package httpRequest

import (
	json2 "encoding/json"
	"net/http"
	"time"

	"go-socket/packages/convertions"
	"go-socket/packages/globals"
	"go-socket/packages/minio"

	"go-socket/packages/cache"
	"go-socket/packages/passwords"
	"go-socket/packages/postgresql"
	"go-socket/packages/tokens"
	"go-socket/packages/types"

	"golang.org/x/crypto/bcrypt"
)

func HandleUserNewToken(response http.ResponseWriter, request *http.Request) {
	if !postValidCheckWithResponseOnFail(&response, request, postNormal) {
		return
	}

	username := request.FormValue("username")
	if len(username) < 4 {
		http.Error(response, "no or short username", http.StatusBadRequest)
		return
	}

	password := request.FormValue("password")

	if len(password) < 8 {
		http.Error(response, "no or short passwords", http.StatusBadRequest)
		return
	}

	var (
		user *types.User
		err  error
		ctx  = request.Context()
	)

	user, err = cache.CacheGetUserByName(username)
	if err != nil {
		user = &types.User{Name: username}
		if err = postgresql.UserGetStandardInfoByName(ctx, user); err != nil {
			http.Error(response, "bad login", http.StatusUnauthorized)
			return
		}
		if err = postgresql.GetWholeUser(ctx, user); err != nil {
			http.Error(response, err.Error(), http.StatusInternalServerError)
			return
		}
	}

	err = bcrypt.CompareHashAndPassword([]byte(user.PasswordHash), []byte(password))
	if err != nil {
		http.Error(response, "bad login", http.StatusUnauthorized)
		return
	}

	token, err := tokens.TokenCreate(user.Id)
	if err != nil {
		http.Error(response, "internal server error", http.StatusInternalServerError)
		return
	}

	json, err := json2.Marshal(types.LoginReturn{Token: token, UserId: user.Id})
	if err != nil {
		http.Error(response, "internal server error", http.StatusInternalServerError)
		return
	}

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

func HandleUserNew(response http.ResponseWriter, request *http.Request) {
	if !postValidCheckWithResponseOnFail(&response, request, postNormal) {
		return
	}

	username := request.FormValue("username")
	if len(username) < 4 {
		http.Error(response, "no or short username", http.StatusBadRequest)
		return
	}

	password := request.FormValue("password")
	if len(password) < 8 {
		http.Error(response, "no or short passwords", http.StatusBadRequest)
		return
	}

	hashedPassword, err := passwords.PasswordHash(password)
	if err != nil {
		http.Error(response, "internal server error", http.StatusInternalServerError)
		return
	}

	newUser := &types.User{
		Name:         username,
		PasswordHash: hashedPassword,
		Color:        types.Rgba{}.GetRandom(),
		CreatedAt:    time.Now(),
	}

	ctx := request.Context()

	err = postgresql.UserSave(ctx, newUser)
	if err != nil {
		http.Error(response, "name taken", http.StatusUnauthorized)
		return
	}

	response.WriteHeader(http.StatusCreated)
}

func HandleUserDelete(response http.ResponseWriter, request *http.Request) {
	if !postValidCheckWithResponseOnFail(&response, request, postNormal) {
		return
	}
	ctx := request.Context()

	userId, err := tokens.TokenValidateGetId(request.FormValue("token"))
	if err != nil {
		http.Error(response, "invalid token", http.StatusUnauthorized)
		return
	}

	err = postgresql.UserDelete(ctx, userId)
	if err != nil {
		http.Error(response, "internal server error", http.StatusInternalServerError)
		return
	}

	cache.CacheDeleteUser(userId)
	response.WriteHeader(http.StatusAccepted)
}

func HandleUserModProfile(response http.ResponseWriter, request *http.Request) {
	if !postValidCheckWithResponseOnFail(&response, request, postNormal) {
		return
	}

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

	var updateList types.UserProfileUpdateList

	if pronouns := request.FormValue("pronouns"); pronouns != "" {
		if len(pronouns) > 32 {
			http.Error(response, "pronouns too long", http.StatusBadRequest)
			return
		}
		user.Pronouns = pronouns
		updateList.Pronouns = true
	}

	if description := request.FormValue("description"); description != "" {
		if len(description) > 256 {
			http.Error(response, "description too long", http.StatusBadRequest)
			return
		}
		user.Description = description
		updateList.Description = true
	}

	if colorStr := request.FormValue("color"); colorStr != "" {
		color, err := convertions.StringToRgba(colorStr)
		if err != nil {
			http.Error(response, "invalid color", http.StatusBadRequest)
			return
		}
		user.Color = color
		updateList.Color = true
	}

	err = postgresql.UserUpdateProfile(ctx, user, updateList)
	if err != nil {
		http.Error(response, "internal server error", http.StatusInternalServerError)
		return
	}
	response.WriteHeader(http.StatusAccepted)
}

func HandleUserModAvatar(response http.ResponseWriter, request *http.Request) {
	if !postValidCheckWithResponseOnFail(&response, request, postAvatar) {
		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(globals.MaxPostWithAvatar))

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

	if user.Avatar != "" {
		err = minio.Delete(ctx, user.Avatar)
		if err != nil {
			http.Error(response, "internal server error", http.StatusInternalServerError)
			return
		}
	}

	key := minio.GetKey(minio.GetKeyOptions{
		UserId:     user.Id,
		MimeType:   contentType,
		UploadType: minio.UserAvatar,
	})
	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
	}

	user.Avatar = key
	err = postgresql.UserUpdateProfile(ctx, user, types.UserProfileUpdateList{Avatar: true})
	if err != nil {
		http.Error(response, "internal server error", http.StatusInternalServerError)
		return
	}

	response.WriteHeader(http.StatusAccepted)
}

func HandleUserModProfileBg(response http.ResponseWriter, request *http.Request) {
	if !postValidCheckWithResponseOnFail(&response, request, postProfileBg) {
		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(globals.MaxPostWithProfileBg))

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

	if user.ProfileBg != "" {
		err = minio.Delete(ctx, user.ProfileBg)
		if err != nil {
			http.Error(response, "internal server error", http.StatusInternalServerError)
			return
		}
	}

	key := minio.GetKey(minio.GetKeyOptions{
		UserId:     user.Id,
		MimeType:   contentType,
		UploadType: minio.UserProfileBg,
	})
	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
	}

	user.ProfileBg = key
	err = postgresql.UserUpdateProfile(ctx, user, types.UserProfileUpdateList{ProfileBg: true})
	if err != nil {
		http.Error(response, "internal server error", http.StatusInternalServerError)
		return
	}

	response.WriteHeader(http.StatusAccepted)
}

func HandleUserGetUser(response http.ResponseWriter, request *http.Request) {
	if !postValidCheckWithResponseOnFail(&response, request, postNormal) {
		return
	}
	ctx := request.Context()

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

	targetId, err := convertions.ConvertStringUuid(request.FormValue("targetid"))
	if err != nil {
		http.Error(response, "invalid userid", http.StatusUnauthorized)
		return
	}
	target, err := getUserById(ctx, targetId)
	if err != nil {
		http.Error(response, "invalid userid", http.StatusUnauthorized)
		return
	}

	json, err := json2.Marshal(target)
	if err != nil {
		http.Error(response, "json parse error", http.StatusInternalServerError)
		return
	}

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