-- Info-Beamer script with streaming channel support
gl.setup(NATIVE_WIDTH, NATIVE_HEIGHT)

local json = require "json"
local font = resource.load_font "roboto.ttf"

local server_url = CONFIG.server_url or "http://192.168.1.22"
local player_id = CONFIG.player_id or "default_player"
local refresh_interval = CONFIG.refresh_interval or 30
local default_duration = CONFIG.default_duration or 10

local playlist = {}
local current_item = 1
local item_start_time = 0
local last_update = 0
local channel_info = {}

function update_playlist()
    -- Fetch channel content from server
    local url = server_url .. "/api/player/" .. player_id .. "/content"
    util.post_and_wait(url, "", function(response)
        if response.success then
            local data = json.decode(response.content)
            if data and data.content then
                playlist = data.content
                print("Updated channel content: " .. #playlist .. " items")
                
                -- Load assets
                for i, item in ipairs(playlist) do
                    if item.type == "image" then
                        item.resource = resource.load_image(server_url .. "/uploads/" .. item.filename)
                    elseif item.type == "video" then
                        item.resource = resource.load_video(server_url .. "/uploads/" .. item.filename)
                    end
                end
            end
        end
    end)
    
    -- Also fetch channel information
    local channel_url = server_url .. "/api/player/" .. player_id .. "/channel"
    util.post_and_wait(channel_url, "", function(response)
        if response.success then
            channel_info = json.decode(response.content) or {}
        end
    end)
    
    last_update = sys.now()
end

function node.render()
    -- Update playlist periodically
    if sys.now() - last_update > refresh_interval then
        update_playlist()
    end
    
    -- If no playlist items, show waiting message
    if #playlist == 0 then
        font:write(100, 100, "Waiting for channel content...", 50, 1, 1, 1, 1)
        font:write(100, 200, "Server: " .. server_url, 30, 0.7, 0.7, 0.7, 1)
        font:write(100, 250, "Player ID: " .. player_id, 30, 0.7, 0.7, 0.7, 1)
        return
    end
    
    local item = playlist[current_item]
    if not item then
        current_item = 1
        item = playlist[current_item]
        if not item then return end
    end
    
    local duration = item.duration or default_duration
    
    -- Check if it's time to move to next item
    if sys.now() - item_start_time > duration then
        current_item = current_item + 1
        if current_item > #playlist then
            current_item = 1
        end
        item_start_time = sys.now()
        item = playlist[current_item]
    end
    
    -- Display current item
    if item and item.resource then
        if item.type == "image" then
            item.resource:draw(0, 0, WIDTH, HEIGHT)
        elseif item.type == "video" then
            item.resource:draw(0, 0, WIDTH, HEIGHT)
        end
        
        -- Show channel info overlay (optional)
        if channel_info.name then
            font:write(10, HEIGHT - 60, "Channel: " .. channel_info.name, 20, 1, 1, 1, 0.8)
            if channel_info.description then
                font:write(10, HEIGHT - 30, channel_info.description, 20, 1, 1, 1, 0.8)
            end
        end
    end
    
    -- Show current time
    local current_time = os.date("%H:%M")
    font:write(WIDTH - 100, 20, current_time, 24, 1, 1, 1, 0.9)
end

-- Initial load
update_playlist()