local system = require('java-core.utils.system')

local Wget = require('pkgm.downloaders.wget')

local PowerShell = require('pkgm.downloaders.powershell')

local log = require('java-core.utils.log2')

local err_util = require('java-core.utils.errors')

local M = {}

---Get appropriate downloader based on platform and binary availability

---@param opts table Downloader options (url, dest, retry_count, timeout)

---@return table # Downloader instance

function M.get_downloader(opts)

local os = system.get_os()

log.debug('Getting downloader for OS:', os)

-- On Windows, prefer PowerShell

if os == 'win' then

if vim.fn.executable('pwsh') == 1 or vim.fn.executable('powershell') == 1 then

log.debug('Using PowerShell downloader')

return PowerShell(opts)

end

end

-- Check for wget on all platforms

if vim.fn.executable('wget') == 1 then

log.debug('Using wget downloader')

return Wget(opts)

end

-- On Windows, fallback to PowerShell if available

if os == 'win' and (vim.fn.executable('pwsh') == 1 or vim.fn.executable('powershell') == 1) then

log.debug('Using PowerShell downloader (fallback)')

return PowerShell(opts)

end

local err = 'No downloader available (wget or powershell not found)'

err_util.throw(err)

end

return M