// Copyright (c) 2012-present The upper.io/db authors. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

package sqlite

import (
	"database/sql"

	db "github.com/upper/db/v4"
	"github.com/upper/db/v4/internal/sqladapter"
	"github.com/upper/db/v4/internal/sqlbuilder"
)

type collectionAdapter struct {
}

func (*collectionAdapter) Insert(col sqladapter.Collection, item interface{}) (interface{}, error) {
	columnNames, columnValues, err := sqlbuilder.Map(item, nil)
	if err != nil {
		return nil, err
	}

	pKey, err := col.PrimaryKeys()
	if err != nil {
		return nil, err
	}

	q := col.SQL().InsertInto(col.Name()).
		Columns(columnNames...).
		Values(columnValues...)

	var res sql.Result
	if res, err = q.Exec(); err != nil {
		return nil, err
	}

	if len(pKey) <= 1 {
		return res.LastInsertId()
	}

	keyMap := db.Cond{}

	for i := range columnNames {
		for j := 0; j < len(pKey); j++ {
			if pKey[j] == columnNames[i] {
				keyMap[pKey[j]] = columnValues[i]
			}
		}
	}

	return keyMap, nil
}