# -*- coding: utf-8 -*-
"""Test operator classes"""

import pytest

from pyrseas.testutils import DatabaseToMapTestCase
from pyrseas.testutils import InputMapToSqlTestCase, fix_indent

CREATE_TYPE_STMT = """
CREATE TYPE myint;
CREATE FUNCTION myintin(cstring) RETURNS myint AS 'int4in' LANGUAGE internal;
CREATE FUNCTION myintout(myint) RETURNS cstring AS 'int4out' LANGUAGE internal;
CREATE TYPE myint (INPUT = myintin, OUTPUT = myintout);
CREATE FUNCTION myinteq(myint,myint) RETURNS boolean AS 'int4eq'
       LANGUAGE internal;
CREATE FUNCTION myintlt(myint,myint) RETURNS boolean AS 'int4lt'
       LANGUAGE internal;
CREATE OPERATOR < (PROCEDURE = myintlt, LEFTARG = myint, RIGHTARG = myint);
CREATE OPERATOR = (PROCEDURE = myinteq, LEFTARG = myint, RIGHTARG = myint);
CREATE FUNCTION btmyintcmp(myint,myint) RETURNS integer AS 'btint4cmp'
       LANGUAGE internal;
"""

CREATE_STMT = "CREATE OPERATOR CLASS oc1 FOR TYPE integer USING btree " \
    "AS OPERATOR 1 <, OPERATOR 3 =, FUNCTION 1 btint4cmp(integer,integer)"
CREATE_STMT_LONG = "CREATE OPERATOR CLASS sd.oc1 FOR TYPE integer " \
    "USING btree AS OPERATOR 1 <(integer,integer), " \
    "OPERATOR 3 =(integer,integer), FUNCTION 1 btint4cmp(integer,integer)"
COMMENT_STMT = "COMMENT ON OPERATOR CLASS sd.oc1 USING btree IS " \
    "'Test operator class oc1'"


class OperatorClassToMapTestCase(DatabaseToMapTestCase):
    """Test mapping of existing operator classes"""

    superuser = True

    def test_map_operclass1(self):
        "Map an operator class"
        dbmap = self.to_map([CREATE_STMT])
        assert dbmap['schema sd']['operator class oc1 using btree'] == \
            {'type': 'integer',
             'operators': {1: '<(integer,integer)', 3: '=(integer,integer)'},
             'functions': {1: 'btint4cmp(integer,integer)'}}

    def test_map_operclass_default(self):
        "Map a default operator class"
        stmts = [CREATE_TYPE_STMT,
                 "CREATE OPERATOR CLASS oc1 DEFAULT FOR TYPE sd.myint "
                 "USING btree AS OPERATOR 1 <, OPERATOR 3 =, "
                 "FUNCTION 1 btmyintcmp(sd.myint,sd.myint)"]
        dbmap = self.to_map(stmts)
        assert dbmap['schema sd']['operator class oc1 using btree'] == \
            {'type': 'myint', 'default': True,
             'operators': {1: 'sd.<(sd.myint,sd.myint)',
                           3: 'sd.=(sd.myint,sd.myint)'},
             'functions': {1: 'sd.btmyintcmp(sd.myint,sd.myint)'}}

    def test_map_operclass_comment(self):
        "Map an operator class comment"
        dbmap = self.to_map([CREATE_STMT, COMMENT_STMT])
        assert dbmap['schema sd']['operator class oc1 using btree'][
            'description'] == 'Test operator class oc1'


class OperatorClassToSqlTestCase(InputMapToSqlTestCase):
    """Test SQL generation from input operators"""

    @pytest.mark.xfail
    def test_create_operclass1(self):
        "Create an operator class"
        inmap = self.std_map()
        inmap['schema sd'].update({'operator class oc1 using btree': {
            'type': 'integer',
            'operators': {1: '<(integer,integer)', 3: '=(integer,integer)'},
            'functions': {1: 'btint4cmp(integer,integer)'}}})
        sql = self.to_sql(inmap)
        assert fix_indent(sql[0]) == CREATE_STMT_LONG

    def test_create_operclass_default(self):
        "Create a default operator class"
        inmap = self.std_map()
        inmap['schema sd'].update({'operator class oc1 using btree': {
            'default': True, 'type': 'myint',
            'operators': {1: 'sd.<(sd.myint,sd.myint)',
                          3: 'sd.=(sd.myint,sd.myint)'},
            'functions': {1: 'sd.btmyintcmp(sd.myint,sd.myint)'}}})
        sql = self.to_sql(inmap, [CREATE_TYPE_STMT], superuser=True)
        assert fix_indent(sql[0]) == "CREATE OPERATOR CLASS sd.oc1 DEFAULT " \
            "FOR TYPE sd.myint USING btree AS OPERATOR 1 " \
            "sd.<(sd.myint,sd.myint), OPERATOR 3 sd.=(sd.myint,sd.myint), "\
            "FUNCTION 1 sd.btmyintcmp(sd.myint,sd.myint)"

    @pytest.mark.xfail
    def test_create_operclass_in_schema(self):
        "Create a operator within a non-default schema"
        inmap = self.std_map()
        inmap.update({'schema s1': {'operator class oc1 using btree': {
            'type': 'integer',
            'operators': {1: '<(integer,integer)', 3: '=(integer,integer)'},
            'functions': {1: 'btint4cmp(integer,integer)'}}}})
        sql = self.to_sql(inmap, ["CREATE SCHEMA s1"])
        assert fix_indent(sql[0]) == "CREATE OPERATOR CLASS s1.oc1 FOR " \
            "TYPE integer USING btree AS OPERATOR 1 <(integer,integer), " \
            "OPERATOR 3 =(integer,integer), " \
            "FUNCTION 1 btint4cmp(integer,integer)"

    def test_drop_operclass(self):
        "Drop an existing operator"
        sql = self.to_sql(self.std_map(), [CREATE_STMT], superuser=True)
        assert sql == ["DROP OPERATOR CLASS sd.oc1 USING btree",
                       "DROP OPERATOR FAMILY sd.oc1 USING btree"]

    @pytest.mark.xfail
    def test_operclass_with_comment(self):
        "Create an operator class with a comment"
        inmap = self.std_map()
        inmap['schema sd'].update({'operator class oc1 using btree': {
            'description': 'Test operator class oc1', 'type': 'integer',
            'operators': {1: '<(integer,integer)', 3: '=(integer,integer)'},
            'functions': {1: 'btint4cmp(integer,integer)'}}})
        sql = self.to_sql(inmap)
        assert fix_indent(sql[0]) == CREATE_STMT_LONG
        assert sql[1] == COMMENT_STMT

    def test_comment_on_operclass(self):
        "Create a comment for an existing operator class"
        inmap = self.std_map()
        inmap['schema sd'].update({'operator class oc1 using btree': {
            'description': 'Test operator class oc1', 'type': 'integer',
            'operators': {1: '<(integer,integer)', 3: '=(integer,integer)'},
            'functions': {1: 'btint4cmp(integer,integer)'}},
            'operator family oc1 using btree': {}})
        sql = self.to_sql(inmap, [CREATE_STMT], superuser=True)
        assert sql == [COMMENT_STMT]

    def test_drop_operclass_comment(self):
        "Drop the existing comment on an operator class"
        stmts = [CREATE_STMT, COMMENT_STMT]
        inmap = self.std_map()
        inmap['schema sd'].update({'operator class oc1 using btree': {
            'type': 'integer',
            'operators': {1: '<(integer,integer)', 3: '=(integer,integer)'},
            'functions': {1: 'btint4cmp(integer,integer)'}},
            'operator family oc1 using btree': {}})
        sql = self.to_sql(inmap, stmts, superuser=True)
        assert sql == ["COMMENT ON OPERATOR CLASS sd.oc1 USING btree IS NULL"]

    def test_change_operclass_comment(self):
        "Change existing comment on an operator class"
        stmts = [CREATE_STMT, COMMENT_STMT]
        inmap = self.std_map()
        inmap['schema sd'].update({'operator class oc1 using btree': {
            'description': 'Changed operator class oc1', 'type': 'integer',
            'operators': {1: '<(integer,integer)', 3: '=(integer,integer)'},
            'functions': {1: 'btint4cmp(integer,integer)'}},
            'operator family oc1 using btree': {}})
        sql = self.to_sql(inmap, stmts, superuser=True)
        assert sql == ["COMMENT ON OPERATOR CLASS sd.oc1 USING btree IS "
                       "'Changed operator class oc1'"]