package handlers

import (
	"context"
	"database/sql"
	"errors"
	"git.katuwoss.dev/JustScreaMy/secret-santa/internal/queries"
	"net/http"
)

func HandleGetUsers(db *sql.DB) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		ctx := context.Background()
		query := queries.New(db)

		users, err := query.GetUsers(ctx)
		if err != nil {
			writeErrorResponse(w, http.StatusInternalServerError, err.Error())
			return
		}

		if len(users) == 0 {
			users = []queries.User{}
		}

		writeJSONResponse(w, http.StatusOK, users)
	}
}
func HandleGetUsersByID(db *sql.DB) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		ctx := context.Background()
		query := queries.New(db)

		id, err := parseIDFromURL(r)
		if err != nil {
			writeErrorResponse(w, http.StatusInternalServerError, err.Error())
			return
		}

		user, err := query.GetUserId(ctx, id)
		if err != nil {
			if errors.Is(err, sql.ErrNoRows) {
				writeErrorResponse(w, http.StatusNotFound, "User not found")
				return
			}
			writeErrorResponse(w, http.StatusInternalServerError, err.Error())
			return
		}
		writeJSONResponse(w, http.StatusOK, user)
	}
}

func HandleCreateUser(db *sql.DB) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		ctx := context.Background()
		query := queries.New(db)

		var createUser queries.CreateUserParams
		err := readJSONRequest(r, &createUser)
		if err != nil {
			writeErrorResponse(w, http.StatusInternalServerError, err.Error())
			return
		}

		user, err := query.CreateUser(ctx, createUser)
		if err != nil {
			writeErrorResponse(w, http.StatusInternalServerError, err.Error())
			return
		}
		writeJSONResponse(w, http.StatusCreated, user)
	}
}

func HandleDeleteUser(db *sql.DB) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		ctx := context.Background()
		query := queries.New(db)

		id, err := parseIDFromURL(r)
		if err != nil {
			writeErrorResponse(w, http.StatusInternalServerError, err.Error())
			return
		}

		err = query.DeleteUser(ctx, id)
		if err != nil {
			writeErrorResponse(w, http.StatusInternalServerError, err.Error())
			return
		}
		writeJSONResponse(w, http.StatusNoContent, nil)
	}
}