import { Observable } from "rxjs";
import { HttpClient } from "@angular/common/http";
import { inject, Injectable } from "@angular/core";

export interface Message {
    id: number;
    contenu: string;
    date: string;
    authorId: number;
    authorName: string;
}

export interface MemberWithRole {
    userId: number;
    username: string;
    roleId: number | null;
    roleLibelle: string | null;
}

export interface Discussion {
    id: number;
    name: string;
    isGroup: boolean;
    membersCount?: number;
    groupId?: number;
}

@Injectable({ providedIn: 'root' })
export class discussionsService {

    private http = inject(HttpClient);
    private apiUrl = 'http://localhost:5250/API';

    getDiscussions(): Observable<Discussion[]> {
        return this.http.get<Discussion[]>(`${this.apiUrl}/discussions/my`);
    }

    getMessages(discussionId: string): Observable<Message[]> {
        return this.http.get<Message[]>(`${this.apiUrl}/discussions/${discussionId}/messages`);
    }

    createPrivateDiscussion(username: string): Observable<Discussion> {
        return this.http.post<Discussion>(`${this.apiUrl}/discussions/private`, { username });
    }

    createGroupDiscussion(groupName: string, usernames: string[]): Observable<Discussion> {
        return this.http.post<Discussion>(`${this.apiUrl}/discussions/group`, { groupName, usernames });
    }

    getDiscussionMembers(discussionId: string): Observable<string[]> {
        return this.http.get<string[]>(`${this.apiUrl}/discussions/${discussionId}/members`);
    }

    getMembersWithRoles(discussionId: string): Observable<MemberWithRole[]> {
        return this.http.get<MemberWithRole[]>(`${this.apiUrl}/discussions/${discussionId}/members/roles`);
    }

    createRole(libelle: string): Observable<{ id: number, libelle: string }> {
        return this.http.post<{ id: number, libelle: string }>(`${this.apiUrl}/roles`, { libelle });
    }

    assignRole(groupId: number, userId: number, roleId: number): Observable<void> {
        return this.http.post<void>(`${this.apiUrl}/groups/${groupId}/members/${userId}/role`, { roleId });
    }
}