import { Injectable } from "@angular/core";
import { HttpClient } from "@angular/common/http";
import { Observable } from "rxjs";
import { Page } from "../models/page";
import { Genre } from "../models/resources/genre";
import { IResource } from "../models/resources/resource";
import { Library } from "../models/resources/library";
import { LibraryItem } from "../models/resources/library-item";
import { map } from "rxjs/operators";
import { Season } from "../models/resources/season";
import { Episode } from "../models/resources/episode";
import { Font } from "../models/font";
import { People } from "../models/resources/people";
import { Show } from "../models/resources/show";
import { Studio } from "../models/resources/studio";

export interface ApiArgs
{
	sortBy?: string;
	limit?: number;
	afterID?: number;
	[key: string]: any;
}

class CrudApi<T extends IResource>
{
	constructor(protected client: HttpClient, private route: string) {}

	get(id: number | string): Observable<T>
	{
		return this.client.get<T>(`/api/${this.route}/${id}`);
	}

	protected ArgsAsQuery(args: ApiArgs): string
	{
		if (args == null)
			return "";
		const params: string = Object.keys(args).map(x => `${x}=${args[x]}`).join("&");

		return params ? `?${params}` : "";
	}

	getAll(args?: ApiArgs): Observable<Page<T>>
	{
		return this.client.get<Page<T>>(`/api/${this.route}${this.ArgsAsQuery(args)}`)
			.pipe(map(x => Object.assign(new Page<T>(), x)));
	}

	create(item: T): Observable<T>
	{
		return this.client.post<T>(`/api/${this.route}`, item);
	}

	edit(item: T): Observable<T>
	{
		return this.client.put<T>(`/api/${this.route}`, item);
	}

	delete(item: T): Observable<T>
	{
		return this.client.delete<T>(`/api/${this.route}/${item.slug}`);
	}

	search(name: string): Observable<T[]>
	{
		return this.client.get<T[]>(`/api/search/${name}/${this.route}`);
	}
}

@Injectable({
	providedIn: "root"
})
export class LibraryService extends CrudApi<Library>
{
	constructor(client: HttpClient)
	{
		super(client, "libraries");
	}
}

@Injectable({
	providedIn: "root"
})
export class LibraryItemService extends CrudApi<LibraryItem>
{
	constructor(client: HttpClient)
	{
		super(client, "items");
	}
}

@Injectable({
	providedIn: "root"
})
export class SeasonService extends CrudApi<Season>
{
	constructor(client: HttpClient)
	{
		super(client, "seasons");
	}

	getForShow(show: string | number, args?: ApiArgs): Observable<Page<Season>>
	{
		return this.client.get(`/api/show/${show}/seasons${this.ArgsAsQuery(args)}`)
			.pipe(map(x => Object.assign(new Page<Season>(), x)));
	}
}

@Injectable({
	providedIn: "root"
})
export class EpisodeService extends CrudApi<Episode>
{
	constructor(client: HttpClient)
	{
		super(client, "episodes");
	}

	getFromSeason(season: string | number, args?: ApiArgs): Observable<Page<Episode>>
	{
		return this.client.get(`/api/seasons/${season}/episodes${this.ArgsAsQuery(args)}`)
			.pipe(map(x => Object.assign(new Page<Episode>(), x)));
	}

	getFromSeasonNumber(show: string | number, seasonNumber: number, args?: ApiArgs): Observable<Page<Episode>>
	{
		return this.client.get(`/api/seasons/${show}-s${seasonNumber}/episodes${this.ArgsAsQuery(args)}`)
			.pipe(map(x => Object.assign(new Page<Episode>(), x)));
	}

	getFonts(id: string | number): Observable<Font[]>
	{
		return this.client.get<Font[]>(`/api/episodes/${id}/fonts`);
	}
}

@Injectable({
	providedIn: "root"
})
export class PeopleService extends CrudApi<People>
{
	constructor(client: HttpClient)
	{
		super(client, "people");
	}

	getFromShow(show: string | number, args?: ApiArgs): Observable<Page<People>>
	{
		return this.client.get<Page<People>>(`/api/shows/${show}/people${this.ArgsAsQuery(args)}`)
			.pipe(map(x => Object.assign(new Page<People>(), x)));
	}
}

@Injectable({
	providedIn: "root"
})
export class GenreService extends CrudApi<Genre>
{
	constructor(client: HttpClient)
	{
		super(client, "genres");
	}

	getFromShow(show: string | number, args?: ApiArgs): Observable<Page<Genre>>
	{
		return this.client.get<Page<Genre>>(`/api/shows/${show}/genres${this.ArgsAsQuery(args)}`)
			.pipe(map(x => Object.assign(new Page<Genre>(), x)));
	}
}

@Injectable({
	providedIn: "root"
})
export class ShowService extends CrudApi<Show>
{
	constructor(client: HttpClient)
	{
		super(client, "shows");
	}

	getForCollection(collection: string | number, args?: ApiArgs): Observable<Page<Show>>
	{
		return this.client.get<Page<Show>>(`/api/collections/${collection}/shows${this.ArgsAsQuery(args)}`)
			.pipe(map(x => Object.assign(new Page<Show>(), x)));
	}
}

@Injectable({
	providedIn: "root"
})
export class StudioService extends CrudApi<Studio>
{
	constructor(client: HttpClient)
	{
		super(client, "studios");
	}

	getForShow(show: string | number): Observable<Studio>
	{
		return this.client.get<Studio>(`/api/show/${show}/studio}`);
	}
}