from psycopg.rows import Row
from .s0_base import *
from .change_set import ChangeSet
from .utility import *


PIPE_STATUS_OPEN = 'open'
PIPE_STATUS_CLOSED = 'closed'
PIPE_STATUS_CV = 'cv'


def add_pipe(name: str, id: str, node1: str, node2: str, length: float = 0, diameter: float = 0, roughness: float = 0, minor_loss: float = 0, status: str = PIPE_STATUS_OPEN) -> ChangeSet:
    if not is_node(name, node1):
        return ChangeSet()
    if not is_node(name, node2):
        return ChangeSet()
    if node1 == node2:
        return ChangeSet()

    if status != PIPE_STATUS_OPEN and status != PIPE_STATUS_CLOSED and status != PIPE_STATUS_CV:
        return ChangeSet()

    sql = f"insert into pipes (id, node1, node2, length, diameter, roughness, minor_loss, status) values ('{id}', '{node1}', '{node2}', {length}, {diameter}, {roughness}, {minor_loss}, '{status}');"
    undo_sql = f'delete from pipes where id = "{id}";'
    return add_link(name, PIPE, id, sql, undo_sql)


def _get_pipe(name: str, id: str) -> Row | None:
    return query(name, f"select node1, node2, length, diameter, roughness, minor_loss, status from pipes where id = '{id}'")


def delete_pipe(name: str, id: str) -> ChangeSet:
    if not is_pipe(name, id):
        return ChangeSet()

    row = _get_pipe(name, id)
    if row == None:
        return ChangeSet()

    node1, node2, length, diameter, roughness, minor_loss, status = row['node1'], row['node2'], row['length'], row['diameter'], row['roughness'], row['minor_loss'], row['status']

    sql = f"delete from pipes where id = '{id}';"
    undo_sql = f'insert into pipes (id, node1, node2, length, diameter, roughness, minor_loss, status) values ("{id}", "{node1}", "{node2}", {length}, {diameter}, {roughness}, {minor_loss}, "{status}");'

    return delete_link(name, PIPE, id, sql, undo_sql)


def get_pipe_node1(name: str, id: str) -> str | None:
    row = _get_pipe(name, id)
    return row['node1'] if row != None else None


def get_pipe_node2(name: str, id: str) -> str | None:
    row = _get_pipe(name, id)
    return row['node2'] if row != None else None


def get_pipe_length(name: str, id: str) -> float | None:
    row = _get_pipe(name, id)
    return float(row['length']) if row != None else None


def get_pipe_diameter(name: str, id: str) -> float | None:
    row = _get_pipe(name, id)
    return float(row['diameter']) if row != None else None


def get_pipe_roughness(name: str, id: str) -> float | None:
    row = _get_pipe(name, id)
    return float(row['roughness']) if row != None else None


def get_pipe_minor_loss(name: str, id: str) -> float | None:
    row = _get_pipe(name, id)
    return float(row['minor_loss']) if row != None else None


def get_pipe_status(name: str, id: str) -> str | None:
    row = _get_pipe(name, id)
    return row['status'] if row != None else None


def _set_pipe(name: str, id: str, key: str, key_type: str, value: str, optional: bool = False) -> ChangeSet:
    if not is_pipe(name, id):
        return ChangeSet()

    row = _get_pipe(name, id)
    if row == None:
        return ChangeSet()

    return update(name, PIPE, 'pipes', 'id', id, key, key_type, row[key], value, optional)


def set_pipe_node1(name: str, id: str, node1: str) -> ChangeSet:
    if not is_node(name, node1):
        return ChangeSet()
    if get_pipe_node2(name, id) == node1:
        return ChangeSet()

    return _set_pipe(name, id, 'node1', 'str', str(node1))


def set_pipe_node2(name: str, id: str, node2: str) -> ChangeSet:
    if not is_node(name, node2):
        return ChangeSet()
    if get_pipe_node1(name, id) == node2:
        return ChangeSet()

    return _set_pipe(name, id, 'node2', 'str', str(node2))


def set_pipe_length(name: str, id: str, length: float) -> ChangeSet:
    return _set_pipe(name, id, 'length', 'float', str(length))


def set_pipe_diameter(name: str, id: str, diameter: float) -> ChangeSet:
    return _set_pipe(name, id, 'diameter', 'float', str(diameter))


def set_pipe_roughness(name: str, id: str, roughness: float) -> ChangeSet:
    return _set_pipe(name, id, 'roughness', 'float', str(roughness))


def set_pipe_minor_loss(name: str, id: str, minor_loss: float) -> ChangeSet:
    return _set_pipe(name, id, 'minor_loss', 'float', str(minor_loss))


def set_pipe_status(name: str, id: str, status: float) -> ChangeSet:
    if status != PIPE_STATUS_OPEN and status != PIPE_STATUS_CLOSED and status != PIPE_STATUS_CV:
        return ChangeSet()

    return _set_pipe(name, id, 'status', 'str', str(status))