% Licensed under the Apache License, Version 2.0 (the "License"); you may not
% use this file except in compliance with the License. You may obtain a copy of
% the License at
%
%   http://www.apache.org/licenses/LICENSE-2.0
%
% Unless required by applicable law or agreed to in writing, software
% distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
% WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
% License for the specific language governing permissions and limitations under
% the License.

-module(chttpd_db_test).

-include_lib("couch/include/couch_eunit.hrl").
-include_lib("couch/include/couch_db.hrl").

-define(USER, "chttpd_db_test_admin").
-define(PASS, "pass").
-define(AUTH, {basic_auth, {?USER, ?PASS}}).
-define(CONTENT_JSON, {"Content-Type", "application/json"}).
-define(DESTHEADER1, {"Destination", "foo%E5%95%8Abar"}).
-define(DESTHEADER2, {"Destination", "foo%2Fbar%23baz%3Fpow%3Afiz"}).
-define(FIXTURE_TXT, ?ABS_PATH(?FILE)).
-define(i2l(I), integer_to_list(I)).
% seconds
-define(TIMEOUT, 60).

setup() ->
    Hashed = couch_passwords:hash_admin_password(?PASS),
    ok = config:set("admins", ?USER, ?b2l(Hashed), _Persist = false),
    TmpDb = ?tempdb(),
    Addr = config:get("chttpd", "bind_address", "127.0.0.1"),
    Port = mochiweb_socket_server:get(chttpd, port),
    Url = lists:concat(["http://", Addr, ":", Port, "/", ?b2l(TmpDb)]),
    create_db(Url),
    Url.

teardown(Url) ->
    delete_db(Url),
    ok = config:delete("admins", ?USER, _Persist = false).

create_db(Url) ->
    {ok, Status, _, _} = test_request:put(Url, [?CONTENT_JSON, ?AUTH], "{}"),
    ?assert(Status =:= 201 orelse Status =:= 202).

create_doc(Url, Id) ->
    test_request:put(
        Url ++ "/" ++ Id,
        [?CONTENT_JSON, ?AUTH],
        "{\"mr\": \"rockoartischocko\"}"
    ).

delete_db(Url) ->
    {ok, 200, _, _} = test_request:delete(Url, [?AUTH]).

all_test_() ->
    {
        "chttpd db tests",
        {
            setup,
            fun chttpd_test_util:start_couch/0,
            fun chttpd_test_util:stop_couch/1,
            {
                foreach,
                fun setup/0,
                fun teardown/1,
                [
                    fun should_return_ok_true_on_bulk_update/1,
                    fun should_return_ok_true_on_ensure_full_commit/1,
                    fun should_return_404_for_ensure_full_commit_on_no_db/1,
                    fun should_accept_live_as_an_alias_for_continuous/1,
                    fun should_return_headers_after_starting_continious/1,
                    fun should_return_404_for_delete_att_on_notadoc/1,
                    fun should_return_409_for_del_att_without_rev/1,
                    fun should_return_200_for_del_att_with_rev/1,
                    fun should_return_409_for_put_att_nonexistent_rev/1,
                    fun should_return_update_seq_when_set_on_all_docs/1,
                    fun should_not_return_update_seq_when_unset_on_all_docs/1,
                    fun should_return_correct_id_on_doc_copy/1,
                    fun should_ignore_engine_parameter/1,
                    fun should_return_only_one_ok_on_doc_copy/1,
                    fun should_succeed_on_all_docs_with_queries_keys/1,
                    fun should_succeed_on_all_docs_with_queries_limit_skip/1,
                    fun should_succeed_on_all_docs_with_multiple_queries/1,
                    fun should_succeed_on_design_docs_with_queries_keys/1,
                    fun should_succeed_on_design_docs_with_queries_limit_skip/1,
                    fun should_succeed_on_design_docs_with_multiple_queries/1,
                    fun should_succeed_on_local_docs_with_queries_keys/1,
                    fun should_succeed_on_local_docs_with_queries_limit_skip/1,
                    fun should_succeed_on_local_docs_with_multiple_queries/1
                ]
            }
        }
    }.

should_return_ok_true_on_bulk_update(Url) ->
    {timeout, ?TIMEOUT,
        ?_assertEqual(
            true,
            begin
                {ok, _, _, Body} = create_doc(Url, "testdoc"),
                {Json} = ?JSON_DECODE(Body),
                Ref = couch_util:get_value(<<"rev">>, Json, undefined),
                NewDoc = "{\"docs\": [{\"_rev\": \"" ++ ?b2l(Ref) ++ "\", \"_id\": \"testdoc\"}]}",
                {ok, _, _, ResultBody} = test_request:post(
                    Url ++ "/_bulk_docs/",
                    [?CONTENT_JSON, ?AUTH],
                    NewDoc
                ),
                ResultJson = ?JSON_DECODE(ResultBody),
                {InnerJson} = lists:nth(1, ResultJson),
                couch_util:get_value(<<"ok">>, InnerJson, undefined)
            end
        )}.

should_return_ok_true_on_ensure_full_commit(Url0) ->
    {timeout, ?TIMEOUT,
        ?_test(begin
            Url = Url0 ++ "/_ensure_full_commit",
            {ok, RC, _, Body} = test_request:post(Url, [?CONTENT_JSON, ?AUTH], []),
            {Json} = ?JSON_DECODE(Body),
            ?assertEqual(201, RC),
            ?assert(couch_util:get_value(<<"ok">>, Json))
        end)}.

should_return_404_for_ensure_full_commit_on_no_db(Url0) ->
    {timeout, ?TIMEOUT,
        ?_test(begin
            Url = Url0 ++ "-missing-db" ++ "/_ensure_full_commit",
            {ok, RC, _, Body} = test_request:post(Url, [?CONTENT_JSON, ?AUTH], []),
            {Json} = ?JSON_DECODE(Body),
            ?assertEqual(404, RC),
            ?assertEqual(<<"not_found">>, couch_util:get_value(<<"error">>, Json))
        end)}.

should_accept_live_as_an_alias_for_continuous(Url) ->
    GetLastSeq = fun(Chunks) ->
        LastSeqBin = lists:last(Chunks),
        {Result} =
            try ?JSON_DECODE(LastSeqBin) of
                Data -> Data
            catch
                _:_ ->
                    % should not happen, abort
                    ?assert(false)
            end,
        couch_util:get_value(<<"last_seq">>, Result, undefined)
    end,
    {timeout, ?TIMEOUT,
        ?_test(begin
            LastSeq1 = GetLastSeq(wait_non_empty_chunk(Url)),

            {ok, _, _, _} = create_doc(Url, "testdoc2"),

            LastSeq2 = GetLastSeq(wait_non_empty_chunk(Url)),

            ?assertNotEqual(LastSeq1, LastSeq2)
        end)}.

should_return_404_for_delete_att_on_notadoc(Url) ->
    {timeout, ?TIMEOUT,
        ?_test(begin
            {ok, RC, _, RespBody} = test_request:delete(
                Url ++ "/notadoc/att.pdf",
                [?CONTENT_JSON, ?AUTH],
                []
            ),
            ?assertEqual(404, RC),
            ?assertEqual(
                {[
                    {<<"error">>, <<"not_found">>},
                    {<<"reason">>, <<"missing">>}
                ]},
                jiffy:decode(RespBody)
            ),
            {ok, RC1, _, _} = test_request:get(
                Url ++ "/notadoc",
                [?CONTENT_JSON, ?AUTH],
                []
            ),
            ?assertEqual(404, RC1)
        end)}.

should_return_409_for_del_att_without_rev(Url) ->
    {timeout, ?TIMEOUT,
        ?_test(begin
            {ok, RC, _, _} = test_request:put(
                Url ++ "/testdoc3",
                [?CONTENT_JSON, ?AUTH],
                jiffy:encode(attachment_doc())
            ),
            ?assertEqual(201, RC),

            {ok, RC1, _, _} = test_request:delete(
                Url ++ "/testdoc3/file.erl",
                [?CONTENT_JSON, ?AUTH],
                []
            ),
            ?assertEqual(409, RC1)
        end)}.

should_return_200_for_del_att_with_rev(Url) ->
    {timeout, ?TIMEOUT,
        ?_test(begin
            {ok, RC, _Headers, RespBody} = test_request:put(
                Url ++ "/testdoc4",
                [?CONTENT_JSON, ?AUTH],
                jiffy:encode(attachment_doc())
            ),
            ?assertEqual(201, RC),

            {ResultJson} = ?JSON_DECODE(RespBody),
            Rev = couch_util:get_value(<<"rev">>, ResultJson, undefined),

            {ok, RC1, _, _} = test_request:delete(
                Url ++ "/testdoc4/file.erl?rev=" ++ Rev,
                [?CONTENT_JSON, ?AUTH],
                []
            ),
            ?assertEqual(200, RC1)
        end)}.

should_return_409_for_put_att_nonexistent_rev(Url) ->
    {timeout, ?TIMEOUT,
        ?_test(begin
            {ok, RC, _Headers, RespBody} = test_request:put(
                Url ++ "/should_return_404/file.erl?rev=1-000",
                [?CONTENT_JSON, ?AUTH],
                jiffy:encode(attachment_doc())
            ),
            ?assertEqual(409, RC),
            ?assertMatch(
                {[
                    {<<"error">>, <<"not_found">>},
                    {<<"reason">>, <<"missing_rev">>}
                ]},
                ?JSON_DECODE(RespBody)
            )
        end)}.

should_return_update_seq_when_set_on_all_docs(Url) ->
    {timeout, ?TIMEOUT,
        ?_test(begin
            [create_doc(Url, "testdoc" ++ ?i2l(I)) || I <- lists:seq(1, 3)],
            {ok, RC, _, RespBody} = test_request:get(
                Url ++ "/_all_docs/" ++
                    "?update_seq=true&keys=[\"testdoc1\"]",
                [?CONTENT_JSON, ?AUTH]
            ),
            ?assertEqual(200, RC),
            {ResultJson} = ?JSON_DECODE(RespBody),
            ?assertNotEqual(
                undefined,
                couch_util:get_value(<<"update_seq">>, ResultJson)
            ),
            ?assertNotEqual(
                undefined,
                couch_util:get_value(<<"offset">>, ResultJson)
            )
        end)}.

should_not_return_update_seq_when_unset_on_all_docs(Url) ->
    {timeout, ?TIMEOUT,
        ?_test(begin
            [create_doc(Url, "testdoc" ++ ?i2l(I)) || I <- lists:seq(1, 3)],
            {ok, RC, _, RespBody} = test_request:get(
                Url ++ "/_all_docs/" ++
                    "?update_seq=false&keys=[\"testdoc1\"]",
                [?CONTENT_JSON, ?AUTH]
            ),
            ?assertEqual(200, RC),
            {ResultJson} = ?JSON_DECODE(RespBody),
            ?assertEqual(
                undefined,
                couch_util:get_value(<<"update_seq">>, ResultJson)
            ),
            ?assertNotEqual(
                undefined,
                couch_util:get_value(<<"offset">>, ResultJson)
            )
        end)}.

should_return_correct_id_on_doc_copy(Url) ->
    {timeout, ?TIMEOUT,
        ?_test(begin
            {ok, _, _, _} = create_doc(Url, "testdoc"),
            {_, _, _, ResultBody1} = test_request:copy(
                Url ++ "/testdoc/",
                [?CONTENT_JSON, ?AUTH, ?DESTHEADER1]
            ),
            {ResultJson1} = ?JSON_DECODE(ResultBody1),
            Id1 = couch_util:get_value(<<"id">>, ResultJson1),

            {_, _, _, ResultBody2} = test_request:copy(
                Url ++ "/testdoc/",
                [?CONTENT_JSON, ?AUTH, ?DESTHEADER2]
            ),
            {ResultJson2} = ?JSON_DECODE(ResultBody2),
            Id2 = couch_util:get_value(<<"id">>, ResultJson2),
            [
                ?assertEqual(<<102, 111, 111, 229, 149, 138, 98, 97, 114>>, Id1),
                ?assertEqual(<<"foo/bar#baz?pow:fiz">>, Id2)
            ]
        end)}.

should_return_only_one_ok_on_doc_copy(Url) ->
    {timeout, ?TIMEOUT,
        ?_test(begin
            {ok, _, _, _} = create_doc(Url, "testdoc"),
            {_, _, _, ResultBody} = test_request:copy(
                Url ++ "/testdoc",
                [?CONTENT_JSON, ?AUTH, ?DESTHEADER1]
            ),
            {ResultJson} = jiffy:decode(ResultBody),
            NumOks = length(lists:filter(fun({Key, Value}) -> Key == <<"ok">> end, ResultJson)),
            [
                ?assertEqual(1, NumOks)
            ]
        end)}.

attachment_doc() ->
    {ok, Data} = file:read_file(?FIXTURE_TXT),
    {[
        {<<"_attachments">>,
            {[
                {<<"file.erl">>,
                    {[
                        {<<"content_type">>, <<"text/plain">>},
                        {<<"data">>, base64:encode(Data)}
                    ]}}
            ]}}
    ]}.

should_ignore_engine_parameter(_) ->
    {timeout, ?TIMEOUT,
        ?_test(begin
            TmpDb = ?tempdb(),
            Addr = config:get("chttpd", "bind_address", "127.0.0.1"),
            Port = mochiweb_socket_server:get(chttpd, port),
            BaseUrl = lists:concat(["http://", Addr, ":", Port, "/", ?b2l(TmpDb)]),
            Url = BaseUrl ++ "?engine=cowabunga",
            {ok, Status, _, _} = test_request:put(Url, [?CONTENT_JSON, ?AUTH], "{}"),
            ?assertEqual(201, Status)
        end)}.

should_succeed_on_all_docs_with_queries_keys(Url) ->
    {timeout, ?TIMEOUT,
        ?_test(begin
            [create_doc(Url, "testdoc" ++ ?i2l(I)) || I <- lists:seq(1, 10)],
            QueryDoc = "{\"queries\": [{\"keys\": [ \"testdoc3\", \"testdoc8\"]}]}",
            {ok, RC, _, RespBody} = test_request:post(
                Url ++ "/_all_docs/queries/",
                [?CONTENT_JSON, ?AUTH],
                QueryDoc
            ),
            ?assertEqual(200, RC),
            {ResultJson} = ?JSON_DECODE(RespBody),
            ResultJsonBody = couch_util:get_value(<<"results">>, ResultJson),
            {InnerJson} = lists:nth(1, ResultJsonBody),
            ?assertEqual(2, length(couch_util:get_value(<<"rows">>, InnerJson)))
        end)}.

should_succeed_on_all_docs_with_queries_limit_skip(Url) ->
    {timeout, ?TIMEOUT,
        ?_test(begin
            [create_doc(Url, "testdoc" ++ ?i2l(I)) || I <- lists:seq(1, 10)],
            QueryDoc = "{\"queries\": [{\"limit\": 5, \"skip\": 2}]}",
            {ok, RC, _, RespBody} = test_request:post(
                Url ++ "/_all_docs/queries/",
                [?CONTENT_JSON, ?AUTH],
                QueryDoc
            ),
            ?assertEqual(200, RC),
            {ResultJson} = ?JSON_DECODE(RespBody),
            ResultJsonBody = couch_util:get_value(<<"results">>, ResultJson),
            {InnerJson} = lists:nth(1, ResultJsonBody),
            ?assertEqual(null, couch_util:get_value(<<"offset">>, InnerJson)),
            ?assertEqual(5, length(couch_util:get_value(<<"rows">>, InnerJson)))
        end)}.

should_succeed_on_all_docs_with_multiple_queries(Url) ->
    {timeout, ?TIMEOUT,
        ?_test(begin
            [create_doc(Url, "testdoc" ++ ?i2l(I)) || I <- lists:seq(1, 10)],
            QueryDoc =
                "{\"queries\": [{\"keys\": [ \"testdoc3\", \"testdoc8\"]},\n"
                "            {\"limit\": 5, \"skip\": 2}]}",
            {ok, RC, _, RespBody} = test_request:post(
                Url ++ "/_all_docs/queries/",
                [?CONTENT_JSON, ?AUTH],
                QueryDoc
            ),
            ?assertEqual(200, RC),
            {ResultJson} = ?JSON_DECODE(RespBody),
            ResultJsonBody = couch_util:get_value(<<"results">>, ResultJson),
            {InnerJson1} = lists:nth(1, ResultJsonBody),
            ?assertEqual(2, length(couch_util:get_value(<<"rows">>, InnerJson1))),
            {InnerJson2} = lists:nth(2, ResultJsonBody),
            ?assertEqual(null, couch_util:get_value(<<"offset">>, InnerJson2)),
            ?assertEqual(5, length(couch_util:get_value(<<"rows">>, InnerJson2)))
        end)}.

should_succeed_on_design_docs_with_queries_keys(Url) ->
    {timeout, ?TIMEOUT,
        ?_test(begin
            [create_doc(Url, "_design/ddoc" ++ ?i2l(I)) || I <- lists:seq(1, 10)],
            QueryDoc =
                "{\"queries\": [{\"keys\": [ \"_design/ddoc3\",\n"
                "            \"_design/ddoc8\"]}]}",
            {ok, RC, _, RespBody} = test_request:post(
                Url ++
                    "/_design_docs/queries/",
                [?CONTENT_JSON, ?AUTH],
                QueryDoc
            ),
            ?assertEqual(200, RC),
            {ResultJson} = ?JSON_DECODE(RespBody),
            ResultJsonBody = couch_util:get_value(<<"results">>, ResultJson),
            {InnerJson} = lists:nth(1, ResultJsonBody),
            ?assertEqual(2, length(couch_util:get_value(<<"rows">>, InnerJson)))
        end)}.

should_succeed_on_design_docs_with_queries_limit_skip(Url) ->
    {timeout, ?TIMEOUT,
        ?_test(begin
            [create_doc(Url, "_design/ddoc" ++ ?i2l(I)) || I <- lists:seq(1, 10)],
            QueryDoc = "{\"queries\": [{\"limit\": 5, \"skip\": 2}]}",
            {ok, RC, _, RespBody} = test_request:post(
                Url ++
                    "/_design_docs/queries/",
                [?CONTENT_JSON, ?AUTH],
                QueryDoc
            ),
            ?assertEqual(200, RC),
            {ResultJson} = ?JSON_DECODE(RespBody),
            ResultJsonBody = couch_util:get_value(<<"results">>, ResultJson),
            {InnerJson} = lists:nth(1, ResultJsonBody),
            ?assertEqual(null, couch_util:get_value(<<"offset">>, InnerJson)),
            ?assertEqual(5, length(couch_util:get_value(<<"rows">>, InnerJson)))
        end)}.

should_succeed_on_design_docs_with_multiple_queries(Url) ->
    {timeout, ?TIMEOUT,
        ?_test(begin
            [create_doc(Url, "_design/ddoc" ++ ?i2l(I)) || I <- lists:seq(1, 10)],
            QueryDoc =
                "{\"queries\": [{\"keys\": [ \"_design/ddoc3\",\n"
                "            \"_design/ddoc8\"]}, {\"limit\": 5, \"skip\": 2}]}",
            {ok, RC, _, RespBody} = test_request:post(
                Url ++
                    "/_design_docs/queries/",
                [?CONTENT_JSON, ?AUTH],
                QueryDoc
            ),
            ?assertEqual(200, RC),
            {ResultJson} = ?JSON_DECODE(RespBody),
            ResultJsonBody = couch_util:get_value(<<"results">>, ResultJson),
            {InnerJson1} = lists:nth(1, ResultJsonBody),
            ?assertEqual(2, length(couch_util:get_value(<<"rows">>, InnerJson1))),
            {InnerJson2} = lists:nth(2, ResultJsonBody),
            ?assertEqual(null, couch_util:get_value(<<"offset">>, InnerJson2)),
            ?assertEqual(5, length(couch_util:get_value(<<"rows">>, InnerJson2)))
        end)}.

should_succeed_on_local_docs_with_queries_keys(Url) ->
    {timeout, ?TIMEOUT,
        ?_test(begin
            [create_doc(Url, "_local/doc" ++ ?i2l(I)) || I <- lists:seq(1, 10)],
            QueryDoc =
                "{\"queries\": [{\"keys\":\n"
                "            [ \"_local/doc3\", \"_local/doc8\"]}]}",
            {ok, RC, _, RespBody} = test_request:post(
                Url ++ "/_local_docs/queries/",
                [?CONTENT_JSON, ?AUTH],
                QueryDoc
            ),
            ?assertEqual(200, RC),
            {ResultJson} = ?JSON_DECODE(RespBody),
            ResultJsonBody = couch_util:get_value(<<"results">>, ResultJson),
            {InnerJson} = lists:nth(1, ResultJsonBody),
            ?assertEqual(2, length(couch_util:get_value(<<"rows">>, InnerJson)))
        end)}.

should_succeed_on_local_docs_with_queries_limit_skip(Url) ->
    {timeout, ?TIMEOUT,
        ?_test(begin
            [create_doc(Url, "_local/doc" ++ ?i2l(I)) || I <- lists:seq(1, 10)],
            QueryDoc = "{\"queries\": [{\"limit\": 5, \"skip\": 2}]}",
            {ok, RC, _, RespBody} = test_request:post(
                Url ++
                    "/_local_docs/queries/",
                [?CONTENT_JSON, ?AUTH],
                QueryDoc
            ),
            ?assertEqual(200, RC),
            {ResultJson} = ?JSON_DECODE(RespBody),
            ResultJsonBody = couch_util:get_value(<<"results">>, ResultJson),
            {InnerJson} = lists:nth(1, ResultJsonBody),
            ?assertEqual(5, length(couch_util:get_value(<<"rows">>, InnerJson)))
        end)}.

should_succeed_on_local_docs_with_multiple_queries(Url) ->
    {timeout, ?TIMEOUT,
        ?_test(begin
            [create_doc(Url, "_local/doc" ++ ?i2l(I)) || I <- lists:seq(1, 10)],
            QueryDoc =
                "{\"queries\": [{\"keys\": [ \"_local/doc3\",\n"
                "            \"_local/doc8\"]}, {\"limit\": 5, \"skip\": 2}]}",
            {ok, RC, _, RespBody} = test_request:post(
                Url ++
                    "/_local_docs/queries/",
                [?CONTENT_JSON, ?AUTH],
                QueryDoc
            ),
            ?assertEqual(200, RC),
            {ResultJson} = ?JSON_DECODE(RespBody),
            ResultJsonBody = couch_util:get_value(<<"results">>, ResultJson),
            {InnerJson1} = lists:nth(1, ResultJsonBody),
            ?assertEqual(2, length(couch_util:get_value(<<"rows">>, InnerJson1))),
            {InnerJson2} = lists:nth(2, ResultJsonBody),
            ?assertEqual(5, length(couch_util:get_value(<<"rows">>, InnerJson2)))
        end)}.

should_return_headers_after_starting_continious(Url) ->
    {timeout, ?TIMEOUT,
        ?_test(begin
            {ok, _, _, Bin} =
                test_request:get(Url ++ "/_changes?feed=live&timeout=1", [?AUTH]),

            Parts = binary:split(Bin, <<"\n">>, [global]),
            %% we should receive at least one part even when timeout=1
            ?assertNotEqual([], Parts)
        end)}.

wait_non_empty_chunk(Url) ->
    test_util:wait(fun() ->
        {ok, _, _, Bin} =
            test_request:get(Url ++ "/_changes?feed=live&timeout=1", [?AUTH]),

        Parts = binary:split(Bin, <<"\n">>, [global]),

        case [P || P <- Parts, size(P) > 0] of
            [] -> wait;
            Chunks -> Chunks
        end
    end).