package command

import (
	"fmt"
	"os"
	"runtime/debug"
	"strings"

	"github.com/cli/cli/api"
	"github.com/cli/cli/internal/config"
	"github.com/cli/cli/internal/ghinstance"
	"github.com/cli/cli/utils"
)

// Version is dynamically set by the toolchain or overridden by the Makefile.
var Version = "DEV"

// BuildDate is dynamically set at build time in the Makefile.
var BuildDate = "" // YYYY-MM-DD

func init() {
	if Version == "DEV" {
		if info, ok := debug.ReadBuildInfo(); ok && info.Main.Version != "(devel)" {
			Version = info.Main.Version
		}
	}
}

// BasicClient returns an API client for github.com only that borrows from but
// does not depend on user configuration
func BasicClient() (*api.Client, error) {
	var opts []api.ClientOption
	if verbose := os.Getenv("DEBUG"); verbose != "" {
		opts = append(opts, apiVerboseLog())
	}
	opts = append(opts, api.AddHeader("User-Agent", fmt.Sprintf("GitHub CLI %s", Version)))

	token := os.Getenv("GITHUB_TOKEN")
	if token == "" {
		if c, err := config.ParseDefaultConfig(); err == nil {
			token, _ = c.Get(ghinstance.Default(), "oauth_token")
		}
	}
	if token != "" {
		opts = append(opts, api.AddHeader("Authorization", fmt.Sprintf("token %s", token)))
	}
	return api.NewClient(opts...), nil
}

func apiVerboseLog() api.ClientOption {
	logTraffic := strings.Contains(os.Getenv("DEBUG"), "api")
	colorize := utils.IsTerminal(os.Stderr)
	return api.VerboseLog(utils.NewColorable(os.Stderr), logTraffic, colorize)
}