from typing import Any

from ..core.database import (
    ChangeSet,
    DatabaseCommand,
    execute_command,
    execute_locked_command,
    g_add_prefix,
    g_delete_prefix,
    g_update_prefix,
    read_all,
    sql_literal,
    try_read,
)


VALVES_TYPE_PRV = 'PRV'
VALVES_TYPE_PSV = 'PSV'
VALVES_TYPE_PBV = 'PBV'
VALVES_TYPE_FCV = 'FCV'
VALVES_TYPE_TCV = 'TCV'
VALVES_TYPE_GPV = 'GPV'


def get_valve_schema(name: str) -> dict[str, dict[str, Any]]:
    return { 'id'         : {'type': 'str'   , 'optional': False , 'readonly': True },
             'node1'      : {'type': 'str'   , 'optional': False , 'readonly': False},
             'node2'      : {'type': 'str'   , 'optional': False , 'readonly': False},
             'diameter'   : {'type': 'float' , 'optional': False , 'readonly': False},
             'v_type'     : {'type': 'str'   , 'optional': False , 'readonly': False},
             'setting'    : {'type': 'str'   , 'optional': False , 'readonly': False},
             'minor_loss' : {'type': 'float' , 'optional': False , 'readonly': False} }


def get_valve(name: str, id: str) -> dict[str, Any]:
    p = try_read(name, "select l.id, l.start_node_id as node1, l.end_node_id as node2, v.diameter, v.valve_type as v_type, v.setting, v.minor_loss from network.links l join network.valves v on v.link_id = l.id where l.id = %s", (id,))
    if p == None:
        return {}
    d = {}
    d['id'] = str(p['id'])
    d['node1'] = str(p['node1'])
    d['node2'] = str(p['node2'])
    d['diameter'] = float(p['diameter'])
    d['v_type'] = str(p['v_type'])
    d['setting'] = str(p['setting'])
    d['minor_loss'] = float(p['minor_loss'])
    return d

def get_all_valves(name: str) -> list[dict[str, Any]]:
    rows = read_all(
        name,
        "SELECT id, start_node_id AS node1, end_node_id AS node2, diameter, "
        "valve_type AS v_type, setting, minor_loss FROM gis.valves ORDER BY id",
    )
    if rows == None:
        return []

    result = []
    for row in rows:
        d = {}
        d['id'] = str(row['id'])
        d['node1'] = str(row['node1'])
        d['node2'] = str(row['node2'])
        d['diameter'] = float(row['diameter'])
        d['v_type'] = str(row['v_type'])
        d['setting'] = str(row['setting'])
        d['minor_loss'] = float(row['minor_loss'])
        result.append(d)

    return result




class Valve(object):
    def __init__(self, input: dict[str, Any]) -> None:
        self.type = 'valve'
        self.id = str(input['id'])
        self.node1 = str(input['node1'])
        self.node2 = str(input['node2'])
        self.diameter = float(input['diameter'])
        self.v_type = str(input['v_type'])
        self.setting = str(input['setting'])
        self.minor_loss = float(input['minor_loss'])

        self.f_type = sql_literal(self.type)
        self.f_id = sql_literal(self.id)
        self.f_node1 = sql_literal(self.node1)
        self.f_node2 = sql_literal(self.node2)
        self.f_diameter = sql_literal(self.diameter)
        self.f_v_type = sql_literal(self.v_type)
        self.f_setting = sql_literal(self.setting)
        self.f_minor_loss = sql_literal(self.minor_loss)

    def as_dict(self) -> dict[str, Any]:
        return { 'type': self.type, 'id': self.id, 'node1': self.node1, 'node2': self.node2, 'diameter': self.diameter, 'v_type': self.v_type, 'setting': self.setting, 'minor_loss': self.minor_loss }

def _set_valve(
    name: str,
    cs: ChangeSet,
    current: dict[str, Any] | None = None,
) -> DatabaseCommand:
    raw_new = current if current is not None else get_valve(name, cs.operations[0]['id'])

    new_dict = cs.operations[0]
    schema = get_valve_schema(name)
    for key, value in schema.items():
        if key in new_dict and not value['readonly']:
            raw_new[key] = new_dict[key]
    new = Valve(raw_new)

    statement = f"update network.links set start_node_id = {new.f_node1}, end_node_id = {new.f_node2} where id = {new.f_id};"
    statement += f"\nupdate network.valves set diameter = {new.f_diameter}, valve_type = {new.f_v_type}, setting = {new.f_setting}, minor_loss = {new.f_minor_loss} where link_id = {new.f_id};"
    change = g_update_prefix | new.as_dict()

    return DatabaseCommand(statement, [change])


def set_valve(name: str, cs: ChangeSet) -> ChangeSet:
    operation = cs.operations[0]
    if 'id' not in operation:
        return ChangeSet()

    def build_command() -> DatabaseCommand | None:
        current = get_valve(name, operation['id'])
        return None if current == {} else _set_valve(name, cs, current)

    return execute_locked_command(name, build_command)


def _add_valve(name: str, cs: ChangeSet) -> DatabaseCommand:
    new = Valve(cs.operations[0])

    statement = f"insert into network.links (id, link_type, start_node_id, end_node_id) values ({new.f_id}, {new.f_type}, {new.f_node1}, {new.f_node2});"
    statement += f"\ninsert into network.valves (link_id, diameter, valve_type, setting, minor_loss) values ({new.f_id}, {new.f_diameter}, {new.f_v_type}, {new.f_setting}, {new.f_minor_loss});"

    change = g_add_prefix | new.as_dict()

    return DatabaseCommand(statement, [change])


def add_valve(name: str, cs: ChangeSet) -> ChangeSet:
    if 'id' not in cs.operations[0]:
        return ChangeSet()
    if get_valve(name, cs.operations[0]['id']) != {}:
        return ChangeSet()
    return execute_command(name, _add_valve(name, cs))


def _delete_valve(name: str, cs: ChangeSet) -> DatabaseCommand:
    element_id = str(cs.operations[0]['id'])
    f_id = sql_literal(element_id)

    statement = f"delete from network.links where id = {f_id};"

    change = g_delete_prefix | {'type': 'valve', 'id': element_id}

    return DatabaseCommand(statement, [change])


def delete_valve(name: str, cs: ChangeSet) -> ChangeSet:
    if 'id' not in cs.operations[0]:
        return ChangeSet()
    if get_valve(name, cs.operations[0]['id']) == {}:
        return ChangeSet()
    return execute_command(name, _delete_valve(name, cs))


#--------------------------------------------------------------
# [EPA2][EPA3][IN][OUT]
#   id  node1  node2  diam  type  setting (lcoeff  lcurve)
#   for GPV, setting is string = head curve id
#   [NOT SUPPORT] for PCV, add loss curve if present
#--------------------------------------------------------------


def inp_in_valve(line: str) -> str:
    tokens = line.split()

    num = len(tokens)
    has_desc = tokens[-1].startswith(';')
    num_without_desc = (num - 1) if has_desc else num

    id = str(tokens[0])
    node1 = str(tokens[1])
    node2 = str(tokens[2])
    diameter = float(tokens[3])
    v_type = str(tokens[4].upper())
    setting = str(tokens[5])
    minor_loss = float(tokens[6]) if len(tokens) >= 7 else 0.0
    desc = str(tokens[-1]) if has_desc else None

    return str(f"insert into network.links (id, link_type, start_node_id, end_node_id) values ({sql_literal(id)}, 'valve', {sql_literal(node1)}, {sql_literal(node2)});insert into network.valves (link_id, diameter, valve_type, setting, minor_loss) values ({sql_literal(id)}, {sql_literal(diameter)}, {sql_literal(v_type)}, {sql_literal(setting)}, {sql_literal(minor_loss)});")


def inp_out_valve(name: str) -> list[str]:
    lines = []
    objs = read_all(name, 'select l.id, l.start_node_id as node1, l.end_node_id as node2, v.diameter, v.valve_type as v_type, v.setting, v.minor_loss from network.links l join network.valves v on v.link_id = l.id order by l.id')
    for obj in objs:
        id = obj['id']
        node1 = obj['node1']
        node2 = obj['node2']
        diameter = obj['diameter']
        v_type = obj['v_type']
        setting = obj['setting']
        minor_loss = obj['minor_loss']
        desc = ';'
        lines.append(f'{id} {node1} {node2} {diameter} {v_type} {setting} {minor_loss} {desc}')
    return lines