package httpRequest

import (
	json2 "encoding/json"
	"maps"
	"net/http"
	"slices"
	"strings"

	"go-socket/packages/Enums/WsEventType"
	"go-socket/packages/postgresql"
	"go-socket/packages/types"
	"go-socket/packages/wsServer"

	"go-socket/packages/config"
	"go-socket/packages/convertions"
	"go-socket/packages/minio"
)

func HandleAttachmentFileUpload(response http.ResponseWriter, request *http.Request) {
	if !validCheckWithResponseOnFail(&response, request, file) {
		return
	}
	ctx := request.Context()

	user, err := getUserByToken(ctx, request.Header.Get("token"))
	if err != nil {
		http.Error(response, "invalid token", http.StatusUnauthorized)
		return
	}

	request.Body = http.MaxBytesReader(response, request.Body, int64(config.MaxRequestWithFileBytes))

	if err = request.ParseMultipartForm(int64(config.MaxRequestBytes)); err != nil {
		http.Error(response, "invalid multipart form", http.StatusBadRequest)
		return
	}

	conn, ok := getConnectionWithResponseOnFail(&response, request, user)
	if !ok {
		return
	}

	file, header, err := request.FormFile("file")
	if err != nil {
		http.Error(response, "missing file", http.StatusBadRequest)
		return
	}
	defer file.Close()

	contentType := header.Header.Get("Content-Type")
	key := minio.GetKey(&minio.GetKeyOptions{
		ConnectionId: conn.Id,
		MimeType:     contentType,
		UploadType:   minio.ConnectionFile,
	})

	if err = minio.Upload(ctx, key, file, header.Size, contentType, map[string]string{
		"originalName": header.Filename,
		"uploaderId":   user.Id.String(),
	}); err != nil {
		http.Error(response, "upload failed", http.StatusInternalServerError)
		return
	}

	response.WriteHeader(http.StatusCreated)
	response.Write([]byte(key))
}

func HandleSetUserAvatar(response http.ResponseWriter, request *http.Request) {
	if !validCheckWithResponseOnFail(&response, request, avatar) {
		return
	}
	ctx := request.Context()
	user, err := getUserByToken(ctx, request.Header.Get("token"))
	if err != nil {
		http.Error(response, "invalid token", http.StatusUnauthorized)
		return
	}

	file, header, err := request.FormFile("file")
	if err != nil {
		http.Error(response, "missing file", http.StatusBadRequest)
		return
	}
	defer file.Close()

	isImg, contentType, err := isImage(file)
	if err != nil || !isImg {
		http.Error(response, "invalid file", http.StatusBadRequest)
		return
	}

	key := minio.GetKey(&minio.GetKeyOptions{
		MimeType:   contentType,
		UploadType: minio.UserAvatar,
		UserId:     user.Id,
	})
	err = minio.Upload(ctx, key, file, header.Size, contentType, map[string]string{
		"originalName": header.Filename,
		"uploaderId":   user.Id.String(),
	})
	if err != nil {
		http.Error(response, "upload failed", http.StatusInternalServerError)
		return
	}

	if user.AvatarType != "" {
		if err = minio.Delete(ctx, user.AvatarType); err != nil {
			minio.Delete(ctx, key)
			http.Error(response, "internal server error", http.StatusInternalServerError)
			return
		}
	}
	user.AvatarType = key
	err = postgresql.UserUpdateProfile(ctx, user, &types.UserProfileUpdateList{Avatar: true})
	if err != nil {
		http.Error(response, "failed to update user avatar", http.StatusInternalServerError)
		minio.Delete(ctx, user.AvatarType)
		return
	}

	user.Mu.RLock()
	connections := slices.Collect(maps.Values(user.Connections))
	user.Mu.RUnlock()

	for _, conn := range connections {
		targetId := conn.GetSecondUser(user.Id)
		target, err := getUserById(ctx, targetId)
		if err != nil {
			continue
		}
		wsServer.WsSendMessageCloseIfTimeout(target, types.WsEventMessage{
			Type: WsEventType.UserAvatarChange,
			Event: &map[string]any{
				"userId": user.Id,
			},
		})
	}

	response.WriteHeader(http.StatusCreated)
}

func HandleGetUserAvatar(response http.ResponseWriter, request *http.Request) {
	if !validCheckWithResponseOnFail(&response, request, normal) {
		return
	}
	ctx := request.Context()

	_, err := getUserByToken(ctx, request.Header.Get("token"))
	if err != nil {
		http.Error(response, "invalid token", http.StatusUnauthorized)
		return
	}

	targetId, err := convertions.StringToUuid(request.URL.Query().Get("userid"))
	if err != nil {
		http.Error(response, "invalid userid", http.StatusBadRequest)
		return
	}

	target, err := getUserById(ctx, targetId)
	if err != nil {
		http.Error(response, "user not found", http.StatusNotFound)
		return
	}

	if target.AvatarType == "" {
		http.Error(response, "user have no avatar", http.StatusNoContent)
		return
	}

	url, meta, err := minio.GetDownloadUrlAndMetadata(ctx, target.AvatarType)
	if err != nil {
		http.Error(response, "internal server error", http.StatusInternalServerError)
		return
	}

	json, err := json2.Marshal(map[string]any{
		"url":      url.String(),
		"metadata": meta,
	})
	if err != nil {
		http.Error(response, "json error", http.StatusInternalServerError)
	}

	response.WriteHeader(http.StatusOK)
	response.Write(json)
}

func HandleSetUserProfileBg(response http.ResponseWriter, request *http.Request) {
	if !validCheckWithResponseOnFail(&response, request, profileBg) {
		return
	}
	ctx := request.Context()
	user, err := getUserByToken(ctx, request.Header.Get("token"))
	if err != nil {
		http.Error(response, "invalid token", http.StatusUnauthorized)
		return
	}

	file, header, err := request.FormFile("file")
	if err != nil {
		http.Error(response, "missing file", http.StatusBadRequest)
		return
	}
	defer file.Close()

	isImg, contentType, err := isImage(file)
	if err != nil || !isImg {
		http.Error(response, "invalid file", http.StatusBadRequest)
		return
	}

	key := minio.GetKey(&minio.GetKeyOptions{
		MimeType:   contentType,
		UploadType: minio.UserProfileBg,
		UserId:     user.Id,
	})
	err = minio.Upload(ctx, key, file, header.Size, contentType, map[string]string{
		"originalName": header.Filename,
		"uploaderId":   user.Id.String(),
	})
	if err != nil {
		http.Error(response, "upload failed", http.StatusInternalServerError)
		return
	}

	if user.ProfileBgType != "" {
		if err = minio.Delete(ctx, user.ProfileBgType); err != nil {
			minio.Delete(ctx, key)
			http.Error(response, "internal server error", http.StatusInternalServerError)
			return
		}
	}
	user.ProfileBgType = key
	err = postgresql.UserUpdateProfile(ctx, user, &types.UserProfileUpdateList{ProfileBg: true})
	if err != nil {
		http.Error(response, "failed to update user profile background", http.StatusInternalServerError)
		minio.Delete(ctx, user.ProfileBgType)
		return
	}

	user.Mu.RLock()
	connections := slices.Collect(maps.Values(user.Connections))
	user.Mu.RUnlock()

	for _, conn := range connections {
		target, err := getUserById(ctx, conn.GetSecondUser(user.Id))
		if err != nil {
			continue
		}
		wsServer.WsSendMessageCloseIfTimeout(target, types.WsEventMessage{
			Type: WsEventType.UserProfileBgChange,
			Event: &map[string]any{
				"userId": user.Id,
			},
		})
	}

	response.WriteHeader(http.StatusCreated)
}

func HandleGetUserProfileBg(response http.ResponseWriter, request *http.Request) {
	if !validCheckWithResponseOnFail(&response, request, normal) {
		return
	}
	ctx := request.Context()

	_, err := getUserByToken(ctx, request.Header.Get("token"))
	if err != nil {
		http.Error(response, "invalid token", http.StatusUnauthorized)
		return
	}

	targetId, err := convertions.StringToUuid(request.URL.Query().Get("userid"))
	if err != nil {
		http.Error(response, "invalid userid", http.StatusBadRequest)
		return
	}

	target, err := getUserById(ctx, targetId)
	if err != nil {
		http.Error(response, "user not found", http.StatusNotFound)
		return
	}

	if target.ProfileBgType == "" {
		http.Error(response, "user have no profile background", http.StatusNoContent)
		return
	}

	url, meta, err := minio.GetDownloadUrlAndMetadata(ctx, target.ProfileBgType)
	if err != nil {
		http.Error(response, "internal server error", http.StatusInternalServerError)
		return
	}

	json, err := json2.Marshal(map[string]any{
		"url":      url.String(),
		"metadata": meta,
	})
	if err != nil {
		http.Error(response, "json error", http.StatusInternalServerError)
	}

	response.WriteHeader(http.StatusOK)
	response.Write(json)
}

func HandleAttachmentFileDownload(response http.ResponseWriter, request *http.Request) {
	if !validCheckWithResponseOnFail(&response, request, normal) {
		return
	}
	ctx := request.Context()

	user, err := getUserByToken(ctx, request.Header.Get("token"))
	if err != nil {
		http.Error(response, "invalid token", http.StatusUnauthorized)
		return
	}

	conn, ok := getConnectionWithResponseOnFail(&response, request, user)
	if !ok {
		return
	}

	key := request.URL.Query().Get("key")
	if !strings.HasPrefix(key, string(minio.ConnectionFilePrefix)+conn.Id.String()+"/") {
		http.Error(response, "no such file", http.StatusUnauthorized)
		return
	}

	url, meta, err := minio.GetDownloadUrlAndMetadata(ctx, key)
	if err != nil {
		http.Error(response, "no such file", http.StatusUnauthorized)
		return
	}

	json, err := json2.Marshal(map[string]string{
		"url":          url.String(),
		"originalName": meta["originalName"],
	})
	if err != nil {
		http.Error(response, "metadata error", http.StatusInternalServerError)
		return
	}

	response.WriteHeader(http.StatusOK)
	response.Write(json)
}