import { DEFAULT_STATE } from "../config/defaults";
import type {
  Agent,
  Department,
  Identity,
  Organization,
  StoreState,
  Supervisor,
  Team
} from "../models/types";
import { readJsonFile, writeJsonFile } from "../utils/fs";

export class JsonStore {
  private state: StoreState;

  constructor(private readonly filePath: string) {
    this.state = readJsonFile<StoreState>(filePath, DEFAULT_STATE);
  }

  save(): void {
    writeJsonFile(this.filePath, this.state);
  }

  snapshot(): StoreState {
    return JSON.parse(JSON.stringify(this.state)) as StoreState;
  }

  replace(state: StoreState): void {
    this.state = JSON.parse(JSON.stringify(state)) as StoreState;
    this.save();
  }

  addOrganization(org: Organization): Organization {
    this.state.organizations.push(org);
    this.save();
    return org;
  }

  addDepartment(dept: Department): Department {
    this.state.departments.push(dept);
    this.save();
    return dept;
  }

  renameDepartment(deptId: string, name: string): Department | undefined {
    const dept = this.findDepartment(deptId);
    if (!dept) return undefined;
    dept.name = name;
    this.save();
    return dept;
  }

  deleteDepartment(deptId: string): boolean {
    const before = this.state.departments.length;
    this.state.departments = this.state.departments.filter((d) => d.id !== deptId);
    this.state.teams = this.state.teams.filter((t) => t.deptId !== deptId);
    this.state.identities = this.state.identities.filter((i) => i.deptId !== deptId);
    const changed = this.state.departments.length !== before;
    if (changed) this.save();
    return changed;
  }

  addTeam(team: Team): Team {
    this.state.teams.push(team);
    this.save();
    return team;
  }

  renameTeam(teamId: string, name: string): Team | undefined {
    const team = this.findTeam(teamId);
    if (!team) return undefined;
    team.name = name;
    this.save();
    return team;
  }

  migrateTeam(teamId: string, newDeptId: string): Team | undefined {
    const team = this.findTeam(teamId);
    if (!team) return undefined;
    team.deptId = newDeptId;
    for (const identity of this.state.identities) {
      if (identity.teamId === teamId) identity.deptId = newDeptId;
    }
    this.save();
    return team;
  }

  deleteTeam(teamId: string): boolean {
    const before = this.state.teams.length;
    this.state.teams = this.state.teams.filter((t) => t.id !== teamId);
    this.state.identities = this.state.identities.filter((i) => i.teamId !== teamId);
    const changed = before !== this.state.teams.length;
    if (changed) this.save();
    return changed;
  }

  addAgent(agent: Agent): Agent {
    this.state.agents.push(agent);
    this.save();
    return agent;
  }

  addIdentity(identity: Identity): Identity {
    this.state.identities.push(identity);
    this.save();
    return identity;
  }

  upsertSupervisor(rel: Supervisor): Supervisor {
    const idx = this.state.supervisors.findIndex((x) => x.agentId === rel.agentId);
    if (idx >= 0) this.state.supervisors[idx] = rel;
    else this.state.supervisors.push(rel);
    this.save();
    return rel;
  }

  findAgent(agentId: string): Agent | undefined {
    return this.state.agents.find((a) => a.id === agentId);
  }

  findOrganization(orgId: string): Organization | undefined {
    return this.state.organizations.find((o) => o.id === orgId);
  }

  listOrganizations(): Organization[] {
    return this.state.organizations;
  }

  findDepartment(deptId: string): Department | undefined {
    return this.state.departments.find((d) => d.id === deptId);
  }

  listDepartments(): Department[] {
    return this.state.departments;
  }

  findTeam(teamId: string): Team | undefined {
    return this.state.teams.find((t) => t.id === teamId);
  }

  listTeams(): Team[] {
    return this.state.teams;
  }

  listAgents(): Agent[] {
    return this.state.agents;
  }

  listIdentities(): Identity[] {
    return this.state.identities;
  }

  findSupervisor(agentId: string): Supervisor | undefined {
    return this.state.supervisors.find((s) => s.agentId === agentId);
  }
}