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(.require
 [library
  [lux (.except Module)
   ["[0]" debug]
   [abstract
    ["[0]" monad (.only do)]]
   [control
    ["[0]" io (.only IO io)]
    ["[0]" maybe]
    ["[0]" try (.only Try)]
    [concurrency
     ["[0]" async (.only Async) (.use "[1]#[0]" monad)]]]
   [data
    [binary (.only Binary)]
    ["[0]" product]
    ["[0]" text (.only)
     ["%" \\format (.only format)]]
    [collection
     ["[0]" dictionary (.only Dictionary)]]]
   [meta
    [type (.only sharing)]
    ["@" target]
    ["[0]" compiler
     ["[0]" phase]
     [default
      ["[0]" platform (.only Platform)]]
     [language
      ["$" lux (.only)
       ["[1]/[0]" program (.only Program)]
       ["[0]" syntax]
       ["[0]" generation]
       ["[0]" declaration]
       ["[0]" analysis (.only)
        [macro (.only Expander)]]
       [phase
        [extension (.only Extender)
         ["[0]E" analysis]]]]]
     [meta
      [packager (.only Packager)]
      [context (.only Context)]
      ["[0]" cli (.only Service)]
      ["[0]" import]
      ["[0]" export]
      ["[0]" cache
       ["[1]" archive]]
      [archive (.only Archive)
       ["[0]" unit]
       [module
        [descriptor (.only Module)]]]
      [io
       ["ioW" archive]]]]
    ... ["[0]" interpreter]
    ]
   ["[0]" world
    ["[0]" file]
    ["[0]" console]
    ["[1]/[0]" environment]
    [time
     ["[0]" instant]]]]])

(def (or_crash! failure_description action)
  (All (_ a)
    (-> Text (Async (Try a)) (Async a)))
  (do [! async.monad]
    [?output action]
    (when ?output
      {try.#Failure error}
      (let [report (format text.new_line
                           failure_description text.new_line
                           error text.new_line)]
        (do !
          [_ (with_expansions [<else> (in {try.#Success (debug.log! report)})]
               (for @.js (is (Async (Try Any))
                             (when console.default
                               {.#None}
                               <else>

                               {.#Some console}
                               (console.write_line report console)))
                    (is (Async (Try Any))
                        <else>)))]
          (io.run! (at world/environment.default exit +1))))

      {try.#Success output}
      (in output))))

(def (timed process)
  (All (_ a)
    (-> (Async (Try a)) (Async (Try a))))
  (do async.monad
    [.let [start (io.run! instant.now)]
     output process
     .let [_ (debug.log! (|> (io.run! instant.now)
                             (instant.span start)
                             %.duration
                             (format "Duration: ")))]]
    (in output)))

(def (package! fs host_dependencies [packager package] archive context)
  (-> (file.System Async) (Dictionary file.Path Binary) [Packager file.Path] Archive (Maybe unit.ID) (Async (Try Any)))
  (when (packager host_dependencies archive context)
    {try.#Success content}
    (when content
      {.#Left content}
      (at fs write package content)
      
      {.#Right content}
      (do [! (try.with async.monad)]
        [_ (at fs make_directory package)
         _ (monad.each ! (function (_ [name content])
                           (at fs write (file.rooted fs package name) content))
                       content)]
        (in [])))
    
    {try.#Failure error}
    (at async.monad in {try.#Failure error})))

(def (load_host_dependencies fs host_dependencies)
  (-> (file.System Async) (List file.Path) (Async (Try (Dictionary file.Path Binary))))
  (do [! (try.with async.monad)]
    []
    (loop (again [pending host_dependencies
                  output (is (Dictionary file.Path Binary)
                             (dictionary.empty text.hash))])
      (when pending
        {.#End}
        (in output)

        {.#Item head tail}
        (do !
          [content (at fs read head)]
          (again tail
                 (dictionary.has head content output)))))))

(with_expansions [<parameters> (these anchor expression artifact)]
  (def .public (compiler lux_compiler file_context
                         expander host_analysis platform generation_bundle host_declaration_bundle program global extender
                         service
                         packager,package)
    (All (_ <parameters>)
      (-> (-> Any platform.Custom)
          Context
          Expander
          analysis.Bundle
          (IO (Platform <parameters>))
          (generation.Bundle <parameters>)
          (declaration.Bundle <parameters>)
          (Program expression artifact) (-> Archive Symbol (generation.Operation <parameters> expression))
          Extender
          Service
          [Packager file.Path]
          (Async Any)))
    (do [! async.monad]
      [platform (async.future platform)]
      (when service
        {cli.#Compilation compilation}
        (<| (or_crash! "Compilation failed:")
            ..timed
            (do (try.with async.monad)
              [import (import.import (the platform.#file_system platform) (the cli.#libraries compilation))
               .let [all_extensions [(analysisE.bundle host_analysis)
                                     generation_bundle
                                     host_declaration_bundle]]
               [state archive phase_wrapper] (sharing [<parameters>]
                                               (is (Platform <parameters>)
                                                   platform)
                                               (is (Async (Try [(declaration.State <parameters>)
                                                                Archive
                                                                phase.Wrapper]))
                                                   (as_expected (platform.initialize file_context
                                                                                     (the cli.#module compilation)
                                                                                     expander
                                                                                     platform
                                                                                     program
                                                                                     extender
                                                                                     import
                                                                                     (the cli.#sources compilation)
                                                                                     (the cli.#configuration compilation)
                                                                                     all_extensions))))
               [archive state] (sharing [<parameters>]
                                 (is (Platform <parameters>)
                                     platform)
                                 (is (Async (Try [Archive (declaration.State <parameters>)]))
                                     (as_expected (platform.compile program
                                                                    global
                                                                    lux_compiler
                                                                    phase_wrapper
                                                                    import
                                                                    file_context
                                                                    extender
                                                                    expander
                                                                    platform
                                                                    compilation
                                                                    [archive state]
                                                                    all_extensions))))
               _ (cache.cache! (the platform.#file_system platform) (the cli.#configuration compilation) file_context archive)
               host_dependencies (..load_host_dependencies (the platform.#file_system platform)
                                                           (the cli.#host_dependencies compilation))

               _ (..package! (for @.old (file.async file.default)
                                  @.jvm (file.async file.default)
                                  ... TODO: Handle this in a safer manner.
                                  ... This would crash if the compiler was run on a browser.
                                  @.js (maybe.trusted file.default))
                             host_dependencies
                             packager,package
                             archive
                             (try.maybe ($/program.context archive)))]
              (in (debug.log! "Compilation complete!"))))

        {cli.#Export export}
        (<| (or_crash! "Export failed:")
            (do (try.with async.monad)
              [_ (export.export (the platform.#file_system platform)
                   export)]
              (in (debug.log! "Export complete!"))))
        
        {cli.#Interpretation interpretation}
        ... TODO: Fix the interpreter...
        (undefined)
        ... (<| (or_crash! "Interpretation failed:")
        ...     (do [! async.monad]
        ...       [console (|> console.default
        ...                    async.future
        ...                    (at ! each (|>> try.trusted console.async)))]
        ...       (interpreter.run! (try.with async.monad) console platform interpretation generation_bundle)))
        ))))