import {
    BadRequestException,
    Controller,
    Get,
    Inject,
    NotFoundException,
    Param,
    Query,
} from '@nestjs/common';
import { ApiPropertyOptional } from '@nestjs/swagger';
import { Type } from 'class-transformer';
import { IsIn, IsInt, IsOptional, IsString, Length } from 'class-validator';
import { EnrichedDataService, MovieData } from './types';

const ENTRY_TYPES = ['movie', 'series', 'episode'] as const;

class SearchDto {
    @ApiPropertyOptional()
    @IsString()
    @Length(1)
    @IsOptional()
    actors?: string;

    @ApiPropertyOptional()
    @IsString()
    @Length(2, 2)
    @IsOptional()
    availableLanguages?: string;

    @ApiPropertyOptional()
    @IsString()
    @Length(1)
    @IsOptional()
    directors?: string;

    @ApiPropertyOptional()
    @IsString()
    @Length(1)
    @IsOptional()
    localTitle?: string;

    @ApiPropertyOptional()
    @IsString()
    @Length(2, 2)
    @IsOptional()
    originalLanguage?: string;

    @ApiPropertyOptional()
    @IsString()
    @Length(1)
    @IsOptional()
    productionCountries?: string;

    @ApiPropertyOptional()
    @IsInt()
    @Type(() => Number)
    @IsOptional()
    productionYear?: number;

    @ApiPropertyOptional()
    @IsString()
    @Length(1)
    @IsOptional()
    studios?: string;

    @ApiPropertyOptional()
    @IsString()
    @Length(1)
    @IsOptional()
    title?: string;

    @ApiPropertyOptional()
    @IsString()
    @IsIn(ENTRY_TYPES)
    @IsOptional()
    type?: (typeof ENTRY_TYPES)[number];

    @ApiPropertyOptional()
    @IsString()
    @Length(1)
    @IsOptional()
    writers?: string;
}

@Controller('/api/movies')
export class MoviesController {
    constructor(
        @Inject('enrichedDataService')
        private readonly enrichedDataService: EnrichedDataService,
    ) {}

    @Get()
    searchMovies(@Query() query: SearchDto): MovieData[] {
        if (!Object.values(query).some((filterValue) => filterValue)) {
            throw new BadRequestException('Query should not be empty');
        }

        const result = this.enrichedDataService.getSearchResults(query);
        return result;
    }

    @Get(':id')
    getMovie(@Param('id') id: string): MovieData {
        const result = /^\d+$/.test(id)
            ? this.enrichedDataService.getMetadataByInternalId(parseInt(id, 10))
            : this.enrichedDataService.getMetadataByImdbId(id);

        if (!result) {
            throw new NotFoundException();
        }

        return result;
    }
}