module os

import dl

type ShellExecuteWin = fn (voidptr, &u16, &u16, &u16, &u16, int)

// open_uri opens a given uri.
pub fn open_uri(uri string) ! {
    mut vopen_uri_cmd := getenv('VOPEN_URI_CMD')
    if vopen_uri_cmd != '' {
        result := execute('${vopen_uri_cmd} "${uri}"')
        if result.exit_code != 0 {
            return error('unable to open url: ${result.output}')
        }
        return
    }
    handle := dl.open_opt('shell32', dl.rtld_now)!
    // https://docs.microsoft.com/en-us/windows/win32/api/shellapi/nf-shellapi-shellexecutew
    func := ShellExecuteWin(dl.sym_opt(handle, 'ShellExecuteW')!)
    // 1 is SW_SHOWNORMAL, but it avoids including winuser.h, and in turn windows.h, which conflicts with raylib
    func(C.NULL, 'open'.to_wide(), uri.to_wide(), C.NULL, C.NULL, 1)
    dl.close(handle)
}