from .database import *


element_schema = {'type': 'str' , 'optional': True , 'readonly': False}


def get_reaction_schema(name: str) -> dict[str, dict[str, Any]]:
    return { 'ORDER BULK'            : element_schema,
             'ORDER WALL'            : element_schema,
             'ORDER TANK'            : element_schema,
             'GLOBAL BULK'           : element_schema,
             'GLOBAL WALL'           : element_schema,
             'LIMITING POTENTIAL'    : element_schema,
             'ROUGHNESS CORRELATION' : element_schema }


def get_reaction(name: str) -> dict[str, Any]:
    ts = read_all(name, f"select * from reactions")
    d = {}
    for e in ts:
        d[e['key']] = str(e['value'])
    return d


def _set_reaction(name: str, cs: ChangeSet) -> DbChangeSet:
    raw_old = get_reaction(name)

    old = {}
    new = {}

    new_dict = cs.operations[0]
    schema = get_reaction_schema(name)
    for key in schema.keys():
        if key in new_dict:
            old[key] = str(raw_old[key])
            new[key] = str(new_dict[key])

    redo_cs = g_update_prefix | { 'type' : 'reaction' }

    redo_sql = ''
    for key, value in new.items():
        if redo_sql != '':
            redo_sql += '\n'
        redo_sql += f"update reactions set value = '{value}' where key = '{key}';"
        redo_cs |= { key: value }

    undo_cs = g_update_prefix | { 'type' : 'reaction' }

    undo_sql = ''
    for key, value in old.items():
        if undo_sql != '':
            undo_sql += '\n'
        undo_sql += f"update reactions set value = '{value}' where key = '{key}';"
        undo_cs |= { key: value }

    return DbChangeSet(redo_sql, undo_sql, [redo_cs], [undo_cs])


def set_reaction(name: str, cs: ChangeSet) -> ChangeSet:
    return execute_command(name, _set_reaction(name, cs))


def get_pipe_reaction_schema(name: str) -> dict[str, dict[str, Any]]:
    return { 'pipe' : {'type': 'str'   , 'optional': False , 'readonly': True },
             'bulk' : {'type': 'float' , 'optional': True  , 'readonly': False},
             'wall' : {'type': 'float' , 'optional': True  , 'readonly': False} }


def get_pipe_reaction(name: str, pipe: str) -> dict[str, Any]:
    d = {}
    d['pipe'] = pipe
    pr = try_read(name, f"select * from reactions_pipe_bulk where pipe = '{pipe}'")
    d['bulk'] = float(pr['value']) if pr != None else None
    pr = try_read(name, f"select * from reactions_pipe_wall where pipe = '{pipe}'")
    d['wall'] = float(pr['value']) if pr != None else None
    return d


class PipeReaction(object):
    def __init__(self, input: dict[str, Any]) -> None:
        self.type = 'pipe_reaction'
        self.pipe = str(input['pipe'])
        self.bulk = float(input['bulk']) if 'bulk' in input and input['bulk'] != None else None
        self.wall = float(input['wall']) if 'wall' in input and input['wall'] != None else None

        self.f_type = f"'{self.type}'"
        self.f_pipe = f"'{self.pipe}'"
        self.f_bulk = self.bulk if self.bulk != None else 'null'
        self.f_wall = self.wall if self.wall != None else 'null'

    def as_dict(self) -> dict[str, Any]:
        return { 'type': self.type, 'pipe': self.pipe, 'bulk': self.bulk, 'wall': self.wall }


def _set_pipe_reaction(name: str, cs: ChangeSet) -> DbChangeSet:
    old = PipeReaction(get_pipe_reaction(name, cs.operations[0]['pipe']))
    raw_new = get_pipe_reaction(name, cs.operations[0]['pipe'])

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

    redo_sql = f"delete from reactions_pipe_bulk where pipe = {new.f_pipe};\ndelete from reactions_pipe_wall where pipe = {new.f_pipe};"
    if new.bulk != None:
        redo_sql += f"\ninsert into reactions_pipe_bulk (pipe, value) values ({new.f_pipe}, {new.f_bulk});"
    if new.wall != None:
        redo_sql += f"\ninsert into reactions_pipe_wall (pipe, value) values ({new.f_pipe}, {new.f_wall});"

    undo_sql = f"delete from reactions_pipe_bulk where pipe = {old.f_pipe};\ndelete from reactions_pipe_wall where pipe = {old.f_pipe};"
    if old.bulk != None:
        undo_sql += f"\ninsert into reactions_pipe_bulk (pipe, value) values ({old.f_pipe}, {old.f_bulk});"
    if old.wall != None:
        undo_sql += f"\ninsert into reactions_pipe_wall (pipe, value) values ({old.f_pipe}, {old.f_wall});"

    redo_cs = g_update_prefix | new.as_dict()
    undo_cs = g_update_prefix | old.as_dict()

    return DbChangeSet(redo_sql, undo_sql, [redo_cs], [undo_cs])


def set_pipe_reaction(name: str, cs: ChangeSet) -> ChangeSet:
    return execute_command(name, _set_pipe_reaction(name, cs))


def get_tank_reaction_schema(name: str) -> dict[str, dict[str, Any]]:
    return { 'tank'  : {'type': 'str'   , 'optional': False , 'readonly': True },
             'value' : {'type': 'float' , 'optional': True  , 'readonly': False} }


def get_tank_reaction(name: str, tank: str) -> dict[str, Any]:
    d = {}
    d['tank'] = tank
    pr = try_read(name, f"select * from reactions_tank where tank = '{tank}'")
    d['value'] = float(pr['value']) if pr != None else None
    return d


class TankReaction(object):
    def __init__(self, input: dict[str, Any]) -> None:
        self.type = 'tank_reaction'
        self.tank = str(input['tank'])
        self.value = float(input['value']) if 'value' in input and input['value'] != None else None

        self.f_type = f"'{self.type}'"
        self.f_tank = f"'{self.tank}'"
        self.f_value = self.value if self.value != None else 'null'

    def as_dict(self) -> dict[str, Any]:
        return { 'type': self.type, 'tank': self.tank, 'value': self.value }


def _set_tank_reaction(name: str, cs: ChangeSet) -> DbChangeSet:
    old = TankReaction(get_tank_reaction(name, cs.operations[0]['tank']))
    raw_new = get_tank_reaction(name, cs.operations[0]['tank'])

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

    redo_sql = f"delete from reactions_tank where tank = {new.f_tank};"
    if new.value != None:
        redo_sql += f"\ninsert into reactions_tank (tank, value) values ({new.f_tank}, {new.f_value});"

    undo_sql = f"delete from reactions_tank where tank = {old.f_tank};"
    if old.value != None:
        undo_sql += f"\ninsert into reactions_tank (tank, value) values ({old.f_tank}, {old.f_value});"

    redo_cs = g_update_prefix | new.as_dict()
    undo_cs = g_update_prefix | old.as_dict()

    return DbChangeSet(redo_sql, undo_sql, [redo_cs], [undo_cs])


def set_tank_reaction(name: str, cs: ChangeSet) -> ChangeSet:
    return execute_command(name, _set_tank_reaction(name, cs))


#--------------------------------------------------------------
# [EPA2][EPA3][IN][OUT]
#   ORDER     {BULK/WALL/TANK} value
#   GLOBAL    BULK             coeff
#   GLOBAL    WALL             coeff
#   BULK      link1  (link2)   coeff
#   WALL      link1  (link2)   coeff
#   TANK      node1  (node2)   coeff
#   LIMITING  POTENTIAL        value
#   ROUGHNESS CORRELATION      value
#--------------------------------------------------------------


def inp_in_reaction(line: str) -> str:
    tokens = line.split()
    token0 = tokens[0].upper()
    if token0 == 'BULK' or token0 == 'WALL':
        pipe = tokens[1]
        key = token0.lower()
        value = tokens[2]
        return str(f"insert into reactions_pipe_{key} (pipe, value) values ('{pipe}', {value});")

    elif token0 == 'TANK':
        tank = tokens[1]
        value = tokens[2]
        return str(f"insert into reactions_tank (tank, value) values ('{tank}', {value});")

    else:
        line = line.upper().strip()
        for key in get_reaction_schema('').keys():
            if line.startswith(key):
                value = line.removeprefix(key).strip()
                return str(f"update reactions set value = '{value}' where key = '{key}';")

    return str('')


def inp_out_reaction(name: str) -> list[str]:
    lines = []

    objs = read_all(name, f"select * from reactions")
    for obj in objs:
        key = obj['key']
        value = obj['value']
        lines.append(f'{key} {value}')

    objs = read_all(name, f"select * from reactions_pipe_bulk")
    for obj in objs:
        pipe = obj['pipe']
        value = obj['value']
        lines.append(f'BULK {pipe} {value}')

    objs = read_all(name, f"select * from reactions_pipe_wall")
    for obj in objs:
        pipe = obj['pipe']
        value = obj['value']
        lines.append(f'WALL {pipe} {value}')

    objs = read_all(name, f"select * from reactions_tank")
    for obj in objs:
        tank = obj['tank']
        value = obj['value']
        lines.append(f'TANK {tank} {value}')

    return lines


def delete_pipe_reaction_by_pipe(name: str, pipe: str) -> ChangeSet:
    row1 = try_read(name, f"select * from reactions_pipe_bulk where pipe = '{pipe}'")
    row2 = try_read(name, f"select * from reactions_pipe_wall where pipe = '{pipe}'")
    if row1 == None and row2 == None:
        return ChangeSet()
    return ChangeSet(g_update_prefix | {'type': 'pipe_reaction', 'pipe': pipe, 'bulk': None, 'wall': None})


def delete_tank_reaction_by_tank(name: str, tank: str) -> ChangeSet:
    row = try_read(name, f"select * from reactions_tank where tank = '{tank}'")
    if row == None:
        return ChangeSet()
    return ChangeSet(g_update_prefix | {'type': 'tank_reaction', 'tank': tank, 'value': None})