using HYPRE.LibHYPRE

function generate_options(io, structname, prefix)
    println(io, "")
    println(io, "function Internals.set_options(s::$(structname), kwargs)")
    println(io, "    solver = s.solver")
    println(io, "    for (k, v) in kwargs")
    r = Regex("^" * prefix * "([A-Z].*)\$")
    ns = sort!(filter!(x -> occursin(r, string(x)), names(LibHYPRE)))
    first = true
    for n in ns
        m = get(methods(getfield(LibHYPRE, n)), 1, nothing)
        m === nothing && continue
        nargs = m.nargs - 1
        k = String(match(r, string(n))[1])
        print(io, "        $(first ? "" : "else")if k === :$(k)")
        println(io)
        if k == "Precond"
            println(io, "            Internals.set_precond(s, v)")
        elseif nargs == 1
            println(io, "            @check ", n, "(solver)")
        elseif nargs == 2
            println(io, "            @check ", n, "(solver, v)")
        else # nargs >= 3
            println(io, "            @check ", n, "(solver, v...)")
        end
        first = false
    end
    println(io, "        end")
    println(io, "    end")
    println(io, "end")
end

open(joinpath(@__DIR__, "..", "src", "solver_options.jl"), "w") do io
    println(io, "# SPDX-License-Identifier: MIT")
    println(io, "")
    println(io, "# This file is automatically generated by gen/solver_options.jl")
    println(io, "")
    println(io, "Internals.set_options(::HYPRESolver, kwargs) = nothing")

    generate_options(io, "BoomerAMG", "HYPRE_BoomerAMGSet")
    generate_options(io, "PCG", "HYPRE_PCGSet")
end