# Path: pgcli/packages/sqlcompletion.py
# class SqlStatement:
#     def __init__(self, full_text, text_before_cursor):
#     def is_insert(self):
#     def get_tables(self, scope="full"):
#     def get_previous_token(self, token):
#     def get_identifier_schema(self):
#     def reduce_to_prev_keyword(self, n_skip=0):
# def suggest_type(full_text, text_before_cursor):
# def _strip_named_query(txt):
# def _find_function_body(text):
# def _statement_from_function(full_text, text_before_cursor, statement):
# def _split_multiple_statements(full_text, text_before_cursor, parsed):
# def suggest_special(text):
# def suggest_based_on_last_token(token, stmt):
# def _suggest_expression(token_v, stmt):
# def identifies(id, ref):
# def _allow_join_condition(statement):
# def _allow_join(statement):
# SPECIALS_SUGGESTION = {
#     "dT": Datatype,
#     "df": Function,
#     "dt": Table,
#     "dv": View,
#     "sf": Function,
# }
# 
# Path: pgcli/packages/parseutils/tables.py
# def is_subselect(parsed):
# def _identifier_is_function(identifier):
# def extract_from_part(parsed, stop_at_punctuation=True):
# def extract_table_identifiers(token_stream, allow_functions=True):
#     def parse_identifier(item):
# def extract_tables(sql):


from pgcli.packages.sqlcompletion import (
    suggest_type,
    Special,
    Database,
    Schema,
    Table,
    Column,
    View,
    Keyword,
    FromClauseItem,
    Function,
    Datatype,
    Alias,
    JoinCondition,
    Join,
)
from pgcli.packages.parseutils.tables import TableReference
import pytest
@pytest.mark.parametrize("initial_text", ("", "    ", "\t \t", "\n"))
def test_specials_included_for_initial_completion(initial_text):
    suggestions = suggest_type(initial_text, initial_text)

    assert set(suggestions) == {Keyword(), Special()}


def test_drop_schema_qualified_table_suggests_only_tables():
    text = "DROP TABLE schema_name.table_name"
    suggestions = suggest_type(text, text)
    assert suggestions == (Table(schema="schema_name"),)


@pytest.mark.parametrize("text", (",", "  ,", "sel ,"))
def test_handle_pre_completion_comma_gracefully(text):
    suggestions = suggest_type(text, text)

    assert iter(suggestions)


def test_drop_schema_suggests_schemas():
    sql = "DROP SCHEMA "
    assert suggest_type(sql, sql) == (Schema(),)


@pytest.mark.parametrize("text", ["SELECT x::", "SELECT x::y", "SELECT (x + y)::"])
def test_cast_operator_suggests_types(text):
    assert set(suggest_type(text, text)) == {
        Datatype(schema=None),
        Table(schema=None),

# Path: pgcli/packages/sqlcompletion.py
# class SqlStatement:
#     def __init__(self, full_text, text_before_cursor):
#     def is_insert(self):
#     def get_tables(self, scope="full"):
#     def get_previous_token(self, token):
#     def get_identifier_schema(self):
#     def reduce_to_prev_keyword(self, n_skip=0):
# def suggest_type(full_text, text_before_cursor):
# def _strip_named_query(txt):
# def _find_function_body(text):
# def _statement_from_function(full_text, text_before_cursor, statement):
# def _split_multiple_statements(full_text, text_before_cursor, parsed):
# def suggest_special(text):
# def suggest_based_on_last_token(token, stmt):
# def _suggest_expression(token_v, stmt):
# def identifies(id, ref):
# def _allow_join_condition(statement):
# def _allow_join(statement):
# SPECIALS_SUGGESTION = {
#     "dT": Datatype,
#     "df": Function,
#     "dt": Table,
#     "dv": View,
#     "sf": Function,
# }
# 
# Path: pgcli/packages/parseutils/tables.py
# def is_subselect(parsed):
# def _identifier_is_function(identifier):
# def extract_from_part(parsed, stop_at_punctuation=True):
# def extract_table_identifiers(token_stream, allow_functions=True):
#     def parse_identifier(item):
# def extract_tables(sql):


# Path: tests/test_sqlcompletion.py
from pgcli.packages.sqlcompletion import (
    suggest_type,
    Special,
    Database,
    Schema,
    Table,
    Column,
    View,
    Keyword,
    FromClauseItem,
    Function,
    Datatype,
    Alias,
    JoinCondition,
    Join,
)
from pgcli.packages.parseutils.tables import TableReference
import pytest

@pytest.mark.parametrize("initial_text", ("", "    ", "\t \t", "\n"))
def test_specials_included_for_initial_completion(initial_text):
    suggestions = suggest_type(initial_text, initial_text)

    assert set(suggestions) == {Keyword(), Special()}


def test_drop_schema_qualified_table_suggests_only_tables():
    text = "DROP TABLE schema_name.table_name"
    suggestions = suggest_type(text, text)
    assert suggestions == (Table(schema="schema_name"),)


@pytest.mark.parametrize("text", (",", "  ,", "sel ,"))
def test_handle_pre_completion_comma_gracefully(text):
    suggestions = suggest_type(text, text)

    assert iter(suggestions)


def test_drop_schema_suggests_schemas():
    sql = "DROP SCHEMA "
    assert suggest_type(sql, sql) == (Schema(),)


@pytest.mark.parametrize("text", ["SELECT x::", "SELECT x::y", "SELECT (x + y)::"])
def test_cast_operator_suggests_types(text):
    assert set(suggest_type(text, text)) == {
        Datatype(schema=None),
        Table(schema=None),

        Schema(),