screen_actions_ui <- function(id) {
  ns <- NS(id)
  shiny::div(
    section_card(NULL,
      shiny::div(class = "row g-2 py-2",
        shiny::div(class = "col-6",
          shiny::dateInput(ns("date"), "Datum", value = Sys.Date(), language = "de", weekstart = 1)
        ),
        shiny::div(class = "col-6",
          shiny::textInput(ns("time"), "Uhrzeit",
            value = format(Sys.time(), "%H:%M"), placeholder = "HH:MM")
        )
      )
    ),
    section_card(NULL,
      shiny::div(class = "py-2",
        shiny::selectInput(ns("type"), "Maßnahme *",
          choices = c("Maßnahme wählen…" = "", COLONY_ACTION_TYPES)
        ),
        shiny::uiOutput(ns("extra_ui")),
        shiny::textAreaInput(ns("notes"), "Notizen", rows = 2, width = "100%")
      )
    ),
    shiny::div(class = "d-grid mt-2 mb-5",
      shiny::actionButton(ns("save"), "Maßnahme speichern", class = "btn btn-info btn-lg")
    )
  )
}

screen_actions_server <- function(id, db, nav) {
  moduleServer(id, function(input, output, session) {
    ns <- session$ns

    observeEvent(nav$screen, {
      if (nav$screen == "actions") {
        shiny::updateDateInput(session,     "date",  value = Sys.Date())
        shiny::updateTextInput(session,     "time",  value = format(Sys.time(), "%H:%M"))
        shiny::updateSelectInput(session,   "type",  selected = "")
        shiny::updateTextAreaInput(session, "notes", value = "")
      }
    }, ignoreInit = TRUE)

    output$extra_ui <- renderUI({
      type <- input$type
      if (is.null(type) || type == "") return(NULL)

      if (type %in% c("ablegerbildung", "zwischenbodenableger")) {
        all_cols <- db_colonies_list(db, include_closed = FALSE)
        co       <- db_colonies_get(db, nav$colony_id)
        placeholder <- if (nrow(co) > 0) paste0(co$name[1], " – Ableger") else "Name Ableger"
        shiny::tagList(
          shiny::textInput(ns("new_colony_name"), "Name neuer Ableger *", placeholder = placeholder),
          shiny::selectInput(ns("parent_colony"), "Muttervolk",
            choices  = setNames(all_cols$id, paste0(all_cols$name, " (", all_cols$apiary_name, ")")),
            selected = nav$colony_id
          )
        )

      } else if (type == "standwechsel") {
        ap <- db_apiaries_list(db)
        co <- db_colonies_get(db, nav$colony_id)
        shiny::selectInput(ns("new_apiary"), "Neuer Standort",
          choices  = setNames(ap$id, ap$name),
          selected = if (nrow(co) > 0) co$apiary_id[1] else NULL
        )

      } else if (type == "vereinigung") {
        all_cols   <- db_colonies_list(db, include_closed = FALSE)
        other_cols <- all_cols[all_cols$id != nav$colony_id, ]
        shiny::tagList(
          shiny::div(
            class = "alert alert-info py-2 small mb-2",
            shiny::icon("info-circle"), " ",
            "Das ", shiny::tags$strong("aktuelle Volk"), " ist das führende (behält die Königin). ",
            "Das ausgewählte Volk wird aufgelöst und als eingegangen markiert."
          ),
          shiny::selectInput(ns("absorbed_colony"), "Aufzulösendes Volk *",
            choices = c("Volk wählen…" = "",
              setNames(other_cols$id,
                paste0(other_cols$name, " (", other_cols$apiary_name, ")")))
          )
        )

      } else {
        NULL
      }
    })

    observeEvent(input$save, {
      req(nav$colony_id, nchar(trimws(input$type %||% "")) > 0)
      type <- input$type

      if (type %in% c("ablegerbildung", "zwischenbodenableger")) {
        req(!is.null(input$new_colony_name), nchar(trimws(input$new_colony_name)) > 0)
        parent_id <- if (!is.null(input$parent_colony) && input$parent_colony != "")
          as.integer(input$parent_colony) else nav$colony_id
        new_id <- db_colonies_insert(db,
          name             = trimws(input$new_colony_name),
          apiary_id        = db_colonies_get(db, parent_id)$apiary_id[1],
          status           = "ableger",
          parent_colony_id = parent_id
        )
        db_actions_insert(db,
          colony_id         = nav$colony_id,
          date              = input$date,
          time              = input$time %||% NA,
          type              = type,
          notes             = input$notes,
          related_colony_id = new_id
        )
        nav$colony_id <- new_id
        nav$screen <- "colony"
        return()
      }

      if (type == "vereinigung") {
        req(!is.null(input$absorbed_colony), input$absorbed_colony != "")
        absorbed_id <- as.integer(input$absorbed_colony)
        absorbed    <- db_colonies_get(db, absorbed_id)
        current     <- db_colonies_get(db, nav$colony_id)
        db_actions_insert(db,
          colony_id         = nav$colony_id,
          date              = input$date,
          time              = input$time %||% NA,
          type              = "vereinigung",
          notes             = paste0("Vereinigt mit: ", absorbed$name[1]),
          related_colony_id = absorbed_id
        )
        db_actions_insert(db,
          colony_id         = absorbed_id,
          date              = input$date,
          time              = input$time %||% NA,
          type              = "vereinigung",
          notes             = paste0("Aufgegangen in: ", current$name[1]),
          related_colony_id = nav$colony_id
        )
        db_colonies_close(db, absorbed_id)
        nav$screen <- "colony"
        return()
      }

      db_actions_insert(db,
        colony_id = nav$colony_id,
        date      = input$date,
        time      = input$time %||% NA,
        type      = type,
        notes     = input$notes
      )

      if (type == "standwechsel" && !is.null(input$new_apiary)) {
        co <- db_colonies_get(db, nav$colony_id)
        db_colonies_update(db,
          id        = nav$colony_id,
          name      = co$name[1],
          apiary_id = as.integer(input$new_apiary),
          status    = co$status[1],
          notes     = co$notes[1]
        )
      }

      nav$screen <- "colony"
    })
  })
}