package webdav

import (
	"context"
	"net/http"
	"os"
	"path"
	"time"

	"github.com/alist-org/alist/v3/internal/driver"
	"github.com/alist-org/alist/v3/internal/errs"
	"github.com/alist-org/alist/v3/internal/model"
	"github.com/alist-org/alist/v3/pkg/cron"
	"github.com/alist-org/alist/v3/pkg/gowebdav"
	"github.com/alist-org/alist/v3/pkg/utils"
)

type WebDav struct {
	model.Storage
	Addition
	client *gowebdav.Client
	cron   *cron.Cron
}

func (d *WebDav) Config() driver.Config {
	return config
}

func (d *WebDav) GetAddition() driver.Additional {
	return d.Addition
}

func (d *WebDav) Init(ctx context.Context, storage model.Storage) error {
	d.Storage = storage
	err := utils.Json.UnmarshalFromString(d.Storage.Addition, &d.Addition)
	if err != nil {
		return err
	}
	err = d.setClient()
	if err == nil {
		d.cron = cron.NewCron(time.Hour * 12)
		d.cron.Do(func() {
			_ = d.setClient()
		})
	}
	return err
}

func (d *WebDav) Drop(ctx context.Context) error {
	if d.cron != nil {
		d.cron.Stop()
	}
	return nil
}

func (d *WebDav) List(ctx context.Context, dir model.Obj, args model.ListArgs) ([]model.Obj, error) {
	files, err := d.client.ReadDir(dir.GetPath())
	if err != nil {
		return nil, err
	}
	return utils.SliceConvert(files, func(src os.FileInfo) (model.Obj, error) {
		return &model.Object{
			Name:     src.Name(),
			Size:     src.Size(),
			Modified: src.ModTime(),
			IsFolder: src.IsDir(),
		}, nil
	})
}

//func (d *WebDav) Get(ctx context.Context, path string) (model.Obj, error) {
//	// this is optional
//	return nil, errs.NotImplement
//}

func (d *WebDav) Link(ctx context.Context, file model.Obj, args model.LinkArgs) (*model.Link, error) {
	callback := func(r *http.Request) {
		if args.Header.Get("Range") != "" {
			r.Header.Set("Range", args.Header.Get("Range"))
		}
		if args.Header.Get("If-Range") != "" {
			r.Header.Set("If-Range", args.Header.Get("If-Range"))
		}
	}
	reader, header, err := d.client.ReadStream(file.GetPath(), callback)
	if err != nil {
		return nil, err
	}
	link := &model.Link{Data: reader}
	if header.Get("Content-Range") != "" {
		link.Status = 206
		link.Header = header
	}
	return link, nil
}

func (d *WebDav) MakeDir(ctx context.Context, parentDir model.Obj, dirName string) error {
	return d.client.MkdirAll(path.Join(parentDir.GetPath(), dirName), 0644)
}

func (d *WebDav) Move(ctx context.Context, srcObj, dstDir model.Obj) error {
	return d.client.Rename(srcObj.GetPath(), path.Join(dstDir.GetPath(), srcObj.GetName()), true)
}

func (d *WebDav) Rename(ctx context.Context, srcObj model.Obj, newName string) error {
	return d.client.Rename(srcObj.GetPath(), path.Join(path.Dir(srcObj.GetPath()), newName), true)
}

func (d *WebDav) Copy(ctx context.Context, srcObj, dstDir model.Obj) error {
	return d.client.Copy(srcObj.GetPath(), path.Join(dstDir.GetPath(), srcObj.GetName()), true)
}

func (d *WebDav) Remove(ctx context.Context, obj model.Obj) error {
	return d.client.RemoveAll(obj.GetPath())
}

func (d *WebDav) Put(ctx context.Context, dstDir model.Obj, stream model.FileStreamer, up driver.UpdateProgress) error {
	callback := func(r *http.Request) {
		r.Header.Set("Content-Type", stream.GetMimetype())
		r.ContentLength = stream.GetSize()
	}
	err := d.client.WriteStream(path.Join(dstDir.GetPath(), stream.GetName()), stream, 0644, callback)
	return err
}

func (d *WebDav) Other(ctx context.Context, args model.OtherArgs) (interface{}, error) {
	return nil, errs.NotSupport
}

var _ driver.Driver = (*WebDav)(nil)