local QBCore = exports['qb-core']:GetCoreObject()
local playerLicenses = {}
local nearbyPlayers = {}

-- Keybind registrieren
RegisterKeyMapping(Config.Command, 'Lizenz-Menü öffnen', 'keyboard', Config.OpenKey)

-- Events
RegisterNetEvent('license-system:client:openMenu', function()
    TriggerServerEvent('license-system:server:getLicenses')
end)

RegisterNetEvent('license-system:client:receiveLicenses', function(licenses)
    playerLicenses = licenses
    openMainMenu()
end)

RegisterNetEvent('license-system:client:receiveNearbyPlayers', function(players)
    nearbyPlayers = {}
    local playerPed = PlayerPedId()
    local playerCoords = GetEntityCoords(playerPed)
    
    for _, playerId in ipairs(players) do
        if playerId ~= GetPlayerServerId(PlayerId()) then
            local targetPed = GetPlayerPed(GetPlayerFromServerId(playerId))
            if targetPed and targetPed ~= 0 then
                local targetCoords = GetEntityCoords(targetPed)
                local distance = #(playerCoords - targetCoords)
                
                if distance <= 5.0 then
                    local targetPlayer = QBCore.Functions.GetPlayerData(playerId)
                    table.insert(nearbyPlayers, {
                        id = playerId,
                        name = targetPlayer and (targetPlayer.charinfo.firstname .. ' ' .. targetPlayer.charinfo.lastname) or 'Unbekannt'
                    })
                end
            end
        end
    end
end)

RegisterNetEvent('license-system:client:viewLicense', function(licenseData, issuerName)
    showLicenseOverlay(licenseData, issuerName)
end)

-- Hauptmenü
function openMainMenu()
    local options = {
        {
            title = 'Meine Lizenzen anzeigen',
            description = 'Zeige alle deine Lizenzen an',
            icon = 'fas fa-eye',
            onSelect = function()
                showMyLicenses()
            end
        },
        {
            title = 'Lizenz zeigen',
            description = 'Zeige jemandem in der Nähe eine Lizenz',
            icon = 'fas fa-share',
            onSelect = function()
                showLicenseToPlayer()
            end
        }
    }

    -- Admin-Optionen hinzufügen
    local PlayerData = QBCore.Functions.GetPlayerData()
    if PlayerData.job and Config.AuthorizedJobs[PlayerData.job.name] then
        table.insert(options, {
            title = 'Lizenz ausstellen',
            description = 'Stelle eine neue Lizenz aus',
            icon = 'fas fa-plus',
            onSelect = function()
                issueLicenseMenu()
            end
        })
        
        table.insert(options, {
            title = 'Lizenz verwalten',
            description = 'Entziehe oder stelle Lizenzen wieder her',
            icon = 'fas fa-cog',
            onSelect = function()
                manageLicensesMenu()
            end
        })
    end

    lib.registerContext({
        id = 'license_main_menu',
        title = 'Lizenz-System',
        options = options
    })

    lib.showContext('license_main_menu')
end

-- Meine Lizenzen anzeigen
function showMyLicenses()
    local options = {}
    
    for _, license in ipairs(playerLicenses) do
        local licenseConfig = Config.Licenses[license.license_type]
        if licenseConfig then
            local statusText = license.is_active and "✅ Aktiv" or "❌ Entzogen"
            table.insert(options, {
                title = licenseConfig.label,
                description = 'Status: ' .. statusText .. ' | Ausgestellt: ' .. license.issue_date,
                icon = licenseConfig.icon,
                onSelect = function()
                    showLicenseOverlay(license)
                end
            })
        end
    end

    if #options == 0 then
        options = {{
            title = 'Keine Lizenzen vorhanden',
            description = 'Du besitzt derzeit keine Lizenzen',
            icon = 'fas fa-exclamation-triangle'
        }}
    end

    lib.registerContext({
        id = 'my_licenses_menu',
        title = 'Meine Lizenzen',
        menu = 'license_main_menu',
        options = options
    })

    lib.showContext('my_licenses_menu')
end

-- Lizenz jemandem zeigen
function showLicenseToPlayer()
    TriggerServerEvent('license-system:server:getNearbyPlayers')
    
    Wait(500) -- Kurz warten für die Antwort
    
    if #nearbyPlayers == 0 then
        lib.notify({
            title = 'Lizenz-System',
            description = 'Keine Spieler in der Nähe gefunden',
            type = 'error'
        })
        return
    end

    local licenseOptions = {}
    for _, license in ipairs(playerLicenses) do
        if license.is_active then
            local licenseConfig = Config.Licenses[license.license_type]
            if licenseConfig then
                table.insert(licenseOptions, {
                    title = licenseConfig.label,
                    description = 'Ausgestellt: ' .. license.issue_date,
                    icon = licenseConfig.icon,
                    onSelect = function()
                        selectPlayerToShow(license)
                    end
                })
            end
        end
    end

    if #licenseOptions == 0 then
        lib.notify({
            title = 'Lizenz-System',
            description = 'Du hast keine aktiven Lizenzen zum Zeigen',
            type = 'error'
        })
        return
    end

    lib.registerContext({
        id = 'select_license_to_show',
        title = 'Lizenz auswählen',
        menu = 'license_main_menu',
        options = licenseOptions
    })

    lib.showContext('select_license_to_show')
end

function selectPlayerToShow(license)
    local playerOptions = {}
    
    for _, player in ipairs(nearbyPlayers) do
        table.insert(playerOptions, {
            title = player.name,
            description = 'Zeige diesem Spieler deine Lizenz',
            icon = 'fas fa-user',
            onSelect = function()
                TriggerServerEvent('license-system:server:showLicense', player.id, license)
                lib.notify({
                    title = 'Lizenz-System',
                    description = 'Lizenz wurde ' .. player.name .. ' gezeigt',
                    type = 'success'
                })
            end
        })
    end

    lib.registerContext({
        id = 'select_player_to_show',
        title = 'Spieler auswählen',
        menu = 'select_license_to_show',
        options = playerOptions
    })

    lib.showContext('select_player_to_show')
end

-- Lizenz ausstellen
function issueLicenseMenu()
    local PlayerData = QBCore.Functions.GetPlayerData()
    local authorizedLicenses = Config.AuthorizedJobs[PlayerData.job.name].canIssue
    
    local options = {}
    for _, licenseType in ipairs(authorizedLicenses) do
        local licenseConfig = Config.Licenses[licenseType]
        if licenseConfig then
            table.insert(options, {
                title = licenseConfig.label,
                description = 'Stelle einen ' .. licenseConfig.label .. ' aus',
                icon = licenseConfig.icon,
                onSelect = function()
                    selectPlayerForLicense(licenseType)
                end
            })
        end
    end

    lib.registerContext({
        id = 'issue_license_menu',
        title = 'Lizenz ausstellen',
        menu = 'license_main_menu',
        options = options
    })

    lib.showContext('issue_license_menu')
end

function selectPlayerForLicense(licenseType)
    TriggerServerEvent('license-system:server:getNearbyPlayers')
    
    Wait(500)
    
    if #nearbyPlayers == 0 then
        lib.notify({
            title = 'Lizenz-System',
            description = 'Keine Spieler in der Nähe gefunden',
            type = 'error'
        })
        return
    end

    local playerOptions = {}
    for _, player in ipairs(nearbyPlayers) do
        table.insert(playerOptions, {
            title = player.name,
            description = 'Stelle diesem Spieler eine Lizenz aus',
            icon = 'fas fa-user',
            onSelect = function()
                openLicenseForm(player.id, licenseType)
            end
        })
    end

    lib.registerContext({
        id = 'select_player_for_license',
        title = 'Spieler auswählen',
        menu = 'issue_license_menu',
        options = playerOptions
    })

    lib.showContext('select_player_for_license')
end

function openLicenseForm(targetId, licenseType)
    local licenseConfig = Config.Licenses[licenseType]
    local input = {}

    if licenseConfig.fields.name then
        table.insert(input, {
            type = 'input',
            isRequired = true,
            label = 'Name',
            placeholder = 'Vor- und Nachname'
        })
    end

    if licenseConfig.fields.birthday then
        table.insert(input, {
            type = 'date',
            isRequired = true,
            label = 'Geburtsdatum'
        })
    end

    if licenseConfig.fields.gender then
        table.insert(input, {
            type = 'select',
            label = 'Geschlecht',
            options = Config.Genders
        })
    end

    if licenseConfig.fields.issue_date then
        table.insert(input, {
            type = 'date',
            isRequired = true,
            label = 'Ausstellungsdatum',
            default = os.date('%Y-%m-%d')
        })
    end

    if licenseConfig.fields.expire_date then
        table.insert(input, {
            type = 'date',
            isRequired = true,
            label = 'Ablaufdatum'
        })
    end

    if licenseConfig.fields.classes then
        local classOptions = {}
        for _, class in ipairs(Config.LicenseClasses) do
            table.insert(classOptions, {
                value = class,
                label = 'Klasse ' .. class
            })
        end
        
        table.insert(input, {
            type = 'multi-select',
            label = 'Führerscheinklassen',
            options = classOptions
        })
    end

    local dialog = lib.inputDialog('Lizenz ausstellen - ' .. licenseConfig.label, input)
    
    if dialog then
        local licenseData = {
            name = dialog[1],
            birthday = dialog[2],
            gender = dialog[3],
            issue_date = dialog[4] or os.date('%Y-%m-%d'),
            expire_date = dialog[5],
            classes = dialog[6]
        }
        
        TriggerServerEvent('license-system:server:issueLicense', targetId, licenseType, licenseData)
    end
end

-- Lizenz-Overlay anzeigen
function showLicenseOverlay(licenseData, issuerName)
    local licenseConfig = Config.Licenses[licenseData.license_type]
    if not licenseConfig then return end

    -- NUI öffnen
    SetNuiFocus(true, true)
    SendNUIMessage({
        action = 'showLicense',
        data = {
            license = licenseData,
            config = licenseConfig,
            issuer = issuerName
        }
    })
end

-- NUI Callbacks
RegisterNUICallback('closeLicense', function(data, cb)
    SetNuiFocus(false, false)
    cb('ok')
end)

-- Lizenz verwalten (für autorisierte Jobs)
function manageLicensesMenu()
    -- Hier würde die Verwaltung für das Entziehen/Wiederherstellen von Lizenzen implementiert
    -- Ähnlich wie die anderen Menüs, aber mit Suchfunktion nach Spielern
    lib.notify({
        title = 'Lizenz-System',
        description = 'Lizenz-Verwaltung wird implementiert...',
        type = 'info'
    })
end