-- Simulator Home Screen Logic

local apps = {}

-- Helper to get document (may not be available immediately)
local function getDoc()
    if document then
        return document
    end
    if rmlui and rmlui.contexts and rmlui.contexts.main then
        local ctx = rmlui.contexts.main
        if ctx.documents then
            for i, doc in ipairs(ctx.documents) do
                if doc then
                    return doc
                end
            end
        end
    end
    return nil
end

-- Populate the app grid with discovered apps
function populateAppGrid()
    local doc = getDoc()
    if not doc then
        print("[Simulator] Document not available for populateAppGrid")
        return
    end

    local grid = doc:GetElementById("app-grid")
    if not grid then
        print("[Simulator] app-grid element not found")
        return
    end

    -- Clear existing content
    grid.inner_rml = ""

    if #apps == 0 then
        grid.inner_rml = [[
            <div class="no-apps">
                <p>No apps found</p>
                <p class="hint">Place apps in test-apps/ folder</p>
            </div>
        ]]
        return
    end

    -- Build app icons
    local html = ""
    for i, app in ipairs(apps) do
        local icon_html
        if app.icon and app.icon ~= "" then
            icon_html = string.format('<img src="%s"/>', app.icon)
        else
            icon_html = '<span class="app-icon-placeholder">&#x25A0;</span>'
        end

        html = html .. string.format([[
            <div class="app-icon" onclick="launchApp('%s')">
                <div class="app-icon-image">%s</div>
                <span class="app-icon-label">%s</span>
            </div>
        ]], app.id, icon_html, app.name)
    end

    grid.inner_rml = html
    print("[Simulator] Populated " .. #apps .. " apps")
end

-- Get apps from C++ and populate the grid
function refreshApps()
    if simulator and simulator.getApps then
        apps = simulator.getApps()
        print("[Simulator] Got " .. #apps .. " apps from C++")
        populateAppGrid()
    else
        print("[Simulator] simulator.getApps not available")
    end
end

-- Called from C++ after apps are discovered (backup method)
function setApps(app_list)
    apps = app_list
    populateAppGrid()
end

-- Launch an app by ID
function launchApp(app_id)
    print("[Simulator] Launching app: " .. app_id)

    -- Find the app
    for _, app in ipairs(apps) do
        if app.id == app_id then
            -- Call C++ function to launch the app
            if simulator and simulator.launchApp then
                simulator.launchApp(app.entry, app.path, app.id)
            else
                print("[Simulator] Error: simulator.launchApp not available")
            end
            return
        end
    end

    print("[Simulator] App not found: " .. app_id)
end

-- Update the time display
function updateTime()
    local doc = getDoc()
    if not doc then return end

    local timeEl = doc:GetElementById("status-time")
    if timeEl then
        -- Use os.date if available, otherwise show static time
        local time_str = "12:00"
        if os and os.date then
            time_str = os.date("%H:%M")
        end
        timeEl.inner_rml = time_str
    end
end

-- Initialize
print("[Simulator] Home screen loaded")

-- Try immediate initialization first
local doc = getDoc()
if doc then
    print("[Simulator] Document available immediately")
    refreshApps()
    updateTime()
elseif setInterval then
    print("[Simulator] Document not ready, setting up timer")
    -- Use a one-time timer to refresh apps after document is ready
    local initTimerId = nil
    local attempts = 0
    initTimerId = setInterval(function()
        attempts = attempts + 1
        local d = getDoc()
        if d then
            print("[Simulator] Document ready after " .. attempts .. " attempts")
            clearInterval(initTimerId)
            refreshApps()
            updateTime()
        elseif attempts > 50 then
            -- Give up after 5 seconds
            print("[Simulator] Gave up waiting for document")
            clearInterval(initTimerId)
        end
    end, 100)

    -- Update time every minute
    setInterval(updateTime, 60000)
else
    print("[Simulator] No setInterval and no document - cannot init")
end