package solutionmanagement

import (
	"context"
	"fmt"
	"regexp"

	"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/jmoiron/sqlx"
)

// SaveSyncSolution 保存同步方案（主表+子表）
func SaveSyncSolution(req *SyncSolutionRequest, ctx context.Context, dbFactory *database.DBFactory, reqCtx *ctx.RequestContext) *response.QueryResult[SyncSolutionDetail] {
	logger.Debug("SaveSyncSolution-开始保存同步方案")

	// 参数验证
	if err := validateSyncSolutionRequest(req); err != nil {
		logger.ErrorC(reqCtx, fmt.Sprintf("参数验证失败: %v", err))
		return util.CreateErrorResult[SyncSolutionDetail](fmt.Sprintf("参数验证失败: %v", 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[SyncSolutionDetail](fmt.Sprintf("开始事务失败: %v", err), reqCtx)
	}

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

	// 获取当前用户
	creator := reqCtx.UserID
	if creator == "" {
		creator = "system"
	}

	// 1. 处理主表：检查是否存在 → 存在则更新，不存在则插入
	solutionExists, err := checkSolutionExists(ctx, tx, req.SolutionCode)
	if err != nil {
		tx.Rollback()
		logger.ErrorC(reqCtx, fmt.Sprintf("检查方案存在性失败: %v", err))
		return util.CreateErrorResult[SyncSolutionDetail](fmt.Sprintf("检查方案存在性失败: %v", err), reqCtx)
	}

	var solution tables.SyncSolutionDB
	if solutionExists {
		// 更新主表
		solution, err = updateSolution(ctx, tx, req, creator)
		if err != nil {
			tx.Rollback()
			logger.ErrorC(reqCtx, fmt.Sprintf("更新方案失败: %v", err))
			return util.CreateErrorResult[SyncSolutionDetail](fmt.Sprintf("更新方案失败: %v", err), reqCtx)
		}
		logger.Debug(fmt.Sprintf("更新方案成功: %s", req.SolutionCode))
	} else {
		// 插入主表
		solution, err = insertSolution(ctx, tx, req, creator)
		if err != nil {
			tx.Rollback()
			logger.ErrorC(reqCtx, fmt.Sprintf("插入方案失败: %v", err))
			return util.CreateErrorResult[SyncSolutionDetail](fmt.Sprintf("插入方案失败: %v", err), reqCtx)
		}
		logger.Debug(fmt.Sprintf("插入方案成功: %s", req.SolutionCode))
	}

	// 2. 处理子表：逐条检查 → 存在则更新，不存在则新增
	var sqlScripts []tables.SyncSolutionSQLDB
	for _, script := range req.SQLScripts {
		// 设置关联的solution_id
		script.SolutionID = req.SolutionCode

		// 检查子表记录是否存在
		sqlExists, err := checkSQLScriptExists(ctx, tx, script.SyncID, req.SolutionCode)
		if err != nil {
			tx.Rollback()
			logger.ErrorC(reqCtx, fmt.Sprintf("检查SQL脚本存在性失败: %v", err))
			return util.CreateErrorResult[SyncSolutionDetail](fmt.Sprintf("检查SQL脚本存在性失败: %v", err), reqCtx)
		}

		var sqlScript tables.SyncSolutionSQLDB
		if sqlExists {
			// 更新子表
			sqlScript, err = updateSQLScript(ctx, tx, &script, creator)
			if err != nil {
				tx.Rollback()
				logger.ErrorC(reqCtx, fmt.Sprintf("更新SQL脚本失败: %v", err))
				return util.CreateErrorResult[SyncSolutionDetail](fmt.Sprintf("更新SQL脚本失败: %v", err), reqCtx)
			}
			logger.Debug(fmt.Sprintf("更新SQL脚本成功: %s", script.SyncID))
		} else {
			// 插入子表
			sqlScript, err = insertSQLScript(ctx, tx, &script, creator)
			if err != nil {
				tx.Rollback()
				logger.ErrorC(reqCtx, fmt.Sprintf("插入SQL脚本失败: %v", err))
				return util.CreateErrorResult[SyncSolutionDetail](fmt.Sprintf("插入SQL脚本失败: %v", err), reqCtx)
			}
			logger.Debug(fmt.Sprintf("插入SQL脚本成功: %s", script.SyncID))
		}
		sqlScripts = append(sqlScripts, sqlScript)
	}

	// 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[SyncSolutionDetail](fmt.Sprintf("提交事务失败: %v", err), reqCtx)
	}

	logger.Debug(fmt.Sprintf("成功保存同步方案: %s, 包含 %d 个SQL脚本", req.SolutionCode, len(sqlScripts)))

	// 构建返回结果
	detail := SyncSolutionDetail{
		Solution:   solution,
		SQLScripts: sqlScripts,
	}

	return util.CreateSuccessResultData[SyncSolutionDetail](detail, reqCtx)
}

// validateSyncSolutionRequest 验证同步方案请求
func validateSyncSolutionRequest(req *SyncSolutionRequest) error {
	if req.SolutionCode == "" {
		return fmt.Errorf("方案代码不能为空")
	}

	// 验证方案代码格式：仅允许字母、数字、下划线
	match, _ := regexp.MatchString("^[a-zA-Z0-9_]+$", req.SolutionCode)
	if !match {
		return fmt.Errorf("方案代码只能包含字母、数字、下划线")
	}

	if req.SolutionType == "" {
		return fmt.Errorf("方案类型不能为空")
	}
	// 验证方案类型
	validTypes := map[string]bool{"全量": true, "增量": true, "计算": true}
	if !validTypes[req.SolutionType] {
		return fmt.Errorf("方案类型必须是'全量'、'增量'或'计算'")
	}

	if req.SolutionName == "" {
		return fmt.Errorf("方案名称不能为空")
	}

	// 验证子表数据
	for i, script := range req.SQLScripts {
		if script.SyncID == "" {
			return fmt.Errorf("第%d个SQL脚本的同步代码不能为空", i+1)
		}
		if script.SyncName == "" {
			return fmt.Errorf("第%d个SQL脚本的同步名称不能为空", i+1)
		}
		if script.CodeSQL == "" {
			return fmt.Errorf("第%d个SQL脚本的SQL代码不能为空", i+1)
		}
		if script.CountSQL == "" {
			return fmt.Errorf("第%d个SQL脚本的统计SQL代码不能为空", i+1)
		}
		// 验证同步代码格式
		match, _ := regexp.MatchString("^[a-zA-Z0-9_.-]+$", script.SyncID)
		if !match {
			return fmt.Errorf("第%d个SQL脚本的同步代码只能包含字母、数字、下划线、点、横线", i+1)
		}
	}

	return nil
}

// checkSolutionExists 检查方案是否存在
func checkSolutionExists(ctx context.Context, tx *sqlx.Tx, solutionCode string) (bool, error) {
	var count int
	query := "SELECT COUNT(*) FROM sync_solution WHERE solution_code = ? AND deleted_at IS NULL"
	err := tx.GetContext(ctx, &count, query, solutionCode)
	return count > 0, err
}

// insertSolution 插入方案主表
func insertSolution(ctx context.Context, tx *sqlx.Tx, req *SyncSolutionRequest, creator string) (tables.SyncSolutionDB, error) {
	query := `
		INSERT INTO sync_solution (solution_code, solution_type, solution_name, description, creator)
		VALUES (?, ?, ?, ?, ?)
	`
	_, err := tx.ExecContext(ctx, query,
		req.SolutionCode,
		req.SolutionType,
		req.SolutionName,
		req.Description,
		creator,
	)
	if err != nil {
		return tables.SyncSolutionDB{}, err
	}

	// 查询刚插入的记录
	var solution tables.SyncSolutionDB
	selectQuery := `
		SELECT id, solution_code, solution_type, solution_name, description, creator, created_at, updated_at, deleted_at
		FROM sync_solution
		WHERE solution_code = ? AND deleted_at IS NULL
	`
	err = tx.GetContext(ctx, &solution, selectQuery, req.SolutionCode)
	return solution, err
}

// updateSolution 更新方案主表
func updateSolution(ctx context.Context, tx *sqlx.Tx, req *SyncSolutionRequest, creator string) (tables.SyncSolutionDB, error) {
	query := `
		UPDATE sync_solution
		SET solution_type = ?, solution_name = ?, description = ?, updated_at = CURRENT_TIMESTAMP
		WHERE solution_code = ? AND deleted_at IS NULL
	`
	_, err := tx.ExecContext(ctx, query,
		req.SolutionType,
		req.SolutionName,
		req.Description,
		req.SolutionCode,
	)
	if err != nil {
		return tables.SyncSolutionDB{}, err
	}

	// 查询更新后的记录
	var solution tables.SyncSolutionDB
	selectQuery := `
		SELECT id, solution_code, solution_type, solution_name, description, creator, created_at, updated_at, deleted_at
		FROM sync_solution
		WHERE solution_code = ? AND deleted_at IS NULL
	`
	err = tx.GetContext(ctx, &solution, selectQuery, req.SolutionCode)
	return solution, err
}

// checkSQLScriptExists 检查SQL脚本是否存在
func checkSQLScriptExists(ctx context.Context, tx *sqlx.Tx, syncID, solutionID string) (bool, error) {
	var count int
	query := "SELECT COUNT(*) FROM sync_solution_sql WHERE sync_id = ? AND solution_id = ? AND deleted_at IS NULL"
	err := tx.GetContext(ctx, &count, query, syncID, solutionID)
	return count > 0, err
}

// insertSQLScript 插入SQL脚本子表
func insertSQLScript(ctx context.Context, tx *sqlx.Tx, script *SyncSQLScript, creator string) (tables.SyncSolutionSQLDB, error) {
	query := `
		INSERT INTO sync_solution_sql (sync_id, sync_name, solution_id, code_sql, count_sql, is_active, creator)
		VALUES (?, ?, ?, ?, ?, ?, ?)
	`
	_, err := tx.ExecContext(ctx, query,
		script.SyncID,
		script.SyncName,
		script.SolutionID,
		script.CodeSQL,
		script.CountSQL,
		script.IsActive,
		creator,
	)
	if err != nil {
		return tables.SyncSolutionSQLDB{}, err
	}

	// 查询刚插入的记录
	var sqlScript tables.SyncSolutionSQLDB
	selectQuery := `
		SELECT id, sync_id, sync_name, solution_id, code_sql, count_sql, is_active, creator, created_at, updated_at, deleted_at
		FROM sync_solution_sql
		WHERE sync_id = ? AND solution_id = ? AND deleted_at IS NULL
	`
	err = tx.GetContext(ctx, &sqlScript, selectQuery, script.SyncID, script.SolutionID)
	return sqlScript, err
}

// updateSQLScript 更新SQL脚本子表
func updateSQLScript(ctx context.Context, tx *sqlx.Tx, script *SyncSQLScript, creator string) (tables.SyncSolutionSQLDB, error) {
	query := `
		UPDATE sync_solution_sql
		SET sync_name = ?, code_sql = ?, count_sql = ?, is_active = ?, updated_at = CURRENT_TIMESTAMP
		WHERE sync_id = ? AND solution_id = ? AND deleted_at IS NULL
	`
	_, err := tx.ExecContext(ctx, query,
		script.SyncName,
		script.CodeSQL,
		script.CountSQL,
		script.IsActive,
		script.SyncID,
		script.SolutionID,
	)
	if err != nil {
		return tables.SyncSolutionSQLDB{}, err
	}

	// 查询更新后的记录
	var sqlScript tables.SyncSolutionSQLDB
	selectQuery := `
		SELECT id, sync_id, sync_name, solution_id, code_sql, count_sql, is_active, creator, created_at, updated_at, deleted_at
		FROM sync_solution_sql
		WHERE sync_id = ? AND solution_id = ? AND deleted_at IS NULL
	`
	err = tx.GetContext(ctx, &sqlScript, selectQuery, script.SyncID, script.SolutionID)
	return sqlScript, err
}