package db

import (
	"regexp"
	"strings"

	"github.com/alist-org/alist/v3/internal/conf"
	"github.com/alist-org/alist/v3/internal/model"
	"github.com/alist-org/alist/v3/pkg/utils"
	"github.com/pkg/errors"
	log "github.com/sirupsen/logrus"
)

type SettingItemHook func(item *model.SettingItem) error

var settingItemHooks = map[string]SettingItemHook{
	conf.VideoTypes: func(item *model.SettingItem) error {
		conf.TypesMap[conf.VideoTypes] = strings.Split(item.Value, ",")
		return nil
	},
	conf.AudioTypes: func(item *model.SettingItem) error {
		conf.TypesMap[conf.AudioTypes] = strings.Split(item.Value, ",")
		return nil
	},
	conf.ImageTypes: func(item *model.SettingItem) error {
		conf.TypesMap[conf.ImageTypes] = strings.Split(item.Value, ",")
		return nil
	},
	conf.TextTypes: func(item *model.SettingItem) error {
		conf.TypesMap[conf.TextTypes] = strings.Split(item.Value, ",")
		return nil
	},
	conf.ProxyTypes: func(item *model.SettingItem) error {
		conf.TypesMap[conf.ProxyTypes] = strings.Split(item.Value, ",")
		return nil
	},

	conf.PrivacyRegs: func(item *model.SettingItem) error {
		regStrs := strings.Split(item.Value, "\n")
		regs := make([]*regexp.Regexp, 0, len(regStrs))
		for _, regStr := range regStrs {
			reg, err := regexp.Compile(regStr)
			if err != nil {
				return errors.WithStack(err)
			}
			regs = append(regs, reg)
		}
		conf.PrivacyReg = regs
		return nil
	},
	conf.FilenameCharMapping: func(item *model.SettingItem) error {
		err := utils.Json.UnmarshalFromString(item.Value, &conf.FilenameCharMap)
		if err != nil {
			return err
		}
		log.Debugf("filename char mapping: %+v", conf.FilenameCharMap)
		return nil
	},
}

func HandleSettingItem(item *model.SettingItem) (bool, error) {
	if hook, ok := settingItemHooks[item.Key]; ok {
		return true, hook(item)
	}
	return false, nil
}

func RegisterSettingItemHook(key string, hook SettingItemHook) {
	settingItemHooks[key] = hook
}

// func HandleSettingItems(items []model.SettingItem) error {
// 	for i := range items {
// 		if err := HandleSettingItem(&items[i]); err != nil {
// 			return err
// 		}
// 	}
// 	return nil
// }