/* Copyright (C) 2019, 2020, 2021, 2022, 2023, 2024, 2025 Dnote contributors
 *
 * This file is part of Dnote.
 *
 * Dnote is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Dnote is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Dnote.  If not, see <https://www.gnu.org/licenses/>.
 */

package database

import (
	"database/sql"
	_ "embed"
	"fmt"
	"path/filepath"
	"testing"

	"github.com/dnote/dnote/pkg/cli/consts"
	"github.com/dnote/dnote/pkg/cli/utils"
	"github.com/pkg/errors"
)

//go:embed schema.sql
var defaultSchemaSQL string

// GetDefaultSchemaSQL returns the default schema SQL for tests
func GetDefaultSchemaSQL() string {
	return defaultSchemaSQL
}

// MustScan scans the given row and fails a test in case of any errors
func MustScan(t *testing.T, message string, row *sql.Row, args ...interface{}) {
	err := row.Scan(args...)
	if err != nil {
		t.Fatal(errors.Wrap(errors.Wrap(err, "scanning a row"), message))
	}
}

// MustExec executes the given SQL query and fails a test if an error occurs
func MustExec(t *testing.T, message string, db *DB, query string, args ...interface{}) sql.Result {
	result, err := db.Exec(query, args...)
	if err != nil {
		t.Fatal(errors.Wrap(errors.Wrap(err, "executing sql"), message))
	}

	return result
}

// InitTestMemoryDB initializes an in-memory test database with the default schema.
func InitTestMemoryDB(t *testing.T) *DB {
	return InitTestMemoryDBRaw(t, "")
}

// InitTestFileDB initializes a file-based test database with the default schema.
func InitTestFileDB(t *testing.T) (*DB, string) {
	uuid := mustGenerateTestUUID(t)
	dbPath := filepath.Join(t.TempDir(), fmt.Sprintf("dnote-%s.db", uuid))
	db := InitTestFileDBRaw(t, dbPath)
	return db, dbPath
}

// InitTestFileDBRaw initializes a file-based test database at the specified path with the default schema.
func InitTestFileDBRaw(t *testing.T, dbPath string) *DB {
	db, err := Open(dbPath)
	if err != nil {
		t.Fatal(errors.Wrap(err, "opening database"))
	}

	if _, err := db.Exec(defaultSchemaSQL); err != nil {
		t.Fatal(errors.Wrap(err, "running schema sql"))
	}

	t.Cleanup(func() { db.Close() })
	return db
}

// InitTestMemoryDBRaw initializes an in-memory test database without marking migrations complete.
// If schemaPath is empty, uses the default schema. Used for migration testing.
func InitTestMemoryDBRaw(t *testing.T, schemaPath string) *DB {
	uuid := mustGenerateTestUUID(t)
	dbName := fmt.Sprintf("file:%s?mode=memory&cache=shared", uuid)

	db, err := Open(dbName)
	if err != nil {
		t.Fatal(errors.Wrap(err, "opening in-memory database"))
	}

	var schemaSQL string
	if schemaPath != "" {
		schemaSQL = string(utils.ReadFileAbs(schemaPath))
	} else {
		schemaSQL = defaultSchemaSQL
	}

	if _, err := db.Exec(schemaSQL); err != nil {
		t.Fatal(errors.Wrap(err, "running schema sql"))
	}

	t.Cleanup(func() { db.Close() })
	return db
}

// OpenTestDB opens the database connection to a test database
// without initializing any schema
func OpenTestDB(t *testing.T, dnoteDir string) *DB {
	dbPath := fmt.Sprintf("%s/%s/%s", dnoteDir, consts.DnoteDirName, consts.DnoteDBFileName)
	db, err := Open(dbPath)
	if err != nil {
		t.Fatal(errors.Wrap(err, "opening database connection to the test database"))
	}

	return db
}

// mustGenerateTestUUID generates a UUID for test databases and fails the test on error
func mustGenerateTestUUID(t *testing.T) string {
	uuid, err := utils.GenerateUUID()
	if err != nil {
		t.Fatal(errors.Wrap(err, "generating UUID for test database"))
	}
	return uuid
}