-- Doggy OS Full System Recovery with Enhanced UI (Including a Loading Bar)

local function clearScreen(message)
    term.clear()
    term.setCursorPos(1, 1)
    if message then
        print(message)
    end
end

local function waitForDisk(diskPath, message)
    clearScreen(message)
    while not fs.exists(diskPath) do
        sleep(1)
    end
end

local function promptForEnter(message)
    print(message .. " Press Enter to continue...")
    io.read()  -- Wait for user to press Enter
end

local function askToOverride(filePath)
    clearScreen("File " .. filePath .. " already exists.\nDo you want to override it?\n1. Yes\n2. No (Skip)")
    local choice = tonumber(io.read())
    if choice == 1 then
        return true  -- User wants to override
    else
        return false  -- User wants to skip
    end
end

local function performAction(action, successMessage, failureMessage)
    clearScreen()
    local success, err = pcall(action)
    if success then
        print(successMessage)
    else
        print(failureMessage or "An error occurred: " .. err)
        promptForEnter("Error detected.")
    end
    sleep(2)
end

-- Define showLoadingScreen function here
local function showLoadingScreen(message, totalSteps)
    local barLength = 30  -- Length of the loading bar
    clearScreen(message)
    for step = 1, totalSteps do
        term.setCursorPos(1, 3)
        write("[")
        for i = 1, barLength do
            if i <= math.floor((step / totalSteps) * barLength) then
                write("=")  -- Progress part of the bar
            else
                write(" ")  -- Empty part of the bar
            end
        end
        write("] " .. math.floor((step / totalSteps) * 100) .. "%")
        sleep(0.3)  -- Slow down the animation for better visual effect
    end
end

local function fullSystemRecovery()
    performAction(
        function()
            -- Check for missing or corrupted files in /recovery and copy over from /recovery to /disk
            local function checkAndCopyMissingFiles()
                local function copyFileIfMissing(sourcePath, targetPath)
                    -- Only copy the file if it doesn't already exist
                    if not fs.exists(targetPath) then
                        print("Copying missing file: " .. sourcePath)
                        fs.copy(sourcePath, targetPath)
                    else
                        print("File already exists, skipping: " .. targetPath)
                    end
                end

                -- Compare files between /recovery and /disk (except /disk/users/)
                local function checkDirectory(sourceDir, targetDir, excludeDir)
                    local files = fs.list(sourceDir)
                    for _, file in ipairs(files) do
                        local sourcePath = fs.combine(sourceDir, file)
                        local targetPath = fs.combine(targetDir, file)

                        if fs.isDir(sourcePath) then
                            -- Recursively check directories (except /disk/users/)
                            if not sourcePath:match(excludeDir) then
                                checkDirectory(sourcePath, targetPath, excludeDir)
                            end
                        else
                            -- Check and copy missing file
                            copyFileIfMissing(sourcePath, targetPath)
                        end
                    end
                end

                -- Start checking and copying files
                checkDirectory("/recovery", "/disk", "/disk/users")
            end

            -- Perform the recovery process
            checkAndCopyMissingFiles()
        end,


    -- Start loading bar after copying files
    showLoadingScreen("Doggy OS System Recovery...", 50)  -- 50 steps of progress

    -- Once loading is done, show final message
    clearScreen("Recovery process completed.\nThe system is now restored.")
    promptForEnter("Press Enter to exit")
end

local function wipeDataAndResetFactoryDefaults()
    performAction(
        function()
            clearScreen("Wiping data and resetting to factory defaults...\nThis may take a while...")

            -- Delete everything in /disk/ (except for /disk/users/)
            if fs.exists("/disk") then
                local function deleteDirContent(path, exclude)
                    local files = fs.list(path)
                    for _, file in ipairs(files) do
                        local fullPath = fs.combine(path, file)

                        if fs.isDir(fullPath) then
                            if exclude and fullPath:sub(1, #exclude) == exclude then
                                -- Skip /disk/users/
                                print("Skipping: " .. fullPath)
                            else
                                -- Recursively delete directories
                                deleteDirContent(fullPath, exclude)
                            end
                        else
                            fs.delete(fullPath)
                        end
                    end
                end
                deleteDirContent("/disk", "/disk/users")
            end

            -- Copy files from /.doggyfactorydefaults/ to /disk/
            if fs.exists("/.doggyfactorydefaults") then
                local function copyDirContent(source, destination)
                    local files = fs.list(source)
                    for _, file in ipairs(files) do
                        local sourcePath = fs.combine(source, file)
                        local destinationPath = fs.combine(destination, file)

                        -- Debugging information
                        print("Copying: " .. sourcePath .. " -> " .. destinationPath)

                        if fs.isDir(sourcePath) then
                            -- Create the directory if it doesn't exist
                            if not fs.exists(destinationPath) then
                                fs.makeDir(destinationPath)
                            end
                            -- Recursively copy directories
                            copyDirContent(sourcePath, destinationPath)
                        else
                            fs.copy(sourcePath, destinationPath)
                        end
                    end
                end
                copyDirContent("/.doggyfactorydefaults", "/disk")
            else
                error("Error: /.doggyfactorydefaults not found.")
            end

            -- Simulate a more engaging loading process
            showLoadingScreen("Doggy OS Factory Reset...", 50)  -- 50 steps of progress

            -- Transition animation before setup
            clearScreen("Preparing for system setup...\nPlease wait...")
            local frames = {"|", "/", "-", "\\"}
            local frameIndex = 1
            for i = 1, 10 do  -- Display a spinning animation for 10 iterations
                term.setCursorPos(1, 3)
                write("Preparing for setup... " .. frames[frameIndex])
                sleep(0.3)
                frameIndex = (frameIndex % #frames) + 1  -- Cycle through the frames
            end

            -- Show completion message and return to menu
            shell.run("/disk/setup")
        end,
        "Wipe data and reset to factory defaults completed."
    )
end

local function recoveryMenu()
    while true do
        clearScreen("===== Recovery Options =====\n1. Full System Recovery\n2. Wipe data / Reset to factory defaults\n3. Back")
        local choice = tonumber(io.read())
        if choice == 1 then
            fullSystemRecovery()
        elseif choice == 2 then
            wipeDataAndResetFactoryDefaults()
        elseif choice == 3 then
            break
        else
            clearScreen("Invalid choice. Please try again.")
            sleep(2)
        end
    end
end

local function powerMenu()
    clearScreen("===== Power Options =====\n1. Reboot system\n2. Shutdown system")
    local choice = tonumber(io.read())
    if choice == 1 then
        os.reboot()
    elseif choice == 2 then
        os.shutdown()
    else
        clearScreen("Invalid choice. Please try again.")
        sleep(2)
    end
end

local function mainMenu()
    while true do
        clearScreen("===== Doggy OS DEV Recovery GUI =====\n1. Recovery Options\n2. Power Options\n3. Exit")
        local choice = tonumber(io.read())
        if choice == 1 then
            recoveryMenu()
        elseif choice == 2 then
            powerMenu()
        elseif choice == 3 then
            break
        else
            clearScreen("Invalid choice. Please try again.")
            sleep(2)
        end
    end
end

-- Start the main menu
mainMenu()