/*
 * Copyright 2025 coze-dev Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package database

import (
	"context"
	"errors"
	"fmt"
	"reflect"
	"strconv"
	"strings"

	"github.com/coze-dev/coze-studio/backend/api/model/crossdomain/database"
	crossdatabase "github.com/coze-dev/coze-studio/backend/crossdomain/contract/database"
	"github.com/coze-dev/coze-studio/backend/domain/workflow/entity"
	"github.com/coze-dev/coze-studio/backend/domain/workflow/entity/vo"
	"github.com/coze-dev/coze-studio/backend/domain/workflow/internal/canvas/convert"
	"github.com/coze-dev/coze-studio/backend/domain/workflow/internal/nodes"
	"github.com/coze-dev/coze-studio/backend/domain/workflow/internal/schema"
	"github.com/coze-dev/coze-studio/backend/pkg/sonic"
)

type CustomSQLConfig struct {
	DatabaseInfoID int64
	SQLTemplate    string
}

func (c *CustomSQLConfig) Adapt(_ context.Context, n *vo.Node, _ ...nodes.AdaptOption) (*schema.NodeSchema, error) {
	ns := &schema.NodeSchema{
		Key:     vo.NodeKey(n.ID),
		Type:    entity.NodeTypeDatabaseCustomSQL,
		Name:    n.Data.Meta.Title,
		Configs: c,
	}

	dsList := n.Data.Inputs.DatabaseInfoList
	if len(dsList) == 0 {
		return nil, fmt.Errorf("database info is requird")
	}
	databaseInfo := dsList[0]

	dsID, err := strconv.ParseInt(databaseInfo.DatabaseInfoID, 10, 64)
	if err != nil {
		return nil, err
	}
	c.DatabaseInfoID = dsID

	sql := n.Data.Inputs.SQL
	if len(sql) == 0 {
		return nil, fmt.Errorf("sql is requird")
	}

	c.SQLTemplate = sql

	if err = convert.SetInputsForNodeSchema(n, ns); err != nil {
		return nil, err
	}

	if err = convert.SetOutputTypesForNodeSchema(n, ns); err != nil {
		return nil, err
	}

	return ns, nil
}

func (c *CustomSQLConfig) Build(_ context.Context, ns *schema.NodeSchema, _ ...schema.BuildOption) (any, error) {
	if c.DatabaseInfoID == 0 {
		return nil, errors.New("database info id is required and greater than 0")
	}
	if c.SQLTemplate == "" {
		return nil, errors.New("sql template is required")
	}

	return &CustomSQL{
		databaseInfoID: c.DatabaseInfoID,
		sqlTemplate:    c.SQLTemplate,
		outputTypes:    ns.OutputTypes,
	}, nil
}

type CustomSQL struct {
	databaseInfoID int64
	sqlTemplate    string
	outputTypes    map[string]*vo.TypeInfo
}

func (c *CustomSQL) Invoke(ctx context.Context, input map[string]any) (map[string]any, error) {
	req := &database.CustomSQLRequest{
		DatabaseInfoID: c.databaseInfoID,
		IsDebugRun:     isDebugExecute(ctx),
		UserID:         getExecUserID(ctx),
		ConnectorID:    getConnectorID(ctx),
	}

	inputBytes, err := sonic.Marshal(input)
	if err != nil {
		return nil, err
	}

	templateSQL := ""
	templateParts := nodes.ParseTemplate(c.sqlTemplate)
	sqlParams := make([]database.SQLParam, 0, len(templateParts))
	var nilError = errors.New("field is nil")
	for _, templatePart := range templateParts {
		if !templatePart.IsVariable {
			templateSQL += templatePart.Value
			continue
		}

		templateSQL += "?"
		val, err := templatePart.Render(inputBytes, nodes.WithNilRender(func() (string, error) {
			return "", nilError
		}),
			nodes.WithCustomRender(reflect.TypeOf(false), func(val any) (string, error) {
				b := val.(bool)
				if b {
					return "1", nil
				}
				return "0", nil
			}))

		if err != nil {
			if !errors.Is(err, nilError) {
				return nil, err
			}
			sqlParams = append(sqlParams, database.SQLParam{
				IsNull: true,
			})
		} else {
			sqlParams = append(sqlParams, database.SQLParam{
				Value:  val,
				IsNull: false,
			})
		}

	}

	// replace sql template '?' to ?
	templateSQL = strings.Replace(templateSQL, "'?'", "?", -1)
	templateSQL = strings.Replace(templateSQL, "`?`", "?", -1)
	req.SQL = templateSQL
	req.Params = sqlParams
	response, err := crossdatabase.DefaultSVC().Execute(ctx, req)
	if err != nil {
		return nil, err
	}

	ret, err := responseFormatted(c.outputTypes, response)
	if err != nil {
		return nil, err
	}

	return ret, nil
}