import os
import shutil

import click
from click.testing import CliRunner

from mycli.main import MyCli, cli, thanks_picker
from mycli.packages.special.main import COMMANDS as SPECIAL_COMMANDS
from mycli.sqlexecute import ServerInfo
from .utils import USER, HOST, PORT, PASSWORD, dbtest, run

from textwrap import dedent
from collections import namedtuple

from tempfile import NamedTemporaryFile
from textwrap import dedent


test_dir = os.path.abspath(os.path.dirname(__file__))
project_dir = os.path.dirname(test_dir)
default_config_file = os.path.join(project_dir, 'test', 'myclirc')
login_path_file = os.path.join(test_dir, 'mylogin.cnf')

os.environ['MYSQL_TEST_LOGIN_FILE'] = login_path_file
CLI_ARGS = ['--user', USER, '--host', HOST, '--port', PORT,
            '--password', PASSWORD, '--myclirc', default_config_file,
            '--defaults-file', default_config_file,
            'mycli_test_db']


@dbtest
def test_execute_arg(executor):
    run(executor, 'create table test (a text)')
    run(executor, 'insert into test values("abc")')

    sql = 'select * from test;'
    runner = CliRunner()
    result = runner.invoke(cli, args=CLI_ARGS + ['-e', sql])

    assert result.exit_code == 0
    assert 'abc' in result.output

    result = runner.invoke(cli, args=CLI_ARGS + ['--execute', sql])

    assert result.exit_code == 0
    assert 'abc' in result.output

    expected = 'a\nabc\n'

    assert expected in result.output


@dbtest
def test_execute_arg_with_table(executor):
    run(executor, 'create table test (a text)')
    run(executor, 'insert into test values("abc")')

    sql = 'select * from test;'
    runner = CliRunner()
    result = runner.invoke(cli, args=CLI_ARGS + ['-e', sql] + ['--table'])
    expected = '+-----+\n| a   |\n+-----+\n| abc |\n+-----+\n'

    assert result.exit_code == 0
    assert expected in result.output


@dbtest
def test_execute_arg_with_csv(executor):
    run(executor, 'create table test (a text)')
    run(executor, 'insert into test values("abc")')

    sql = 'select * from test;'
    runner = CliRunner()
    result = runner.invoke(cli, args=CLI_ARGS + ['-e', sql] + ['--csv'])
    expected = '"a"\n"abc"\n'

    assert result.exit_code == 0
    assert expected in "".join(result.output)


@dbtest
def test_batch_mode(executor):
    run(executor, '''create table test(a text)''')
    run(executor, '''insert into test values('abc'), ('def'), ('ghi')''')

    sql = (
        'select count(*) from test;\n'
        'select * from test limit 1;'
    )

    runner = CliRunner()
    result = runner.invoke(cli, args=CLI_ARGS, input=sql)

    assert result.exit_code == 0
    assert 'count(*)\n3\na\nabc\n' in "".join(result.output)


@dbtest
def test_batch_mode_table(executor):
    run(executor, '''create table test(a text)''')
    run(executor, '''insert into test values('abc'), ('def'), ('ghi')''')

    sql = (
        'select count(*) from test;\n'
        'select * from test limit 1;'
    )

    runner = CliRunner()
    result = runner.invoke(cli, args=CLI_ARGS + ['-t'], input=sql)

    expected = (dedent("""\
        +----------+
        | count(*) |
        +----------+
        | 3        |
        +----------+
        +-----+
        | a   |
        +-----+
        | abc |
        +-----+"""))

    assert result.exit_code == 0
    assert expected in result.output


@dbtest
def test_batch_mode_csv(executor):
    run(executor, '''create table test(a text, b text)''')
    run(executor,
        '''insert into test (a, b) values('abc', 'de\nf'), ('ghi', 'jkl')''')

    sql = 'select * from test;'

    runner = CliRunner()
    result = runner.invoke(cli, args=CLI_ARGS + ['--csv'], input=sql)

    expected = '"a","b"\n"abc","de\nf"\n"ghi","jkl"\n'

    assert result.exit_code == 0
    assert expected in "".join(result.output)


def test_thanks_picker_utf8():
    name = thanks_picker()
    assert name and isinstance(name, str)


def test_help_strings_end_with_periods():
    """Make sure click options have help text that end with a period."""
    for param in cli.params:
        if isinstance(param, click.core.Option):
            assert hasattr(param, 'help')
            assert param.help.endswith('.')


def test_command_descriptions_end_with_periods():
    """Make sure that mycli commands' descriptions end with a period."""
    MyCli()
    for _, command in SPECIAL_COMMANDS.items():
        assert command[3].endswith('.')


def output(monkeypatch, terminal_size, testdata, explicit_pager, expect_pager):
    global clickoutput
    clickoutput = ""
    m = MyCli(myclirc=default_config_file)

    class TestOutput():
        def get_size(self):
            size = namedtuple('Size', 'rows columns')
            size.columns, size.rows = terminal_size
            return size

    class TestExecute():
        host = 'test'
        user = 'test'
        dbname = 'test'
        server_info = ServerInfo.from_version_string('unknown')
        port = 0

        def server_type(self):
            return ['test']

    class PromptBuffer():
        output = TestOutput()

    m.prompt_app = PromptBuffer()
    m.sqlexecute = TestExecute()
    m.explicit_pager = explicit_pager

    def echo_via_pager(s):
        assert expect_pager
        global clickoutput
        clickoutput += "".join(s)

    def secho(s):
        assert not expect_pager
        global clickoutput
        clickoutput += s + "\n"

    monkeypatch.setattr(click, 'echo_via_pager', echo_via_pager)
    monkeypatch.setattr(click, 'secho', secho)
    m.output(testdata)
    if clickoutput.endswith("\n"):
        clickoutput = clickoutput[:-1]
    assert clickoutput == "\n".join(testdata)


def test_conditional_pager(monkeypatch):
    testdata = "Lorem ipsum dolor sit amet consectetur adipiscing elit sed do".split(
        " ")
    # User didn't set pager, output doesn't fit screen -> pager
    output(
        monkeypatch,
        terminal_size=(5, 10),
        testdata=testdata,
        explicit_pager=False,
        expect_pager=True
    )
    # User didn't set pager, output fits screen -> no pager
    output(
        monkeypatch,
        terminal_size=(20, 20),
        testdata=testdata,
        explicit_pager=False,
        expect_pager=False
    )
    # User manually configured pager, output doesn't fit screen -> pager
    output(
        monkeypatch,
        terminal_size=(5, 10),
        testdata=testdata,
        explicit_pager=True,
        expect_pager=True
    )
    # User manually configured pager, output fit screen -> pager
    output(
        monkeypatch,
        terminal_size=(20, 20),
        testdata=testdata,
        explicit_pager=True,
        expect_pager=True
    )

    SPECIAL_COMMANDS['nopager'].handler()
    output(
        monkeypatch,
        terminal_size=(5, 10),
        testdata=testdata,
        explicit_pager=False,
        expect_pager=False
    )
    SPECIAL_COMMANDS['pager'].handler('')


def test_reserved_space_is_integer(monkeypatch):
    """Make sure that reserved space is returned as an integer."""
    def stub_terminal_size():
        return (5, 5)

    with monkeypatch.context() as m:
        m.setattr(shutil, 'get_terminal_size', stub_terminal_size)
        mycli = MyCli()
        assert isinstance(mycli.get_reserved_space(), int)


def test_list_dsn():
    runner = CliRunner()
    # keep Windows from locking the file with delete=False
    with NamedTemporaryFile(mode="w",delete=False) as myclirc:
        myclirc.write(dedent("""\
            [alias_dsn]
            test = mysql://test/test
            """))
        myclirc.flush()
        args = ['--list-dsn', '--myclirc', myclirc.name]
        result = runner.invoke(cli, args=args)
        assert result.output == "test\n"
        result = runner.invoke(cli, args=args + ['--verbose'])
        assert result.output == "test : mysql://test/test\n"
        
    # delete=False means we should try to clean up
    try:
        if os.path.exists(myclirc.name):
            os.remove(myclirc.name)
    except Exception as e:
        print(f"An error occurred while attempting to delete the file: {e}")

        


def test_prettify_statement():
    statement = 'SELECT 1'
    m = MyCli()
    pretty_statement = m.handle_prettify_binding(statement)
    assert pretty_statement == 'SELECT\n    1;'


def test_unprettify_statement():
    statement = 'SELECT\n    1'
    m = MyCli()
    unpretty_statement = m.handle_unprettify_binding(statement)
    assert unpretty_statement == 'SELECT 1;'


def test_list_ssh_config():
    runner = CliRunner()
    # keep Windows from locking the file with delete=False
    with NamedTemporaryFile(mode="w",delete=False) as ssh_config:
        ssh_config.write(dedent("""\
            Host test
                Hostname test.example.com
                User joe
                Port 22222
                IdentityFile ~/.ssh/gateway
        """))
        ssh_config.flush()
        args = ['--list-ssh-config', '--ssh-config-path', ssh_config.name]
        result = runner.invoke(cli, args=args)
        assert "test\n" in result.output
        result = runner.invoke(cli, args=args + ['--verbose'])
        assert "test : test.example.com\n" in result.output
        
    # delete=False means we should try to clean up
    try:
        if os.path.exists(ssh_config.name):
            os.remove(ssh_config.name)
    except Exception as e:
        print(f"An error occurred while attempting to delete the file: {e}")


def test_dsn(monkeypatch):
    # Setup classes to mock mycli.main.MyCli
    class Formatter:
        format_name = None

    class Logger:
        def debug(self, *args, **args_dict):
            pass

        def warning(self, *args, **args_dict):
            pass

    class MockMyCli:
        config = {'alias_dsn': {}}

        def __init__(self, **args):
            self.logger = Logger()
            self.destructive_warning = False
            self.formatter = Formatter()

        def connect(self, **args):
            MockMyCli.connect_args = args

        def run_query(self, query, new_line=True):
            pass

    import mycli.main
    monkeypatch.setattr(mycli.main, 'MyCli', MockMyCli)
    runner = CliRunner()

    # When a user supplies a DSN as database argument to mycli,
    # use these values.
    result = runner.invoke(mycli.main.cli, args=[
        "mysql://dsn_user:dsn_passwd@dsn_host:1/dsn_database"]
    )
    assert result.exit_code == 0, result.output + " " + str(result.exception)
    assert \
        MockMyCli.connect_args["user"] == "dsn_user" and \
        MockMyCli.connect_args["passwd"] == "dsn_passwd" and \
        MockMyCli.connect_args["host"] == "dsn_host" and \
        MockMyCli.connect_args["port"] == 1 and \
        MockMyCli.connect_args["database"] == "dsn_database"

    MockMyCli.connect_args = None

    # When a use supplies a DSN as database argument to mycli,
    # and used command line arguments, use the command line
    # arguments.
    result = runner.invoke(mycli.main.cli, args=[
        "mysql://dsn_user:dsn_passwd@dsn_host:2/dsn_database",
        "--user", "arg_user",
        "--password", "arg_password",
        "--host", "arg_host",
        "--port", "3",
        "--database", "arg_database",
    ])
    assert result.exit_code == 0, result.output + " " + str(result.exception)
    assert \
        MockMyCli.connect_args["user"] == "arg_user" and \
        MockMyCli.connect_args["passwd"] == "arg_password" and \
        MockMyCli.connect_args["host"] == "arg_host" and \
        MockMyCli.connect_args["port"] == 3 and \
        MockMyCli.connect_args["database"] == "arg_database"

    MockMyCli.config = {
        'alias_dsn': {
            'test': 'mysql://alias_dsn_user:alias_dsn_passwd@alias_dsn_host:4/alias_dsn_database'
        }
    }
    MockMyCli.connect_args = None

    # When a user uses a DSN from the configuration file (alias_dsn),
    # use these values.
    result = runner.invoke(cli, args=['--dsn', 'test'])
    assert result.exit_code == 0, result.output + " " + str(result.exception)
    assert \
        MockMyCli.connect_args["user"] == "alias_dsn_user" and \
        MockMyCli.connect_args["passwd"] == "alias_dsn_passwd" and \
        MockMyCli.connect_args["host"] == "alias_dsn_host" and \
        MockMyCli.connect_args["port"] == 4 and \
        MockMyCli.connect_args["database"] == "alias_dsn_database"

    MockMyCli.config = {
        'alias_dsn': {
            'test': 'mysql://alias_dsn_user:alias_dsn_passwd@alias_dsn_host:4/alias_dsn_database'
        }
    }
    MockMyCli.connect_args = None

    # When a user uses a DSN from the configuration file (alias_dsn)
    # and used command line arguments, use the command line arguments.
    result = runner.invoke(cli, args=[
        '--dsn', 'test', '',
        "--user", "arg_user",
        "--password", "arg_password",
        "--host", "arg_host",
        "--port", "5",
        "--database", "arg_database",
    ])
    assert result.exit_code == 0, result.output + " " + str(result.exception)
    assert \
        MockMyCli.connect_args["user"] == "arg_user" and \
        MockMyCli.connect_args["passwd"] == "arg_password" and \
        MockMyCli.connect_args["host"] == "arg_host" and \
        MockMyCli.connect_args["port"] == 5 and \
        MockMyCli.connect_args["database"] == "arg_database"

    # Use a DSN without password
    result = runner.invoke(mycli.main.cli, args=[
        "mysql://dsn_user@dsn_host:6/dsn_database"]
    )
    assert result.exit_code == 0, result.output + " " + str(result.exception)
    assert \
        MockMyCli.connect_args["user"] == "dsn_user" and \
        MockMyCli.connect_args["passwd"] is None and \
        MockMyCli.connect_args["host"] == "dsn_host" and \
        MockMyCli.connect_args["port"] == 6 and \
        MockMyCli.connect_args["database"] == "dsn_database"


def test_ssh_config(monkeypatch):
    # Setup classes to mock mycli.main.MyCli
    class Formatter:
        format_name = None

    class Logger:
        def debug(self, *args, **args_dict):
            pass

        def warning(self, *args, **args_dict):
            pass

    class MockMyCli:
        config = {'alias_dsn': {}}

        def __init__(self, **args):
            self.logger = Logger()
            self.destructive_warning = False
            self.formatter = Formatter()

        def connect(self, **args):
            MockMyCli.connect_args = args

        def run_query(self, query, new_line=True):
            pass

    import mycli.main
    monkeypatch.setattr(mycli.main, 'MyCli', MockMyCli)
    runner = CliRunner()

    # Setup temporary configuration
    # keep Windows from locking the file with delete=False
    with NamedTemporaryFile(mode="w",delete=False) as ssh_config:
        ssh_config.write(dedent("""\
            Host test
                Hostname test.example.com
                User joe
                Port 22222
                IdentityFile ~/.ssh/gateway
        """))
        ssh_config.flush()

        # When a user supplies a ssh config.
        result = runner.invoke(mycli.main.cli, args=[
            "--ssh-config-path",
            ssh_config.name,
            "--ssh-config-host",
            "test"
        ])
        assert result.exit_code == 0, result.output + \
            " " + str(result.exception)
        assert \
            MockMyCli.connect_args["ssh_user"] == "joe" and \
            MockMyCli.connect_args["ssh_host"] == "test.example.com" and \
            MockMyCli.connect_args["ssh_port"] == 22222 and \
            MockMyCli.connect_args["ssh_key_filename"] == os.path.expanduser( 
                "~") + "/.ssh/gateway"

        # When a user supplies a ssh config host as argument to mycli,
        # and used command line arguments, use the command line
        # arguments.
        result = runner.invoke(mycli.main.cli, args=[
            "--ssh-config-path",
            ssh_config.name,
            "--ssh-config-host",
            "test",
            "--ssh-user", "arg_user",
            "--ssh-host", "arg_host",
            "--ssh-port", "3",
            "--ssh-key-filename", "/path/to/key"
        ])
        assert result.exit_code == 0, result.output + \
            " " + str(result.exception)
        assert \
            MockMyCli.connect_args["ssh_user"] == "arg_user" and \
            MockMyCli.connect_args["ssh_host"] == "arg_host" and \
            MockMyCli.connect_args["ssh_port"] == 3 and \
            MockMyCli.connect_args["ssh_key_filename"] == "/path/to/key"
        
    # delete=False means we should try to clean up
    try:
        if os.path.exists(ssh_config.name):
            os.remove(ssh_config.name)
    except Exception as e:
        print(f"An error occurred while attempting to delete the file: {e}")


@dbtest
def test_init_command_arg(executor):
    init_command = "set sql_select_limit=1000"
    sql = 'show variables like "sql_select_limit";'
    runner = CliRunner()
    result = runner.invoke(
        cli, args=CLI_ARGS + ["--init-command", init_command], input=sql
    )

    expected = "sql_select_limit\t1000\n"
    assert result.exit_code == 0
    assert expected in result.output


@dbtest
def test_init_command_multiple_arg(executor):
    init_command = 'set sql_select_limit=2000; set max_join_size=20000'
    sql = (
        'show variables like "sql_select_limit";\n'
        'show variables like "max_join_size"'
    )
    runner = CliRunner()
    result = runner.invoke(
        cli, args=CLI_ARGS + ['--init-command', init_command], input=sql
    )

    expected_sql_select_limit = 'sql_select_limit\t2000\n'
    expected_max_join_size = 'max_join_size\t20000\n'

    assert result.exit_code == 0
    assert expected_sql_select_limit in result.output
    assert expected_max_join_size in result.output
