import { WorkoutSession, ExerciseDef, ExerciseType, WorkoutSet, WorkoutPlan } from '../types';
import { api } from './api';

export const getSessions = async (userId: string): Promise<WorkoutSession[]> => {
  try {
    return await api.get('/sessions');
  } catch {
    return [];
  }
};

export const saveSession = async (userId: string, session: WorkoutSession): Promise<void> => {
  await api.post('/sessions', session);
};

export const deleteSession = async (userId: string, id: string): Promise<void> => {
  await api.delete(`/sessions/${id}`);
};

export const deleteAllUserData = (userId: string) => {
  // Not implemented in frontend
};

export const getExercises = async (userId: string): Promise<ExerciseDef[]> => {
  try {
    return await api.get('/exercises');
  } catch {
    return [];
  }
};

export const saveExercise = async (userId: string, exercise: ExerciseDef): Promise<void> => {
  await api.post('/exercises', exercise);
};

export const getLastSetForExercise = async (userId: string, exerciseId: string): Promise<WorkoutSet | undefined> => {
  // This requires fetching sessions or a specific endpoint.
  // For performance, we should probably have an endpoint for this.
  // For now, let's fetch sessions and find it client side, or implement endpoint later.
  // Given the async nature, we need to change the signature to Promise.
  // The caller needs to await this.
  const sessions = await getSessions(userId);
  for (const session of sessions) {
    for (let i = session.sets.length - 1; i >= 0; i--) {
      if (session.sets[i].exerciseId === exerciseId) {
        return session.sets[i];
      }
    }
  }
  return undefined;
}

export const getPlans = async (userId: string): Promise<WorkoutPlan[]> => {
  try {
    return await api.get('/plans');
  } catch {
    return [];
  }
};

export const savePlan = async (userId: string, plan: WorkoutPlan): Promise<void> => {
  await api.post('/plans', plan);
};

export const deletePlan = async (userId: string, id: string): Promise<void> => {
  await api.delete(`/plans/${id}`);
};