let goals = [];
let deleteGoalId = null;

async function loadGoals() {
    try {
        goals = await get("/api/goals");
        renderGoals();
    } catch (error) {
        console.error("Failed to load goals:", error);
    }
}

function renderGoals() {
    const container = document.getElementById("goals-list");
    
    if (goals.length === 0) {
        container.innerHTML = `
            <div class="empty-state">
                <h3>No goals yet</h3>
                <p>Create your first goal to get started!</p>
            </div>
        `;
        return;
    }

    container.innerHTML = goals.map(goal => `
        <div class="goal-card" data-goal-id="${goal.id}">
            <div class="goal-info">
                <div class="goal-title">${escapeHtml(goal.title)}</div>
                <div class="goal-status ${goal.activated ? 'active' : 'inactive'}">
                    ${goal.activated ? 'Active' : 'Inactive'}
                </div>
            </div>
            <div class="goal-actions">
                <button class="toggle-btn ${goal.activated ? 'deactivate' : 'activate'}" 
                        onclick="toggleGoal(${goal.id})">
                    ${goal.activated ? 'Deactivate' : 'Activate'}
                </button>
                <button class="edit-btn" onclick="editGoal(${goal.id})">Edit</button>
                <button class="delete-btn" onclick="confirmDelete(${goal.id})">Delete</button>
            </div>
        </div>
    `).join("");
}

function escapeHtml(text) {
    const div = document.createElement('div');
    div.textContent = text;
    return div.innerHTML;
}

function openModal(goal = null) {
    const modal = document.getElementById("goal-modal");
    const modalTitle = document.getElementById("modal-title");
    const goalId = document.getElementById("goal-id");
    const goalTitle = document.getElementById("goal-title");
    const error = document.getElementById("goal-error");
    
    error.textContent = "";
    
    if (goal) {
        modalTitle.textContent = "Edit Goal";
        goalId.value = goal.doc_id;
        goalTitle.value = goal.title;
    } else {
        modalTitle.textContent = "Create Goal";
        goalId.value = "";
        goalTitle.value = "";
    }
    
    modal.classList.add("active");
}

function closeModal() {
    document.getElementById("goal-modal").classList.remove("active");
}

async function handleGoalSubmit(event) {
    event.preventDefault();
    const error = document.getElementById("goal-error");
    error.textContent = "";
    
    const goalId = document.getElementById("goal-id").value;
    const title = document.getElementById("goal-title").value.trim();
    
    if (!title) {
        error.textContent = "Title is required";
        return;
    }
    
    try {
        if (goalId) {
            await put(`/api/goals/${goalId}`, { title });
        } else {
            await post("/api/goals", { title });
        }
        closeModal();
        await loadGoals();
    } catch (err) {
        error.textContent = err.message;
    }
}

async function toggleGoal(goalId) {
    try {
        await patch(`/api/goals/${goalId}/toggle`, {});
        await loadGoals();
    } catch (error) {
        console.error("Failed to toggle goal:", error);
    }
}

function editGoal(goalId) {
    const goal = goals.find(g => g.id === goalId);
    if (goal) {
        openModal(goal);
    }
}

function confirmDelete(goalId) {
    deleteGoalId = goalId;
    document.getElementById("delete-confirm-modal").classList.add("active");
}

function closeDeleteModal() {
    document.getElementById("delete-confirm-modal").classList.remove("active");
    deleteGoalId = null;
}

async function handleDelete() {
    if (!deleteGoalId) return;
    
    try {
        await del(`/api/goals/${deleteGoalId}`);
        closeDeleteModal();
        await loadGoals();
    } catch (error) {
        console.error("Failed to delete goal:", error);
    }
}

document.addEventListener("DOMContentLoaded", () => {
    document.getElementById("create-goal-btn").addEventListener("click", () => openModal());
    document.getElementById("modal-close").addEventListener("click", closeModal);
    document.getElementById("modal-cancel").addEventListener("click", closeModal);
    document.getElementById("goal-form").addEventListener("submit", handleGoalSubmit);
    document.getElementById("delete-modal-close").addEventListener("click", closeDeleteModal);
    document.getElementById("cancel-delete").addEventListener("click", closeDeleteModal);
    document.getElementById("confirm-delete").addEventListener("click", handleDelete);
    
    loadGoals();
});