// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
//
// This Source Code Form is subject to the terms of the MIT License.
// If a copy of the MIT was not distributed with this file,
// You can obtain one at https://github.com/gogf/gf.

package gdb

import (
	"database/sql"
	"fmt"

	"github.com/gogf/gf/v2/errors/gcode"
	"github.com/gogf/gf/v2/errors/gerror"
	"github.com/gogf/gf/v2/os/gtime"
	"github.com/gogf/gf/v2/text/gstr"
)

// Delete does "DELETE FROM ... " statement for the model.
// The optional parameter `where` is the same as the parameter of Model.Where function,
// see Model.Where.
func (m *Model) Delete(where ...interface{}) (result sql.Result, err error) {
	if len(where) > 0 {
		return m.Where(where[0], where[1:]...).Delete()
	}
	defer func() {
		if err == nil {
			m.checkAndRemoveCache()
		}
	}()
	var (
		fieldNameDelete                               = m.getSoftFieldNameDeleted()
		conditionWhere, conditionExtra, conditionArgs = m.formatCondition(false, false)
	)
	// Soft deleting.
	if !m.unscoped && fieldNameDelete != "" {
		in := &HookUpdateInput{
			internalParamHookUpdate: internalParamHookUpdate{
				internalParamHook: internalParamHook{
					db:   m.db,
					link: m.getLink(true),
				},
				handler: m.hook.Update,
			},
			Table:     m.tables,
			Data:      fmt.Sprintf(`%s=?`, m.db.GetCore().QuoteString(fieldNameDelete)),
			Condition: conditionWhere + conditionExtra,
			Args:      append([]interface{}{gtime.Now().String()}, conditionArgs...),
		}
		return in.Next(m.GetCtx())
	}
	conditionStr := conditionWhere + conditionExtra
	if !gstr.ContainsI(conditionStr, " WHERE ") {
		return nil, gerror.NewCode(
			gcode.CodeMissingParameter,
			"there should be WHERE condition statement for DELETE operation",
		)
	}

	in := &HookDeleteInput{
		internalParamHookDelete: internalParamHookDelete{
			internalParamHook: internalParamHook{
				db:   m.db,
				link: m.getLink(true),
			},
			handler: m.hook.Delete,
		},
		Table:     m.tables,
		Condition: conditionStr,
		Args:      conditionArgs,
	}
	return in.Next(m.GetCtx())
}