package gitea

import (
	"bufio"
	"fmt"
	"os"
	"path/filepath"
	"strings"
	"syscall"

	"code.gitea.io/sdk/gitea"
	"github.com/pkg/errors"
	"golang.org/x/crypto/ssh/terminal"
)

type Options struct {
	gitea.CreateReleaseOption
	Attachments []string
	Token       string
	Username    string
	Password    string
	BaseURL     string
}

type OptionFunc func(*Options)

func WithAttachments(attachments ...string) OptionFunc {
	return func(opts *Options) {
		opts.Attachments = attachments
	}
}

func WithAttachmentPatterns(patterns ...string) OptionFunc {
	attachments := make([]string, 0)
	for _, p := range patterns {
		files, err := filepath.Glob(p)
		if err != nil {
			panic(errors.Wrapf(err, "error while searching files matching '%s' pattern", p))
		}
		attachments = append(attachments, files...)
	}
	return WithAttachments(attachments...)
}

func WithBaseURL(baseURL string) OptionFunc {
	return func(opts *Options) {
		opts.BaseURL = baseURL
	}
}

func WithInteractivePassword() OptionFunc {
	return func(opts *Options) {
		fmt.Print("Enter Password: ")
		password, err := terminal.ReadPassword(syscall.Stdin)
		fmt.Print("\n")
		if err != nil {
			panic(errors.Wrap(err, "error while asking password"))
		}
		opts.Password = strings.TrimSpace(string(password))
	}
}

func WithInteractiveUsername() OptionFunc {
	return func(opts *Options) {
		username, err := ask("Enter Username:", "")
		if err != nil {
			panic(errors.Wrap(err, "error while asking username"))
		}
		opts.Username = username
	}
}

func WithEnvUsername() OptionFunc {
	return func(opts *Options) {
		opts.Username = os.Getenv("GITEA_USERNAME")
	}
}

func WithEnvPassword() OptionFunc {
	return func(opts *Options) {
		opts.Password = os.Getenv("GITEA_PASSWORD")
	}
}

func WithAutoUsername() OptionFunc {
	envUsername := WithEnvUsername()
	interactiveUsername := WithInteractiveUsername()
	return func(opts *Options) {
		envUsername(opts)
		if opts.Username != "" {
			return
		}
		interactiveUsername(opts)
	}
}

func WithAutoPassword() OptionFunc {
	envPassword := WithEnvPassword()
	interactivePassword := WithInteractivePassword()
	return func(opts *Options) {
		envPassword(opts)
		if opts.Password != "" {
			return
		}
		interactivePassword(opts)
	}
}

func WithInteractiveTarget() OptionFunc {
	return func(opts *Options) {
		target, err := ask("Enter Target:", CurrentRevision())
		if err != nil {
			panic(errors.Wrap(err, "error while asking target"))
		}
		opts.Target = target
	}
}

func WithInteractiveTag() OptionFunc {
	return func(opts *Options) {
		tagName, err := ask("Enter Tag:", LatestTag())
		if err != nil {
			panic(errors.Wrap(err, "error while asking tag"))
		}
		opts.TagName = tagName
	}
}

func WithInteractiveTitle() OptionFunc {
	return func(opts *Options) {
		defaultTitle := fmt.Sprintf("Release %s", LatestTag())
		title, err := ask("Enter Title:", defaultTitle)
		if err != nil {
			panic(errors.Wrap(err, "error while asking title"))
		}
		opts.Title = title
	}
}

func ask(question, defaultValue string) (string, error) {
	reader := bufio.NewReader(os.Stdin)
	if defaultValue != "" {
		fmt.Printf("%s (default: %s) ", question, defaultValue)
	} else {
		fmt.Printf("%s ", question)
	}
	res, err := reader.ReadString('\n')
	if err != nil {
		return "", err
	}
	result := strings.TrimSpace(res)
	if result == "" {
		return defaultValue, nil
	}
	return result, nil
}

func defaultOptions() *Options {
	return &Options{
		CreateReleaseOption: gitea.CreateReleaseOption{
			IsDraft:      false,
			IsPrerelease: true,
			Note:         "",
			Target:       "master",
			Title:        "test",
			TagName:      "test",
		},
		Attachments: make([]string, 0),
	}
}