/* SPDX-License-Identifier: MIT */
/*
 * Author: Jianhui Zhao <zhaojh329@gmail.com>
 */

package main

import (
	"fmt"

	"github.com/kylelemons/go-gypsy/yaml"
	"github.com/urfave/cli/v3"
)

type Config struct {
	AddrDev       string
	AddrUser      string
	AddrHttpProxy string

	HttpProxyRedirURL    string
	HttpProxyRedirDomain string

	Token        string
	DevHookUrl   string
	UserHookUrl  string
	LocalAuth    bool
	Password     string
	AllowOrigins bool

	PprofAddr string

	SslCert string
	SslKey  string
	CaCert  string
}

func (cfg *Config) Parse(c *cli.Command) error {
	var yamlCfg *yaml.File
	var err error

	conf := c.String("conf")
	if conf != "" {
		yamlCfg, err = yaml.ReadFile(conf)
		if err != nil {
			return fmt.Errorf(`read config file: %s`, err.Error())
		}

	}

	fields := map[string]any{
		"addr-dev":        &cfg.AddrDev,
		"addr-user":       &cfg.AddrUser,
		"addr-http-proxy": &cfg.AddrHttpProxy,

		"http-proxy-redir-url":    &cfg.HttpProxyRedirURL,
		"http-proxy-redir-domain": &cfg.HttpProxyRedirDomain,

		"token":         &cfg.Token,
		"dev-hook-url":  &cfg.DevHookUrl,
		"user-hook-url": &cfg.UserHookUrl,
		"local-auth":    &cfg.LocalAuth,
		"password":      &cfg.Password,
		"allow-origins": &cfg.AllowOrigins,

		"pprof": &cfg.PprofAddr,

		"sslcert": &cfg.SslCert,
		"sslkey":  &cfg.SslKey,
		"cacert":  &cfg.CaCert,
	}

	for name, opt := range fields {
		if yamlCfg != nil {
			if err = getConfigOpt(yamlCfg, name, opt); err != nil {
				return err
			}
		}

		getFlagOpt(c, name, opt)
	}

	return nil
}

func getConfigOpt(yamlCfg *yaml.File, name string, opt any) error {
	var err error

	switch opt := opt.(type) {
	case *string:
		var val string
		val, err = yamlCfg.Get(name)
		if err == nil {
			*opt = val
		}
	case *int:
		var val int64
		val, err = yamlCfg.GetInt(name)
		if err == nil {
			*opt = int(val)
		}
	case *bool:
		var val bool
		val, err = yamlCfg.GetBool(name)
		if err == nil {
			*opt = val
		}
	default:
		return fmt.Errorf("unsupported type for option %s", name)
	}

	if err != nil {
		if _, ok := err.(*yaml.NodeNotFound); ok {
			return nil
		}
		return fmt.Errorf(`invalud "%s": %w`, name, err)
	}

	return nil
}

func getFlagOpt(c *cli.Command, name string, opt any) {
	if !c.IsSet(name) {
		return
	}

	switch opt := opt.(type) {
	case *string:
		*opt = c.String(name)
	case *int:
		*opt = c.Int(name)
	case *bool:
		*opt = c.Bool(name)
	}
}