local config_file = ''
local config_dir = ''

local function find_config_file()
    if config_file ~= '' then
    	return config_file
    end

    -- TODO: find config file
    local scandir = require('plenary.scandir').scan_dir
    local Path = require('plenary.path')

    local current_dir = Path:new('.')
    while config_file == '' do
    	local files = scandir(current_dir.filename, { depth = 1 })
	for _, file in ipairs(files) do
	    if string.find(file, 'rclone.conf') then
		config_file = file
		config_dir = current_dir.filename
		break
	    end
	end

	current_dir = current_dir:parent()
    end

    return config_file
end

local function get_config()
    -- TODO: rclone config dump --config=find_config_file()
    local handle = io.popen('rclone config dump --config=' .. find_config_file(), 'r')
    local config = handle:read('*all');
    handle:close()

    return config
end

local function get_remote_config(remote)
    -- TODO: read json from get_config() and get default remote
    local config = vim.fn.json_decode(get_config())
    local target_remote = nil
    local target_config = nil

    if remote then
    	for remote_name, remote_config in pairs(config) do
    	    if remote_name == remote then
		target_remote = remote_name
		target_config = remote_config
    	    end
    	end
    else
        local config_length = 0
	for _, _ in pairs(config) do
	    config_length = config_length + 1
        end

	if config_length == 1 then
	    for remote_name, remote_config in pairs(config) do
		target_remote = remote_name
		target_config = remote_config
	    end
	else
	    for remote_name, remote_config in pairs(config) do
		if remote_config.vim_rclone_default then
		    target_remote = remote_name
		    target_config = remote_config
		end
	    end
	end
    end

    if target_remote == nil then
    	print("Couldn't find suitable remote")
    end

    return target_remote, target_config
end

local function copy()
    -- TODO: rclone copy $LOCAL_PATH $REMOTE:$REMOTE_PATH --config=find_config_file()
    local Path = require('plenary.path')
    local remote, config = get_remote_config()

    local local_path = Path:new(config.vim_rclone_local_path)
    local_path._cwd = config_dir -- set cwd to config dir to resolve path correctly

    print('rclone copy ' .. local_path:absolute() .. ' ' .. remote .. ':' .. config.vim_rclone_remote_path .. ' --config=' .. find_config_file())

    return config
end

return {
    copy = copy,
}