package webhandler

import (
	"fmt"
	"io"
	"net/http"
	"net/url"
	"sort"

	"codeberg.org/vlbeaudoin/voki/v3"
	"git.agecem.com/agecem/agecem-org/api"
	"git.agecem.com/agecem/agecem-org/apirequest"
	"git.agecem.com/agecem/agecem-org/models"
	"github.com/labstack/echo/v4"
)

type WebHandler struct {
	ApiClient *api.API
}

func HandleIndex(c echo.Context) error {
	return c.Render(http.StatusOK, "index-html", nil)
}

/*
func HandleAPropos(c echo.Context) error {
	return c.Render(http.StatusOK, "a-propos-html", nil)
}
*/

/*
func HandleActualite(c echo.Context) error {
	return c.Render(http.StatusOK, "actualite-html", nil)
}
*/

/*
func HandleActualiteArticle(c echo.Context) error {
	article := c.Param("article")
	return c.String(http.StatusOK, fmt.Sprintf("Article: %s", article))
}
*/

func HandleVieEtudiante(c echo.Context) error {
	return c.Render(http.StatusOK, "vie-etudiante-html", nil)
}

func HandleVieEtudianteOrganisme(c echo.Context) error {
	organisme := c.Param("organisme")
	return c.String(http.StatusOK, fmt.Sprintf("Organisme: %s", organisme))
}

func (h *WebHandler) HandleDocumentation(c echo.Context) error {
	var response HandleDocumentationResponse

	v1BucketsGET, err := h.ApiClient.ListBuckets()
	if err != nil {
		response.Error = err.Error()
		response.Message = v1BucketsGET.Message
		response.SetStatusCode(v1BucketsGET.StatusCode())

		return c.Render(response.StatusCode(), "documentation-html", response)
	}

	//TODO check v1BucketsGET StatusCode and Error

	for bucket, displayName := range v1BucketsGET.Data.Buckets {
		// TODO move call to dedicated API client method
		var v1BucketReadResponse V1BucketGET

		if err = h.ApiClient.Voki.Unmarshal(http.MethodGet, fmt.Sprintf("/v1/bucket/%s", bucket), nil, true, &v1BucketReadResponse); err != nil {
			response.Error = err.Error()
			response.Message = "Error during json.Unmarshal /v1/bucket/:bucket"
			response.SetStatusCode(http.StatusInternalServerError)

			return c.Render(http.StatusOK, "documentation-html", response)
		}

		response.Data.Buckets = append(response.Data.Buckets, models.Bucket{
			Name:        bucket,
			DisplayName: displayName,
			Documents:   v1BucketReadResponse.Data.Keys,
		})
	}

	sort.SliceStable(response.Data.Buckets, func(i, j int) bool { return response.Data.Buckets[i].Name < response.Data.Buckets[j].Name })

	response.SetStatusCode(http.StatusOK)
	//response.Message = "HandleDocumentation ok"

	// TODO render .Message
	return c.Render(http.StatusOK, "documentation-html", response)
	//return c.Render(response.StatusCode(), "documentation-html", response.Data.Buckets)
}

func HandleFormulaires(c echo.Context) error {
	return c.Render(http.StatusOK, "formulaires-html", nil)
}

func (h *WebHandler) HandlePublicDocumentation(c echo.Context) error {
	bucket := c.Param("bucket")
	document := c.Param("document")

	unescaped, err := url.QueryUnescape(fmt.Sprintf("/v1/bucket/%s/%s", bucket, document))
	if err != nil {
		return c.JSON(http.StatusBadRequest, map[string]string{"message": "Bad Request"})
	}

	response, err := h.ApiClient.Voki.Call(http.MethodGet, unescaped, nil, true)
	if err != nil {
		response := voki.ResponseNotFound{}
		return c.JSON(response.StatusCode(), response)
	}
	defer response.Body.Close()

	switch response.StatusCode {
	case http.StatusNotFound:
		response := voki.ResponseNotFound{}
		return c.JSON(response.StatusCode(), response)
	case http.StatusInternalServerError:
		return c.JSON(http.StatusInternalServerError, map[string]string{"message": "Internal Server Error"})
	}

	body, err := io.ReadAll(response.Body)
	if err != nil {
		return c.JSON(http.StatusInternalServerError, map[string]string{"message": "Internal Server Error"})
	}

	return c.Blob(http.StatusOK, "application/octet-stream", body)
}

func HandleAdmin(c echo.Context) error {
	return c.Render(http.StatusOK, "admin-html", nil)
}

func (h *WebHandler) HandleAdminDocumentsUpload(c echo.Context) error {
	var response HandleAdminDocumentsUploadResponse

	v1BucketsGET, err := h.ApiClient.ListBuckets()
	if err != nil {
		response.SetStatusCode(v1BucketsGET.StatusCode())
		response.Error = err.Error()
		response.Message = v1BucketsGET.Message

		return c.Render(response.StatusCode(), "admin-upload-html", nil)
	}

	for bucketName, displayName := range v1BucketsGET.Data.Buckets {
		response.Data.Buckets = append(response.Data.Buckets, models.Bucket{
			Name:        bucketName,
			DisplayName: displayName,
		})
	}
	response.SetStatusCode(http.StatusOK)

	return c.Render(response.StatusCode(), "admin-upload-html", response)
}

func (h *WebHandler) HandleAdminDocumentsUploadPOST(c echo.Context) error {
	var request apirequest.CreateDocumentsResponse
	var response HandleAdminDocumentsUploadResponse

	v1BucketsGET, err := h.ApiClient.ListBuckets()
	if err != nil {
		response.SetStatusCode(v1BucketsGET.StatusCode())
		response.Message = v1BucketsGET.Message
		response.Error = err.Error()

		return c.Render(response.StatusCode(), "admin-upload-html", response)
	}

	for bucketName, displayName := range v1BucketsGET.Data.Buckets {
		response.Data.Buckets = append(response.Data.Buckets, models.Bucket{
			Name:        bucketName,
			DisplayName: displayName,
		})
	}

	request.Params.Bucket = c.FormValue("bucket")

	form, err := c.MultipartForm()
	if err != nil {
		response.SetStatusCode(http.StatusBadRequest)
		response.Message = "Impossible de téléverser"
		response.Error = err.Error()

		return c.Render(response.StatusCode(), "admin-upload-html", response)
	}
	if form == nil {
		response.SetStatusCode(http.StatusInternalServerError)
		response.Message = "Formulaire pointe vers une addresse mémoire nulle"
		response.Error = "Formulaire pointe vers une addresse mémoire nulle"

		return c.Render(response.StatusCode(), "admin-upload-html", response)
	}

	if len(form.File) == 0 {
		response.SetStatusCode(http.StatusBadRequest)
		response.Message = "Veuillez sélectionner au moins 1 fichier à téléverser"
		response.Error = "Input 'documents' ne contient aucun fichier"

		return c.Render(response.StatusCode(), "admin-upload-html", response)
	}

	for inputName, inputFileHeaders := range form.File {
		if inputName == "documents" {
			request.Data.Documents = inputFileHeaders
			break
		}
	}

	if request.Data.Documents == nil {
		response.SetStatusCode(http.StatusBadRequest)
		response.Message = "Impossible d'obtenir les documents depuis le formulaire"
		response.Error = "Impossible d'obtenir les documents depuis le formulaire"

		return c.Render(response.StatusCode(), "admin-upload-html", response)
	}

	uploadDocumentsResponse, err := h.ApiClient.UploadDocuments(request.Params.Bucket, request.Data.Documents...)
	if err != nil {
		//TODO figure out pourquoi `err` n'est jamais `nil`
		response.SetStatusCode(uploadDocumentsResponse.StatusCode())
		response.Message = uploadDocumentsResponse.Message
		response.Error = fmt.Sprintf("%s. Détails: %s", err.Error(), uploadDocumentsResponse.Error)
		/*
			response.SetStatusCode(http.StatusInternalServerError)
			response.Message = fmt.Sprintf("api.(*API).UploadDocuments: %s", err)
			response.Error = err.Error()
		*/

		return c.Render(response.StatusCode(), "admin-upload-html", response)
	}

	//TODO figure out pourquoi on se rend jamais ici

	// Format response
	var info, status string

	for i, document := range uploadDocumentsResponse.Data.Documents {
		info = fmt.Sprintf("%s[%d] /public/documentation/%s/%s (%dk) ok\n",
			info, i, uploadDocumentsResponse.Data.Bucket, document.Key, document.Size)
	}

	status = uploadDocumentsResponse.Message
	if errMsg := uploadDocumentsResponse.Error; errMsg != "" {
		status = fmt.Sprintf("%s. Erreur: %s", status, errMsg)
	}

	response.SetStatusCode(http.StatusOK)
	response.Message = fmt.Sprintf("%s \n %s", status, info)

	return c.Render(response.StatusCode(), "admin-upload-html", response)
}