<?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('universities', function (Blueprint $table) {
            $table->id();
            $table->string('name', 255);
            $table->string('province', 64)->nullable();
            $table->string('city', 64)->nullable();
            $table->decimal('latitude', 10, 7)->nullable();
            $table->decimal('longitude', 10, 7)->nullable();
            $table->string('address', 512)->nullable();
            $table->text('remark')->nullable();
            $table->tinyInteger('status')->default(1)->comment('1启用 0停用');
            $table->timestamps();
            $table->softDeletes();
            $table->index(['city', 'status']);
        });

        Schema::create('teachers', function (Blueprint $table) {
            $table->id();
            $table->string('name', 64);
            $table->foreignId('university_id')
                ->nullable()
                ->constrained('universities')
                ->nullOnDelete();
            $table->string('city', 64)->nullable();
            $table->string('title', 64)->nullable()->comment('职称');
            $table->string('research_direction', 255)->nullable()->comment('研究方向');
            $table->string('phone', 32)->nullable();
            $table->string('email', 128)->nullable();
            $table->foreignId('source_dict_item_id')
                ->nullable()
                ->constrained('dict_items')
                ->restrictOnDelete()
                ->comment('来源，字典 teacher_source');
            $table->foreignId('star_level_dict_item_id')
                ->nullable()
                ->constrained('dict_items')
                ->restrictOnDelete()
                ->comment('星级，字典 teacher_level');
            $table->foreignId('status_dict_item_id')
                ->nullable()
                ->constrained('dict_items')
                ->restrictOnDelete()
                ->comment('跟进状态，字典 teacher_status');
            $table->date('next_follow_date')->nullable()->comment('下次跟进日');
            $table->string('next_follow_subject', 255)->nullable();
            $table->boolean('is_partner')->default(false)->comment('是否转化伙伴');
            $table->timestamp('converted_at')->nullable();
            $table->text('remark')->nullable();
            $table->integer('sort')->default(0);
            $table->timestamps();
            $table->softDeletes();
            $table->index(['university_id', 'status_dict_item_id']);
            $table->index(['next_follow_date', 'star_level_dict_item_id']);
            $table->index(['source_dict_item_id']);
        });

        Schema::create('teacher_follow_records', function (Blueprint $table) {
            $table->id();
            $table->foreignId('teacher_id')->constrained('teachers')->cascadeOnDelete();
            $table->foreignId('admin_user_id')
                ->nullable()
                ->constrained('admin_users')
                ->nullOnDelete();
            $table->string('subject', 255)->comment('跟进主题');
            $table->text('content')->nullable()->comment('跟进记录');
            $table->foreignId('follow_method_dict_item_id')
                ->nullable()
                ->constrained('dict_items')
                ->restrictOnDelete()
                ->comment('跟进方式，字典 follow_method');
            $table->foreignId('urgency_dict_item_id')
                ->nullable()
                ->constrained('dict_items')
                ->restrictOnDelete()
                ->comment('紧急程度，字典 follow_urgency');
            $table->string('next_follow_subject', 255)->nullable();
            $table->date('next_follow_date')->nullable();
            $table->date('followed_at')->comment('本次跟进日期');
            $table->string('result', 64)->nullable()->comment('跟进结果，如成为伙伴');
            $table->timestamps();
            $table->index(['teacher_id', 'followed_at']);
        });

        Schema::create('papers', function (Blueprint $table) {
            $table->id();
            $table->string('title', 512);
            $table->string('authors', 512)->nullable();
            $table->foreignId('university_id')
                ->nullable()
                ->constrained('universities')
                ->nullOnDelete();
            $table->string('school_name', 255)->nullable()->comment('冗余学校名，便于展示');
            $table->date('published_at')->nullable();
            $table->string('url', 512)->nullable();
            $table->text('summary')->nullable();
            $table->string('source', 32)->default('manual')->comment('manual|crawl');
            $table->timestamps();
            $table->softDeletes();
        });

        Schema::create('teacher_papers', function (Blueprint $table) {
            $table->id();
            $table->foreignId('teacher_id')->constrained('teachers')->cascadeOnDelete();
            $table->foreignId('paper_id')->constrained('papers')->cascadeOnDelete();
            $table->timestamps();
            $table->unique(['teacher_id', 'paper_id']);
        });
    }

    public function down(): void
    {
        Schema::dropIfExists('teacher_papers');
        Schema::dropIfExists('papers');
        Schema::dropIfExists('teacher_follow_records');
        Schema::dropIfExists('teachers');
        Schema::dropIfExists('universities');
    }
};