from typing import Any

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


PIPE_STATUS_OPEN = 'OPEN'
PIPE_STATUS_CLOSED = 'CLOSED'
PIPE_STATUS_CV = 'CV'


def get_pipe_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},
             'length'     : {'type': 'float' , 'optional': False , 'readonly': False},
             'diameter'   : {'type': 'float' , 'optional': False , 'readonly': False},
             'roughness'  : {'type': 'float' , 'optional': False , 'readonly': False},
             'minor_loss' : {'type': 'float' , 'optional': False , 'readonly': False},
             'status'     : {'type': 'str'   , 'optional': False , 'readonly': False} }


def get_pipe(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, p.length, p.diameter, p.roughness, p.minor_loss, p.status from network.links l join network.pipes p on p.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['length'] = float(p['length'])
    d['diameter'] = float(p['diameter'])
    d['roughness'] = float(p['roughness'])
    d['minor_loss'] = float(p['minor_loss'])
    d['status'] = str(p['status'])
    return d

# DingZQ, 2025-03-29
def get_all_pipes(name: str) -> list[dict[str, Any]]:
    rows = read_all(
        name,
        "SELECT id, start_node_id AS node1, end_node_id AS node2, length, "
        "diameter, roughness, minor_loss, status FROM gis.pipes 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['length'] = float(row['length'])
        d['diameter'] = float(row['diameter'])
        d['roughness'] = float(row['roughness'])
        d['minor_loss'] = float(row['minor_loss'])
        d['status'] = str(row['status'])
        result.append(d)

    return result


def get_pipes_by_property(
    name: str,
    fields: list[str] | None = None,
    property_conditions: dict[str, Any] | None = None,
) -> list[dict[str, Any]]:
    if not fields:
        fields = [
            'id',
            'node1',
            'node2',
            'length',
            'diameter',
            'roughness',
            'minor_loss',
            'status',
        ]

    rows = read_all(
        name,
        "SELECT id, start_node_id AS node1, end_node_id AS node2, length, "
        "diameter, roughness, minor_loss, status FROM gis.pipes ORDER BY id",
    )
    if rows == None:
        return []

    result = []
    for row in rows:
        if property_conditions:
            matched = True
            for key, value in property_conditions.items():
                if row[key] != value:
                    matched = False
                    break
            if not matched:
                continue

        d = {}
        for field in fields:
            value = row[field]
            if field in ('length', 'diameter', 'roughness', 'minor_loss') and value is not None:
                d[field] = float(value)
            elif field in ('id', 'node1', 'node2', 'status') and value is not None:
                d[field] = str(value)
            else:
                d[field] = value
        result.append(d)

    return result

class Pipe(object):
    def __init__(self, input: dict[str, Any]) -> None:
        self.type = 'pipe'
        self.id = str(input['id'])
        self.node1 = str(input['node1'])
        self.node2 = str(input['node2'])
        self.length = float(input['length'])
        self.diameter = float(input['diameter'])
        self.roughness = float(input['roughness'])
        self.minor_loss = float(input['minor_loss'])
        self.status = str(input['status'])

        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_length = sql_literal(self.length)
        self.f_diameter = sql_literal(self.diameter)
        self.f_roughness = sql_literal(self.roughness)
        self.f_minor_loss = sql_literal(self.minor_loss)
        self.f_status = sql_literal(self.status)

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

def _set_pipe(name: str, cs: ChangeSet) -> DatabaseCommand:
    raw_new = get_pipe(name, cs.operations[0]['id'])

    new_dict = cs.operations[0]
    schema = get_pipe_schema(name)
    for key, value in schema.items():
        if key in new_dict and not value['readonly']:
            raw_new[key] = new_dict[key]
    new = Pipe(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.pipes set length = {new.f_length}, diameter = {new.f_diameter}, roughness = {new.f_roughness}, minor_loss = {new.f_minor_loss}, status = {new.f_status} where link_id = {new.f_id};"
    change = g_update_prefix | new.as_dict()

    return DatabaseCommand(statement, [change])


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


def _add_pipe(name: str, cs: ChangeSet) -> DatabaseCommand:
    new = Pipe(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.pipes (link_id, length, diameter, roughness, minor_loss, status) values ({new.f_id}, {new.f_length}, {new.f_diameter}, {new.f_roughness}, {new.f_minor_loss}, {new.f_status});"

    change = g_add_prefix | new.as_dict()

    return DatabaseCommand(statement, [change])


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


def _delete_pipe(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': 'pipe', 'id': element_id}

    return DatabaseCommand(statement, [change])


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


#--------------------------------------------------------------
# [EPA2][EPA3]
# [IN]
#   id  node1  node2  length  diam  rcoeff (lcoeff status) ;desc
# [OUT]
#   id  node1  node2  length  diam  rcoeff lcoeff (status) ;desc
#--------------------------------------------------------------


def inp_in_pipe(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])
    length = float(tokens[3])
    diameter = float(tokens[4])
    roughness = float(tokens[5])
    minor_loss = float(tokens[6])
    # status is must-have, here fix input
    status = str(tokens[7].upper()) if num_without_desc >= 8 else PIPE_STATUS_OPEN
    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)}, 'pipe', {sql_literal(node1)}, {sql_literal(node2)});insert into network.pipes (link_id, length, diameter, roughness, minor_loss, status) values ({sql_literal(id)}, {sql_literal(length)}, {sql_literal(diameter)}, {sql_literal(roughness)}, {sql_literal(minor_loss)}, {sql_literal(status)});")


def inp_out_pipe(name: str) -> list[str]:
    lines = []
    objs = read_all(name, 'select l.id, l.start_node_id as node1, l.end_node_id as node2, p.length, p.diameter, p.roughness, p.minor_loss, p.status from network.links l join network.pipes p on p.link_id = l.id order by l.id')
    for obj in objs:
        id = obj['id']
        node1 = obj['node1']
        node2 = obj['node2']
        length = obj['length']
        diameter = obj['diameter']
        roughness = obj['roughness']
        minor_loss = obj['minor_loss']
        status = obj['status']
        desc = ';'
        lines.append(f'{id} {node1} {node2} {length} {diameter} {roughness} {minor_loss} {status} {desc}')
    return lines