from psycopg.rows import dict_row

from ..core.connection import project_connection
from ..core.database import read_all, sql_literal, try_read, write
from ..core.connection import project_connection
from ..model.elements import get_link_nodes
from psycopg.rows import dict_row

def sql_update_coord(node: str, x: float, y: float) -> str:
    geom = f"st_setsrid(st_makepoint({sql_literal(x)}, {sql_literal(y)}), 900914)"
    return f"update gis.node_geometries set geom = {geom} where node_id = {sql_literal(node)};"


def sql_insert_coord(node: str, x: float, y: float) -> str:
    geom = f"st_setsrid(st_makepoint({sql_literal(x)}, {sql_literal(y)}), 900914)"
    return f"insert into gis.node_geometries (node_id, geom) values ({sql_literal(node)}, {geom});"


def sql_delete_coord(node: str) -> str:
    return f"delete from gis.node_geometries where node_id = {sql_literal(node)};"


def from_postgis_point(coord: str) -> dict[str, float]:
    xy = coord.lower().removeprefix('point(').removesuffix(')').split(' ')
    return { 'x': float(xy[0]), 'y': float(xy[1]) }


def get_node_coord(name: str, node: str) -> dict[str, float]:
    row = try_read(
        name,
        "select st_astext(geom) as coord_geom from gis.node_geometries where node_id = %s",
        (node,),
    )
    if row == None:
        write(name, sql_insert_coord(node, 0.0, 0.0))
        return {'x': 0.0, 'y': 0.0}
    return from_postgis_point(row['coord_geom'])

# DingZQ 2025-01-03, get nodes in extent
# return node id list
# node_id:junction:x:y
def get_nodes_in_extent(name: str, x1: float, y1: float, x2: float, y2: float) -> list[str]:
    nodes = []
    objs = read_all(name, 'select node_id, st_astext(geom) as coord_geom from gis.node_geometries')
    for obj in objs:
        node_id = obj['node_id']
        coord = from_postgis_point(obj['coord_geom'])
        x = coord['x']
        y = coord['y']
        if x1 <= x <= x2 and y1 <= y <= y2:
            nodes.append(f"{node_id}:junction:{x}:{y}")
    return nodes

# DingZQ 2025-01-03, get links in extent
# return link id list   
# link_id:pipe:node_id1:node_id2   
def get_links_in_extent(name: str, x1: float, y1: float, x2: float, y2: float) -> list[str]:
    node_ids = set([s.split(':')[0] for s in get_nodes_in_extent(name, x1, y1, x2, y2)])

    all_link_ids = []
    with project_connection(name) as conn:
        with conn.cursor(row_factory=dict_row) as cur:
            cur.execute("select link_id from network.pipes")
            for record in cur:
                all_link_ids.append(record['link_id'])

    links = []
    for link_id in all_link_ids:
        nodes = get_link_nodes(name, link_id)
        if nodes[0] in node_ids and nodes[1] in node_ids:
            links.append(f"{link_id}:pipe:{nodes[0]}:{nodes[1]}")
    return links


def node_has_coord(name: str, node: str) -> bool:
    return try_read(
        name, "select node_id from gis.node_geometries where node_id = %s", (node,)
    ) != None


#--------------------------------------------------------------
# [EPA2][EPA3][IN][OUT]
#   id  x  y
#--------------------------------------------------------------
# exception ! need merge to node change set !


def inp_in_coord(line: str) -> str:
    tokens = line.split()
    node = tokens[0]
    x, y = float(tokens[1]), float(tokens[2])
    return sql_insert_coord(node, x, y)


def inp_out_coord(name: str) -> list[str]:
    lines = []
    objs = read_all(name, 'select node_id, st_astext(geom) as coord_geom from gis.node_geometries')
    for obj in objs:
        node = obj['node_id']
        coord = from_postgis_point(obj['coord_geom'])
        x = coord['x']
        y = coord['y']
        lines.append(f'{node} {x} {y}')
    return lines