package cmd

import (
	"context"
	"errors"
	"fmt"
	"net/url"
	"os"
	"path/filepath"
	"strings"

	"go.jolheiser.com/vanity/cmd/flags"
	"go.jolheiser.com/vanity/contrib"
	"go.jolheiser.com/vanity/database"
	"go.jolheiser.com/vanity/go-vanity"
	"go.jolheiser.com/vanity/router"

	"github.com/AlecAivazis/survey/v2"
	"github.com/urfave/cli/v2"
	"go.jolheiser.com/beaver/color"
)

var yellow = color.FgYellow

func New() *cli.App {
	app := cli.NewApp()
	app.Name = "vanity"
	app.Usage = "Vanity Import URLs"
	app.Version = router.Version
	app.Commands = []*cli.Command{
		&Add,
		&Remove,
		&Server,
		&Update,
	}
	app.Flags = []cli.Flag{
		&cli.StringFlag{
			Name:        "server",
			Aliases:     []string{"s"},
			Usage:       "vanity server to use",
			Value:       vanity.DefaultServer,
			EnvVars:     []string{"VANITY_SERVER"},
			Destination: &flags.Server,
		},
		&cli.StringFlag{
			Name:        "token",
			Aliases:     []string{"t"},
			Usage:       "vanity auth token to use",
			DefaultText: "${VANITY_TOKEN}",
			EnvVars:     []string{"VANITY_TOKEN"},
			Destination: &flags.Token,
		},
		&cli.StringFlag{
			Name:        "database",
			Aliases:     []string{"d"},
			Usage:       "path to vanity database for server",
			Value:       dbPath(),
			DefaultText: "`${HOME}/vanity.db` or `${BINPATH}/vanity.db`",
			EnvVars:     []string{"VANITY_DATABASE"},
			Destination: &flags.Database,
		},
		&cli.BoolFlag{
			Name:        "systemd-service",
			Usage:       "Output example systemd service",
			Destination: &flags.SystemdService,
			Hidden:      true,
		},
	}
	app.Action = action
	return app
}

func action(ctx *cli.Context) error {
	if flags.SystemdService {
		fmt.Println(contrib.SystemdService)
		return nil
	}
	return cli.ShowAppHelp(ctx)
}

func dbPath() string {
	fn := "vanity.db"
	home, err := os.UserHomeDir()
	if err != nil {
		bin, err := os.Executable()
		if err != nil {
			return fn
		}
		return filepath.Join(filepath.Dir(bin), fn)
	}
	return filepath.Join(home, fn)
}

func localOrToken(_ *cli.Context) error {
	if flags.Local && flags.Token == "" {
		return errors.New("server interaction requires --token")
	}
	return nil
}

func listPackages() ([]vanity.Package, error) {
	var pkgs []vanity.Package
	if flags.Local {
		db, err := database.Load(flags.Database)
		if err != nil {
			return pkgs, err
		}
		pkgs, err = db.Packages()
		if err != nil {
			return pkgs, err
		}
	} else {
		client := vanity.New(flags.Token, vanity.WithServer(flags.Server))
		info, err := client.Info(context.Background())
		if err != nil {
			return pkgs, err
		}
		pkgs = info.Packages
	}
	return pkgs, nil
}

func pkgPrompt(def vanity.Package) (vanity.Package, error) {
	if def.Branch == "" {
		def.Branch = "main"
	}
	var pkg vanity.Package
	questions := []*survey.Question{
		{
			Name:     "name",
			Prompt:   &survey.Input{Message: "Name", Default: def.Name},
			Validate: survey.Required,
		},
		{
			Name:     "description",
			Prompt:   &survey.Multiline{Message: "Description", Default: def.Description},
			Validate: survey.Required,
		},
		{
			Name:     "branch",
			Prompt:   &survey.Input{Message: "Branch", Default: def.Branch},
			Validate: survey.Required,
		},
		{
			Name:     "weburl",
			Prompt:   &survey.Input{Message: "Web URL", Default: def.WebURL},
			Validate: validURL,
		},
	}
	if err := survey.Ask(questions, &pkg); err != nil {
		return pkg, err
	}

	defHTTP, defSSH := def.CloneHTTP, def.CloneSSH
	if def.WebURL != pkg.WebURL {
		u, err := url.Parse(pkg.WebURL)
		if err != nil {
			return pkg, err
		}
		defHTTP = pkg.WebURL + ".git"
		defSSH = fmt.Sprintf("git@%s:%s.git", u.Host, strings.TrimPrefix(u.Path, "/"))
	}

	questions = []*survey.Question{
		{
			Name:     "clonehttp",
			Prompt:   &survey.Input{Message: "HTTP(S) CLone URL", Default: defHTTP},
			Validate: validURL,
		},
		{
			Name:     "clonessh",
			Prompt:   &survey.Input{Message: "SSH CLone URL", Default: defSSH},
			Validate: survey.Required,
		},
	}
	if err := survey.Ask(questions, &pkg); err != nil {
		return pkg, err
	}

	return pkg, nil
}