-----------------------------------------------------------------------------------------
--
-- scene01.lua
-- Datenansicht Scene
--
-----------------------------------------------------------------------------------------

local composer = require("composer")
local json = require("json")

local scene = composer.newScene()

-- -----------------------------------------------------------------------------------
-- Scene event functions
-- -----------------------------------------------------------------------------------

-- create()
function scene:create(event)
    local sceneGroup = self.view
    -- Kein Hintergrund, keine UI-Elemente
end

-- show()
function scene:show(event)
    local sceneGroup = self.view
    local phase = event.phase
    
    if phase == "will" then
        -- Code hier wird ausgeführt, wenn die Scene noch off-screen ist (aber im Begriff ist, on-screen zu kommen)
        
    elseif phase == "did" then
        -- Code hier wird ausgeführt, wenn die Scene komplett on-screen ist
        
        -- Hole die übergebenen Daten
        local deviceDataSets = event.params.deviceDataSets
        local devices = event.params.devices
        
        if deviceDataSets and devices then
            -- Berechne Layout
            local itemHeight = 90
            local cardWidth = display.contentWidth - 60
            local totalHeight = #devices * itemHeight
            local startY = (display.contentHeight - totalHeight) / 2 + (itemHeight / 2)
            
            for i, device in ipairs(devices) do
                local yPos = startY + ((i - 1) * itemHeight)
                
                -- Container für jedes Device (zentral)
                local itemBg = display.newRoundedRect(sceneGroup, display.contentCenterX, yPos, cardWidth, itemHeight - 10, 8)
                itemBg:setFillColor(1, 1, 1)
                itemBg.strokeWidth = 2
                itemBg:setStrokeColor(0.85, 0.85, 0.85)
                
                -- Device Name (Titel)
                local nameText = display.newText({
                    parent = sceneGroup,
                    text = device.name,
                    x = display.contentCenterX,
                    y = yPos - 25,
                    fontSize = 18,
                    font = native.systemFontBold,
                    align = "center"
                })
                nameText:setFillColor(0.2, 0.2, 0.2)
                
                -- Daten extrahieren
                local dataSet = deviceDataSets[device.name]
                local valueText = "Keine Daten"
                local dateText = ""
                
                if dataSet and not dataSet.error then
                    if type(dataSet) == "table" and #dataSet > 0 then
                        local meterData = nil
                        for _, meter in ipairs(dataSet) do
                            if meter.deviceId == device.deviceId then
                                meterData = meter
                                break
                            end
                        end
                        
                        if meterData and meterData.values and #meterData.values > 0 then
                            local firstValue = meterData.values[1]
                            if firstValue.value then
                                valueText = string.format("%.2f kW", firstValue.value)
                            end
                            if firstValue.datetime then
                                dateText = firstValue.datetime
                            end
                        end
                    end
                elseif dataSet and dataSet.error then
                    valueText = "Fehler: " .. dataSet.error
                end
                
                -- Wert anzeigen
                local valueLabel = display.newText({
                    parent = sceneGroup,
                    text = valueText,
                    x = display.contentCenterX,
                    y = yPos,
                    fontSize = 16,
                    align = "center"
                })
                valueLabel:setFillColor(0.3, 0.6, 0.3)
                
                -- Datum anzeigen (falls vorhanden)
                if dateText ~= "" then
                    local formattedDate = dateText:match("(%d%d%d%d%-%d%d%-%d%d)")
                    if formattedDate then
                        local dateLabel = display.newText({
                            parent = sceneGroup,
                            text = "📅 " .. formattedDate,
                            x = display.contentCenterX,
                            y = yPos + 25,
                            fontSize = 12,
                            align = "center"
                        })
                        dateLabel:setFillColor(0.5, 0.5, 0.5)
                    end
                end
            end
            
            print("✓ Scene01 geladen mit zentral angeordneten Datenboxen")
        end
    end
end

-- hide()
function scene:hide(event)
    local sceneGroup = self.view
    local phase = event.phase
    
    if phase == "will" then
        -- Code hier wird ausgeführt, wenn die Scene on-screen ist (aber im Begriff ist, off-screen zu gehen)
        
    elseif phase == "did" then
        -- Code hier wird ausgeführt, unmittelbar nachdem die Scene off-screen gegangen ist
        -- ScrollView-Inhalt wird automatisch mit der Scene entfernt
    end
end

-- destroy()
function scene:destroy(event)
    local sceneGroup = self.view
    print("Scene01 zerstört")
end

-- -----------------------------------------------------------------------------------
-- Scene event function listeners
-- -----------------------------------------------------------------------------------
scene:addEventListener("create", scene)
scene:addEventListener("show", scene)
scene:addEventListener("hide", scene)
scene:addEventListener("destroy", scene)
-- -----------------------------------------------------------------------------------

return scene