oaspec

-module(oaspec@codegen@middleware).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/oaspec/codegen/middleware.gleam").
-export([generate/1]).

-if(?OTP_RELEASE >= 27).
-define(MODULEDOC(Str), -moduledoc(Str)).
-define(DOC(Str), -doc(Str)).
-else.
-define(MODULEDOC(Str), -compile([])).
-define(DOC(Str), -compile([])).
-endif.

-file("src/oaspec/codegen/middleware.gleam", 17).
?DOC(" Generate the middleware types and utilities.\n").
-spec generate_middleware(oaspec@codegen@context:context()) -> binary().
generate_middleware(Ctx) ->
    Sb = begin
        _pipe = oaspec@util@string_extra:file_header(<<"0.12.0"/utf8>>),
        oaspec@util@string_extra:imports(_pipe, [])
    end,
    Sb@1 = begin
        _pipe@1 = Sb,
        _pipe@2 = oaspec@util@string_extra:doc_comment(
            _pipe@1,
            <<"A handler is a function that takes a request and returns a result."/utf8>>
        ),
        _pipe@3 = oaspec@util@string_extra:line(
            _pipe@2,
            <<"pub type Handler(req, res) ="/utf8>>
        ),
        _pipe@4 = oaspec@util@string_extra:indent(
            _pipe@3,
            1,
            <<"fn(req) -> Result(res, MiddlewareError)"/utf8>>
        ),
        oaspec@util@string_extra:blank_line(_pipe@4)
    end,
    Sb@2 = begin
        _pipe@5 = Sb@1,
        _pipe@6 = oaspec@util@string_extra:doc_comment(
            _pipe@5,
            <<"A middleware wraps a handler to add cross-cutting concerns."/utf8>>
        ),
        _pipe@7 = oaspec@util@string_extra:doc_comment(
            _pipe@6,
            <<"Middleware is composable: each middleware takes a handler and returns"/utf8>>
        ),
        _pipe@8 = oaspec@util@string_extra:doc_comment(
            _pipe@7,
            <<"a new handler with added behavior."/utf8>>
        ),
        _pipe@9 = oaspec@util@string_extra:line(
            _pipe@8,
            <<"pub type Middleware(req, res) ="/utf8>>
        ),
        _pipe@10 = oaspec@util@string_extra:indent(
            _pipe@9,
            1,
            <<"fn(Handler(req, res)) -> Handler(req, res)"/utf8>>
        ),
        oaspec@util@string_extra:blank_line(_pipe@10)
    end,
    Sb@3 = begin
        _pipe@11 = Sb@2,
        _pipe@12 = oaspec@util@string_extra:doc_comment(
            _pipe@11,
            <<"Errors that middleware can produce."/utf8>>
        ),
        _pipe@13 = oaspec@util@string_extra:line(
            _pipe@12,
            <<"pub type MiddlewareError {"/utf8>>
        ),
        _pipe@14 = oaspec@util@string_extra:indent(
            _pipe@13,
            1,
            <<"Unauthorized(detail: String)"/utf8>>
        ),
        _pipe@15 = oaspec@util@string_extra:indent(
            _pipe@14,
            1,
            <<"Forbidden(detail: String)"/utf8>>
        ),
        _pipe@16 = oaspec@util@string_extra:indent(
            _pipe@15,
            1,
            <<"BadRequest(detail: String)"/utf8>>
        ),
        _pipe@17 = oaspec@util@string_extra:indent(
            _pipe@16,
            1,
            <<"InternalError(detail: String)"/utf8>>
        ),
        _pipe@18 = oaspec@util@string_extra:indent(
            _pipe@17,
            1,
            <<"CustomError(code: Int, detail: String)"/utf8>>
        ),
        _pipe@19 = oaspec@util@string_extra:line(_pipe@18, <<"}"/utf8>>),
        oaspec@util@string_extra:blank_line(_pipe@19)
    end,
    Sb@4 = begin
        _pipe@20 = Sb@3,
        _pipe@21 = oaspec@util@string_extra:doc_comment(
            _pipe@20,
            <<"Identity middleware that passes the request through unchanged."/utf8>>
        ),
        _pipe@22 = oaspec@util@string_extra:line(
            _pipe@21,
            <<"pub fn identity() -> Middleware(req, res) {"/utf8>>
        ),
        _pipe@23 = oaspec@util@string_extra:indent(
            _pipe@22,
            1,
            <<"fn(handler: Handler(req, res)) -> Handler(req, res) {"/utf8>>
        ),
        _pipe@24 = oaspec@util@string_extra:indent(
            _pipe@23,
            2,
            <<"handler"/utf8>>
        ),
        _pipe@25 = oaspec@util@string_extra:indent(_pipe@24, 1, <<"}"/utf8>>),
        _pipe@26 = oaspec@util@string_extra:line(_pipe@25, <<"}"/utf8>>),
        oaspec@util@string_extra:blank_line(_pipe@26)
    end,
    Sb@5 = begin
        _pipe@27 = Sb@4,
        _pipe@28 = oaspec@util@string_extra:doc_comment(
            _pipe@27,
            <<"Compose two middleware functions."/utf8>>
        ),
        _pipe@29 = oaspec@util@string_extra:doc_comment(
            _pipe@28,
            <<"The first middleware is applied first (outermost),"/utf8>>
        ),
        _pipe@30 = oaspec@util@string_extra:doc_comment(
            _pipe@29,
            <<"the second middleware is applied second (innermost)."/utf8>>
        ),
        _pipe@31 = oaspec@util@string_extra:line(
            _pipe@30,
            <<"pub fn compose("/utf8>>
        ),
        _pipe@32 = oaspec@util@string_extra:indent(
            _pipe@31,
            1,
            <<"first: Middleware(req, res),"/utf8>>
        ),
        _pipe@33 = oaspec@util@string_extra:indent(
            _pipe@32,
            1,
            <<"second: Middleware(req, res),"/utf8>>
        ),
        _pipe@34 = oaspec@util@string_extra:line(
            _pipe@33,
            <<") -> Middleware(req, res) {"/utf8>>
        ),
        _pipe@35 = oaspec@util@string_extra:indent(
            _pipe@34,
            1,
            <<"fn(handler: Handler(req, res)) -> Handler(req, res) {"/utf8>>
        ),
        _pipe@36 = oaspec@util@string_extra:indent(
            _pipe@35,
            2,
            <<"first(second(handler))"/utf8>>
        ),
        _pipe@37 = oaspec@util@string_extra:indent(_pipe@36, 1, <<"}"/utf8>>),
        _pipe@38 = oaspec@util@string_extra:line(_pipe@37, <<"}"/utf8>>),
        oaspec@util@string_extra:blank_line(_pipe@38)
    end,
    Sb@6 = begin
        _pipe@39 = Sb@5,
        _pipe@40 = oaspec@util@string_extra:doc_comment(
            _pipe@39,
            <<"Apply a list of middleware to a handler."/utf8>>
        ),
        _pipe@41 = oaspec@util@string_extra:doc_comment(
            _pipe@40,
            <<"Middleware is applied in order: first in list = outermost."/utf8>>
        ),
        _pipe@42 = oaspec@util@string_extra:line(
            _pipe@41,
            <<"pub fn apply("/utf8>>
        ),
        _pipe@43 = oaspec@util@string_extra:indent(
            _pipe@42,
            1,
            <<"middlewares: List(Middleware(req, res)),"/utf8>>
        ),
        _pipe@44 = oaspec@util@string_extra:indent(
            _pipe@43,
            1,
            <<"handler: Handler(req, res),"/utf8>>
        ),
        _pipe@45 = oaspec@util@string_extra:line(
            _pipe@44,
            <<") -> Handler(req, res) {"/utf8>>
        ),
        _pipe@46 = oaspec@util@string_extra:indent(
            _pipe@45,
            1,
            <<"case middlewares {"/utf8>>
        ),
        _pipe@47 = oaspec@util@string_extra:indent(
            _pipe@46,
            2,
            <<"[] -> handler"/utf8>>
        ),
        _pipe@48 = oaspec@util@string_extra:indent(
            _pipe@47,
            2,
            <<"[mw, ..rest] -> mw(apply(rest, handler))"/utf8>>
        ),
        _pipe@49 = oaspec@util@string_extra:indent(_pipe@48, 1, <<"}"/utf8>>),
        _pipe@50 = oaspec@util@string_extra:line(_pipe@49, <<"}"/utf8>>),
        oaspec@util@string_extra:blank_line(_pipe@50)
    end,
    Sb@7 = begin
        _pipe@51 = Sb@6,
        _pipe@52 = oaspec@util@string_extra:doc_comment(
            _pipe@51,
            <<"Example: A logging middleware stub."/utf8>>
        ),
        _pipe@53 = oaspec@util@string_extra:doc_comment(
            _pipe@52,
            <<"Replace the body with your logging implementation."/utf8>>
        ),
        _pipe@54 = oaspec@util@string_extra:line(
            _pipe@53,
            <<"pub fn logging() -> Middleware(req, res) {"/utf8>>
        ),
        _pipe@55 = oaspec@util@string_extra:indent(
            _pipe@54,
            1,
            <<"fn(handler: Handler(req, res)) -> Handler(req, res) {"/utf8>>
        ),
        _pipe@56 = oaspec@util@string_extra:indent(
            _pipe@55,
            2,
            <<"fn(request: req) -> Result(res, MiddlewareError) {"/utf8>>
        ),
        _pipe@57 = oaspec@util@string_extra:indent(
            _pipe@56,
            3,
            <<"// TODO: Add logging before/after the handler call"/utf8>>
        ),
        _pipe@58 = oaspec@util@string_extra:indent(
            _pipe@57,
            3,
            <<"handler(request)"/utf8>>
        ),
        _pipe@59 = oaspec@util@string_extra:indent(_pipe@58, 2, <<"}"/utf8>>),
        _pipe@60 = oaspec@util@string_extra:indent(_pipe@59, 1, <<"}"/utf8>>),
        _pipe@61 = oaspec@util@string_extra:line(_pipe@60, <<"}"/utf8>>),
        oaspec@util@string_extra:blank_line(_pipe@61)
    end,
    Sb@8 = begin
        _pipe@62 = Sb@7,
        _pipe@63 = oaspec@util@string_extra:doc_comment(
            _pipe@62,
            <<"Retry middleware for client operations."/utf8>>
        ),
        _pipe@64 = oaspec@util@string_extra:doc_comment(
            _pipe@63,
            <<"Retries the handler up to max_retries times on failure."/utf8>>
        ),
        _pipe@65 = oaspec@util@string_extra:line(
            _pipe@64,
            <<"pub fn retry(max_retries: Int) -> Middleware(req, res) {"/utf8>>
        ),
        _pipe@66 = oaspec@util@string_extra:indent(
            _pipe@65,
            1,
            <<"fn(handler: Handler(req, res)) -> Handler(req, res) {"/utf8>>
        ),
        _pipe@67 = oaspec@util@string_extra:indent(
            _pipe@66,
            2,
            <<"fn(request: req) -> Result(res, MiddlewareError) {"/utf8>>
        ),
        _pipe@68 = oaspec@util@string_extra:indent(
            _pipe@67,
            3,
            <<"do_retry(handler, request, max_retries, 0)"/utf8>>
        ),
        _pipe@69 = oaspec@util@string_extra:indent(_pipe@68, 2, <<"}"/utf8>>),
        _pipe@70 = oaspec@util@string_extra:indent(_pipe@69, 1, <<"}"/utf8>>),
        _pipe@71 = oaspec@util@string_extra:line(_pipe@70, <<"}"/utf8>>),
        oaspec@util@string_extra:blank_line(_pipe@71)
    end,
    Sb@9 = begin
        _pipe@72 = Sb@8,
        _pipe@73 = oaspec@util@string_extra:line(
            _pipe@72,
            <<"fn do_retry("/utf8>>
        ),
        _pipe@74 = oaspec@util@string_extra:indent(
            _pipe@73,
            1,
            <<"handler: Handler(req, res),"/utf8>>
        ),
        _pipe@75 = oaspec@util@string_extra:indent(
            _pipe@74,
            1,
            <<"request: req,"/utf8>>
        ),
        _pipe@76 = oaspec@util@string_extra:indent(
            _pipe@75,
            1,
            <<"max_retries: Int,"/utf8>>
        ),
        _pipe@77 = oaspec@util@string_extra:indent(
            _pipe@76,
            1,
            <<"attempt: Int,"/utf8>>
        ),
        _pipe@78 = oaspec@util@string_extra:line(
            _pipe@77,
            <<") -> Result(res, MiddlewareError) {"/utf8>>
        ),
        _pipe@79 = oaspec@util@string_extra:indent(
            _pipe@78,
            1,
            <<"case handler(request) {"/utf8>>
        ),
        _pipe@80 = oaspec@util@string_extra:indent(
            _pipe@79,
            2,
            <<"Ok(response) -> Ok(response)"/utf8>>
        ),
        _pipe@81 = oaspec@util@string_extra:indent(
            _pipe@80,
            2,
            <<"Error(err) -> {"/utf8>>
        ),
        _pipe@82 = oaspec@util@string_extra:indent(
            _pipe@81,
            3,
            <<"case attempt < max_retries {"/utf8>>
        ),
        _pipe@83 = oaspec@util@string_extra:indent(
            _pipe@82,
            4,
            <<"True -> do_retry(handler, request, max_retries, attempt + 1)"/utf8>>
        ),
        _pipe@84 = oaspec@util@string_extra:indent(
            _pipe@83,
            4,
            <<"False -> Error(err)"/utf8>>
        ),
        _pipe@85 = oaspec@util@string_extra:indent(_pipe@84, 3, <<"}"/utf8>>),
        _pipe@86 = oaspec@util@string_extra:indent(_pipe@85, 2, <<"}"/utf8>>),
        _pipe@87 = oaspec@util@string_extra:indent(_pipe@86, 1, <<"}"/utf8>>),
        _pipe@88 = oaspec@util@string_extra:line(_pipe@87, <<"}"/utf8>>),
        oaspec@util@string_extra:blank_line(_pipe@88)
    end,
    _ = Ctx,
    oaspec@util@string_extra:to_string(Sb@9).

-file("src/oaspec/codegen/middleware.gleam", 5).
?DOC(" Generate middleware module.\n").
-spec generate(oaspec@codegen@context:context()) -> list(oaspec@codegen@context:generated_file()).
generate(Ctx) ->
    Content = generate_middleware(Ctx),
    [{generated_file, <<"middleware.gleam"/utf8>>, Content, shared_target}].