package aliasmanagement

import (
	"context"
	"fmt"

	"git.x2erp.com/qdy/go-base/ctx"
	"git.x2erp.com/qdy/go-base/logger"
	"git.x2erp.com/qdy/go-base/model/response"
	"git.x2erp.com/qdy/go-base/util"
	"git.x2erp.com/qdy/go-db/factory/database"
	"git.x2erp.com/qdy/go-svc-configure/internal/tables"
	"github.com/google/uuid"
	"github.com/jmoiron/sqlx"
)

// BatchSaveTableAliasFlow 批量保存表别名字典流水记录
func BatchSaveTableAliasFlow(req *BatchTableAliasRequest, tenantID string, ctx context.Context, dbFactory *database.DBFactory, reqCtx *ctx.RequestContext) *response.QueryResult[[]tables.DicTableAliasFlowDB] {
	logger.Debug(fmt.Sprintf("BatchSaveTableAliasFlow-开始批量保存表别名字典流水，租户ID: %s, 数量: %d", tenantID, len(req.Items)))

	// 参数验证
	if tenantID == "" {
		logger.ErrorC(reqCtx, "租户ID不能为空")
		return util.CreateErrorResult[[]tables.DicTableAliasFlowDB]("租户ID不能为空", reqCtx)
	}
	if len(req.Items) == 0 {
		logger.ErrorC(reqCtx, "批量保存的表别名字典列表不能为空")
		return util.CreateErrorResult[[]tables.DicTableAliasFlowDB]("批量保存的表别名字典列表不能为空", reqCtx)
	}

	for i, item := range req.Items {
		if err := validateTableAliasRequest(&item); err != nil {
			logger.ErrorC(reqCtx, fmt.Sprintf("第%d个表别名参数验证失败: %v", i+1, err))
			return util.CreateErrorResult[[]tables.DicTableAliasFlowDB](fmt.Sprintf("第%d个表别名参数验证失败: %v", i+1, err), reqCtx)
		}
	}

	// 获取数据库连接并开始事务
	db := dbFactory.GetDB()
	tx, err := db.BeginTxx(ctx, nil)
	if err != nil {
		logger.ErrorC(reqCtx, fmt.Sprintf("开始事务失败: %v", err))
		return util.CreateErrorResult[[]tables.DicTableAliasFlowDB](fmt.Sprintf("开始事务失败: %v", err), reqCtx)
	}

	defer func() {
		if p := recover(); p != nil {
			tx.Rollback()
			panic(p)
		}
	}()

	var savedItems []tables.DicTableAliasFlowDB
	var errors []string

	// 批量处理每个表别名流水记录
	for i, item := range req.Items {
		logger.Debug(fmt.Sprintf("处理第%d个表别名流水记录: table_id=%s, table_alias=%s", i+1, item.TableID, item.TableAlias))

		// 检查是否已存在相同的流水记录（基于table_alias和tenant_id）
		exists, err := checkTableAliasFlowExists(ctx, tx, item.TableAlias, tenantID)
		if err != nil {
			errors = append(errors, fmt.Sprintf("第%d个表别名流水记录检查存在性失败: %v", i+1, err))
			continue
		}

		var tableAliasFlow tables.DicTableAliasFlowDB
		if exists {
			// 更新流水记录（保持审批状态不变）
			tableAliasFlow, err = updateTableAliasFlow(ctx, tx, &item, tenantID)
			if err != nil {
				errors = append(errors, fmt.Sprintf("第%d个表别名流水记录更新失败: %v", i+1, err))
				continue
			}
			logger.Debug(fmt.Sprintf("更新表别名流水记录成功: %s", item.TableAlias))
		} else {
			// 插入新的流水记录
			tableAliasFlow, err = insertTableAliasFlow(ctx, tx, &item, tenantID)
			if err != nil {
				errors = append(errors, fmt.Sprintf("第%d个表别名流水记录插入失败: %v", i+1, err))
				continue
			}
			logger.Debug(fmt.Sprintf("插入表别名流水记录成功: %s", item.TableAlias))
		}

		savedItems = append(savedItems, tableAliasFlow)
	}

	// 如果有错误，回滚事务
	if len(errors) > 0 {
		tx.Rollback()
		errorMsg := ""
		for i, errMsg := range errors {
			if i > 0 {
				errorMsg += "; "
			}
			errorMsg += errMsg
		}
		logger.ErrorC(reqCtx, fmt.Sprintf("批量保存表别名字典流水失败: %s", errorMsg))
		return util.CreateErrorResult[[]tables.DicTableAliasFlowDB](fmt.Sprintf("批量保存表别名字典流水失败: %s", errorMsg), reqCtx)
	}

	// 提交事务
	if err := tx.Commit(); err != nil {
		logger.ErrorC(reqCtx, fmt.Sprintf("提交事务失败: %v", err))
		return util.CreateErrorResult[[]tables.DicTableAliasFlowDB](fmt.Sprintf("提交事务失败: %v", err), reqCtx)
	}

	logger.Debug(fmt.Sprintf("成功批量保存 %d 个表别名字典流水记录", len(savedItems)))
	return util.CreateSuccessResultData[[]tables.DicTableAliasFlowDB](savedItems, reqCtx)
}

// checkTableAliasFlowExists 检查表别名流水记录是否存在（基于table_alias和tenant_id）
func checkTableAliasFlowExists(ctx context.Context, tx *sqlx.Tx, tableAlias, tenantID string) (bool, error) {
	var count int
	query := "SELECT COUNT(*) FROM dic_table_alias_flow WHERE table_alias = ? AND tenant_id = ? AND deleted_at IS NULL"
	err := tx.GetContext(ctx, &count, query, tableAlias, tenantID)
	return count > 0, err
}

// updateTableAliasFlow 更新表别名流水记录
func updateTableAliasFlow(ctx context.Context, tx *sqlx.Tx, req *TableAliasRequest, tenantID string) (tables.DicTableAliasFlowDB, error) {
	query := `
		UPDATE dic_table_alias_flow
		SET table_id = ?, updated_at = CURRENT_TIMESTAMP
		WHERE table_alias = ? AND tenant_id = ? AND deleted_at IS NULL
	`
	_, err := tx.ExecContext(ctx, query,
		req.TableID,
		req.TableAlias,
		tenantID,
	)
	if err != nil {
		return tables.DicTableAliasFlowDB{}, err
	}

	// 查询更新后的记录
	var tableAliasFlow tables.DicTableAliasFlowDB
	selectQuery := `
		SELECT id, table_id, table_alias, tenant_id, approval_status, approver, approved_at, created_at, updated_at, deleted_at
		FROM dic_table_alias_flow
		WHERE table_alias = ? AND tenant_id = ? AND deleted_at IS NULL
	`
	err = tx.GetContext(ctx, &tableAliasFlow, selectQuery, req.TableAlias, tenantID)
	return tableAliasFlow, err
}

// insertTableAliasFlow 插入表别名流水记录
func insertTableAliasFlow(ctx context.Context, tx *sqlx.Tx, req *TableAliasRequest, tenantID string) (tables.DicTableAliasFlowDB, error) {
	// 生成ID
	id := uuid.New().String()

	query := `
		INSERT INTO dic_table_alias_flow (id, table_id, table_alias, tenant_id, approval_status, created_at, updated_at)
		VALUES (?, ?, ?, ?, 0, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
	`

	_, err := tx.ExecContext(ctx, query,
		id,
		req.TableID,
		req.TableAlias,
		tenantID,
	)
	if err != nil {
		return tables.DicTableAliasFlowDB{}, err
	}

	// 查询刚插入的记录
	var tableAliasFlow tables.DicTableAliasFlowDB
	selectQuery := `
		SELECT id, table_id, table_alias, tenant_id, approval_status, approver, approved_at, created_at, updated_at, deleted_at
		FROM dic_table_alias_flow
		WHERE table_alias = ? AND tenant_id = ? AND deleted_at IS NULL
	`
	err = tx.GetContext(ctx, &tableAliasFlow, selectQuery, req.TableAlias, tenantID)
	return tableAliasFlow, err
}