package bokofs

import (
	"context"
	"fmt"
	"os"
	"path/filepath"
	"strings"
	"time"

	"golang.org/x/net/webdav"
	"imuslab.com/bokofs/bokofsd/mod/bokofs/bokoworker"
)

type RootRouter struct {
	parent *Server
}

// InitiateRootRouter create and prepare a virtual root file system for
// this bokoFS instance
func (s *Server) InitiateRootRouter() error {
	s.RootRouter = &RootRouter{
		parent: s,
	}
	return nil
}

func (r *RootRouter) GetRootDir(name string) string {
	if name == "" {
		return "/"
	}
	name = filepath.ToSlash(filepath.Clean(name))
	pathChunks := strings.Split(name, "/")
	reqRootPath := "/" + pathChunks[1]
	fmt.Println("Requesting Root Path: ", reqRootPath)
	reqRootPath = strings.TrimSuffix(reqRootPath, "/")
	return reqRootPath
}

func (r *RootRouter) GetWorkerByPath(name string) (*bokoworker.Worker, error) {
	reqRootPath := r.GetRootDir(name)
	targetWorker, ok := r.parent.LoadedWorkers.Load(reqRootPath)
	if !ok {
		return nil, os.ErrNotExist
	}

	return targetWorker.(*bokoworker.Worker), nil
}

func (r *RootRouter) Mkdir(ctx context.Context, name string, perm os.FileMode) error {
	// Implement the Mkdir method
	fmt.Println("Mkdir called to " + name)
	return nil
}

func (r *RootRouter) OpenFile(ctx context.Context, name string, flag int, perm os.FileMode) (webdav.File, error) {
	// Implement the OpenFile method
	fmt.Println("OpenFile called to " + name)
	if filepath.ToSlash(filepath.Base(name)) == "/" {
		//Request to the vObject base path
		thisVirtualObject := r.newVirtualObject(&vObjectProperties{
			name:    name,
			size:    0,
			mode:    os.ModeDir,
			modTime: time.Now(),
			isDir:   true,
		})

		return thisVirtualObject, nil
	}

	targetWorker, err := r.GetWorkerByPath(name)
	if err != nil {
		return nil, err
	}

	return targetWorker.Filesystem.OpenFile(ctx, name, flag, perm)
}

func (r *RootRouter) RemoveAll(ctx context.Context, name string) error {
	// Implement the RemoveAll method
	fmt.Println("RemoveAll called to " + name)
	return nil
}

func (r *RootRouter) Rename(ctx context.Context, oldName, newName string) error {
	// Implement the Rename method
	fmt.Println("Rename called from " + oldName + " to " + newName)
	return nil
}

func (r *RootRouter) Stat(ctx context.Context, name string) (os.FileInfo, error) {
	// Implement the Stat method
	fmt.Println("Stat called to " + name)
	if filepath.ToSlash(filepath.Base(name)) == "/" {
		thisVirtualObject := r.newVirtualObject(&vObjectProperties{
			name:    name,
			size:    0,
			mode:    os.ModeDir,
			modTime: time.Now(),
			isDir:   true,
		})

		thisVirtualObjectFileInfo := thisVirtualObject.GetFileInfo()

		return thisVirtualObjectFileInfo, nil
	}

	targetWorker, err := r.GetWorkerByPath(name)
	if err != nil {
		return nil, err
	}

	return targetWorker.Filesystem.Stat(ctx, name)
}

// Ensure RootRouter implements the FileSystem interface
var _ webdav.FileSystem = (*RootRouter)(nil)