from .project import *
from .database import ChangeSet, write
from .sections import *
from .s1_title import inp_in_title_new
from .s2_junctions import inp_in_junction_new
from .s3_reservoirs import inp_in_reservoir_new
from .s4_tanks import inp_in_tank_new
from .s5_pipes import inp_in_pipe_new
from .s6_pumps import inp_in_pump_new
from .s7_valves import inp_in_valve_new
from .s11_patterns import inp_in_pattern_new
from .s12_curves import inp_in_curve_new
from .s13_controls import inp_in_control_new
from .s14_rules import inp_in_rule_new
from .s21_times import inp_in_time_new
from .s22_report import inp_in_report_new
from .s23_options import inp_in_option_new
from .s27_backdrop import inp_in_backdrop_new

_S = 'S'
_L = 'L'

_handler = {
    TITLE       : (_S, inp_in_title_new),
    JUNCTIONS   : (_L, inp_in_junction_new),
    RESERVOIRS  : (_L, inp_in_reservoir_new),
    TANKS       : (_L, inp_in_tank_new),
    PIPES       : (_L, inp_in_pipe_new),
    PUMPS       : (_L, inp_in_pump_new),
    VALVES      : (_L, inp_in_valve_new),
    TAGS        : (_L, None),
    DEMANDS     : (_L, None),
    STATUS      : (_L, None),
    PATTERNS    : (_L, inp_in_pattern_new),
    CURVES      : (_L, inp_in_curve_new),
    CONTROLS    : (_L, inp_in_control_new),
    RULES       : (_L, inp_in_rule_new),
    ENERGY      : (_L, None),
    EMITTERS    : (_L, None),
    QUALITY     : (_L, None),
    SOURCES     : (_L, None),
    REACTIONS   : (_L, None),
    MIXING      : (_L, None),
    TIMES       : (_S, inp_in_time_new),
    REPORT      : (_S, inp_in_report_new),
    OPTIONS     : (_S, inp_in_option_new),
    COORDINATES : (_L, None),
    VERTICES    : (_L, None),
    LABELS      : (_L, None),
    BACKDROP    : (_S, inp_in_backdrop_new),
    #END         : 'END',
}

_level_1 = [
    TITLE,
    PATTERNS,
    CURVES,
    CONTROLS,
    RULES,
    TIMES,
    REPORT,
    OPTIONS,
    BACKDROP,
]

_level_2 = [
    JUNCTIONS,
    RESERVOIRS,
    TANKS,
]

_level_3 = [
    PIPES,
    PUMPS,
    VALVES,
    DEMANDS,
    EMITTERS,
    QUALITY,
    SOURCES,
    MIXING,
    COORDINATES,
    LABELS,
]

_level_4 = [
    TAGS,
    STATUS,
    ENERGY,
    REACTIONS,
    VERTICES,
]


_UNKNOWN = 'UNKNOWN'


def _get_offset(inp: str) -> dict[str, list[int]]:
    offset: dict[str, list[int]] = {}

    with open(inp) as f:
        while True:
            line = f.readline()
            if not line:
                break

            line = line.strip()
            if line.startswith('['):
                for s in section_name:
                    if line.startswith(f'[{s}'):
                        if s not in offset:
                            offset[s] = []
                        offset[s].append(f.tell())
                        break

    return offset


def parse_file(project: str, inp: str) -> None:
    offset = _get_offset(inp)

    levels = _level_1 + _level_2 + _level_3 + _level_4

    # parse the whole section rather than line
    sections : dict[str, list[str]]= {}
    for [s, t] in _handler.items():
        if t[0] == _S:
            sections[s] = []

    pattern_desc_line = None
    curve_type_desc_line = None

    with open(inp) as f:
        for s in levels:
            if s not in offset:
                continue

            is_s = _handler[s][0] == _S
            handler = _handler[s][1]

            for ptr in offset[s]:
                f.seek(ptr)

                while True:
                    line = f.readline()
                    if not line:
                        break

                    line = line.strip()
                    if line == '' or line.startswith('['):
                        break

                    if is_s:
                        sections[s].append(line)
                    else:
                        if line.startswith(';'):
                            line = line.removeprefix(';')
                            if s == PATTERNS: # ;desc
                                pattern_desc_line = line
                            elif s == CURVES: # ;type: desc
                                curve_type_desc_line = line
                            continue

                        if s == PATTERNS:
                            if pattern_desc_line != None:
                                tokens = line.split()
                                write(project, f"insert into _pattern (id) values ('{tokens[0]}');")
                                pattern_desc_line = None
                        elif s == CURVES:
                            if curve_type_desc_line != None:
                                type_and_desc = curve_type_desc_line.split(':')
                                tokens = line.split()
                                write(project, f"insert into _curve (id, type) values ('{tokens[0]}', '{type_and_desc[0].strip()}');")
                                curve_type_desc_line = None

                        if handler != None:
                            handler(project, line)


                f.seek(0)

            if is_s and handler != None:
                handler(project, sections[s])


def parse_inp(project: str, inp: str) -> None:
    parse_file(project, inp)


def read_inp_new(project: str, inp: str) -> bool:
    if is_project_open(project):
       close_project(project)

    if have_project(project):
       delete_project(project)

    create_project(project)
    open_project(project)

    parse_inp(project, inp)

    '''try:
        parse_inp(project, inp)
    except:
        close_project(project)
        delete_project(project)
        return False'''

    close_project(project)
    return True


def import_inp_new(project: str, cs: ChangeSet) -> bool:
    if is_project_open(project):
       close_project(project)

    if have_project(project):
       delete_project(project)

    create_project(project)
    open_project(project)

    close_project(project)

    return True