#!/usr/bin/env python3.12

import os
import aiosqlite as sqlite3
from fastapi import FastAPI
from fastapi.responses import JSONResponse
from typing import Optional, LiteralString, Union
from .constructors import ValidShowEpisodeLineRequest, ValidShowEpisodeListRequest

class Transcriptions(FastAPI):
    """
    Transcription Endpoints
    """   
    def __init__(self, app: FastAPI, util, constants) -> None:  # pylint: disable=super-init-not-called
        self.app: FastAPI = app
        self.util = util
        self.constants = constants

        self.endpoints: dict = {
            "transcriptions/get_episodes": self.get_episodes_handler,
            "transcriptions/get_episode_lines": self.get_episode_lines_handler,
            #tbd
            }

        for endpoint, handler in self.endpoints.items():
            app.add_api_route(f"/{endpoint}", handler, methods=["POST"],
                              include_in_schema=True)
    
    async def get_episodes_handler(self, data: ValidShowEpisodeListRequest) -> JSONResponse:
        """
        Get list of episodes by show id
        """
        show_id: int = data.s
        db_path: Optional[Union[str, LiteralString]] = None
        db_query: Optional[str] = None
        show_title: Optional[str] = None
                    
        if not show_id:
            return JSONResponse(status_code=500, content={
                'err': True,
                'errorText': 'Invalid request',
            })
        
        show_id = int(show_id)
        
        if not(str(show_id).isnumeric()) or show_id not in [0, 1, 2]:
            return JSONResponse(status_code=500, content={
                'err': True,
                'errorText': 'Show not found.',
            })
        
        match show_id:
            case 0:
                db_path = os.path.join("/usr/local/share",                           
                                       "sqlite_dbs", "sp.db")
                db_query = """SELECT DISTINCT(("S" || Season || "E" || Episode || " " || Title)), ID FROM SP_DAT ORDER BY Season, Episode"""
                show_title = "South Park"
            case 1:
                db_path = os.path.join("/usr/local/share",                           
                                       "sqlite_dbs", "futur.db")
                db_query = """SELECT DISTINCT(("S" || EP_S || "E" || EP_EP || " " || EP_TITLE)), EP_ID FROM clean_dialog ORDER BY EP_S, EP_EP"""
                show_title = "Futurama"
            case 2:
                db_path = os.path.join("/usr/local/share",                           
                                       "sqlite_dbs", "parks.db")
                db_query = """SELECT DISTINCT(("S" || EP_S || "E" || EP_EP || " " || EP_TITLE)), EP_ID FROM clean_dialog ORDER BY EP_S, EP_EP"""
                show_title = "Parks And Rec"
            case _:
                return JSONResponse(status_code=500, content={
                    'err': True,
                    'errorText': 'Unknown error.',
                })
                
        async with sqlite3.connect(database=db_path, timeout=1) as _db:
            async with await _db.execute(db_query) as _cursor:
                result: list[tuple] = await _cursor.fetchall()
                return JSONResponse(content={
                    "show_title": show_title,
                    "episodes": [
                        {
                            'id': item[1],
                            'ep_friendly': item[0],
                            } for item in result],
                })
            
    async def get_episode_lines_handler(self, data: ValidShowEpisodeLineRequest) -> JSONResponse:
        """
        Get lines for a particular episode
        """
        show_id: int = int(data.s)
        episode_id: int = int(data.e)
        # pylint: disable=line-too-long
        match show_id:
            case 0:
                db_path: Union[str, LiteralString] = os.path.join("/usr/local/share",                           
                                       "sqlite_dbs", "sp.db")
                db_query: str = """SELECT ("S" || Season || "E" || Episode || " " || Title), Character, Line FROM SP_DAT WHERE ID = ?"""
            case 1:
                db_path = os.path.join("/usr/local/share",                           
                                       "sqlite_dbs", "futur.db")
                db_query = """SELECT ("S" || EP_S || "E" || EP_EP || " " || EP_TITLE || "<br><em>Opener: " || EP_OPENER || "</em>"), EP_LINE_SPEAKER, EP_LINE FROM clean_dialog WHERE EP_ID = ? ORDER BY LINE_ID ASC"""
            case 2:
                db_path = os.path.join("/usr/local/share",                           
                                       "sqlite_dbs", "parks.db")
                db_query = """SELECT ("S" || EP_S || "E" || EP_EP || " " || EP_TITLE), EP_LINE_SPEAKER, EP_LINE FROM clean_dialog WHERE EP_ID = ? ORDER BY id ASC"""
                
            case _:
                return JSONResponse(status_code=500, content={
                    'err': True,
                    'errorText': 'Unknown error',
                })
        
        async with sqlite3.connect(database=db_path,
                                   timeout=1) as _db:
            params: tuple = (episode_id,)
            async with await _db.execute(db_query, params) as _cursor:
                result: list[tuple] = await _cursor.fetchall()
                first_result: tuple = result[0]
                return JSONResponse(content={
                    'episode_id': episode_id,
                    'ep_friendly': first_result[0].strip(),
                    'lines': [
                        {
                            'speaker': item[1].strip(),
                            'line': item[2].strip(),
                            } for item in result],
                })