-module(pgsql_tests).

-export([run_tests/0]).

-include_lib("eunit/include/eunit.hrl").
-include("pgsql.hrl").

-define(host, "localhost").

connect_test() ->
    connect_only([[]]).

connect_to_db_test() ->
    connect_only([[{database, "epgsql_test_db1"}]]).

connect_as_test() ->
    connect_only(["epgsql_test1", [{database, "epgsql_test_db1"}]]).

connect_with_cleartext_test() ->
    connect_only(["epgsql_test_cleartext",
                  "epgsql_test_cleartext",
                  [{database, "epgsql_test_db1"}]]).

connect_with_md5_test() ->
    connect_only(["epgsql_test_md5",
                  "epgsql_test_md5",
                  [{database, "epgsql_test_db1"}]]).

connect_with_invalid_password_test() ->
    {error, invalid_authorization_specification} =
        pgsql:connect(?host,
                      "epgsql_test_md5",
                      "epgsql_test_sha1",
                      [{database, "epgsql_test_db1"}]).

select_test() ->
    with_connection(
      fun(C) ->
              {ok, Cols, Rows} = pgsql:squery(C, "select * from test_table1"),
              [#column{name = <<"id">>, type = int4, size = 4},
               #column{name = <<"value">>, type = text, size = -1}] = Cols,
              [{<<"1">>, <<"one">>}, {<<"2">>, <<"two">>}] = Rows
      end).

insert_test() ->
    with_rollback(
      fun(C) ->
              {ok, 1} = pgsql:squery(C, "insert into test_table1 (id, value) values (3, 'three')")
      end).

update_test() ->
    with_rollback(
      fun(C) ->
              {ok, 1} = pgsql:squery(C, "insert into test_table1 (id, value) values (3, 'three')"),
              {ok, 1} = pgsql:squery(C, "insert into test_table1 (id, value) values (4, 'four')"),
              {ok, 2} = pgsql:squery(C, "update test_table1 set value = 'foo' where id > 2"),
              {ok, _, [{<<"2">>}]} = pgsql:squery(C, "select count(*) from test_table1 where value = 'foo'")
      end).

delete_test() ->
    with_rollback(
      fun(C) ->
              {ok, 1} = pgsql:squery(C, "insert into test_table1 (id, value) values (3, 'three')"),
              {ok, 1} = pgsql:squery(C, "insert into test_table1 (id, value) values (4, 'four')"),
              {ok, 2} = pgsql:squery(C, "delete from test_table1 where id > 2"),
              {ok, _, [{<<"2">>}]} = pgsql:squery(C, "select count(*) from test_table1")
      end).

create_and_drop_table_test() ->
    with_rollback(
      fun(C) ->
              {ok, [], []} = pgsql:squery(C, "create table test_table3 (id int4)"),
              {ok, [#column{type = int4}], []} = pgsql:squery(C, "select * from test_table3"),
              {ok, [], []} = pgsql:squery(C, "drop table test_table3")
      end).

cursor_test() ->
    with_connection(
      fun(C) ->
              {ok, [], []} = pgsql:squery(C, "begin"),
              {ok, [], []} = pgsql:squery(C, "declare c cursor for select id from test_table1"),
              {ok, 2} = pgsql:squery(C, "move forward 2 from c"),
              {ok, 1} = pgsql:squery(C, "move backward 1 from c"),
              {ok, 1, _Cols, [{<<"2">>}]} = pgsql:squery(C, "fetch next from c"),
              {ok, [], []} = pgsql:squery(C, "close c")
      end).

multiple_result_test() ->
    with_connection(
      fun(C) ->
              [{ok, _, [{<<"1">>}]}, {ok, _, [{<<"2">>}]}] = pgsql:squery(C, "select 1; select 2"),
              [{ok, _, [{<<"1">>}]}, {error, #error{}}] = pgsql:squery(C, "select 1; select foo;")
      end).

extended_select_test() ->
    with_connection(
      fun(C) ->
              {ok, Cols, Rows} = pgsql:equery(C, "select * from test_table1", []),
              [#column{name = <<"id">>, type = int4, size = 4},
               #column{name = <<"value">>, type = text, size = -1}] = Cols,
              [{1, <<"one">>}, {2, <<"two">>}] = Rows
      end).

extended_sync_ok_test() ->
    with_connection(
      fun(C) ->
              {ok, _Cols, [{<<"one">>}]} = pgsql:equery(C, "select value from test_table1 where id = $1", [1]),
              {ok, _Cols, [{<<"two">>}]} = pgsql:equery(C, "select value from test_table1 where id = $1", [2])
      end).

extended_sync_error_test() ->
    with_connection(
      fun(C) ->
              {error, #error{}} = pgsql:equery(C, "select _alue from test_table1 where id = $1", [1]),
              {ok, _Cols, [{<<"one">>}]} = pgsql:equery(C, "select value from test_table1 where id = $1", [1])
      end).

returning_from_insert_test() ->
    with_rollback(
      fun(C) ->
              {ok, 1, _Cols, [{3}]} = pgsql:equery(C, "insert into test_table1 (id) values (3) returning id")
      end).

returning_from_update_test() ->
    with_rollback(
      fun(C) ->
              {ok, 2, _Cols, [{1}, {2}]} = pgsql:equery(C, "update test_table1 set value = 'hi' returning id")
      end).

returning_from_delete_test() ->
    with_rollback(
      fun(C) ->
              {ok, 2, _Cols, [{1}, {2}]} = pgsql:equery(C, "delete from test_table1 returning id")
      end).

parse_test() ->
    with_connection(
      fun(C) ->
              {ok, S} = pgsql:parse(C, "select * from test_table1"),
              [#column{name = <<"id">>}, #column{name = <<"value">>}] = S#statement.columns,
              ok = pgsql:close(C, S),
              ok = pgsql:sync(C)
      end).

parse_column_format_test() ->
    with_connection(
      fun(C) ->
              {ok, S} = pgsql:parse(C, "select 1::int4, false::bool, 2.0::float4"),
              [#column{type = int4},
               #column{type = bool},
               #column{type = float4}] = S#statement.columns,
              ok = pgsql:bind(C, S, []),
              {ok, [{1, false, 2.0}]} = pgsql:execute(C, S, 0),
              ok = pgsql:close(C, S),
              ok = pgsql:sync(C)
      end).

parse_error_test() ->
    with_connection(
      fun(C) ->
              {error, #error{}} = pgsql:parse(C, "select _ from test_table1"),
              {ok, S} = pgsql:parse(C, "select * from test_table1"),
              [#column{name = <<"id">>}, #column{name = <<"value">>}] = S#statement.columns,
              ok = pgsql:close(C, S),
              ok = pgsql:sync(C)
      end).

parse_and_close_test() ->
    with_connection(
      fun(C) ->
              Parse = fun() -> pgsql:parse(C, "test", "select * from test_table1", []) end,
              {ok, S} = Parse(),
              {error, #error{code = <<"42P05">>}} = Parse(),
              pgsql:close(C, S),
              {ok, S} = Parse(),
              ok = pgsql:sync(C)
      end).

bind_test() ->
    with_connection(
      fun(C) ->
              {ok, S} = pgsql:parse(C, "select value from test_table1 where id = $1"),
              ok = pgsql:bind(C, S, [1]),
              ok = pgsql:close(C, S),
              ok = pgsql:sync(C)
      end).

bind_parameter_format_test() ->
    with_connection(
      fun(C) ->
              {ok, S} = pgsql:parse(C, "select $1, $2, $3", [int2, text, bool]),
              [int2, text, bool] = S#statement.types,
              ok = pgsql:bind(C, S, [1, "hi", true]),
              {ok, [{1, <<"hi">>, true}]} = pgsql:execute(C, S, 0),
              ok = pgsql:close(C, S),
              ok = pgsql:sync(C)
      end).

bind_error_test() ->
    with_connection(
      fun(C) ->
              {ok, S} = pgsql:parse(C, "select $1::char"),
              {error, #error{}} = pgsql:bind(C, S, [0]),
              ok = pgsql:bind(C, S, [$A]),
              ok = pgsql:close(C, S),
              ok = pgsql:sync(C)
      end).

bind_and_close_test() ->
    with_connection(
      fun(C) ->
              {ok, S} = pgsql:parse(C, "select * from test_table1"),
              ok = pgsql:bind(C, S, "one", []),
              {error, #error{code = <<"42P03">>}} = pgsql:bind(C, S, "one", []),
              ok = pgsql:close(C, portal, "one"),
              ok = pgsql:bind(C, S, "one", []),
              ok = pgsql:sync(C)
      end).

describe_test() ->
    with_connection(
      fun(C) ->
              {ok, S} = pgsql:parse(C, "select * from test_table1"),
              [#column{name = <<"id">>}, #column{name = <<"value">>}] = S#statement.columns,
              {ok, S} = pgsql:describe(C, S),
              ok = pgsql:close(C, S),
              ok = pgsql:sync(C)
      end).

describe_with_param_test() ->
    with_connection(
      fun(C) ->
              {ok, S} = pgsql:parse(C, "select id from test_table1 where id = $1"),
              [int4] = S#statement.types,
              [#column{name = <<"id">>}] = S#statement.columns,
              {ok, S} = pgsql:describe(C, S),
              ok = pgsql:close(C, S),
              ok = pgsql:sync(C)
      end).

describe_named_test() ->
    with_connection(
      fun(C) ->
              {ok, S} = pgsql:parse(C, "name", "select * from test_table1", []),
              [#column{name = <<"id">>}, #column{name = <<"value">>}] = S#statement.columns,
              {ok, S} = pgsql:describe(C, S),
              ok = pgsql:close(C, S),
              ok = pgsql:sync(C)
      end).

describe_error_test() ->
    with_connection(
      fun(C) ->
              {error, #error{}} = pgsql:describe(C, statement, ""),
              {ok, S} = pgsql:parse(C, "select * from test_table1"),
              {ok, S} = pgsql:describe(C, statement, ""),
              ok = pgsql:sync(C)

      end).

portal_test() ->
    with_connection(
      fun(C) ->
              {ok, S} = pgsql:parse(C, "select value from test_table1"),
              ok = pgsql:bind(C, S, []),
              {partial, [{<<"one">>}]} = pgsql:execute(C, S, 1),
              {partial, [{<<"two">>}]} = pgsql:execute(C, S, 1),
              {ok, []} = pgsql:execute(C, S,1),
              ok = pgsql:close(C, S),
              ok = pgsql:sync(C)
      end).

returning_test() ->
    with_rollback(
      fun(C) ->
              {ok, S} = pgsql:parse(C, "update test_table1 set value = $1 returning id"),
              ok = pgsql:bind(C, S, ["foo"]),
              {ok, 2, [{1}, {2}]} = pgsql:execute(C, S),
              ok = pgsql:sync(C)
      end).

multiple_statement_test() ->
    with_connection(
      fun(C) ->
              {ok, S1} = pgsql:parse(C, "one", "select value from test_table1 where id = 1", []),
              ok = pgsql:bind(C, S1, []),
              {partial, [{<<"one">>}]} = pgsql:execute(C, S1, 1),
              {ok, S2} = pgsql:parse(C, "two", "select value from test_table1 where id = 2", []),
              ok = pgsql:bind(C, S2, []),
              {partial, [{<<"two">>}]} = pgsql:execute(C, S2, 1),
              {ok, []} = pgsql:execute(C, S1, 1),
              {ok, []} = pgsql:execute(C, S2, 1),
              ok = pgsql:close(C, S1),
              ok = pgsql:close(C, S2),
              ok = pgsql:sync(C)
      end).

multiple_portal_test() ->
    with_connection(
      fun(C) ->
              {ok, S} = pgsql:parse(C, "select value from test_table1 where id = $1"),
              ok = pgsql:bind(C, S, "one", [1]),
              ok = pgsql:bind(C, S, "two", [2]),
              {ok, [{<<"one">>}]} = pgsql:execute(C, S, "one", 0),
              {ok, [{<<"two">>}]} = pgsql:execute(C, S, "two", 0),
              ok = pgsql:close(C, S),
              ok = pgsql:sync(C)
      end).

execute_function_test() ->
    with_rollback(
      fun(C) ->
              {ok, _Cols1, [{3}]} = pgsql:equery(C, "select insert_test1(3, 'three')"),
              {ok, _Cols2, [{<<>>}]} = pgsql:equery(C, "select do_nothing()")
      end).

parameter_get_test() ->
    with_connection(
      fun(C) ->
              {ok, <<"off">>} = pgsql:get_parameter(C, "integer_datetimes")
      end).

parameter_set_test() ->
    with_connection(
      fun(C) ->
              {ok, [], []} = pgsql:squery(C, "set DateStyle = 'ISO, MDY'"),
              {ok, <<"ISO, MDY">>} = pgsql:get_parameter(C, "DateStyle"),
              {ok, _Cols, [{<<"2000-01-02">>}]} = pgsql:squery(C, "select '2000-01-02'::date"),
              {ok, [], []} = pgsql:squery(C, "set DateStyle = 'German'"),
              {ok, <<"German, DMY">>} = pgsql:get_parameter(C, "DateStyle"),
              {ok, _Cols, [{<<"02.01.2000">>}]} = pgsql:squery(C, "select '2000-01-02'::date")
      end).

type_test() ->
    check_type(bool, "true", true, [true, false]),
    check_type(bpchar, "'A'", $A, [1, $1, 255], "c_char"),
    check_type(int2, "1", 1, [0, 256, -32768, +32767]),
    check_type(int4, "1", 1, [0, 512, -2147483648, +2147483647]),
    check_type(int8, "1", 1, [0, 1024, -9223372036854775808, +9223372036854775807]),
    check_type(float4, "1.0", 1.0, [0.0, 1.23456, -1.23456]),
    check_type(float8, "1.0", 1.0, [0.0, 1.23456789012345, -1.23456789012345]),
    check_type(bytea, "E'\001\002'", <<1,2>>, [<<>>, <<0,128,255>>]),
    check_type(text, "'hi'", <<"hi">>, [<<"">>, <<"hi">>]),
    check_type(varchar, "'hi'", <<"hi">>, [<<"">>, <<"hi">>]),
    check_type(date, "'2008-01-02'", {2008,1,2}, [{-4712,1,1}, {5874897,1,1}]),
    check_type(time, "'00:01:02'", {0,1,2.0}, [{0,0,0.0}, {24,0,0.0}]),
    check_type(timetz, "'00:01:02-01'", {{0,1,2.0},1*60*60}, [{{0,0,0.0},0}, {{24,0,0.0},-13*60*60}]),
    check_type(timestamp, "'2008-01-02 03:04:05'", {{2008,1,2},{3,4,5.0}},
               [{{-4712,1,1},{0,0,0.0}}, {{5874897,12,31}, {23,59,59.0}}]),
    check_type(interval, "'1 hour 2 minutes 3.1 seconds'", {{1,2,3.1},0,0},
               [{{0,0,0.0},0,-178000000 * 12}, {{0,0,0.0},0,178000000 * 12}]).

text_format_test() ->
    with_connection(
      fun(C) ->
              Select = fun(Type, V) ->
                               V2 = list_to_binary(V),
                               Query = "select $1::" ++ Type,
                               {ok, _Cols, [{V2}]} = pgsql:equery(C, Query, [V]),
                               {ok, _Cols, [{V2}]} = pgsql:equery(C, Query, [V2])
                       end,
              Select("inet", "127.0.0.1"),
              Select("numeric", "123456")
      end).

%% -- run all tests --

run_tests() ->
    Files = filelib:wildcard("test_ebin/*tests.beam"),
    Mods = [list_to_atom(filename:basename(F, ".beam")) || F <- Files],
    eunit:test(Mods, []).

%% -- internal functions --

connect_only(Args) ->
    {ok, C} = apply(pgsql, connect, [?host | Args]),
    pgsql:close(C),
    flush().

with_connection(F) ->
    {ok, C} = pgsql:connect(?host, "epgsql_test1", [{database, "epgsql_test_db1"}]),
    try
        F(C)
    after
        pgsql:close(C)
    end,
    flush().


with_rollback(F) ->
    with_connection(
      fun(C) ->
              try
                  pgsql:squery(C, "begin"),
                  F(C)
                  after
                      pgsql:squery(C, "rollback")
                  end
      end).

check_type(Type, In, Out, Values) ->
    Column = "c_" ++ atom_to_list(Type),
    check_type(Type, In, Out, Values, Column).

check_type(Type, In, Out, Values, Column) ->
    with_connection(
      fun(C) ->
              Select = io_lib:format("select ~s::~w", [In, Type]),
              {ok, [#column{type = Type}], [{Out}]} = pgsql:equery(C, Select),
              Sql = io_lib:format("insert into test_table2 (~s) values ($1) returning ~s", [Column, Column]),
              {ok, #statement{columns = [#column{type = Type}]} = S} = pgsql:parse(C, Sql),
              Insert = fun(V) ->
                               pgsql:bind(C, S, [V]),
                               {ok, 1, [{V2}]} = pgsql:execute(C, S),
                               case compare(Type, V, V2) of
                                   true  -> ok;
                                   false -> ?debugFmt("~p =/= ~p~n", [V, V2]), ?assert(false)
                               end,
                               ok = pgsql:sync(C)
                       end,
              lists:foreach(Insert, [null | Values])
      end).

compare(_Type, null, null) -> true;
compare(float4, V1, V2)    -> abs(V2 - V1) < 0.000001;
compare(float8, V1, V2)    -> abs(V2 - V1) < 0.000000000000001;
compare(_Type, V1, V2)     -> V1 =:= V2.

%% flush mailbox
flush() ->
    ?assertEqual([], flush([])).

flush(Acc) ->
    receive
        {'EXIT', _Pid, normal} -> flush(Acc);
        M                      -> flush([M | Acc])
    after
        0 -> lists:reverse(Acc)
    end.