--[[
    ╔══════════════════════════════════════════════════════════╗
    ║         WEBDISPLAY - CLIENT | Metropoles City RP         ║
    ╚══════════════════════════════════════════════════════════╝
]]

local screenStates = {}

local function dbg(msg)
    if Config and Config.debug then
        outputDebugString("[WebDisplay] " .. tostring(msg), 3)
    end
end

-- ============================================================
-- RENDER LOOP
-- ============================================================
local function onRender()
    if not localPlayer then return end

    local px, py, pz       = getElementPosition(localPlayer)
    local camX, camY, camZ = getCameraMatrix()

    for id, state in pairs(screenStates) do
        if state.ready and state.browser and isElement(state.browser) then
            local scr  = state.screenConfig
            local dist = getDistanceBetweenPoints3D(
                px, py, pz,
                scr.position.x, scr.position.y, scr.position.z
            )

            -- Volume baseado na distancia
            local maxAudio = scr.audioDistance or 30
            setBrowserVolume(state.browser, 1 - math.min(dist / maxAudio, 1))

            if dist <= scr.renderDistance then
                local mx   = scr.position.x
                local my   = scr.position.y
                local topZ = scr.position.z + (scr.size.height / 2)
                local botZ = scr.position.z - (scr.size.height / 2)

                dxDrawMaterialLine3D(
                    mx, my, topZ,
                    mx, my, botZ,
                    state.browser,
                    scr.size.width,
                    tocolor(255, 255, 255, 255),
                    camX, camY, camZ
                )
            end
        end
    end
end

-- ============================================================
-- CRIA BROWSER
-- ============================================================
local function createScreenBrowser(scr)
    local scrId   = scr.id
    local scrName = tostring(scr.name or scr.id)
    local scrUrl  = scr.url

    if not scrUrl or scrUrl == "" then
        dbg("ERRO: [" .. scrName .. "] sem URL definida.")
        return
    end

    dbg("Criando browser [" .. scrName .. "] -> " .. scrUrl)

    local bW = Config.browser.width
    local bH = Config.browser.height

    -- false, false = browser local (nao remoto)
    -- funciona para URLs que estao na whitelist do cliente
    local browser = createBrowser(bW, bH, false, false)

    if not browser then
        dbg("ERRO: createBrowser retornou nil para [" .. scrName .. "]")
        return
    end

    screenStates[scrId] = {
        browser      = browser,
        ready        = false,
        screenConfig = scr,
    }

    addEventHandler("onClientBrowserCreated", browser, function()
        dbg("[" .. scrName .. "] browser criado, carregando URL...")
        loadBrowserURL(browser, scrUrl)
    end)

    addEventHandler("onClientBrowserDocumentReady", browser, function(url)
        dbg("[" .. scrName .. "] pagina pronta: " .. tostring(url))
        if not isElement(browser) then return end
        setBrowserVolume(browser, 0)
        if screenStates[scrId] then
            screenStates[scrId].ready = true
        end
    end)

    addEventHandler("onClientBrowserLoadingFailed", browser, function(url, code, desc)
        dbg("[" .. scrName .. "] FALHA ao carregar | " .. tostring(code) .. " | " .. tostring(desc))
        if screenStates[scrId] then
            screenStates[scrId].ready = false
        end
    end)
end

-- ============================================================
-- LIMPEZA
-- ============================================================
local function cleanup()
    dbg("Limpando...")
    removeEventHandler("onClientRender", root, onRender)
    for id, state in pairs(screenStates) do
        if state.browser and isElement(state.browser) then
            destroyElement(state.browser)
            dbg("Browser [" .. tostring(id) .. "] destruido.")
        end
    end
    screenStates = {}
end

-- ============================================================
-- START / STOP
-- ============================================================
addEventHandler("onClientResourceStart", resourceRoot, function()
    if not Config then
        outputDebugString("[WebDisplay] ERRO CRITICO: Config nil!", 1)
        return
    end

    if not Config.screens or #Config.screens == 0 then
        dbg("AVISO: Config.screens vazio.")
        return
    end

    dbg("Iniciando " .. #Config.screens .. " telao(es)...")

    for _, scr in ipairs(Config.screens) do
        if scr.enabled then
            createScreenBrowser(scr)
        else
            dbg("Tela [" .. tostring(scr.name) .. "] desativada.")
        end
    end

    addEventHandler("onClientRender", root, onRender)
    dbg("Render loop ativo.")
end)

addEventHandler("onClientResourceStop", resourceRoot, cleanup)

-- ============================================================
-- COMANDOS (apenas admin)
-- ============================================================
addCommandHandler("webdisplay", function(_, action, id, ...)
    if action == "reload" then
        cleanup()
        screenStates = {}
        for _, scr in ipairs(Config.screens) do
            if scr.enabled then createScreenBrowser(scr) end
        end
        addEventHandler("onClientRender", root, onRender)
        outputChatBox("[WebDisplay] Recarregado!", 100, 255, 100)

    elseif action == "url" and id then
        local newUrl = table.concat({...}, " ")
        local state  = screenStates[id]
        if state and state.browser and isElement(state.browser) then
            state.ready = false
            loadBrowserURL(state.browser, newUrl)
            outputChatBox("[WebDisplay] URL de [" .. id .. "] atualizada.", 100, 200, 255)
        else
            outputChatBox("[WebDisplay] Telao [" .. id .. "] nao encontrado.", 255, 100, 100)
        end
    end
end)