<?php

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

/** Per-category rebate/backflow tiers replace the three global config values. */
return new class extends Migration {
    private const FIELDS = ['rebate', 'huishui_percentage', 'benefits_bibi_return'];

    public function up(): void
    {
        Schema::create('rebate_rules', function (Blueprint $t) {
            $t->engine = 'InnoDB';
            $t->id();
            $t->string('category', 32)->comment('游戏分类，与分享返佣分类标识一致');
            $t->integer('level')->comment('会员等级 level.level');
            $t->decimal('min_effective_amount', 20, 2)->default(0)->comment('有效投注门槛');
            $t->decimal('percentage', 8, 4)->default(0)->comment('返还百分比，0.8 表示 0.8%');
            $t->decimal('turnover_multiple', 8, 2)->default(0)->comment('打码量倍数，0 表示无');
            $t->timestamps();
            $t->unique(['category', 'level', 'min_effective_amount'], 'rebate_rules_tier_unique');
        });
        Schema::create('backflow_rules', function (Blueprint $t) {
            $t->engine = 'InnoDB';
            $t->id();
            $t->string('category', 32)->comment('游戏分类，与分享返佣分类标识一致');
            $t->decimal('min_loss_amount', 20, 2)->default(0)->comment('亏损金额门槛');
            $t->decimal('reward_amount', 20, 2)->default(0)->comment('奖励金额');
            $t->decimal('turnover_multiple', 8, 2)->default(0)->comment('打码量倍数，0 表示无');
            $t->timestamps();
            $t->unique(['category', 'min_loss_amount'], 'backflow_rules_tier_unique');
        });
        Schema::table('rebates', function (Blueprint $t) {
            $t->json('details')->nullable()->comment('分类明细');
            $t->decimal('need_flow', 20, 2)->default(0)->comment('需要打码量');
        });
        Schema::table('rebates', function (Blueprint $t) {
            $t->decimal('rebate_ratio', 12, 6)->nullable()->comment('综合返还比例')->change();
        });
        Schema::table('backflow', function (Blueprint $t) {
            $t->decimal('loss_amount', 20, 2)->default(0)->comment('分类净亏损合计');
            $t->json('details')->nullable()->comment('分类明细');
            $t->decimal('need_flow', 20, 2)->default(0)->comment('需要打码量');
        });
        if (Schema::hasTable('share_bet_facts')) {
            Schema::table('share_bet_facts', function (Blueprint $t) {
                $t->index('updated_at', 'share_bet_facts_updated_at_index');
            });
        }
        // Keep the old values in the down() path, so rollback restores what operators had.
        $old = DB::table('config')->whereIn('field', self::FIELDS)->get()->map(fn ($row) => (array) $row)->all();
        Schema::create('reward_rule_config_backup', function (Blueprint $t) {
            $t->string('field', 64)->primary(); $t->json('row');
        });
        foreach ($old as $row) {
            DB::table('reward_rule_config_backup')->insert(['field' => $row['field'], 'row' => json_encode($row, JSON_UNESCAPED_UNICODE)]);
        }
        DB::table('config')->whereIn('field', self::FIELDS)->delete();
    }

    public function down(): void
    {
        if (Schema::hasTable('reward_rule_config_backup')) {
            foreach (DB::table('reward_rule_config_backup')->get() as $backup) {
                $row = json_decode($backup->row, true);
                if (!DB::table('config')->where('field', $row['field'])->exists()) DB::table('config')->insert($row);
            }
            Schema::drop('reward_rule_config_backup');
        }
        if (Schema::hasTable('share_bet_facts')) {
            Schema::table('share_bet_facts', function (Blueprint $t) {
                $t->dropIndex('share_bet_facts_updated_at_index');
            });
        }
        Schema::table('backflow', function (Blueprint $t) {
            $t->dropColumn(['loss_amount', 'details', 'need_flow']);
        });
        Schema::table('rebates', function (Blueprint $t) {
            $t->dropColumn(['details', 'need_flow']);
        });
        Schema::dropIfExists('backflow_rules');
        Schema::dropIfExists('rebate_rules');
    }
};