package handlers

import (
    "log"
    "net/http"
    "strconv"
    "threadr/models"
    "github.com/gorilla/sessions"
)

func BoardsHandler(app *App) http.HandlerFunc {
    return func(w http.ResponseWriter, r *http.Request) {
        session := r.Context().Value("session").(*sessions.Session)
        loggedIn := session.Values["user_id"] != nil
        cookie, _ := r.Cookie("threadr_cookie_banner")
        userID, _ := session.Values["user_id"].(int)
        isAdmin := false
        
        if loggedIn {
            user, err := models.GetUserByID(app.DB, userID)
            if err != nil {
                log.Printf("Error fetching user: %v", err)
            } else if user != nil {
                isAdmin = models.HasGlobalPermission(user, models.PermCreateBoard)
            }
        }

        if r.Method == http.MethodPost && loggedIn && isAdmin {
            name := r.FormValue("name")
            description := r.FormValue("description")
            if name == "" {
                http.Error(w, "Board name is required", http.StatusBadRequest)
                return
            }
            board := models.Board{
                Name:          name,
                Description:   description,
                Private:       false,
                PublicVisible: true,
            }
            query := "INSERT INTO boards (name, description, private, public_visible) VALUES (?, ?, ?, ?)"
            result, err := app.DB.Exec(query, board.Name, board.Description, board.Private, board.PublicVisible)
            if err != nil {
                log.Printf("Error creating board: %v", err)
                http.Error(w, "Failed to create board", http.StatusInternalServerError)
                return
            }
            boardID, _ := result.LastInsertId()
            http.Redirect(w, r, app.Config.ThreadrDir+"/board/?id="+strconv.FormatInt(boardID, 10), http.StatusFound)
            return
        }

        publicBoards, err := models.GetAllBoards(app.DB, false)
        if err != nil {
            log.Printf("Error fetching public boards: %v", err)
            http.Error(w, "Internal Server Error", http.StatusInternalServerError)
            return
        }
        var privateBoards []models.Board
        if loggedIn {
            privateBoards, err = models.GetAllBoards(app.DB, true)
            if err != nil {
                log.Printf("Error fetching private boards: %v", err)
                http.Error(w, "Internal Server Error", http.StatusInternalServerError)
                return
            }
            var accessiblePrivateBoards []models.Board
            for _, board := range privateBoards {
                hasPerm, err := models.HasBoardPermission(app.DB, userID, board.ID, models.PermViewBoard)
                if err != nil {
                    log.Printf("Error checking permission: %v", err)
                    continue
                }
                if hasPerm {
                    accessiblePrivateBoards = append(accessiblePrivateBoards, board)
                }
            }
            privateBoards = accessiblePrivateBoards
        }

        data := struct {
            PageData
            PublicBoards  []models.Board
            PrivateBoards []models.Board
            IsAdmin       bool
        }{
            PageData: PageData{
                Title:            "ThreadR - Boards",
                Navbar:           "boards",
                LoggedIn:         loggedIn,
                ShowCookieBanner: cookie == nil || cookie.Value != "accepted",
                BasePath:         app.Config.ThreadrDir,
                StaticPath:       app.Config.ThreadrDir + "/static",
                CurrentURL:       r.URL.Path,
            },
            PublicBoards:  publicBoards,
            PrivateBoards: privateBoards,
            IsAdmin:       isAdmin,
        }
        if err := app.Tmpl.ExecuteTemplate(w, "boards", data); err != nil {
            log.Printf("Error executing template in BoardsHandler: %v", err)
            http.Error(w, "Internal Server Error", http.StatusInternalServerError)
            return
        }
    }
}