import { type User, type InsertUser, type Label, type InsertLabel, type Task, type InsertTask } from "@shared/schema";
import { randomUUID } from "crypto";

// modify the interface with any CRUD methods
// you might need

export interface IStorage {
  getUser(id: string): Promise<User | undefined>;
  getUserByUsername(username: string): Promise<User | undefined>;
  createUser(user: InsertUser): Promise<User>;
  
  // Labels
  getAllLabels(): Promise<Label[]>;
  getLabel(id: string): Promise<Label | undefined>;
  createLabel(label: InsertLabel): Promise<Label>;
  updateLabel(id: string, updates: Partial<InsertLabel>): Promise<Label | undefined>;
  deleteLabel(id: string): Promise<boolean>;
  
  // Tasks
  getAllTasks(): Promise<Task[]>;
  getTask(id: string): Promise<Task | undefined>;
  createTask(task: InsertTask): Promise<Task>;
  updateTask(id: string, updates: Partial<InsertTask>): Promise<Task | undefined>;
  deleteTask(id: string): Promise<boolean>;
}

export class MemStorage implements IStorage {
  private users: Map<string, User>;
  private labels: Map<string, Label>;
  private tasks: Map<string, Task>;

  constructor() {
    this.users = new Map();
    this.labels = new Map();
    this.tasks = new Map();
    
    // Create some default labels
    this.createDefaultLabels();
  }

  private async createDefaultLabels() {
    // Use fixed IDs to prevent ID churn on server restarts
    const defaultLabels = [
      { id: 'cb44bed1-8ba3-43fe-9498-bb28e483ed1f', name: "Work", color: "#3B82F6" },
      { id: '274f0ba4-a133-471a-bbe9-8189aa3b0106', name: "Personal", color: "#10B981" },
      { id: '2e8c3aa0-278f-4220-b2c5-aa109b4279b7', name: "Urgent", color: "#EF4444" },
      { id: 'c5eccac9-7919-4eb1-bb50-badacad6b1c1', name: "Study", color: "#8B5CF6" },
    ];
    
    for (const label of defaultLabels) {
      this.labels.set(label.id, label);
    }
  }

  async getUser(id: string): Promise<User | undefined> {
    return this.users.get(id);
  }

  async getUserByUsername(username: string): Promise<User | undefined> {
    return Array.from(this.users.values()).find(
      (user) => user.username === username,
    );
  }

  async createUser(insertUser: InsertUser): Promise<User> {
    const id = randomUUID();
    const user: User = { ...insertUser, id };
    this.users.set(id, user);
    return user;
  }

  // Labels
  async getAllLabels(): Promise<Label[]> {
    return Array.from(this.labels.values());
  }

  async getLabel(id: string): Promise<Label | undefined> {
    return this.labels.get(id);
  }

  async createLabel(insertLabel: InsertLabel): Promise<Label> {
    const id = randomUUID();
    const label: Label = { ...insertLabel, id };
    this.labels.set(id, label);
    return label;
  }

  async updateLabel(id: string, updates: Partial<InsertLabel>): Promise<Label | undefined> {
    const existing = this.labels.get(id);
    if (!existing) return undefined;
    
    const updated: Label = { ...existing, ...updates };
    this.labels.set(id, updated);
    return updated;
  }

  async deleteLabel(id: string): Promise<boolean> {
    return this.labels.delete(id);
  }

  // Tasks
  async getAllTasks(): Promise<Task[]> {
    return Array.from(this.tasks.values());
  }

  async getTask(id: string): Promise<Task | undefined> {
    return this.tasks.get(id);
  }

  async createTask(insertTask: InsertTask): Promise<Task> {
    const id = randomUUID();
    const task: Task = { 
      id,
      title: insertTask.title,
      description: insertTask.description || null,
      status: insertTask.status || "todo",
      priority: insertTask.priority || "medium",
      dueDate: insertTask.dueDate || null,
      timeTracked: insertTask.timeTracked || 0,
      isTracking: insertTask.isTracking || false,
      projectId: insertTask.projectId || null,
      notes: insertTask.notes || null,
      labelId: insertTask.labelId || null,
    };
    this.tasks.set(id, task);
    return task;
  }

  async updateTask(id: string, updates: Partial<InsertTask>): Promise<Task | undefined> {
    const existing = this.tasks.get(id);
    if (!existing) return undefined;
    
    const updated: Task = { ...existing, ...updates };
    this.tasks.set(id, updated);
    return updated;
  }

  async deleteTask(id: string): Promise<boolean> {
    return this.tasks.delete(id);
  }
}

export const storage = new MemStorage();