from .database import *
from .s0_base import *

SOURCE_TYPE_CONCEN = 'CONCEN'
SOURCE_TYPE_MASS = 'MASS'
SOURCE_TYPE_FLOWPACED = 'FLOWPACED'
SOURCE_TYPE_SETPOINT = 'SETPOINT'

def get_source_schema(name: str) -> dict[str, dict[str, Any]]:
    return { 'node'      : {'type': 'str'   , 'optional': False , 'readonly': True },
             's_type'    : {'type': 'str'   , 'optional': False , 'readonly': False},
             'strength'  : {'type': 'float' , 'optional': False , 'readonly': False},
             'pattern'   : {'type': 'str'   , 'optional': True ,  'readonly': False} }


def get_source(name: str, node: str) -> dict[str, Any]:
    s = try_read(name, f"select * from sources where node = '{node}'")
    if s == None:
        return {}
    d = {}
    d['node'] = str(s['node'])
    d['s_type'] = str(s['s_type'])
    d['strength'] = float(s['strength'])
    d['pattern'] = str(s['pattern']) if s['pattern'] != None else None
    return d


class Source(object):
    def __init__(self, input: dict[str, Any]) -> None:
        self.type = 'source'
        self.node = str(input['node'])
        self.s_type = str(input['s_type'])
        self.strength = float(input['strength'])
        self.pattern = str(input['pattern']) if 'pattern' in input and input['pattern'] != None else None

        self.f_type = f"'{self.type}'"
        self.f_node = f"'{self.node}'"
        self.f_s_type = f"'{self.s_type}'"
        self.f_strength = self.strength
        self.f_pattern = f"'{self.pattern}'" if self.pattern != None else 'null'

    def as_dict(self) -> dict[str, Any]:
        return { 'type': self.type, 'node': self.node, 's_type': self.s_type, 'strength': self.strength, 'pattern': self.pattern }

    def as_id_dict(self) -> dict[str, Any]:
        return { 'type': self.type, 'node': self.node }


def _set_source(name: str, cs: ChangeSet) -> DbChangeSet:
    old = Source(get_source(name, cs.operations[0]['node']))
    raw_new = get_source(name, cs.operations[0]['node'])

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

    redo_sql = f"update sources set s_type = {new.f_s_type}, strength = {new.f_strength}, pattern = {new.f_pattern} where node = {new.f_node};"
    undo_sql = f"update sources set s_type = {old.f_s_type}, strength = {old.f_strength}, pattern = {old.f_pattern} where node = {old.f_node};"

    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_source(name: str, cs: ChangeSet) -> ChangeSet:
    return execute_command(name, _set_source(name, cs))


def _add_source(name: str, cs: ChangeSet) -> DbChangeSet:
    new = Source(cs.operations[0])

    redo_sql = f"insert into sources (node, s_type, strength, pattern) values ({new.f_node}, {new.f_s_type}, {new.f_strength}, {new.f_pattern});"
    undo_sql = f"delete from sources where node = {new.f_node};"

    redo_cs = g_add_prefix | new.as_dict()
    undo_cs = g_delete_prefix | new.as_id_dict()

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


def add_source(name: str, cs: ChangeSet) -> ChangeSet:
    return execute_command(name, _add_source(name, cs))


def _delete_source(name: str, cs: ChangeSet) -> DbChangeSet:
    old = Source(get_source(name, cs.operations[0]['node']))

    redo_sql = f"delete from sources where node = {old.f_node};"
    undo_sql = f"insert into sources (node, s_type, strength, pattern) values ({old.f_node}, {old.f_s_type}, {old.f_strength}, {old.f_pattern});"

    redo_cs = g_delete_prefix | old.as_id_dict()
    undo_cs = g_add_prefix | old.as_dict()

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


def delete_source(name: str, cs: ChangeSet) -> ChangeSet:
    return execute_command(name, _delete_source(name, cs))


#--------------------------------------------------------------
# [EPA2][EPA3][IN][OUT]
#   node  sourcetype  quality  (pattern)
#--------------------------------------------------------------


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

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

    node = str(tokens[0])
    s_type = str(tokens[1].upper())
    strength = float(tokens[2])
    pattern = str(tokens[3]) if num_without_desc >= 4 else None
    pattern = f"'{pattern}'" if pattern != None else 'null'

    return str(f"insert into sources (node, s_type, strength, pattern) values ('{node}', '{s_type}', {strength}, {pattern});")


def inp_out_source(name: str) -> list[str]:
    lines = []
    objs = read_all(name, 'select * from sources')
    for obj in objs:
        node = obj['node']
        s_type = obj['s_type']
        strength = obj['strength']
        pattern = obj['pattern'] if obj['pattern'] != None else ''
        lines.append(f'{node} {s_type} {strength} {pattern}')
    return lines


def delete_source_by_node(name: str, node: str) -> ChangeSet:
    row = try_read(name, f"select * from sources where node = '{node}'")
    if row == None:
        return ChangeSet()
    return ChangeSet(g_delete_prefix | {'type' : 'source', 'node': node})


def unset_source_by_pattern(name: str, pattern: str) -> ChangeSet:
    cs = ChangeSet()

    rows = read_all(name, f"select node from sources where pattern = '{pattern}'")
    for row in rows:
        cs.append(g_update_prefix | {'type': 'source', 'node': row['node'], 'pattern': None})

    return cs