-module(gleamy@priority_queue).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).

-export([new/1, pop/1, peek/1, push/2, is_empty/1, count/1, reorder/2, from_list/2, to_list/1]).

-file("/home/julian/projects/gleamy_structures/src/gleamy/priority_queue.gleam", 14).
-spec new(fun((HNN, HNN) -> gleam@order:order())) -> gleamy@pairing_heap:heap(HNN).
new(Compare) ->
    gleamy@pairing_heap:new(Compare).

-file("/home/julian/projects/gleamy_structures/src/gleamy/priority_queue.gleam", 20).
-spec pop(gleamy@pairing_heap:heap(HNP)) -> {ok,
        {HNP, gleamy@pairing_heap:heap(HNP)}} |
    {error, nil}.
pop(Queue) ->
    gleamy@pairing_heap:delete_min(Queue).

-file("/home/julian/projects/gleamy_structures/src/gleamy/priority_queue.gleam", 25).
-spec peek(gleamy@pairing_heap:heap(HNU)) -> {ok, HNU} | {error, nil}.
peek(Queue) ->
    gleamy@pairing_heap:find_min(Queue).

-file("/home/julian/projects/gleamy_structures/src/gleamy/priority_queue.gleam", 30).
-spec push(gleamy@pairing_heap:heap(HNY), HNY) -> gleamy@pairing_heap:heap(HNY).
push(Queue, Item) ->
    gleamy@pairing_heap:insert(Queue, Item).

-file("/home/julian/projects/gleamy_structures/src/gleamy/priority_queue.gleam", 35).
-spec is_empty(gleamy@pairing_heap:heap(any())) -> boolean().
is_empty(Queue) ->
    case gleamy@pairing_heap:find_min(Queue) of
        {ok, _} ->
            false;

        {error, _} ->
            true
    end.

-file("/home/julian/projects/gleamy_structures/src/gleamy/priority_queue.gleam", 44).
-spec count(gleamy@pairing_heap:heap(any())) -> integer().
count(Queue) ->
    case gleamy@pairing_heap:delete_min(Queue) of
        {ok, {_, Q}} ->
            count(Q) + 1;

        {error, _} ->
            0
    end.

-file("/home/julian/projects/gleamy_structures/src/gleamy/priority_queue.gleam", 52).
-spec reorder(
    gleamy@pairing_heap:heap(HOF),
    fun((HOF, HOF) -> gleam@order:order())
) -> gleamy@pairing_heap:heap(HOF).
reorder(Queue, Compare) ->
    case gleamy@pairing_heap:delete_min(Queue) of
        {ok, {X, Q}} ->
            gleamy@pairing_heap:insert(reorder(Q, Compare), X);

        {error, _} ->
            gleamy@pairing_heap:new(Compare)
    end.

-file("/home/julian/projects/gleamy_structures/src/gleamy/priority_queue.gleam", 60).
-spec from_list(list(HOI), fun((HOI, HOI) -> gleam@order:order())) -> gleamy@pairing_heap:heap(HOI).
from_list(List, Compare) ->
    gleam@list:fold(List, new(Compare), fun gleamy@pairing_heap:insert/2).

-file("/home/julian/projects/gleamy_structures/src/gleamy/priority_queue.gleam", 65).
-spec to_list(gleamy@pairing_heap:heap(HOL)) -> list(HOL).
to_list(Queue) ->
    case gleamy@pairing_heap:delete_min(Queue) of
        {ok, {X, Q}} ->
            [X | to_list(Q)];

        {error, _} ->
            []
    end.