package file

import (
	"bytes"
	"fmt"
	"io"
	"os"
	"strings"

	"github.com/labstack/echo/v4"
	"gitnet.fr/deblan/budget/backend/controller/crud"
	"gitnet.fr/deblan/budget/backend/message"
	"gitnet.fr/deblan/budget/config"
	"gitnet.fr/deblan/budget/database/model"
	f "gitnet.fr/deblan/budget/file"
)

type Controller struct {
}

func New(e *echo.Echo) *Controller {
	c := Controller{}

	e.GET("/api/filemanager/files", c.List)
	e.POST("/api/filemanager/file", c.CreateFile)
	e.POST("/api/filemanager/directory", c.CreateDirectory)
	e.GET("/api/filemanager/file/:id/:name", c.Download)
	e.DELETE("/api/filemanager/file/:id", c.Delete)

	return &c
}

func (ctrl *Controller) List(c echo.Context) error {
	if nil == model.LoadApiUser(c) {
		return c.JSON(403, crud.Error{Code: 403, Message: message.LoginRequired})
	}

	tree := f.GetTree("", config.Get().File.Path)

	return c.JSON(200, tree)
}

func (ctrl *Controller) CreateFile(c echo.Context) error {
	if nil == model.LoadApiUser(c) {
		return c.JSON(403, crud.Error{Code: 403, Message: message.LoginRequired})
	}

	file, err := c.FormFile("file")
	if err != nil {
		return c.JSON(400, crud.Error{
			Code:    400,
			Message: err.Error(),
		})
	}

	src, err := file.Open()
	if err != nil {
		return c.JSON(400, crud.Error{
			Code:    400,
			Message: err.Error(),
		})
	}

	defer src.Close()

	var buf bytes.Buffer
	io.Copy(&buf, src)

	output := searchDirectory(c.FormValue("path"), f.GetTree("", config.Get().File.Path))

	if output != nil {
		os.WriteFile(output.Path+"/"+file.Filename, buf.Bytes(), 0644)
		return c.JSON(200, true)
	}

	return c.JSON(400, false)
}

func (ctrl *Controller) CreateDirectory(c echo.Context) error {
	if nil == model.LoadApiUser(c) {
		return c.JSON(403, crud.Error{Code: 403, Message: message.LoginRequired})
	}

	type body struct {
		Directory string `json:"directory" validate:"required"`
		Path      string `json:"path" validate:"required"`
	}

	value := new(body)

	if err := c.Bind(value); err != nil {
		return c.JSON(400, crud.Error{
			Code:    400,
			Message: "Bad request",
		})
	}

	fmt.Printf("%+v\n", value)

	value.Directory = strings.ReplaceAll(value.Directory, "..", "")
	value.Directory = strings.ReplaceAll(value.Directory, "/", "")
	value.Directory = strings.ReplaceAll(value.Directory, "\\", "")
	value.Directory = strings.TrimSpace(value.Directory)

	fmt.Printf("%+v\n", value)

	if err := c.Validate(value); err != nil {
		return c.JSON(400, crud.Error{
			Code:    400,
			Message: err.Error(),
		})
	}

	output := searchDirectory(value.Path, f.GetTree("", config.Get().File.Path))

	if output != nil {
		dir := strings.ReplaceAll(output.Path+"/"+value.Directory, "//", "/")
		os.MkdirAll(dir, 0750)
		return c.JSON(200, true)
	}

	return c.JSON(400, crud.Error{
		Code:    400,
		Message: "Bad request",
	})
}

func (ctrl *Controller) Download(c echo.Context) error {
	if nil == model.LoadUser(c) {
		return c.JSON(403, crud.Error{Code: 403, Message: message.LoginRequired})
	}

	var file string
	var contentType string

	files := []f.File{}
	f.GetFiles(&files, config.Get().File.Path)

	for _, f := range files {
		if f.Id == c.Param("id") {
			file = f.Path
			contentType = f.Type
		}
	}

	if file == "" {
		return c.JSON(404, message.FileNotFound)
	}

	content, _ := os.ReadFile(file)

	return c.Blob(200, contentType, content)
}

func (ctrl *Controller) Delete(c echo.Context) error {
	if nil == model.LoadApiUser(c) {
		return c.JSON(403, crud.Error{Code: 403, Message: message.LoginRequired})
	}

	var file string

	files := []f.File{}
	directories := []f.Directory{}

	f.GetFiles(&files, config.Get().File.Path)
	f.GetDirectories(&directories, config.Get().File.Path)

	for _, f := range files {
		if f.Id == c.Param("id") {
			file = f.Path
		}
	}

	for _, f := range directories {
		if f.Id == c.Param("id") {
			file = f.Path
		}
	}

	if file == "" {
		return c.JSON(404, message.FileNotFound)
	}

	os.RemoveAll(file)

	return c.JSON(200, nil)
}

func searchDirectory(id string, tree f.Tree) *f.Tree {
	if tree.Id == id {
		return &tree
	}

	for _, tree = range tree.Directories {
		tr := searchDirectory(id, tree)

		if tr != nil {
			return tr
		}
	}

	return nil
}