table->string('source', 128)->nullable();
            $table->string('cover_url', 512)->nullable();
            $table->text('summary')->nullable();
            $table->longText('content_html')->nullable();
            $table->tinyInteger('status')->default(0)->comment('0草稿 1已发布');
            $table->dateTime('published_at')->nullable();
            $table->timestamps();
            $table->softDeletes();
            $table->index(['category', 'status', 'published_at']);
        });
    }

    public function down(): void
    {
        Schema::dropIfExists('activity_signups');
        Schema::dropIfExists('activity_sessions');
        Schema::dropIfExists('activities');
        Schema::dropIfExists('course_signups');
        Schema::dropIfExists('course_sessions');
        Schema::dropIfExists('courses');
        Schema::dropIfExists('news');
    }
};