# coding=UTF-8
from __future__ import print_function

import pytest
import psycopg2
from mock import patch
from pgcli.packages.parseutils.meta import FunctionMetadata
from textwrap import dedent
from utils import run, dbtest, requires_json, requires_jsonb
from pgcli.main import PGCli


def function_meta_data(
        func_name, schema_name='public', arg_names=None, arg_types=None,
        arg_modes=None, return_type=None, is_aggregate=False, is_window=False,
        is_set_returning=False, arg_defaults=None
):
    return FunctionMetadata(
        schema_name, func_name, arg_names, arg_types, arg_modes, return_type,
        is_aggregate, is_window, is_set_returning, arg_defaults
    )

@dbtest
def test_conn(executor):
    run(executor, '''create table test(a text)''')
    run(executor, '''insert into test values('abc')''')
    assert run(executor, '''select * from test''', join=True) == dedent("""\
        +-----+
        | a   |
        |-----|
        | abc |
        +-----+
        SELECT 1""")


@dbtest
def test_bools_are_treated_as_strings(executor):
    run(executor, '''create table test(a boolean)''')
    run(executor, '''insert into test values(True)''')
    assert run(executor, '''select * from test''', join=True) == dedent("""\
        +------+
        | a    |
        |------|
        | True |
        +------+
        SELECT 1""")


@dbtest
def test_schemata_table_views_and_columns_query(executor):
    run(executor, "create table a(x text, y text)")
    run(executor, "create table b(z text)")
    run(executor, "create view d as select 1 as e")
    run(executor, "create schema schema1")
    run(executor, "create table schema1.c (w text DEFAULT 'meow')")
    run(executor, "create schema schema2")

    # schemata
    # don't enforce all members of the schemas since they may include postgres
    # temporary schemas
    assert set(executor.schemata()) >= set([
        'public', 'pg_catalog', 'information_schema', 'schema1', 'schema2'])
    assert executor.search_path() == ['pg_catalog', 'public']

    # tables
    assert set(executor.tables()) >= set([
    ('public', 'a'), ('public', 'b'), ('schema1', 'c')])

    assert set(executor.table_columns()) >= set([
        ('public', 'a', 'x', 'text', False, None),
        ('public', 'a', 'y', 'text', False, None),
        ('public', 'b', 'z', 'text', False, None),
        ('schema1', 'c', 'w', 'text', True, "'meow'::text"),
    ])

    # views
    assert set(executor.views()) >= set([
        ('public', 'd')])

    assert set(executor.view_columns()) >= set([
        ('public', 'd', 'e', 'integer', False, None)])


@dbtest
def test_foreign_key_query(executor):
    run(executor, "create schema schema1")
    run(executor, "create schema schema2")
    run(executor, "create table schema1.parent(parentid int PRIMARY KEY)")
    run(executor, "create table schema2.child(childid int PRIMARY KEY, motherid int REFERENCES schema1.parent)")

    assert set(executor.foreignkeys()) >= set([
        ('schema1', 'parent', 'parentid', 'schema2', 'child', 'motherid')])


@dbtest
def test_functions_query(executor):
    run(executor, '''create function func1() returns int
                     language sql as $$select 1$$''')
    run(executor, 'create schema schema1')
    run(executor, '''create function schema1.func2() returns int
                     language sql as $$select 2$$''')

    run(executor, '''create function func3()
                     returns table(x int, y int) language sql
                     as $$select 1, 2 from generate_series(1,5)$$;''')

    run(executor, '''create function func4(x int) returns setof int language sql
                     as $$select generate_series(1,5)$$;''')

    funcs = set(executor.functions())
    assert funcs >= set([
        function_meta_data(
            func_name='func1',
            return_type='integer'
        ),
        function_meta_data(
            func_name='func3',
            arg_names=['x', 'y'],
            arg_types=['integer', 'integer'],
            arg_modes=['t', 't'],
            return_type='record',
            is_set_returning=True
        ),
        function_meta_data(
            schema_name='public',
            func_name='func4',
            arg_names=('x',),
            arg_types=('integer',),
            return_type='integer',
            is_set_returning=True
        ),
        function_meta_data(
            schema_name='schema1',
            func_name='func2',
            return_type='integer'
        ),
    ])


@dbtest
def test_datatypes_query(executor):
    run(executor, 'create type foo AS (a int, b text)')

    types = list(executor.datatypes())
    assert types == [('public', 'foo')]


@dbtest
def test_database_list(executor):
    databases = executor.databases()
    assert '_test_db' in databases


@dbtest
def test_invalid_syntax(executor, exception_formatter):
    result = run(executor, 'invalid syntax!',
                 exception_formatter=exception_formatter)
    assert 'syntax error at or near "invalid"' in result[0]


@dbtest
def test_invalid_column_name(executor, exception_formatter):
    result = run(executor, 'select invalid command',
                 exception_formatter=exception_formatter)
    assert 'column "invalid" does not exist' in result[0]


@pytest.fixture(params=[True, False])
def expanded(request):
    return request.param


@dbtest
def test_unicode_support_in_output(executor, expanded):
    run(executor, "create table unicodechars(t text)")
    run(executor, u"insert into unicodechars (t) values ('é')")

    # See issue #24, this raises an exception without proper handling
    assert u'é' in run(executor, "select * from unicodechars",
                       join=True, expanded=expanded)


@dbtest
def test_not_is_special(executor, pgspecial):
    """is_special is set to false for database queries."""
    query = 'select 1'
    result = list(executor.run(query, pgspecial=pgspecial))
    success, is_special = result[0][5:]
    assert success == True
    assert is_special == False


@dbtest
def test_execute_from_file_no_arg(executor, pgspecial):
    """\i without a filename returns an error."""
    result = list(executor.run("\i", pgspecial=pgspecial))
    status, sql, success, is_special = result[0][3:]
    assert 'missing required argument' in status
    assert success == False
    assert is_special == True


@dbtest
@patch('pgcli.main.os')
def test_execute_from_file_io_error(os, executor, pgspecial):
    """\i with an io_error returns an error."""
    # Inject an IOError.
    os.path.expanduser.side_effect = IOError('test')

    # Check the result.
    result = list(executor.run("\i test", pgspecial=pgspecial))
    status, sql, success, is_special = result[0][3:]
    assert status == 'test'
    assert success == False
    assert is_special == True


@dbtest
def test_multiple_queries_same_line(executor):
    result = run(executor, "select 'foo'; select 'bar'")
    assert len(result) == 12  # 2 * (output+status) * 3 lines
    assert "foo" in result[3]
    assert "bar" in result[9]


@dbtest
def test_multiple_queries_with_special_command_same_line(executor, pgspecial):
    result = run(executor, "select 'foo'; \d", pgspecial=pgspecial)
    assert len(result) == 11  # 2 * (output+status) * 3 lines
    assert "foo" in result[3]
    # This is a lame check. :(
    assert "Schema" in result[7]


@dbtest
def test_multiple_queries_same_line_syntaxerror(executor, exception_formatter):
    result = run(executor, u"select 'fooé'; invalid syntax é",
                 exception_formatter=exception_formatter)
    assert u'fooé' in result[3]
    assert 'syntax error at or near "invalid"' in result[-1]


@pytest.fixture
def pgspecial():
    return PGCli().pgspecial


@dbtest
def test_special_command_help(executor, pgspecial):
    result = run(executor, '\\?', pgspecial=pgspecial)[1].split('|')
    assert u'Command' in result[1]
    assert u'Description' in result[2]


@dbtest
def test_bytea_field_support_in_output(executor):
    run(executor, "create table binarydata(c bytea)")
    run(executor,
        "insert into binarydata (c) values (decode('DEADBEEF', 'hex'))")

    assert u'\\xdeadbeef' in run(executor, "select * from binarydata", join=True)


@dbtest
def test_unicode_support_in_unknown_type(executor):
    assert u'日本語' in run(executor, u"SELECT '日本語' AS japanese;", join=True)


@dbtest
def test_unicode_support_in_enum_type(executor):
    run(executor, u"CREATE TYPE mood AS ENUM ('sad', 'ok', 'happy', '日本語')")
    run(executor, u"CREATE TABLE person (name TEXT, current_mood mood)")
    run(executor, u"INSERT INTO person VALUES ('Moe', '日本語')")
    assert u'日本語' in run(executor, u"SELECT * FROM person", join=True)


@requires_json
def test_json_renders_without_u_prefix(executor, expanded):
    run(executor, u"create table jsontest(d json)")
    run(executor, u"""insert into jsontest (d) values ('{"name": "Éowyn"}')""")
    result = run(executor, u"SELECT d FROM jsontest LIMIT 1",
                 join=True, expanded=expanded)

    assert u'{"name": "Éowyn"}' in result


@requires_jsonb
def test_jsonb_renders_without_u_prefix(executor, expanded):
    run(executor, "create table jsonbtest(d jsonb)")
    run(executor, u"""insert into jsonbtest (d) values ('{"name": "Éowyn"}')""")
    result = run(executor, "SELECT d FROM jsonbtest LIMIT 1",
                 join=True, expanded=expanded)

    assert u'{"name": "Éowyn"}' in result


@dbtest
def test_date_time_types(executor):
    run(executor, "SET TIME ZONE UTC")
    assert run(executor, "SELECT (CAST('00:00:00' AS time))", join=True).split("\n")[3] \
         == "| 00:00:00 |"
    assert run(executor, "SELECT (CAST('00:00:00+14:59' AS timetz))", join=True).split("\n")[3]  \
        == "| 00:00:00+14:59 |"
    assert run(executor, "SELECT (CAST('4713-01-01 BC' AS date))", join=True).split("\n")[3] \
         == "| 4713-01-01 BC |"
    assert run(executor, "SELECT (CAST('4713-01-01 00:00:00 BC' AS timestamp))", join=True).split("\n")[3] \
         == "| 4713-01-01 00:00:00 BC |"
    assert run(executor, "SELECT (CAST('4713-01-01 00:00:00+00 BC' AS timestamptz))", join=True).split("\n")[3] \
         == "| 4713-01-01 00:00:00+00 BC |"
    assert run(executor, "SELECT (CAST('-123456789 days 12:23:56' AS interval))", join=True).split("\n")[3] \
         == "| -123456789 days, 12:23:56 |"


@dbtest
@pytest.mark.parametrize('value', ['10000000', '10000000.0', '10000000000000'])
def test_large_numbers_render_directly(executor, value):
    run(executor, "create table numbertest(a numeric)")
    run(executor,
        "insert into numbertest (a) values ({0})".format(value))
    assert value in run(executor, "select * from numbertest", join=True)


@dbtest
@pytest.mark.parametrize('command', ['di', 'dv', 'ds', 'df', 'dT'])
@pytest.mark.parametrize('verbose', ['', '+'])
@pytest.mark.parametrize('pattern', ['', 'x', '*.*', 'x.y', 'x.*', '*.y'])
def test_describe_special(executor, command, verbose, pattern, pgspecial):
    # We don't have any tests for the output of any of the special commands,
    # but we can at least make sure they run without error
    sql = r'\{command}{verbose} {pattern}'.format(**locals())
    list(executor.run(sql, pgspecial=pgspecial))


@dbtest
@pytest.mark.parametrize('sql', [
    'invalid sql',
    'SELECT 1; select error;',
])
def test_raises_with_no_formatter(executor, sql):
    with pytest.raises(psycopg2.ProgrammingError):
        list(executor.run(sql))


@dbtest
def test_on_error_resume(executor, exception_formatter):
    sql = 'select 1; error; select 1;'
    result = list(executor.run(sql, on_error_resume=True,
                               exception_formatter=exception_formatter))
    assert len(result) == 3


@dbtest
def test_on_error_stop(executor, exception_formatter):
    sql = 'select 1; error; select 1;'
    result = list(executor.run(sql, on_error_resume=False,
                               exception_formatter=exception_formatter))
    assert len(result) == 2

# @dbtest
# def test_unicode_notices(executor):
#     sql = "DO language plpgsql $$ BEGIN RAISE NOTICE '有人更改'; END $$;"
#     result = list(executor.run(sql))
#     assert result[0][0] == u'NOTICE:  有人更改\n'


@dbtest
def test_nonexistent_function_definition(executor):
    with pytest.raises(RuntimeError):
        result = executor.view_definition('there_is_no_such_function')


@dbtest
def test_function_definition(executor):
    run(executor, '''
            CREATE OR REPLACE FUNCTION public.the_number_three()
            RETURNS int
            LANGUAGE sql
            AS $function$
              select 3;
            $function$
    ''')
    result = executor.function_definition('the_number_three')


@dbtest
def test_view_definition(executor):
    run(executor, 'create table tbl1 (a text, b numeric)')
    run(executor, 'create view vw1 AS SELECT * FROM tbl1')
    run(executor, 'create materialized view mvw1 AS SELECT * FROM tbl1')
    result = executor.view_definition('vw1')
    assert 'FROM tbl1' in result
    # import pytest; pytest.set_trace()
    result = executor.view_definition('mvw1')
    assert 'MATERIALIZED VIEW' in result


@dbtest
def test_nonexistent_view_definition(executor):
    with pytest.raises(RuntimeError):
        result = executor.view_definition('there_is_no_such_view')
    with pytest.raises(RuntimeError):
        result = executor.view_definition('mvw1')