#########################################################################
#
# pgAdmin 4 - PostgreSQL Tools
#
# Copyright (C) 2013 - 2024, The pgAdmin Development Team
# This software is released under the PostgreSQL Licence
#
##########################################################################

"""Perform the initial setup of the application, by creating the auth
and settings database."""

import os
import sys
import typer
from rich.console import Console
from rich.table import Table
from rich import box, print
import json as jsonlib
from functools import wraps

console = Console()
app = typer.Typer()

# We need to include the root directory in sys.path to ensure that we can
# find everything we need when running in the standalone runtime.
root = os.path.dirname(os.path.realpath(__file__))
if sys.path[0] != root:
    sys.path.insert(0, root)

import builtins
import config

# Grab the SERVER_MODE if it's been set by the runtime
if 'SERVER_MODE' in globals():
    builtins.SERVER_MODE = globals()['SERVER_MODE']
else:
    builtins.SERVER_MODE = None

from pgadmin.model import db, Version, User, \
    SCHEMA_VERSION as CURRENT_SCHEMA_VERSION
from pgadmin import create_app
from pgadmin.utils import clear_database_servers, dump_database_servers, \
    load_database_servers, _handle_error
from pgadmin.setup import db_upgrade, create_app_data_directory
from typing import Optional, List
from typing_extensions import Annotated
from pgadmin.utils.constants import INTERNAL, LDAP, OAUTH2, \
    KERBEROS, WEBSERVER
from pgadmin.tools.user_management import create_user, delete_user, \
    update_user as user_management_update_user
from enum import Enum
from flask_babel import gettext


app = typer.Typer(pretty_exceptions_show_locals=False)
USER_NOT_FOUND_STR = "User not found"
SOMETHING_WENT_WRONG = 'Something went wrong. '


def update_sqlite_path(f):
    """
    This function will behave as a decorator which will check if
    sqlite path is provided and will update it in config
    """

    @wraps(f)
    def wrap(*args, **kwargs):
        if kwargs and kwargs.get('sqlite_path') is not None:
            # update the sqlite path
            config.SQLITE_PATH = kwargs['sqlite_path']
        return f(*args, **kwargs)

    return wrap


class ManageServers:

    @app.command()
    @update_sqlite_path
    def dump_servers(output_file: str, user: Optional[str] = None,
                     auth_source: Optional[str] = INTERNAL,
                     sqlite_path: Optional[str] = None,
                     server: List[int] = None):
        """Dump the server groups and servers. """

        # What user?
        dump_user = user if user is not None else config.DESKTOP_USER

        print('----------')
        print('Dumping servers with:')
        print('User:', dump_user)
        print('SQLite pgAdmin config:', config.SQLITE_PATH)
        print('----------')

        try:
            app = create_app(config.APP_NAME + '-cli')
            with app.test_request_context():
                dump_database_servers(output_file, server, dump_user, True,
                                      auth_source)
        except Exception as e:
            print(str(e))

    @app.command()
    @update_sqlite_path
    def load_servers(input_file: str, user: Optional[str] = None,
                     auth_source: Optional[str] = INTERNAL,
                     sqlite_path: Optional[str] = None,
                     replace: Optional[bool] = False
                     ):

        """Load server groups and servers."""

        # What user?
        load_user = user if user is not None else config.DESKTOP_USER

        print('----------')
        print('Loading servers with:')
        print('User:', load_user)
        print('SQLite pgAdmin config:', config.SQLITE_PATH)
        print('----------')

        try:
            app = create_app(config.APP_NAME + '-cli')
            with app.test_request_context():
                if replace:
                    clear_database_servers(load_user, True, auth_source)
                load_database_servers(input_file, None, load_user, True,
                                      auth_source)
        except Exception as e:
            print(str(e))


class AuthExtTypes(str, Enum):
    oauth2 = OAUTH2
    ldap = LDAP
    kerberos = KERBEROS
    webserver = WEBSERVER


# Enum class can not be extended
class AuthType(str, Enum):
    oauth2 = OAUTH2
    ldap = LDAP
    kerberos = KERBEROS
    webserver = WEBSERVER
    internal = INTERNAL


class ManageUsers:

    @app.command()
    @update_sqlite_path
    def add_user(email: str, password: str,
                 role: Annotated[Optional[bool], typer.Option(
                     "--admin/--nonadmin")] = False,
                 active: Annotated[Optional[bool],
                                   typer.Option("--active/--inactive")] = True,
                 console: Optional[bool] = True,
                 json: Optional[bool] = False,
                 sqlite_path: Optional[str] = None,
                 ):
        """Add Internal user. """

        data = {
            'email': email,
            'role': 1 if role else 2,
            'active': active,
            'auth_source': INTERNAL,
            'newPassword': password,
            'confirmPassword': password,
        }
        ManageUsers.create_user(data, console, json)

    @app.command()
    @update_sqlite_path
    def add_external_user(username: str,
                          auth_source: AuthExtTypes = AuthExtTypes.oauth2,
                          email: Optional[str] = None,
                          role: Annotated[Optional[bool],
                                          typer.Option(
                                              "--admin/--nonadmin")] = False,
                          active: Annotated[Optional[bool],
                                            typer.Option(
                                                "--active/--inactive")] = True,
                          console: Optional[bool] = True,
                          json: Optional[bool] = False,
                          sqlite_path: Optional[str] = None,
                          ):
        """Add external user, other than Internal like
        Ldap, Ouath2, Kerberos, Webserver. """

        data = {
            'username': username,
            'email': email,
            'role': 1 if role else 2,
            'active': active,
            'auth_source': auth_source
        }
        ManageUsers.create_user(data, console, json)

    @app.command()
    @update_sqlite_path
    def delete_user(username: str,
                    auth_source: AuthType = AuthType.internal,
                    auto_confirm: Annotated[Optional[bool],
                                            typer.Option(
                                                "--yes")] = False,
                    sqlite_path: Optional[str] = None,
                    ):
        """Delete the user. """

        confirm_msg = "Are you sure you want to delete it?"

        if auto_confirm or typer.confirm(confirm_msg):
            app = create_app(config.APP_NAME + '-cli')
            with app.test_request_context():
                uid = ManageUsers.get_user(username=username,
                                           auth_source=auth_source)
                if not uid:
                    print(USER_NOT_FOUND_STR)
                else:
                    status, msg = delete_user(uid)
                    if status:
                        print('User deleted successfully.')
                    else:
                        print(SOMETHING_WENT_WRONG + str(msg))

    @app.command()
    @update_sqlite_path
    def update_user(email: str,
                    password: Optional[str] = None,
                    role: Annotated[Optional[bool],
                                    typer.Option("--admin/--nonadmin"
                                                 )] = None,
                    active: Annotated[Optional[bool],
                                      typer.Option("--active/--inactive"
                                                   )] = None,
                    console: Optional[bool] = True,
                    json: Optional[bool] = False,
                    sqlite_path: Optional[str] = None,
                    ):
        """Update internal user."""

        data = dict()
        if password:
            if len(password) < 6:
                print("Password must be at least 6 characters long.")
                exit()
            # validate_password relies on the new password being present as
            # `newPassword` and `confirmPassword` in the data
            data['newPassword'] = password
            data['confirmPassword'] = password

        if role is not None:
            data['role'] = 1 if role else 2
        if active is not None:
            data['active'] = active

        app = create_app(config.APP_NAME + '-cli')
        with app.test_request_context():
            uid = ManageUsers.get_user(username=email,
                                       auth_source=INTERNAL)
            if not uid:
                print(USER_NOT_FOUND_STR)
            else:
                status, msg = user_management_update_user(uid, data)
                if status:
                    _user = ManageUsers.get_users_from_db(username=email,
                                                          auth_source=INTERNAL,
                                                          console=False)
                    ManageUsers.display_user(_user[0], console, json)
                else:
                    print(SOMETHING_WENT_WRONG + str(msg))

    @app.command()
    @update_sqlite_path
    def get_users(username: Optional[str] = None,
                  auth_source: AuthType = None,
                  json: Optional[bool] = False,
                  sqlite_path: Optional[str] = None,
                  ):

        ManageUsers.get_users_from_db(username, auth_source, True, json)

    def get_users_from_db(username: Optional[str] = None,
                          auth_source: AuthType = None,
                          console: Optional[bool] = True,
                          json: Optional[bool] = False,
                          ):
        """Get user(s) details."""

        app = create_app(config.APP_NAME + '-cli')
        with app.test_request_context():
            if username and auth_source:
                users = User.query.filter_by(username=username,
                                             auth_source=auth_source)
            elif not username and auth_source:
                users = User.query.filter_by(auth_source=auth_source)
            elif username and not auth_source:
                users = User.query.filter_by(username=username)
            else:
                users = User.query.all()
            users_data = []
            for u in users:
                _data = {'id': u.id,
                         'username': u.username,
                         'email': u.email,
                         'active': u.active,
                         'role': u.roles[0].id,
                         'auth_source': u.auth_source,
                         'locked': u.locked
                         }
                users_data.append(_data)
            if console:
                ManageUsers.display_user(users_data, console, json)
            else:
                return users_data

    @app.command()
    @update_sqlite_path
    def update_external_user(username: str,
                             auth_source: AuthExtTypes = AuthExtTypes.oauth2,
                             email: Optional[str] = None,
                             role: Annotated[Optional[bool],
                                             typer.Option("--admin/--nonadmin"
                                                          )] = None,
                             active: Annotated[
                                 Optional[bool],
                                 typer.Option("--active/--inactive")] = None,
                             console: Optional[bool] = True,
                             json: Optional[bool] = False,
                             sqlite_path: Optional[str] = None,
                             ):
        """Update external users other than Internal like
         Ldap, Ouath2, Kerberos, Webserver."""

        data = dict()
        if email:
            data['email'] = email
        if role is not None:
            data['role'] = 1 if role else 2
        if active is not None:
            data['active'] = active

        app = create_app(config.APP_NAME + '-cli')
        with app.test_request_context():
            uid = ManageUsers.get_user(username=username,
                                       auth_source=auth_source)
            if not uid:
                print(USER_NOT_FOUND_STR)
            else:
                status, msg = user_management_update_user(uid, data)
                if status:
                    _user = ManageUsers.get_users_from_db(
                        username=username,
                        auth_source=auth_source,
                        console=False
                    )
                    ManageUsers.display_user(_user[0], console, json)
                else:
                    print(SOMETHING_WENT_WRONG + str(msg))

    def create_user(data, console, json):
        app = create_app(config.APP_NAME + '-cli')
        with app.test_request_context():
            username = data['username'] if 'username' in data else \
                data['email']
            uid = ManageUsers.get_user(username=username,
                                       auth_source=data['auth_source'])
            if uid:
                print("User already exists.")
                exit()

            if 'newPassword' in data and len(data['newPassword']) < 6:
                print("Password must be at least 6 characters long.")
                exit()

            status, msg = create_user(data)
            if status:
                ManageUsers.display_user(data, console, json)
            else:
                print(SOMETHING_WENT_WRONG + str(msg))

    def get_user(username=None, auth_source=INTERNAL):
        app = create_app(config.APP_NAME + '-cli')
        usr = None
        with app.test_request_context():
            usr = User.query.filter_by(username=username,
                                       auth_source=auth_source).first()

            if not usr:
                return None
            return usr.id

    def display_user(data, _console, _json):
        if _console:
            if _json:
                json_formatted_str = jsonlib.dumps(data, indent=0)
                console.print(json_formatted_str)
            else:
                if isinstance(data, dict):
                    data = [data]
                for _data in data:
                    table = Table(title="User Details", box=box.ASCII)
                    table.add_column("Field", style="green")
                    table.add_column("Value", style="green")

                    if 'username' in _data:
                        table.add_row("Username", _data['username'])
                    if 'email' in _data:
                        table.add_row("Email", _data['email'])
                    table.add_row("auth_source", _data['auth_source'])
                    table.add_row("role",
                                  "Admin" if _data['role'] and
                                  _data['role'] != 2 else
                                  "Non-admin")
                    table.add_row("active",
                                  'True' if _data['active'] else 'False')
                    console.print(table)


class ManagePreferences:

    def get_user(username=None, auth_source=INTERNAL):
        app = create_app(config.APP_NAME + '-cli')
        usr = None
        with app.test_request_context():
            usr = User.query.filter_by(username=username,
                                       auth_source=auth_source).first()
            if not usr:
                return None
            return usr.id

    @app.command()
    @update_sqlite_path
    def get_prefs(json: Optional[bool] = False,
                  sqlite_path: Optional[str] = None,
                  ):

        return ManagePreferences.fetch_prefs()

    def fetch_prefs(id: Optional[bool] = None, json: Optional[bool] = False):
        """Get Preferences List."""
        app = create_app(config.APP_NAME + '-cli')
        table = Table(title="Pref Details", box=box.ASCII)
        table.add_column("Preference", style="green")
        with app.app_context():
            from pgadmin.model import Preferences as PrefTable, \
                ModulePreference as ModulePrefTable, \
                PreferenceCategory as PrefCategoryTbl

            module_prefs = ModulePrefTable.query.all()
            cat_prefs = PrefCategoryTbl.query.all()
            prefs = PrefTable.query.all()
            if id:
                all_preferences = {}
            else:
                all_preferences = []
            for i in module_prefs:
                for j in cat_prefs:
                    if i.id == j.mid:
                        for k in prefs:
                            if k.cid == j.id:
                                if id:
                                    all_preferences["{0}:{1}:{2}".format(
                                        i.name, j.name, k.name)
                                    ] = "{0}:{1}:{2}".format(i.id, j.id, k.id)
                                else:
                                    table.add_row("{0}:{1}:{2}".format(
                                        i.name, j.name, k.name))
                                    all_preferences.append(
                                        "{0}:{1}:{2}".format(
                                            i.name, j.name, k.name)
                                    )
            if id:
                return all_preferences
            else:
                if json:
                    json_formatted_str = jsonlib.dumps(
                        {"Preferences": all_preferences},
                        indent=0)
                    print(json_formatted_str)
                else:
                    print(table)

    @app.command()
    @update_sqlite_path
    def set_prefs(username,
                  pref_options: Annotated[Optional[List[str]],
                                          typer.Argument()] = None,
                  auth_source: AuthType = AuthType.internal,
                  console: Optional[bool] = True,
                  json: Optional[bool] = False,
                  input_file: Optional[str] = None,
                  sqlite_path: Optional[str] = None,
                  ):
        """Set User preferences."""
        if not pref_options:
            pref_options = []

        if input_file:
            from urllib.parse import unquote
            # generate full path of file
            try:
                file_path = unquote(input_file)
            except Exception as e:
                print(str(e))
                return _handle_error(str(e), True)
            import json as json_utility
            try:
                with open(file_path) as f:
                    data = json_utility.load(f)
            except json_utility.decoder.JSONDecodeError as e:
                return _handle_error(gettext("Error parsing input file %s: %s"
                                             % (file_path, e)), True)
            except Exception as e:
                return _handle_error(
                    gettext("Error reading input file %s: [%d] %s" %
                            (file_path, e.errno, e.strerror)), True)

            pref_data = data['preferences']

            for k, v in pref_data.items():
                pref_options.append(k + "=" + str(v))

        user_id = ManagePreferences.get_user(username, auth_source)
        table = Table(title="Updated Pref Details", box=box.ASCII)
        table.add_column("Preference", style="green")
        if not user_id:
            print(USER_NOT_FOUND_STR)
            return

        prefs = ManagePreferences.fetch_prefs(True)
        app = create_app(config.APP_NAME + '-cli')
        invalid_prefs = []
        valid_prefs = []
        with app.app_context():
            from pgadmin.preferences import save_pref
            for opt in pref_options:
                val = opt.split("=")
                if len(val) <= 1:
                    print('Preference key=value is required, example: '
                          '[green]sqleditor:editor:comma_first=true[/green]')
                    return
                final_opt = val[0].split(":")
                val = val[1]
                f = ":".join(final_opt)
                if f in prefs:
                    ids = prefs[f].split(":")
                    _row = {
                        'mid': int(ids[0]),
                        'category_id': int(ids[1]),
                        'id': int(ids[2]),
                        'name': final_opt[2],
                        'user_id': user_id,
                        'value': val}
                    save_pref(_row)
                    valid_prefs.append(_row)

                    if not json:
                        table.add_row(jsonlib.dumps(_row))
                else:
                    invalid_prefs.append(f)

            if len(invalid_prefs) >= 1:
                print("Preference(s) [red]{0}[/red] not found.".format(
                    (', ').join(
                        invalid_prefs)))

            if not json and console:
                print(table)
            elif json and console:
                print(jsonlib.dumps(valid_prefs, indent=2))


@app.command()
def setup_db(app: Annotated[str, typer.Argument(
        help="This argument doesn't require in CLI mode.")] = None):
    """Setup the configuration database."""

    app = app or create_app()
    create_app_data_directory(config)

    print("pgAdmin 4 - Application Initialisation")
    print("======================================\n")

    def run_migration_for_sqlite():
        with app.app_context():
            # Run migration for the first time i.e. create database
            from config import SQLITE_PATH
            if not os.path.exists(SQLITE_PATH):
                db_upgrade(app)
            else:
                version = Version.query.filter_by(name='ConfigDB').first()
                schema_version = version.value

                # Run migration if current schema version is greater than the
                # schema version stored in version table
                if CURRENT_SCHEMA_VERSION >= schema_version:
                    db_upgrade(app)

                # Update schema version to the latest
                if CURRENT_SCHEMA_VERSION > schema_version:
                    version = Version.query.filter_by(name='ConfigDB').first()
                    version.value = CURRENT_SCHEMA_VERSION
                    db.session.commit()

            if os.name != 'nt':
                os.chmod(config.SQLITE_PATH, 0o600)

    def run_migration_for_others():
        with app.app_context():
            version = Version.query.filter_by(name='ConfigDB').first()
            if version == -1:
                db_upgrade(app)
            else:
                schema_version = version.value

                # Run migration if current schema version is greater than the
                # schema version stored in version table
                if CURRENT_SCHEMA_VERSION >= schema_version:
                    db_upgrade(app)

                # Update schema version to the latest
                if CURRENT_SCHEMA_VERSION > schema_version:
                    version = Version.query.filter_by(name='ConfigDB').first()
                    version.value = CURRENT_SCHEMA_VERSION
                    db.session.commit()

    # Run the migration as per specified by the user.
    if config.CONFIG_DATABASE_URI is not None and \
            len(config.CONFIG_DATABASE_URI) > 0:
        run_migration_for_others()
    else:
        run_migration_for_sqlite()


def main():
    app()


if __name__ == "__main__":
    main()