% 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(couch_mrview_all_docs_tests).

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

-define(TIMEOUT, 1000).

setup() ->
    {ok, Db} = couch_mrview_test_util:init_db(?tempdb(), map),
    Db.

teardown(Db) ->
    couch_db:close(Db),
    couch_server:delete(couch_db:name(Db), [?ADMIN_CTX]),
    ok.

all_docs_test_() ->
    {
        "_all_docs view tests",
        {
            setup,
            fun test_util:start_couch/0,
            fun test_util:stop_couch/1,
            {
                foreach,
                fun setup/0,
                fun teardown/1,
                [
                    fun should_query/1,
                    fun should_query_with_range/1,
                    fun raise_error_query_with_range_and_keys/1,
                    fun should_query_with_range_rev/1,
                    fun should_query_with_limit_and_skip/1,
                    fun should_query_with_include_docs/1,
                    fun should_query_empty_views/1
                ]
            }
        }
    }.

should_query(Db) ->
    Result = run_query(Db, []),
    Expect =
        {ok, [
            {meta, [{total, 11}, {offset, 0}]},
            mk_row(<<"1">>, <<"1-08d53a5760b95fce6df2e2c5b008be39">>),
            mk_row(<<"10">>, <<"1-a05b6ea2bc0243949f103d5b4f15f71e">>),
            mk_row(<<"2">>, <<"1-b57c77a9e6f7574ca6469f0d6dcd78bb">>),
            mk_row(<<"3">>, <<"1-7fbf84d56f8017880974402d60f5acd6">>),
            mk_row(<<"4">>, <<"1-fcaf5852c08ffb239ac8ce16c409f253">>),
            mk_row(<<"5">>, <<"1-aaac5d460fd40f9286e57b9bf12e23d2">>),
            mk_row(<<"6">>, <<"1-aca21c2e7bc5f8951424fcfc5d1209d8">>),
            mk_row(<<"7">>, <<"1-4374aeec17590d82f16e70f318116ad9">>),
            mk_row(<<"8">>, <<"1-55b9a29311341e07ec0a7ca13bc1b59f">>),
            mk_row(<<"9">>, <<"1-558c8487d9aee25399a91b5d31d90fe2">>),
            mk_row(<<"_design/bar">>, <<"1-a44e1dd1994a7717bf89c894ebd1f081">>)
        ]},
    ?_assertEqual(Expect, Result).

should_query_with_range(Db) ->
    Result = run_query(Db, [{start_key, <<"3">>}, {end_key, <<"5">>}]),
    Expect =
        {ok, [
            {meta, [{total, 11}, {offset, 3}]},
            mk_row(<<"3">>, <<"1-7fbf84d56f8017880974402d60f5acd6">>),
            mk_row(<<"4">>, <<"1-fcaf5852c08ffb239ac8ce16c409f253">>),
            mk_row(<<"5">>, <<"1-aaac5d460fd40f9286e57b9bf12e23d2">>)
        ]},
    ?_assertEqual(Expect, Result).

raise_error_query_with_range_and_keys(Db) ->
    ?_assertThrow(
        {query_parse_error, <<"`key(s)` is incompatible with `start_key` and `end_key`">>},
        run_query(Db, [{keys, [<<"1">>]}, {start_key, <<"5">>}])
    ).

should_query_with_range_rev(Db) ->
    Result = run_query(Db, [
        {direction, rev},
        {start_key, <<"5">>},
        {end_key, <<"3">>},
        {inclusive_end, true}
    ]),
    Expect =
        {ok, [
            {meta, [{total, 11}, {offset, 5}]},
            mk_row(<<"5">>, <<"1-aaac5d460fd40f9286e57b9bf12e23d2">>),
            mk_row(<<"4">>, <<"1-fcaf5852c08ffb239ac8ce16c409f253">>),
            mk_row(<<"3">>, <<"1-7fbf84d56f8017880974402d60f5acd6">>)
        ]},
    ?_assertEqual(Expect, Result).

should_query_with_limit_and_skip(Db) ->
    Result = run_query(Db, [
        {start_key, <<"2">>},
        {limit, 3},
        {skip, 3}
    ]),
    Expect =
        {ok, [
            {meta, [{total, 11}, {offset, 5}]},
            mk_row(<<"5">>, <<"1-aaac5d460fd40f9286e57b9bf12e23d2">>),
            mk_row(<<"6">>, <<"1-aca21c2e7bc5f8951424fcfc5d1209d8">>),
            mk_row(<<"7">>, <<"1-4374aeec17590d82f16e70f318116ad9">>)
        ]},
    ?_assertEqual(Expect, Result).

should_query_with_include_docs(Db) ->
    Result = run_query(Db, [
        {start_key, <<"8">>},
        {end_key, <<"8">>},
        {include_docs, true}
    ]),
    Doc =
        {[
            {<<"_id">>, <<"8">>},
            {<<"_rev">>, <<"1-55b9a29311341e07ec0a7ca13bc1b59f">>},
            {<<"val">>, 8}
        ]},
    Val = {[{rev, <<"1-55b9a29311341e07ec0a7ca13bc1b59f">>}]},
    Expect =
        {ok, [
            {meta, [{total, 11}, {offset, 8}]},
            {row, [{id, <<"8">>}, {key, <<"8">>}, {value, Val}, {doc, Doc}]}
        ]},
    ?_assertEqual(Expect, Result).

should_query_empty_views(Db) ->
    Result = couch_mrview:query_view(Db, <<"_design/bar">>, <<"bing">>),
    Expect =
        {ok, [
            {meta, [{total, 0}, {offset, 0}]}
        ]},
    ?_assertEqual(Expect, Result).

mk_row(Id, Rev) ->
    {row, [{id, Id}, {key, Id}, {value, {[{rev, Rev}]}}]}.

run_query(Db, Opts) ->
    couch_mrview:query_all_docs(Db, Opts).