package flags

import (
	"os"
	"strings"
	"time"

	"go.jolheiser.com/vanity/api"

	"github.com/pelletier/go-toml"
	"github.com/urfave/cli/v2"
	"go.jolheiser.com/beaver"
)

type tomlConfig struct {
	Port      int           `toml:"port"`
	Domain    string        `toml:"domain"`
	Service   string        `toml:"service"`
	BaseURL   string        `toml:"base_url"`
	Namespace string        `toml:"namespace"`
	Token     string        `toml:"token"`
	Include   []string      `toml:"include"`
	Exclude   []string      `toml:"exclude"`
	Private   bool          `toml:"private"`
	Fork      bool          `toml:"fork"`
	Mirror    bool          `toml:"mirror"`
	Archive   bool          `toml:"archive"`
	Override  []string      `toml:"override"`
	Interval  time.Duration `toml:"interval"`
	Debug     bool          `toml:"debug"`

	Packages []*api.Package `toml:"packages"`
}

func setConfig(ctx *cli.Context) {
	for _, env := range os.Environ() {
		kv := strings.Split(env, "=")
		if strings.HasPrefix(kv[0], "VANITY_OVERRIDES_") {
			override := strings.ToLower(strings.TrimPrefix(kv[0], "VANITY_OVERRIDES_"))
			Override[override] = kv[1]
		}
	}

	var cfg tomlConfig
	if configPath != "" {
		beaver.Infof("Loading configuration from %s", configPath)
		tree, err := toml.LoadFile(configPath)
		if err != nil {
			beaver.Errorf("Could not load configuration from %s: %v", configPath, err)
			return
		}
		if err = tree.Unmarshal(&cfg); err != nil {
			beaver.Errorf("Could not unmarshal configuration from %s: %v", configPath, err)
			return
		}
	}

	if !ctx.IsSet("port") && cfg.Port > 0 {
		Port = cfg.Port
	}
	if !ctx.IsSet("domain") && cfg.Domain != "" {
		Domain = cfg.Domain
	}
	if !ctx.IsSet("service") && cfg.Service != "" {
		Service = cfg.Service
	}
	if !ctx.IsSet("base-url") && cfg.BaseURL != "" {
		baseURL = cfg.BaseURL
	}
	if !ctx.IsSet("namespace") && cfg.Namespace != "" {
		Namespace = cfg.Namespace
	}
	if !ctx.IsSet("token") && cfg.Token != "" {
		Token = cfg.Token
	}
	if !ctx.IsSet("include") && len(cfg.Include) > 0 {
		_ = include.Set(strings.Join(cfg.Include, ","))
	}
	if !ctx.IsSet("exclude") && len(cfg.Exclude) > 0 {
		_ = exclude.Set(strings.Join(cfg.Exclude, ","))
	}
	if !ctx.IsSet("override") && len(cfg.Override) > 0 {
		_ = override.Set(strings.Join(cfg.Override, ","))
	}
	if !ctx.IsSet("private") && cfg.Private {
		Private = cfg.Private
	}
	if !ctx.IsSet("fork") && cfg.Fork {
		Fork = cfg.Fork
	}
	if !ctx.IsSet("mirror") && cfg.Mirror {
		Mirror = cfg.Mirror
	}
	if !ctx.IsSet("archive") && cfg.Archive {
		Archive = cfg.Archive
	}
	if !ctx.IsSet("interval") && cfg.Interval.Seconds() > 0 {
		Interval = cfg.Interval
	}
	if !ctx.IsSet("debug") && cfg.Debug {
		Debug = cfg.Debug
	}

	ConfigPackages = cfg.Packages
}