from typing import Any
from psycopg.rows import Row
from .s0_base import *
from .change_set import ChangeSet
from .s24_coordinates import *
from .utility import *
from .schema import *


schema: dict[str, dict[str, Any]] = { \
    'id'        : define_property(str_type, False, True), \
    'head'      : define_property(float_type), \
    'pattern'   : define_property(str_type, True), \
    'coord'     : define_property(client_point_type), \
    'links'     : define_property(str_list_type, False, True)}


def get_reservoir_schema(name: str) -> dict[str, dict[str, Any]]:
    return schema


def _query_reservoir(name: str, id: str) -> Row | None:
    return read(name, f"select * from reservoirs where id = '{id}'")


def add_reservoir(name: str, id: str, x: float, y: float, head: float) -> ChangeSet:
    if is_reservoir(name, id):
        return ChangeSet()

    sql = f"insert into _node (id, type) values ('{id}', '{RESERVOIR}');"
    sql += f"\ninsert into reservoirs (id, head) values ('{id}', {head});"
    sql += f"\ninsert into coordinates (node, coord) values ('{id}', '({x}, {y})');"

    undo = f"delete from coordinates where node = ''{id}'';"
    undo += f"\ndelete from reservoirs where id = ''{id}'';"
    undo += f"\ndelete from _node where id = ''{id}'';"

    write(name, sql)
    add_operation(name, sql.replace("'", "''"), undo, 'add_reservoir', API_ADD, RESERVOIR, id)
    return get_current_change_set(name)


def get_reservoir(name: str, id: str) -> dict[str, Any] | None:
    row = _query_reservoir(name, id)
    if row == None:
        return None

    ps: dict[str, str] = {}
    ps['id'] = id
    ps['head'] = float(row['head'])
    ps['pattern'] = row['pattern']
    ps['coord'] = get_node_coord(name, id)
    ps['links'] = get_node_links(name, id)
    return ps


def set_reservoir(name: str, id: str, properties: dict[str, Any]) -> ChangeSet:
    if not is_reservoir(name, id):
        return ChangeSet()
    if 'pattern' in properties:
        if not is_pattern(properties['pattern']):
            return ChangeSet()

    old = Serialize(get_reservoir(name, id), schema).to_storage()

    new = get_reservoir(name, id)
    ps: list[str] = []
    for key in properties:
        if key in schema and schema[key]['readonly'] == False:
            new[key] = properties[key]
            ps.append(key)
    new = Serialize(new, schema).to_execution()

    sql = f"update reservoirs set head = {new['head']}, pattern = {new['pattern']} where id = '{id}';"
    undo = ""
    if 'coord' in ps:
        sql += f"\nupdate coordinates set coord = {new['coord']} where node = '{id}';"
        undo = f"update coordinates set coord = {old['coord']} where node = ''{id}'';"
    undo += f"\nupdate reservoirs set head = {old['head']}, pattern = {old['pattern']} where id = ''{id}'';"

    write(name, sql)
    add_operation(name, sql.replace("'", "''"), undo, 'set_reservoir', API_UPDATE, RESERVOIR, id, ps)
    return get_current_change_set(name)


def delete_reservoir(name: str, id: str) -> ChangeSet:
    row = get_reservoir(name, id)
    if row == None:
        return ChangeSet()

    old = Serialize(get_reservoir(name, id), schema).to_storage()

    sql = f"delete from coordinates where node = '{id}';"
    sql += f"\ndelete from reservoirs where id = '{id}';"
    sql += f"\ndelete from _node where id = '{id}';"

    undo = f"insert into _node (id, type) values (''{id}'', ''{RESERVOIR}'');"
    undo += f"\ninsert into reservoirs (id, head, pattern) values (''{id}'', {old['head']}, {old['pattern']});"
    undo += f"\ninsert into coordinates (node, coord) values (''{id}'', {old['coord']});"

    write(name, sql)
    add_operation(name, sql.replace("'", "''"), undo, 'delete_reservoir', API_DELETE, RESERVOIR, id)
    return get_current_change_set(name)