package data

import (
	"context"
	"errors"
	"fmt"
	"path/filepath"

	"github.com/go-rat/utils/hash"
	"github.com/knadh/koanf/v2"
	"github.com/spf13/cast"
	"gopkg.in/yaml.v3"
	"gorm.io/gorm"

	"github.com/tnb-labs/panel/internal/app"
	"github.com/tnb-labs/panel/internal/biz"
	"github.com/tnb-labs/panel/internal/http/request"
	"github.com/tnb-labs/panel/pkg/cert"
	"github.com/tnb-labs/panel/pkg/firewall"
	"github.com/tnb-labs/panel/pkg/io"
	"github.com/tnb-labs/panel/pkg/os"
	"github.com/tnb-labs/panel/pkg/types"
)

type settingRepo struct {
	db   *gorm.DB
	conf *koanf.Koanf
	task biz.TaskRepo
}

func NewSettingRepo(db *gorm.DB, conf *koanf.Koanf, task biz.TaskRepo) biz.SettingRepo {
	return &settingRepo{
		db:   db,
		conf: conf,
		task: task,
	}
}

func (r *settingRepo) Get(key biz.SettingKey, defaultValue ...string) (string, error) {
	setting := new(biz.Setting)
	if err := r.db.Where("key = ?", key).First(setting).Error; err != nil {
		if !errors.Is(err, gorm.ErrRecordNotFound) {
			return "", err
		}
	}

	if setting.Value == "" && len(defaultValue) > 0 {
		return defaultValue[0], nil
	}

	return setting.Value, nil
}

func (r *settingRepo) GetBool(key biz.SettingKey, defaultValue ...bool) (bool, error) {
	setting := new(biz.Setting)
	if err := r.db.Where("key = ?", key).First(setting).Error; err != nil {
		if !errors.Is(err, gorm.ErrRecordNotFound) {
			return false, err
		}
	}

	if setting.Value == "" && len(defaultValue) > 0 {
		return defaultValue[0], nil
	}

	return cast.ToBool(setting.Value), nil
}

func (r *settingRepo) Set(key biz.SettingKey, value string) error {
	setting := new(biz.Setting)
	if err := r.db.Where("key = ?", key).First(setting).Error; err != nil {
		if !errors.Is(err, gorm.ErrRecordNotFound) {
			return err
		}
	}

	setting.Key = key
	setting.Value = value
	return r.db.Save(setting).Error
}

func (r *settingRepo) Delete(key biz.SettingKey) error {
	setting := new(biz.Setting)
	if err := r.db.Where("key = ?", key).Delete(setting).Error; err != nil {
		return err
	}

	return nil
}

func (r *settingRepo) GetPanelSetting(ctx context.Context) (*request.PanelSetting, error) {
	name, err := r.Get(biz.SettingKeyName)
	if err != nil {
		return nil, err
	}
	offlineMode, err := r.Get(biz.SettingKeyOfflineMode)
	if err != nil {
		return nil, err
	}
	websitePath, err := r.Get(biz.SettingKeyWebsitePath)
	if err != nil {
		return nil, err
	}
	backupPath, err := r.Get(biz.SettingKeyBackupPath)
	if err != nil {
		return nil, err
	}

	userID := cast.ToUint(ctx.Value("user_id"))
	user := new(biz.User)
	if err := r.db.Where("id = ?", userID).First(user).Error; err != nil {
		return nil, err
	}

	crt, err := io.Read(filepath.Join(app.Root, "panel/storage/cert.pem"))
	if err != nil {
		return nil, err
	}
	key, err := io.Read(filepath.Join(app.Root, "panel/storage/cert.key"))
	if err != nil {
		return nil, err
	}

	return &request.PanelSetting{
		Name:        name,
		Locale:      r.conf.String("app.locale"),
		Entrance:    r.conf.String("http.entrance"),
		OfflineMode: cast.ToBool(offlineMode),
		WebsitePath: websitePath,
		BackupPath:  backupPath,
		Username:    user.Username,
		Email:       user.Email,
		Port:        uint(r.conf.Int("http.port")),
		HTTPS:       r.conf.Bool("http.tls"),
		Cert:        crt,
		Key:         key,
	}, nil
}

func (r *settingRepo) UpdatePanelSetting(ctx context.Context, setting *request.PanelSetting) (bool, error) {
	if err := r.Set(biz.SettingKeyName, setting.Name); err != nil {
		return false, err
	}
	if err := r.Set(biz.SettingKeyOfflineMode, cast.ToString(setting.OfflineMode)); err != nil {
		return false, err
	}
	if err := r.Set(biz.SettingKeyWebsitePath, setting.WebsitePath); err != nil {
		return false, err
	}
	if err := r.Set(biz.SettingKeyBackupPath, setting.BackupPath); err != nil {
		return false, err
	}

	// 用户
	user := new(biz.User)
	userID := cast.ToUint(ctx.Value("user_id"))
	if err := r.db.Where("id = ?", userID).First(user).Error; err != nil {
		return false, err
	}

	user.Username = setting.Username
	user.Email = setting.Email
	if setting.Password != "" {
		value, err := hash.NewArgon2id().Make(setting.Password)
		if err != nil {
			return false, err
		}
		user.Password = value
	}
	if err := r.db.Save(user).Error; err != nil {
		return false, err
	}

	// 下面是需要需要重启的设置
	// 面板HTTPS
	restartFlag := false
	oldCert, _ := io.Read(filepath.Join(app.Root, "panel/storage/cert.pem"))
	oldKey, _ := io.Read(filepath.Join(app.Root, "panel/storage/cert.key"))
	if oldCert != setting.Cert || oldKey != setting.Key {
		if r.task.HasRunningTask() {
			return false, errors.New("后台任务正在运行，禁止修改部分设置，请稍后再试")
		}
		restartFlag = true
	}
	if _, err := cert.ParseCert(setting.Cert); err != nil {
		return false, fmt.Errorf("failed to parse certificate: %w", err)
	}
	if _, err := cert.ParseKey(setting.Key); err != nil {
		return false, fmt.Errorf("failed to parse private key: %w", err)
	}
	if err := io.Write(filepath.Join(app.Root, "panel/storage/cert.pem"), setting.Cert, 0644); err != nil {
		return false, err
	}
	if err := io.Write(filepath.Join(app.Root, "panel/storage/cert.key"), setting.Key, 0644); err != nil {
		return false, err
	}

	// 面板主配置
	config := new(types.PanelConfig)
	raw, err := io.Read("/usr/local/etc/panel/config.yml")
	if err != nil {
		return false, err
	}
	if err = yaml.Unmarshal([]byte(raw), config); err != nil {
		return false, err
	}

	if setting.Port != config.HTTP.Port {
		if os.TCPPortInUse(setting.Port) {
			return false, errors.New("端口已被占用")
		}
	}

	config.App.Locale = setting.Locale
	config.HTTP.Port = setting.Port
	config.HTTP.Entrance = setting.Entrance
	config.HTTP.TLS = setting.HTTPS

	// 放行端口
	fw := firewall.NewFirewall()
	err = fw.Port(firewall.FireInfo{
		Type:      firewall.TypeNormal,
		PortStart: config.HTTP.Port,
		PortEnd:   config.HTTP.Port,
		Direction: firewall.DirectionIn,
		Strategy:  firewall.StrategyAccept,
	}, firewall.OperationAdd)
	if err != nil {
		return false, err
	}

	encoded, err := yaml.Marshal(config)
	if err != nil {
		return false, err
	}
	if raw != string(encoded) {
		if r.task.HasRunningTask() {
			return false, errors.New("后台任务正在运行，禁止修改部分设置，请稍后再试")
		}
		restartFlag = true
	}
	if err = io.Write("/usr/local/etc/panel/config.yml", string(encoded), 0644); err != nil {
		return false, err
	}

	return restartFlag, nil
}