import { state, saveState, genId } from '../state.js';
import { renderMainScreen } from '../render/main-screen.js';
import { showExerciseDialog } from '../modals/exercise-modal.js';

export function addExercise(workoutId) {
    const w = state.workouts.find(x => x.id === workoutId);
    showExerciseDialog(w.type, (name) => {
        if (!name) return;
        const ex = { id: genId(), name, sets: [] };
        w.exercises.push(ex);
        addToRef(name, w.type);
        state.expandedExerciseId = ex.id;
        saveState();
        renderMainScreen();
    });
}

export function addToRef(name, workoutType = '') {
    const normalizedName = name.trim().toLowerCase();
    const exists = state.exerciseRef.find(
        e => e.name.trim().toLowerCase() === normalizedName
    );
    if (!exists) {
        state.exerciseRef.push({
            id: genId(),
            name: name.trim(),
            workoutType,
        });
    } else if (!exists.workoutType && workoutType) {
        exists.workoutType = workoutType;
    }
}

export function toggleExercise(exerciseId) {
    state.expandedExerciseId =
        state.expandedExerciseId === exerciseId ? null : exerciseId;
    renderMainScreen();
}

export function deleteExercise(workoutId, exerciseId) {
    if (!confirm('Удалить упражнение?')) return;
    const w = state.workouts.find(x => x.id === workoutId);
    w.exercises = w.exercises.filter(e => e.id !== exerciseId);
    saveState();
    renderMainScreen();
}

export function getExerciseHistory(exerciseName) {
    const normalizedName = exerciseName.trim().toLowerCase();
    const history = [];
    for (const w of state.workouts) {
        for (const ex of w.exercises) {
            if (ex.name.trim().toLowerCase() === normalizedName && ex.sets.length > 0) {
                history.push({ date: w.startTime, sets: ex.sets });
            }
        }
    }
    history.sort((a, b) => new Date(b.date) - new Date(a.date));
    return history.slice(0, 3);
}

window.EL = { addExercise, toggleExercise, deleteExercise };