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


def add_junction(name: str, id: str, x: float, y: float, elevation: float) -> ChangeSet:
    sql = f"insert into junctions (id, elevation) values ('{id}', {elevation});"
    undo_sql = f'delete from junctions where id = "{id}";'
    return add_node(name, JUNCTION, id, x, y, sql, undo_sql)


def _get_junction(name: str, id: str) -> Row | None:
    return utility.query(name, f"select elevation, demand, pattern from junctions where id = '{id}'")


def delete_junction(name: str, id: str) -> ChangeSet:
    if not is_junction(name, id):
        return ChangeSet()

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

    elevation = row['elevation']
    demand = utility.decorate(row['demand'], 'float', True)
    pattern = utility.decorate(row['pattern'], 'str', True)

    sql = f"delete from junctions where id = '{id}';"
    undo_sql = f'insert into junctions (id, elevation, demand, pattern) values ("{id}", {elevation}, {demand}, {pattern});'

    return delete_node(name, JUNCTION, id, sql, undo_sql)


def get_junction_elevation(name: str, id: str) -> float | None:
    row = _get_junction(name, id)
    return float(row['elevation']) if row != None else None


def get_junction_demand(name: str, id: str) -> float | str | None:
    row = _get_junction(name, id)
    if row != None:
        return float(row['demand']) if row['demand'] != None else 'NULL'
    else:
        return None


def get_junction_pattern(name: str, id: str) -> str | None:
    row = _get_junction(name, id)
    if row != None:
        return row['pattern'] if row['pattern'] != None else 'NULL'
    else:
        return None


def get_junction_coord(name: str, id: str) -> dict[str, float] | None:
    return get_node_coord(name, id)


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

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

    return utility.update(name, JUNCTION, 'junctions', 'id', id, key, key_type, row[key], value, optional)


def set_junction_elevation(name: str, id: str, elevation: float) -> ChangeSet:
    return _set_junction(name, id, 'elevation', 'float', str(elevation))


def set_junction_demand(name: str, id: str, demand: float) -> ChangeSet:
    return _set_junction(name, id, 'demand', 'float', str(demand), True)


def set_junction_pattern(name: str, id: str, pattern: str) -> ChangeSet:
    if not is_pattern(name, pattern):
        return ChangeSet()

    return _set_junction(name, id, 'pattern', 'str', pattern, True)


def set_junction_coord(name: str, id: str, x: float, y: float) -> ChangeSet:
    return set_node_coord(name, id, x, y)