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 *


VALVES_TYPE_PRV = 'prv'
VALVES_TYPE_PSV = 'psv'
VALVES_TYPE_PBV = 'pbv'
VALVES_TYPE_FCV = 'fcv'
VALVES_TYPE_TCV = 'tcv'
VALVES_TYPE_GPV = 'gpv'


schema: dict[str, dict[str, Any]] = { \
    'id'        : define_property(str_type, False, True), \
    'node1'     : define_property(str_type), \
    'node2'     : define_property(str_type), \
    'diameter'  : define_property(float_type), \
    'type'      : define_property(str_type), \
    'setting'  : define_property(float_type), \
    'minor_loss': define_property(float_type)}


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


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


def _get_valve_node1(name: str, id: str) -> str | None:
    row = _query_valve(name, id)
    return row['node1'] if row != None else None


def _get_valve_node2(name: str, id: str) -> str | None:
    row = _query_valve(name, id)
    return row['node2'] if row != None else None


def add_valve(name: str, id: str, node1: str, node2: str, diameter: float = 0, type: str = VALVES_TYPE_PRV, setting: float = 0, minor_loss: float = 0) -> ChangeSet:
    if is_valve(name, id):
        return ChangeSet()
    if not is_node(name, node1):
        return ChangeSet()
    if not is_node(name, node2):
        return ChangeSet()
    if node1 == node2:
        return ChangeSet()
    if type != VALVES_TYPE_PRV and type != VALVES_TYPE_PSV and type != VALVES_TYPE_PBV and type != VALVES_TYPE_FCV and type != VALVES_TYPE_TCV and type != VALVES_TYPE_GPV:
        return ChangeSet()

    sql = f"insert into _link (id, type) values ('{id}', '{VALVE}');"
    sql += f"\ninsert into valves (id, node1, node2, diameter, type, setting, minor_loss) values ('{id}', '{node1}', '{node2}', {diameter}, '{type}', {setting}, {minor_loss});"

    undo = f"delete from valves where id = ''{id}'';"
    undo += f"\ndelete from _link where id = ''{id}'';"

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


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

    ps: dict[str, str] = {}
    ps['id'] = id
    ps['node1'] = row['node1']
    ps['node2'] = row['node2']
    ps['diameter'] = float(row['diameter'])
    ps['type'] = row['type']
    ps['setting'] = float(row['setting'])
    ps['minor_loss'] = float(row['minor_loss'])
    return ps


def set_valve(name: str, id: str, properties: dict[str, Any]) -> ChangeSet:
    if not is_valve(name, id):
        return ChangeSet()
    if 'node1' in properties:
        if not is_node(name, properties['node1']) or _get_valve_node2(name, id) == properties['node1']:
            return ChangeSet()
    if 'node2' in properties:
        if not is_node(name, properties['node2']) or _get_valve_node1(name, id) == properties['node2']:
            return ChangeSet()
    if 'node1' in properties and 'node2' in properties:
        if properties['node1'] == properties['node2']:
            return ChangeSet()
    if 'type' in properties:
        t = properties['type']
        if t != VALVES_TYPE_PRV and t != VALVES_TYPE_PSV and t != VALVES_TYPE_PBV and t != VALVES_TYPE_FCV and t != VALVES_TYPE_TCV and t != VALVES_TYPE_GPV:
            return ChangeSet()

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

    new = get_valve(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 valves set node1 = {new['node1']}, node2 = {new['node2']}, \
        diameter = {new['diameter']}, type = {new['type']}, setting = {new['setting']}, minor_loss = {new['minor_loss']} where id = '{id}';"
    undo = f"update valves set node1 = {old['node1']}, node2 = {old['node2']}, \
        diameter = {old['diameter']}, type = {old['type']}, setting = {old['setting']}, minor_loss = {old['minor_loss']} where id = ''{id}'';"

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


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

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

    sql = f"delete from valves where id = '{id}';"
    sql += f"\ndelete from _link where id = '{id}';"

    undo = f"insert into _link (id, type) values (''{id}'', ''{VALVE}'');"
    undo += f"\ninsert into valves (id, node1, node2, diameter, type, setting, minor_loss) \
        values (''{id}'', {old['node1']}, {old['node2']}, {old['diameter']}, {old['type']}, {old['setting']}, {old['minor_loss']});"

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

'''
def add_valve(name: str, id: str, node1: str, node2: str, diameter: float = 0, type: str = VALVES_TYPE_PRV, setting: float = 0, minor_loss: float = 0) -> ChangeSet:
    if not is_node(name, node1):
        return ChangeSet()
    if not is_node(name, node2):
        return ChangeSet()
    if node1 == node2:
        return ChangeSet()
    if type != VALVES_TYPE_PRV and type != VALVES_TYPE_PSV and type != VALVES_TYPE_PBV and type != VALVES_TYPE_FCV and type != VALVES_TYPE_TCV and type != VALVES_TYPE_GPV:
        return ChangeSet()

    sql = f"insert into valves (id, node1, node2, diameter, type, setting, minor_loss) values ('{id}', '{node1}', '{node2}', {diameter}, '{type}', {setting}, {minor_loss});"
    undo_sql = f'delete from valves where id = "{id}";'
    return add_link(name, VALVE, id, sql, undo_sql)


def _get_valve(name: str, id: str) -> Row | None:
    return query(name, f"select node1, node2, diameter, type, setting, minor_loss from valves where id = '{id}'")


def delete_valve(name: str, id: str) -> ChangeSet:
    if not is_valve(name, id):
        return ChangeSet()

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

    node1, node2, diameter, type, setting, minor_loss = row['node1'], row['node2'], row['diameter'], row['type'], row['setting'], row['minor_loss']

    sql = f"delete from valves where id = '{id}';"
    undo_sql = f'insert into valves (id, node1, node2, diameter, type, setting, minor_loss) values ("{id}", "{node1}", "{node2}", {diameter}, "{type}", {setting}, {minor_loss});'

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


def _get_valve_node1(name: str, id: str) -> str | None:
    row = _get_valve(name, id)
    return row['node1'] if row != None else None


def _get_valve_node2(name: str, id: str) -> str | None:
    row = _get_valve(name, id)
    return row['node2'] if row != None else None


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

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

    return update(name, VALVE, 'valves', 'id', id, key, key_type, row[key], value, optional)


def set_valve_node1(name: str, id: str, node1: str) -> ChangeSet:
    if not is_node(name, node1):
        return ChangeSet()
    if _get_valve_node2(name, id) == node1:
        return ChangeSet()

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


def set_valve_node2(name: str, id: str, node2: str) -> ChangeSet:
    if not is_node(name, node2):
        return ChangeSet()
    if _get_valve_node1(name, id) == node2:
        return ChangeSet()

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


def set_valve_diameter(name: str, id: str, diameter: float) -> ChangeSet:
    return _set_valve(name, id, 'diameter', 'float', str(diameter))


def set_valve_type(name: str, id: str, type: str) -> ChangeSet:
    if type != VALVES_TYPE_PRV and type != VALVES_TYPE_PSV and type != VALVES_TYPE_PBV and type != VALVES_TYPE_FCV and type != VALVES_TYPE_TCV and type != VALVES_TYPE_GPV:
        return ChangeSet()

    return _set_valve(name, id, 'type', 'str', type)


def set_valve_setting(name: str, id: str, setting: float) -> ChangeSet:
    return _set_valve(name, id, 'setting', 'float', str(setting))


def set_valve_minor_loss(name: str, id: str, minor_loss: float) -> ChangeSet:
    return _set_valve(name, id, 'minor_loss', 'float', str(minor_loss))


def get_valve_property_names(name: str) -> list[str]:
    return ['node1', 'node2', 'diameter', 'type', 'setting', 'minor_loss']


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

    ps: dict[str, str] = {}
    ps['node1'] = row['node1'] if row != None else None
    ps['node2'] = row['node2'] if row != None else None
    ps['diameter'] = float(row['diameter']) if row != None else None
    ps['type'] = row['type'] if row != None else None
    ps['setting'] = float(row['setting']) if row != None else None
    ps['minor_loss'] = float(row['minor_loss']) if row != None else None
    return ps
'''