document.addEventListener('DOMContentLoaded', () => {
    // State
    const characterState = {
        name: '',
        age: 24,
        gender: 'Male',
        traits: [],
        points: 3,
        stats: {
            logic: 50,
            emotion: 50,
            id: 50,
            strength: 50,
            agility: 50,
            toughness: 50,
            perception: 50
        },
        beliefs: {
            collectivism: 50,
            loyalty: 20,
            rationality: 70,
            life: 40
        },
        background: {
            childhood: 'Vat-Grown Soldier',
            adulthood: 'Corporate Executive',
            skills: {
                melee: 4,
                ranged: 2,
                social: 3,
                intellectual: 5,
                crafting: 2,
                medicine: 0
            }
        }
    };
// Tab Switching Logic
    const tabBtns = document.querySelectorAll('.tab-btn');
    const tabContents = document.querySelectorAll('.tab-content');

    tabBtns.forEach(btn => {
        btn.addEventListener('click', () => {
            const target = btn.dataset.target;
            
            // Update buttons
            tabBtns.forEach(b => {
                b.classList.remove('text-neural-blue', 'border-b-2', 'border-neural-blue');
                b.classList.add('text-slate-500', 'border-transparent');
            });
            btn.classList.remove('text-slate-500', 'border-transparent');
            btn.classList.add('text-neural-blue', 'border-b-2', 'border-neural-blue');

            // Update content
            tabContents.forEach(content => {
                if (content.id === target) {
                    content.classList.remove('hidden');
                    // Trigger specific animations or logic per tab if needed
                    if (target === 'psychology') {
                        drawNeuralPreview();
                    }
                } else {
                    content.classList.add('hidden');
                }
            });
        });
    });

    // Trait Selection Logic
    const traitItems = document.querySelectorAll('.trait-item');
    const pointsDisplay = document.getElementById('trait-points');

    traitItems.forEach(item => {
        item.addEventListener('click', () => {
            const costText = item.querySelector('span.text-xs').innerText;
            const cost = parseInt(costText);
            const traitName = item.querySelector('h4').innerText;

            if (item.classList.contains('selected')) {
                // Deselect
                item.classList.remove('selected');
                characterState.traits = characterState.traits.filter(t => t !== traitName);
                characterState.points += cost;
            } else {
                // Select
                if (characterState.points - cost >= 0) {
                    item.classList.add('selected');
                    characterState.traits.push(traitName);
                    characterState.points -= cost;
                } else {
                    // Shake effect or error feedback could go here
                    console.log("Not enough points");
                }
            }
            pointsDisplay.innerText = characterState.points;
            updateNeuralPreview();
        });
    });
    // Character Name Input
    const charNameInput = document.getElementById('char-name');
    const charNameDisplay = document.getElementById('char-name-display');
    charNameInput.addEventListener('input', (e) => {
        characterState.name = e.target.value;
        charNameDisplay.innerText = e.target.value || 'Unknown';
    });

    // Age Slider
    const ageSlider = document.getElementById('char-age');
    const ageValue = document.getElementById('age-value');
    const ageDisplay = document.getElementById('char-age-display');
    ageSlider.addEventListener('input', (e) => {
        characterState.age = parseInt(e.target.value);
        ageValue.innerText = e.target.value;
        ageDisplay.innerText = e.target.value;
    });

    // Cognitive & Physical Stats Sliders
    const statControls = document.querySelectorAll('.stat-control');
    statControls.forEach(control => {
        const range = control.querySelector('input[type=range]');
        const display = control.querySelector('.value-display');
        const statName = control.dataset.stat;

        range.addEventListener('input', (e) => {
            const val = e.target.value;
            display.innerText = val + '%';
            characterState.stats[statName] = parseInt(val);
            updateNeuralPreview();
        });
    });

    // Childhood Selection
    const childhoodItems = document.querySelectorAll('.childhood-item');
    childhoodItems.forEach(item => {
        item.addEventListener('click', () => {
            childhoodItems.forEach(i => {
                i.classList.remove('selected');
                i.classList.remove('border-neural-blue', 'bg-slate-900/50');
                i.classList.add('border-slate-700', 'bg-slate-800');
                i.querySelector('.check-icon').setAttribute('data-feather', 'circle');
                i.querySelector('.check-icon').classList.remove('text-neural-blue');
                i.querySelector('.check-icon').classList.add('text-slate-600');
            });
            item.classList.add('selected');
            item.classList.remove('border-slate-700', 'bg-slate-800');
            item.classList.add('border-neural-blue', 'bg-slate-900/50');
            item.querySelector('.check-icon').setAttribute('data-feather', 'check-circle');
            item.querySelector('.check-icon').classList.add('text-neural-blue');
            item.querySelector('.check-icon').classList.remove('text-slate-600');
            
            characterState.background.childhood = item.querySelector('h4').innerText;
            updateSkills();
            feather.replace();
        });
    });

    // Adulthood Selection
    const adulthoodItems = document.querySelectorAll('.adulthood-item');
    adulthoodItems.forEach(item => {
        item.addEventListener('click', () => {
            adulthoodItems.forEach(i => {
                i.classList.remove('selected');
                i.classList.remove('border-neural-blue', 'bg-slate-900/50');
                i.classList.add('border-slate-700', 'bg-slate-800');
                i.querySelector('.check-icon').setAttribute('data-feather', 'circle');
                i.querySelector('.check-icon').classList.remove('text-neural-blue');
                i.querySelector('.check-icon').classList.add('text-slate-600');
            });
            item.classList.add('selected');
            item.classList.remove('border-slate-700', 'bg-slate-800');
            item.classList.add('border-neural-blue', 'bg-slate-900/50');
            item.querySelector('.check-icon').setAttribute('data-feather', 'check-circle');
            item.querySelector('.check-icon').classList.add('text-neural-blue');
            item.querySelector('.check-icon').classList.remove('text-slate-600');
            
            characterState.background.adulthood = item.querySelector('h4').innerText;
            updateSkills();
            feather.replace();
        });
    });

    // Update Skills Display based on background
    function updateSkills() {
        const skillsGrid = document.getElementById('skills-grid');
        if (!skillsGrid) return;

        // Base skills from childhood
        let skills = { melee: 0, ranged: 0, social: 0, intellectual: 0, crafting: 0, medicine: 0 };
        
        switch(characterState.background.childhood) {
            case 'Vat-Grown Soldier':
                skills.melee += 2; skills.ranged += 1; skills.social -= 2;
                break;
            case 'Street Urchin':
                skills.melee += 1;
                break;
            case 'Academic Prodigy':
                skills.intellectual += 3; skills.social += 1;
                break;
            case 'Farm Hand':
                skills.intellectual -= 1;
                break;
        }

        // Skills from adulthood
        switch(characterState.background.adulthood) {
            case 'Mercenary':
                skills.melee += 1; skills.ranged += 2;
                break;
            case 'Cyber-Surgeon':
                skills.medicine += 3; skills.crafting += 2;
                break;
            case 'Corporate Executive':
                skills.social += 3; skills.intellectual += 2;
                break;
            case 'Wasteland Scavenger':
                skills.crafting += 3; skills.melee += 1;
                break;
        }

        // Update display
        skillsGrid.innerHTML = `
            <div class="bg-slate-900 rounded p-3 text-center border border-slate-700">
                <div class="text-2xl mb-1">⚔️</div>
                <div class="text-xs text-slate-400">Melee</div>
                <div class="text-neural-blue font-bold">${Math.max(0, skills.melee)}</div>
            </div>
            <div class="bg-slate-900 rounded p-3 text-center border border-slate-700">
                <div class="text-2xl mb-1">🔫</div>
                <div class="text-xs text-slate-400">Ranged</div>
                <div class="text-neural-blue font-bold">${Math.max(0, skills.ranged)}</div>
            </div>
            <div class="bg-slate-900 rounded p-3 text-center border border-slate-700">
                <div class="text-2xl mb-1">💬</div>
                <div class="text-xs text-slate-400">Social</div>
                <div class="text-neural-blue font-bold">${Math.max(0, skills.social)}</div>
            </div>
            <div class="bg-slate-900 rounded p-3 text-center border border-slate-700">
                <div class="text-2xl mb-1">🧠</div>
                <div class="text-xs text-slate-400">Intellectual</div>
                <div class="text-neural-blue font-bold">${Math.max(0, skills.intellectual)}</div>
            </div>
            <div class="bg-slate-900 rounded p-3 text-center border border-slate-700">
                <div class="text-2xl mb-1">🔧</div>
                <div class="text-xs text-slate-400">Crafting</div>
                <div class="text-neural-blue font-bold">${Math.max(0, skills.crafting)}</div>
            </div>
            <div class="bg-slate-900 rounded p-3 text-center border border-slate-700">
                <div class="text-2xl mb-1">🩺</div>
                <div class="text-xs text-slate-400">Medicine</div>
                <div class="text-slate-500 font-bold">${Math.max(0, skills.medicine)}</div>
            </div>
        `;

        characterState.background.skills = skills;
    }
// Belief Sliders Logic (Visual only for now)
    const beliefSliders = document.querySelectorAll('.belief-slider input[type=range]');
    beliefSliders.forEach(slider => {
        slider.addEventListener('input', (e) => {
            const val = e.target.value;
            // Update the visual thumb position
            const thumb = e.target.parentElement.querySelector('div.absolute.rounded-full.shadow');
            thumb.style.left = val + '%';
        });
    });

    // Canvas Neural Preview Animation
    const canvas = document.getElementById('neural-preview');
    const ctx = canvas.getContext('2d');
    let animationId;

    function resizeCanvas() {
        if(canvas) {
            canvas.width = canvas.parentElement.offsetWidth;
            canvas.height = canvas.parentElement.offsetHeight;
            drawNeuralPreview();
        }
    }
    
    window.addEventListener('resize', resizeCanvas);

    class Node {
        constructor(x, y, type) {
            this.x = x;
            this.y = y;
            this.type = type; // 'center', 'satellite'
            this.radius = type === 'center' ? 15 : 4;
            this.baseX = x;
            this.baseY = y;
            this.offset = Math.random() * Math.PI * 2;
        }

        draw() {
            ctx.beginPath();
            ctx.arc(this.x, this.y, this.radius, 0, Math.PI * 2);
            
            if (this.type === 'center') {
                ctx.fillStyle = '#0ea5e9';
                ctx.shadowBlur = 20;
                ctx.shadowColor = '#0ea5e9';
            } else {
                ctx.fillStyle = '#94a3b8';
                ctx.shadowBlur = 0;
            }
            
            ctx.fill();
            ctx.closePath();
            ctx.shadowBlur = 0; // Reset
        }

        update(time) {
            if (this.type === 'satellite') {
                // Float gently
                this.x = this.baseX + Math.sin(time + this.offset) * 5;
                this.y = this.baseY + Math.cos(time + this.offset) * 5;
            }
        }
    }

    let nodes = [];

    function initNodes() {
        nodes = [];
        const cx = canvas.width / 2;
        const cy = canvas.height / 2;
        nodes.push(new Node(cx, cy, 'center'));

        // Create satellite nodes based on stats complexity
        const complexity = (characterState.stats.logic + characterState.stats.emotion) / 20;
        const count = 5 + Math.floor(complexity);

        for (let i = 0; i < count; i++) {
            const angle = (Math.PI * 2 / count) * i;
            const dist = 50 + Math.random() * 40;
            nodes.push(new Node(
                cx + Math.cos(angle) * dist,
                cy + Math.sin(angle) * dist,
                'satellite'
            ));
        }
    }

    function drawNeuralPreview() {
        if (!ctx) return;
        
        const time = Date.now() * 0.002;
        
        ctx.clearRect(0, 0, canvas.width, canvas.height);
        
        // Draw Connections
        ctx.strokeStyle = 'rgba(56, 189, 248, 0.2)';
        ctx.lineWidth = 1;
        
        if (nodes.length > 0) {
            const center = nodes[0];
            
            for (let i = 1; i < nodes.length; i++) {
                ctx.beginPath();
                ctx.moveTo(center.x, center.y);
                ctx.lineTo(nodes[i].x, nodes[i].y);
                ctx.stroke();

                // Draw inter-satellite connections occasionally
                if (i < nodes.length - 1) {
                     ctx.beginPath();
                     ctx.moveTo(nodes[i].x, nodes[i].y);
                     ctx.lineTo(nodes[i+1].x, nodes[i+1].y);
                     ctx.stroke();
                }
            }
        }

        // Draw Nodes
        nodes.forEach(node => {
            node.update(time);
            node.draw();
        });

        animationId = requestAnimationFrame(drawNeuralPreview);
    }

    function updateNeuralPreview() {
        // Re-init nodes based on stats changes
        initNodes();
    }
    // Initialize
    setTimeout(() => {
        resizeCanvas();
        initNodes();
        drawNeuralPreview();
    }, 100);

    // Save character data to localStorage when navigating to game
    const beginSimulationBtn = document.querySelector('aside a[href="game.html"]');
    if (beginSimulationBtn) {
        beginSimulationBtn.addEventListener('click', () => {
            localStorage.setItem('neuroscape-character', JSON.stringify(characterState));
        });
    }
});