import enum
import itertools
import json

from sqlalchemy import text
from sqlalchemy.ext.asyncio import AsyncSession

from src.db.models.form_type import FormType


class DirectionEnum(str, enum.Enum):
    SUPPORT = "Support"
    DEVELOPMENT = "Development"

ACCEPTABLE_SHEETS = set(itertools.chain(*FormType.SHEETS_BY_FORM_TYPE.values()))
ACCEPTABLE_SECTIONS = set(itertools.chain(*FormType.SECTIONS_BY_FORM_TYPE.values()))



class SheetValidationError(Exception):

    def __init__(self, message, *args):
        super().__init__(*args)
        self.message = message


class SheetRepository:
    def __init__(self, db: AsyncSession):
        self.db = db

    async def get(
            self, 
            form_id: int, 
            sheet: str, 
            direction: str | None,
            sections: list[str] | None = None,
    ) -> list[tuple]:
        if any(
            [
                not isinstance(form_id, int),
                sheet not in ACCEPTABLE_SHEETS,
                direction is not None and direction not in [s.value for s in DirectionEnum],
                sections and (set(sections) - ACCEPTABLE_SECTIONS),
            ]
        ):
            raise SheetValidationError("Некорректные данные")


        if direction:
            func_query = "v3.v_form_view(:form_id, :sheet, :sections, :direction)"
        else:
            func_query = "v3.v_form_view(:form_id, :sheet, :sections)"
        
        return (
            await self.db.execute(
                text(
                    f"""
                        SELECT row_type, depth, sort_order, data 
                        FROM {func_query}
                    """
                ),
                {
                    "form_id": form_id,
                    "sheet": sheet,
                    "direction": direction,
                    "sections": sections,
                }
            )
        ).all()
    
    async def update_cell(
            self, 
            form_id: int, 
            sheet: str,
            direction: str | None,
            sections: list[str] | None,
            line_id: int, 
            column: str, 
            value: str | int | float | None = None, 
            user_id: int = None,
    ) -> list[tuple]:
        if any(
            [
                not isinstance(form_id, int),
                sheet not in ACCEPTABLE_SHEETS,
                direction is not None and direction not in [s.value for s in DirectionEnum],
                sections and (set(sections) - ACCEPTABLE_SECTIONS),
            ]
        ):
            raise SheetValidationError("Некорректные данные")
        if user_id:
            func_query = "v3.upd_form_cell(:form_id, :sheet, :line_id, :column, :value, :user_id, :direction, :sections)"
        else:
            func_query = "v3.upd_form_cell(:form_id, :sheet, :line_id, :column, :value, :direction, :sections)"

        return [
            tuple(r) for r in (
                await self.db.execute(
                    text(
                        f"""
                            SELECT row_type, depth, sort_order, data 
                            FROM {func_query}
                        """
                    ),
                    {
                        "form_id": form_id, 
                        "sheet": sheet,
                        "direction": direction,
                        "sections": sections,
                        "line_id": line_id, 
                        "column": column, 
                        "value": json.dumps(value), 
                        "user_id": user_id,
                    }
                )
            ).all()
        ]

    async def update_cells(
            self, 
            form_id: int, 
            sheet: str,
            direction: str | None,
            sections: list[str] | None,
            changes: list[dict],
            user_id: int = None,
    ) -> list[tuple]:
        if any(
            [
                not isinstance(form_id, int),
                sheet not in ACCEPTABLE_SHEETS,
                direction is not None and direction not in [s.value for s in DirectionEnum],
                sections and (set(sections) - ACCEPTABLE_SECTIONS),
            ]
        ):
            raise SheetValidationError("Некорректные данные")
        changes = json.dumps(changes)
        if user_id:
            func_query = "v3.upd_form_cells(:form_id, :sheet, :changes, :user_id, :direction, :sections)"
        else:
            func_query = "v3.upd_form_cells(:form_id, :sheet, :changes, :direction, :sections)"

        return [
            tuple(r) for r in (
                await self.db.execute(
                    text(
                        f"""
                            SELECT row_type, depth, sort_order, data 
                            FROM {func_query}
                        """
                    ),
                    {
                        "form_id": form_id, 
                        "sheet": sheet,
                        "direction": direction,
                        "sections": sections,
                        "changes": changes,
                        "user_id": user_id,
                    }
                )
            ).all()
        ]

    async def add_line(
            self,
            form_id: int,
            sheet: str,
            expense_item_id: int | None = None,
            item_id: str | None = None,
            section_code: str | None = None,
            direction: str | None = None,
            name: str | None = None,
            internal_order: str | None = None,
            vsp_id: int | None = None,
            project_id: int | None = None,
            justification: str | None = None,
            contract_number: str | None = None,
            contract_end_date: str | None = None,
            user_id: int | None = None,
    ) -> list[tuple]:
        return [
            tuple(r) for r in (
                await self.db.execute(
                    text(
                        """
                        SELECT row_type, depth, sort_order, data
                        FROM v3.add_budget_line(
                        :p_form_id,
                        :p_expense_item_id,
                        :p_sheet,
                        :p_item_id,
                        :p_section_code,
                        :p_direction,
                        :p_name,
                        :p_internal_order,
                        :p_vsp_id,
                        :p_project_id,
                        :p_justification,
                        :p_contract_number,
                        :p_contract_end_date
                        )
                        """
                    ),
                    {
                        "p_form_id": form_id,
                        "p_expense_item_id": expense_item_id,
                        "p_sheet": sheet,
                        "p_item_id": item_id,
                        "p_section_code": section_code,
                        "p_direction": direction,
                        "p_name": name,
                        "p_internal_order": internal_order,
                        "p_vsp_id": vsp_id,
                        "p_project_id": project_id,
                        "p_justification": justification,
                        "p_contract_number": contract_number,
                        "p_contract_end_date": contract_end_date,
                    }
                )
            ).all()
        ]

    async def delete_line(
            self,
            sheet: str,
            row_id: int,
            direction: str | None = None,
    ) -> list[tuple]:

        return [
            tuple(r) for r in (
                await self.db.execute(
                    text(
                        "SELECT row_type, depth, sort_order, data "
                        "FROM v3.del_budget_line(:p_row_id, :p_direction, :p_sheet)"
                    ),
                    {
                        "p_row_id": row_id,
                        "p_direction": direction,
                        "p_sheet": sheet,
                    }
                )
            ).all()
        ]