/**
 * Infrastructure Adapter: InMemoryTeamMembershipRepository
 *
 * In-memory implementation of ITeamMembershipRepository.
 * Stores memberships and join requests in Map structures.
 */

import type {
  TeamMembership,
  TeamJoinRequest,
} from '@gridpilot/racing/domain/types/TeamMembership';
import type { ITeamMembershipRepository } from '@gridpilot/racing/domain/repositories/ITeamMembershipRepository';

export class InMemoryTeamMembershipRepository implements ITeamMembershipRepository {
  private membershipsByTeam: Map<string, TeamMembership[]>;
  private joinRequestsByTeam: Map<string, TeamJoinRequest[]>;

  constructor(seedMemberships?: TeamMembership[], seedJoinRequests?: TeamJoinRequest[]) {
    this.membershipsByTeam = new Map();
    this.joinRequestsByTeam = new Map();

    if (seedMemberships) {
      seedMemberships.forEach((membership) => {
        const list = this.membershipsByTeam.get(membership.teamId) ?? [];
        list.push(membership);
        this.membershipsByTeam.set(membership.teamId, list);
      });
    }

    if (seedJoinRequests) {
      seedJoinRequests.forEach((request) => {
        const list = this.joinRequestsByTeam.get(request.teamId) ?? [];
        list.push(request);
        this.joinRequestsByTeam.set(request.teamId, list);
      });
    }
  }

  private getMembershipList(teamId: string): TeamMembership[] {
    let list = this.membershipsByTeam.get(teamId);
    if (!list) {
      list = [];
      this.membershipsByTeam.set(teamId, list);
    }
    return list;
  }

  private getJoinRequestList(teamId: string): TeamJoinRequest[] {
    let list = this.joinRequestsByTeam.get(teamId);
    if (!list) {
      list = [];
      this.joinRequestsByTeam.set(teamId, list);
    }
    return list;
  }

  async getMembership(teamId: string, driverId: string): Promise<TeamMembership | null> {
    const list = this.membershipsByTeam.get(teamId);
    if (!list) return null;
    return list.find((m) => m.driverId === driverId) ?? null;
  }

  async getActiveMembershipForDriver(driverId: string): Promise<TeamMembership | null> {
    for (const list of this.membershipsByTeam.values()) {
      const membership = list.find(
        (m) => m.driverId === driverId && m.status === 'active',
      );
      if (membership) {
        return membership;
      }
    }
    return null;
  }

  async getTeamMembers(teamId: string): Promise<TeamMembership[]> {
    return [...(this.membershipsByTeam.get(teamId) ?? [])];
  }

  async countByTeamId(teamId: string): Promise<number> {
    const list = this.membershipsByTeam.get(teamId) ?? [];
    return list.filter((m) => m.status === 'active').length;
  }

  async saveMembership(membership: TeamMembership): Promise<TeamMembership> {
    const list = this.getMembershipList(membership.teamId);
    const existingIndex = list.findIndex(
      (m) => m.teamId === membership.teamId && m.driverId === membership.driverId,
    );

    if (existingIndex >= 0) {
      list[existingIndex] = membership;
    } else {
      list.push(membership);
    }

    this.membershipsByTeam.set(membership.teamId, list);
    return membership;
  }

  async removeMembership(teamId: string, driverId: string): Promise<void> {
    const list = this.membershipsByTeam.get(teamId);
    if (!list) {
      return;
    }
    const index = list.findIndex((m) => m.driverId === driverId);
    if (index >= 0) {
      list.splice(index, 1);
      this.membershipsByTeam.set(teamId, list);
    }
  }

  async getJoinRequests(teamId: string): Promise<TeamJoinRequest[]> {
    return [...(this.joinRequestsByTeam.get(teamId) ?? [])];
  }

  async saveJoinRequest(request: TeamJoinRequest): Promise<TeamJoinRequest> {
    const list = this.getJoinRequestList(request.teamId);
    const existingIndex = list.findIndex((r) => r.id === request.id);

    if (existingIndex >= 0) {
      list[existingIndex] = request;
    } else {
      list.push(request);
    }

    this.joinRequestsByTeam.set(request.teamId, list);
    return request;
  }

  async removeJoinRequest(requestId: string): Promise<void> {
    for (const [teamId, list] of this.joinRequestsByTeam.entries()) {
      const index = list.findIndex((r) => r.id === requestId);
      if (index >= 0) {
        list.splice(index, 1);
        this.joinRequestsByTeam.set(teamId, list);
        return;
      }
    }
  }
}