package cmd

import (
	"context"
	"errors"
	"fmt"
	"io"
	"os"
	"strings"
	"text/tabwriter"

	"github.com/navidrome/navidrome/conf"
	"github.com/navidrome/navidrome/core/auth"
	"github.com/navidrome/navidrome/db"
	"github.com/navidrome/navidrome/log"
	"github.com/navidrome/navidrome/model"
	"github.com/navidrome/navidrome/model/request"
	"github.com/navidrome/navidrome/persistence"
)

// existingDBFile returns the database file (DbPath minus DSN params), and whether it exists.
func existingDBFile() (string, bool) {
	path, _, _ := strings.Cut(conf.Server.DbPath, "?")
	_, err := os.Stat(path)
	return path, err == nil
}

// requireExistingDB aborts the command when the database file does not exist.
func requireExistingDB() {
	if path, ok := existingDBFile(); !ok {
		log.Fatal("No existing database", "path", path)
	}
}

func confirmYES(warning string) bool {
	fmt.Println(warning)
	fmt.Printf("Please enter YES (all caps) to continue: ")
	var input string
	_, err := fmt.Scanln(&input)
	return input == "YES" && err == nil
}

// newTabWriter keeps every CLI table on the same column settings.
func newTabWriter(out io.Writer) *tabwriter.Writer {
	return tabwriter.NewWriter(out, 0, 4, 2, ' ', 0)
}

func getAdminContext(ctx context.Context) (model.DataStore, context.Context) {
	sqlDB := db.Db()
	ds := persistence.New(sqlDB)
	ctx = auth.WithAdminUser(ctx, ds)
	u, _ := request.UserFrom(ctx)
	if !u.IsAdmin {
		log.Fatal(ctx, "There must be at least one admin user to run this command.")
	}
	return ds, ctx
}

func getUser(ctx context.Context, id string, ds model.DataStore) (*model.User, error) {
	user, err := ds.User().FindByUsername(ctx, id)

	if err != nil && !errors.Is(err, model.ErrNotFound) {
		return nil, fmt.Errorf("finding user by name: %w", err)
	}

	if errors.Is(err, model.ErrNotFound) {
		user, err = ds.User().Get(ctx, id)
		if err != nil {
			return nil, fmt.Errorf("finding user by id: %w", err)
		}
	}

	return user, nil
}