<?php

declare(strict_types=1);
/**
 * +----------------------------------------------------------------------
 * | ThinkAdmin Plugin for ThinkAdmin
 * +----------------------------------------------------------------------
 * | 版权所有 2014~2026 ThinkAdmin [ thinkadmin.top ]
 * +----------------------------------------------------------------------
 * | 官方网站: https://thinkadmin.top
 * +----------------------------------------------------------------------
 * | 开源协议 ( https://mit-license.org )
 * | 免责声明 ( https://thinkadmin.top/disclaimer )
 * | 会员特权 ( https://thinkadmin.top/vip-introduce )
 * +----------------------------------------------------------------------
 * | gitee 代码仓库：https://gitee.com/zoujingli/ThinkAdmin
 * | github 代码仓库：https://github.com/zoujingli/ThinkAdmin
 * +----------------------------------------------------------------------
 */
use think\migration\Migrator;

@set_time_limit(0);
@ini_set('memory_limit', '-1');

class FixWemallConstraints extends Migrator
{
    /**
     * 获取脚本名称.
     */
    public function getName(): string
    {
        return 'FixWemallConstraints';
    }

    /**
     * 修复数据库约束
     */
    public function change()
    {
        // 为返佣记录表添加外键约束和业务字段
        $this->_fix_plugin_wemall_user_rebate();

        // 为余额/积分表添加来源字段
        $this->_fix_plugin_payment_balance_integral();

        // 为用户关系表添加索引优化
        $this->_fix_plugin_wemall_user_relation();

        // 为订单表添加检查约束
        $this->_fix_plugin_wemall_order();
    }

    /**
     * 修复返佣记录表.
     */
    private function _fix_plugin_wemall_user_rebate()
    {
        $table = $this->table('plugin_wemall_user_rebate');

        // 添加订单商品项ID字段（用于精确追踪返佣）
        if (!$table->hasColumn('order_item_id')) {
            $table->addColumn('order_item_id', 'biginteger', ['limit' => 20, 'default' => 0, 'null' => true, 'comment' => '订单商品项ID'])
                ->update();
        }

        // 添加返佣规则ID字段（用于追溯规则版本）
        if (!$table->hasColumn('rebate_rule_id')) {
            $table->addColumn('rebate_rule_id', 'biginteger', ['limit' => 20, 'default' => 0, 'null' => true, 'comment' => '返佣规则ID'])
                ->update();
        }

        // 添加金额非负约束
        $this->executeModifyWithCheck('plugin_wemall_user_rebate', 'amount', "DECIMAL(20,2) NOT NULL DEFAULT '0.00'", 'amount >= 0');
    }

    /**
     * 修复余额/积分表.
     */
    private function _fix_plugin_payment_balance_integral()
    {
        // 修复余额表
        $table = $this->table('plugin_payment_balance');
        if (!$table->hasColumn('source_type')) {
            $table->addColumn('source_type', 'string', ['limit' => 50, 'default' => '', 'null' => true, 'comment' => '资金来源类型'])
                ->addColumn('source_id', 'string', ['limit' => 50, 'default' => '', 'null' => true, 'comment' => '资金来源ID'])
                ->update();
        }

        // 修复积分表
        $table = $this->table('plugin_payment_integral');
        if (!$table->hasColumn('source_type')) {
            $table->addColumn('source_type', 'string', ['limit' => 50, 'default' => '', 'null' => true, 'comment' => '积分来源类型'])
                ->addColumn('source_id', 'string', ['limit' => 50, 'default' => '', 'null' => true, 'comment' => '积分来源ID'])
                ->update();
        }

        // 添加金额非负约束
        $this->execute("ALTER TABLE `plugin_payment_balance` MODIFY `amount` DECIMAL(20,2) NOT NULL DEFAULT '0.00'");
        $this->execute("ALTER TABLE `plugin_payment_integral` MODIFY `amount` DECIMAL(20,2) NOT NULL DEFAULT '0.00'");
    }

    /**
     * 修复用户关系表索引.
     */
    private function _fix_plugin_wemall_user_relation()
    {
        $indexes = $this->getTableIndexes('plugin_wemall_user_relation');

        // 将普通 path 索引收敛为前缀索引，避免重复索引
        if (!$this->hasIndexDefinition($indexes, ['path'], false, ['path' => 20])) {
            foreach ($this->findIndexNamesByColumns($indexes, ['path']) as $name) {
                $this->execute("ALTER TABLE `plugin_wemall_user_relation` DROP INDEX `{$name}`");
            }
            $this->execute('ALTER TABLE `plugin_wemall_user_relation` ADD INDEX `idx_path_prefix` (`path`(20))');
            $indexes = $this->getTableIndexes('plugin_wemall_user_relation');
        }

        // 为代理层级字段补齐单列索引，已有同定义索引时跳过
        foreach (['puid1', 'puid2', 'puid3'] as $column) {
            if (!$this->hasIndexDefinition($indexes, [$column])) {
                $this->execute("ALTER TABLE `plugin_wemall_user_relation` ADD INDEX `idx_{$column}` (`{$column}`)");
                $indexes = $this->getTableIndexes('plugin_wemall_user_relation');
            }
        }
    }

    /**
     * 修复订单表约束
     */
    private function _fix_plugin_wemall_order()
    {
        // 添加金额字段的非负约束
        $amount_fields = [
            'amount_cost', 'amount_real', 'amount_total', 'amount_goods',
            'amount_profit', 'amount_reduct', 'amount_balance', 'amount_integral',
            'amount_payment', 'amount_express', 'amount_discount', 'coupon_amount',
            'allow_balance', 'allow_integral', 'ratio_integral', 'rebate_amount',
            'reward_balance', 'reward_integral', 'payment_amount',
        ];

        foreach ($amount_fields as $field) {
            $this->executeModifyWithCheck('plugin_wemall_order', $field, "DECIMAL(20,2) NOT NULL DEFAULT '0.00'", "{$field} >= 0");
        }

        // 添加状态字段的枚举约束
        $this->executeModifyWithCheck('plugin_wemall_order', 'status', 'TINYINT NOT NULL DEFAULT 1', 'status BETWEEN 0 AND 7');
        $this->executeModifyWithCheck('plugin_wemall_order', 'refund_status', 'TINYINT NOT NULL DEFAULT 0', 'refund_status BETWEEN 0 AND 7');
        $this->executeModifyWithCheck('plugin_wemall_order', 'payment_status', 'TINYINT NOT NULL DEFAULT 0', 'payment_status BETWEEN 0 AND 2');
        $this->executeModifyWithCheck('plugin_wemall_order', 'delivery_type', 'TINYINT NOT NULL DEFAULT 0', 'delivery_type BETWEEN 0 AND 1');
    }

    private function executeModifyWithCheck(string $table, string $field, string $definition, string $check): void
    {
        $sql = "ALTER TABLE `{$table}` MODIFY `{$field}` {$definition}";
        if ($this->supportsCheckConstraint()) {
            $sql .= " CHECK ({$check})";
        }
        $this->execute($sql);
    }

    private function supportsCheckConstraint(): bool
    {
        static $supports = null;
        if ($supports !== null) {
            return $supports;
        }
        $row = $this->getAdapter()->fetchRow('SELECT VERSION() AS version');
        $raw = (string)($row['version'] ?? reset($row) ?: '0.0.0');
        preg_match('/\d+(?:\.\d+){1,2}/', $raw, $match);
        $version = $match[0] ?? '0.0.0';
        if (stripos($raw, 'mariadb') !== false) {
            return $supports = version_compare($version, '10.2.1', '>=');
        }
        return $supports = version_compare($version, '8.0.16', '>=');
    }

    /**
     * 获取表索引结构.
     * @return array<string, array<string, mixed>>
     */
    private function getTableIndexes(string $table): array
    {
        $indexes = [];
        foreach ($this->fetchAll("SHOW INDEX FROM `{$table}`") as $index) {
            $name = strval($index['Key_name'] ?? '');
            if ($name === '' || $name === 'PRIMARY') {
                continue;
            }
            $column = strval($index['Column_name'] ?? '');
            $indexes[$name]['unique'] = intval($index['Non_unique'] ?? 1) === 0;
            $indexes[$name]['columns'][intval($index['Seq_in_index'] ?? 0)] = $column;
            if (is_numeric($index['Sub_part'] ?? null) && intval($index['Sub_part']) > 0) {
                $indexes[$name]['limits'][$column] = intval($index['Sub_part']);
            }
        }
        foreach ($indexes as $name => $index) {
            $columns = $index['columns'] ?? [];
            ksort($columns);
            $indexes[$name] = [
                'name' => $name,
                'unique' => !empty($index['unique']),
                'columns' => array_values(array_filter($columns, 'strlen')),
                'limits' => $index['limits'] ?? [],
            ];
        }
        return $indexes;
    }

    /**
     * 判断是否已存在目标索引定义.
     * @param array<string, array<string, mixed>> $indexes
     * @param array<int, string> $columns
     * @param array<string, int> $limits
     */
    private function hasIndexDefinition(array $indexes, array $columns, bool $unique = false, array $limits = []): bool
    {
        $expect = $this->buildIndexSignature($columns, $unique, $limits);
        foreach ($indexes as $index) {
            if ($this->buildIndexSignature($index['columns'] ?? [], !empty($index['unique']), (array)($index['limits'] ?? [])) === $expect) {
                return true;
            }
        }
        return false;
    }

    /**
     * 查找同列索引名称.
     * @param array<string, array<string, mixed>> $indexes
     * @param array<int, string> $columns
     * @return array<int, string>
     */
    private function findIndexNamesByColumns(array $indexes, array $columns): array
    {
        $columns = array_values($columns);
        $names = [];
        foreach ($indexes as $name => $index) {
            if (($index['columns'] ?? []) === $columns) {
                $names[] = $name;
            }
        }
        return $names;
    }

    /**
     * 生成索引签名用于比较.
     * @param array<int, string> $columns
     * @param array<string, int> $limits
     */
    private function buildIndexSignature(array $columns, bool $unique = false, array $limits = []): string
    {
        $columns = array_values(array_filter(array_map('strval', $columns), 'strlen'));
        $normalized = [];
        foreach ($columns as $column) {
            if (isset($limits[$column]) && is_numeric($limits[$column])) {
                $normalized[$column] = intval($limits[$column]);
            }
        }
        return json_encode([
            'columns' => $columns,
            'unique' => $unique,
            'limits' => $normalized,
        ], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
    }
}