/**
 * UI Bindings - Verbindet HTML-Elemente mit dem State
 */

var UiBindings = {
    elements: {},

    init: function() {
        this.cacheElements();
        this.bindEvents();
        this.syncFromState();
        this.updateVisibility();
        this.updatePreview();
        this.updateStandaloneArrowPreview();
    },

    cacheElements: function() {
        var e = this.elements;

        // Text & Farben
        e.textInput = document.getElementById('textInput');
        e.fontSizeInput = document.getElementById('fontSize');
        e.fontSizeValue = document.getElementById('fontSizeValue');
        e.textColorInput = document.getElementById('textColor');
        e.frameColorInput = document.getElementById('frameColor');

        // Rahmen
        e.frameScaleInput = document.getElementById('frameScale');
        e.frameScaleValue = document.getElementById('frameScaleValue');
        e.frameScaleRow = document.getElementById('frameScaleRow');

        // Padding
        e.paddingAllInput = document.getElementById('framePaddingAll');
        e.paddingAllValue = document.getElementById('framePaddingAllValue');
        e.paddingTopInput = document.getElementById('framePaddingTop');
        e.paddingTopValue = document.getElementById('framePaddingTopValue');
        e.paddingRightInput = document.getElementById('framePaddingRight');
        e.paddingRightValue = document.getElementById('framePaddingRightValue');
        e.paddingBottomInput = document.getElementById('framePaddingBottom');
        e.paddingBottomValue = document.getElementById('framePaddingBottomValue');
        e.paddingLeftInput = document.getElementById('framePaddingLeft');
        e.paddingLeftValue = document.getElementById('framePaddingLeftValue');
        e.paddingAllRow = document.getElementById('framePaddingAllRow');
        e.paddingRow = document.getElementById('framePaddingRow');

        // Pfeil
        e.arrowLengthInput = document.getElementById('arrowLength');
        e.arrowLengthValue = document.getElementById('arrowLengthValue');
        e.arrowAngleInput = document.getElementById('arrowAngle');
        e.arrowAngleValue = document.getElementById('arrowAngleValue');
        e.arrowBendInput = document.getElementById('arrowBend');
        e.arrowBendValue = document.getElementById('arrowBendValue');
        e.arrowSizeInput = document.getElementById('arrowSize');
        e.arrowSizeValue = document.getElementById('arrowSizeValue');
        e.arrowTipLengthInput = document.getElementById('arrowTipLength');
        e.arrowTipLengthValue = document.getElementById('arrowTipLengthValue');
        e.arrowDetailsRow = document.getElementById('arrowDetailsRow');
        e.arrowDetailsRow2 = document.getElementById('arrowDetailsRow2');

        // Vorschau
        e.textPreview = document.getElementById('textPreview');
        e.standaloneArrowPreview = document.getElementById('standaloneArrowPreview');

        // Buttons
        e.shapeButtons = document.querySelectorAll('.shape-btn');
        e.arrowButtons = document.querySelectorAll('.arrow-btn');
        e.lineStyleButtons = document.querySelectorAll('.line-style-btn');
        e.lineWeightButtons = document.querySelectorAll('.line-weight-btn');
    },

    bindEvents: function() {
        var self = this;
        var e = this.elements;
        var state = window.TextGenState;

        // Text-Input
        if (e.textInput) {
            e.textInput.addEventListener('input', function(ev) {
                state.set('text', ev.target.value);
                self.updatePreview();
            });
        }

        // Schriftgroesse
        if (e.fontSizeInput) {
            e.fontSizeInput.addEventListener('input', function(ev) {
                var val = parseInt(ev.target.value);
                state.set('fontSize', val);
                if (e.fontSizeValue) e.fontSizeValue.textContent = val + 'px';
                self.updatePreview();
            });
        }

        // Farben
        if (e.textColorInput) {
            e.textColorInput.addEventListener('input', function(ev) {
                state.set('textColor', ev.target.value);
                self.updatePreview();
            });
        }
        if (e.frameColorInput) {
            e.frameColorInput.addEventListener('input', function(ev) {
                state.set('frameColor', ev.target.value);
                self.updatePreview();
            });
        }

        // Rahmen-Skalierung
        if (e.frameScaleInput) {
            e.frameScaleInput.addEventListener('input', function(ev) {
                var val = parseInt(ev.target.value);
                state.set('frameScale', val);
                if (e.frameScaleValue) e.frameScaleValue.textContent = val + '%';
                self.updatePreview();
            });
        }

        // Gesamt-Padding
        if (e.paddingAllInput) {
            e.paddingAllInput.addEventListener('input', function(ev) {
                var val = parseInt(ev.target.value);
                state.setMultiple({
                    paddingTop: val,
                    paddingRight: val,
                    paddingBottom: val,
                    paddingLeft: val
                });
                if (e.paddingAllValue) e.paddingAllValue.textContent = val + 'px';
                // Einzelne Slider synchronisieren
                if (e.paddingTopInput) e.paddingTopInput.value = val;
                if (e.paddingTopValue) e.paddingTopValue.textContent = val + 'px';
                if (e.paddingRightInput) e.paddingRightInput.value = val;
                if (e.paddingRightValue) e.paddingRightValue.textContent = val + 'px';
                if (e.paddingBottomInput) e.paddingBottomInput.value = val;
                if (e.paddingBottomValue) e.paddingBottomValue.textContent = val + 'px';
                if (e.paddingLeftInput) e.paddingLeftInput.value = val;
                if (e.paddingLeftValue) e.paddingLeftValue.textContent = val + 'px';
                self.updatePreview();
            });
        }

        // Einzelne Paddings
        this.bindPaddingSlider('paddingTopInput', 'paddingTopValue', 'paddingTop');
        this.bindPaddingSlider('paddingRightInput', 'paddingRightValue', 'paddingRight');
        this.bindPaddingSlider('paddingBottomInput', 'paddingBottomValue', 'paddingBottom');
        this.bindPaddingSlider('paddingLeftInput', 'paddingLeftValue', 'paddingLeft');

        // Pfeil-Slider
        this.bindSlider('arrowLengthInput', 'arrowLengthValue', 'arrowLength', 'px');
        this.bindSlider('arrowAngleInput', 'arrowAngleValue', 'arrowAngle', '\u00B0');
        this.bindSlider('arrowBendInput', 'arrowBendValue', 'arrowBend', '%');
        this.bindSlider('arrowSizeInput', 'arrowSizeValue', 'arrowSize', 'px');
        this.bindSlider('arrowTipLengthInput', 'arrowTipLengthValue', 'arrowTipLength', 'px');

        // Shape-Buttons
        e.shapeButtons.forEach(function(btn) {
            btn.addEventListener('click', function() {
                e.shapeButtons.forEach(function(b) { b.classList.remove('active'); });
                btn.classList.add('active');
                state.set('shape', btn.dataset.shape);
                self.updateVisibility();
                self.updatePreview();
            });
        });

        // Arrow-Buttons
        e.arrowButtons.forEach(function(btn) {
            btn.addEventListener('click', function() {
                e.arrowButtons.forEach(function(b) { b.classList.remove('active'); });
                btn.classList.add('active');
                state.set('arrow', btn.dataset.arrow);
                self.updateVisibility();
                self.updatePreview();
                self.updateStandaloneArrowPreview();
            });
        });

        // Line-Style-Buttons
        e.lineStyleButtons.forEach(function(btn) {
            btn.addEventListener('click', function() {
                e.lineStyleButtons.forEach(function(b) { b.classList.remove('active'); });
                btn.classList.add('active');
                state.set('lineStyle', btn.dataset.style);
                self.updatePreview();
            });
        });

        // Line-Weight-Buttons
        e.lineWeightButtons.forEach(function(btn) {
            btn.addEventListener('click', function() {
                e.lineWeightButtons.forEach(function(b) { b.classList.remove('active'); });
                btn.classList.add('active');
                state.set('lineWeight', parseInt(btn.dataset.weight));
                self.updatePreview();
            });
        });
    },

    bindSlider: function(inputKey, valueKey, stateKey, unit) {
        var self = this;
        var input = this.elements[inputKey];
        var valueEl = this.elements[valueKey];
        var state = window.TextGenState;

        if (input) {
            input.addEventListener('input', function(ev) {
                var val = parseInt(ev.target.value);
                state.set(stateKey, val);
                if (valueEl) valueEl.textContent = val + unit;
                self.updatePreview();
                if (stateKey.indexOf('arrow') === 0) {
                    self.updateStandaloneArrowPreview();
                }
            });
        }
    },

    bindPaddingSlider: function(inputKey, valueKey, stateKey) {
        var self = this;
        var input = this.elements[inputKey];
        var valueEl = this.elements[valueKey];
        var state = window.TextGenState;

        if (input) {
            input.addEventListener('input', function(ev) {
                var val = parseInt(ev.target.value);
                state.set(stateKey, val);
                if (valueEl) valueEl.textContent = val + 'px';
                self.updatePreview();
            });
        }
    },

    syncFromState: function() {
        var e = this.elements;
        var s = window.TextGenState.current;

        if (e.textInput) e.textInput.value = s.text;
        if (e.fontSizeInput) e.fontSizeInput.value = s.fontSize;
        if (e.fontSizeValue) e.fontSizeValue.textContent = s.fontSize + 'px';
        if (e.textColorInput) e.textColorInput.value = s.textColor;
        if (e.frameColorInput) e.frameColorInput.value = s.frameColor;
        if (e.frameScaleInput) e.frameScaleInput.value = s.frameScale;
        if (e.frameScaleValue) e.frameScaleValue.textContent = s.frameScale + '%';

        // Padding
        if (e.paddingAllInput) e.paddingAllInput.value = s.paddingTop;
        if (e.paddingAllValue) e.paddingAllValue.textContent = s.paddingTop + 'px';
        if (e.paddingTopInput) e.paddingTopInput.value = s.paddingTop;
        if (e.paddingTopValue) e.paddingTopValue.textContent = s.paddingTop + 'px';
        if (e.paddingRightInput) e.paddingRightInput.value = s.paddingRight;
        if (e.paddingRightValue) e.paddingRightValue.textContent = s.paddingRight + 'px';
        if (e.paddingBottomInput) e.paddingBottomInput.value = s.paddingBottom;
        if (e.paddingBottomValue) e.paddingBottomValue.textContent = s.paddingBottom + 'px';
        if (e.paddingLeftInput) e.paddingLeftInput.value = s.paddingLeft;
        if (e.paddingLeftValue) e.paddingLeftValue.textContent = s.paddingLeft + 'px';

        // Pfeil
        if (e.arrowLengthInput) e.arrowLengthInput.value = s.arrowLength;
        if (e.arrowLengthValue) e.arrowLengthValue.textContent = s.arrowLength + 'px';
        if (e.arrowAngleInput) e.arrowAngleInput.value = s.arrowAngle;
        if (e.arrowAngleValue) e.arrowAngleValue.textContent = s.arrowAngle + '\u00B0';
        if (e.arrowBendInput) e.arrowBendInput.value = s.arrowBend;
        if (e.arrowBendValue) e.arrowBendValue.textContent = s.arrowBend + '%';
        if (e.arrowSizeInput) e.arrowSizeInput.value = s.arrowSize;
        if (e.arrowSizeValue) e.arrowSizeValue.textContent = s.arrowSize + 'px';
        if (e.arrowTipLengthInput) e.arrowTipLengthInput.value = s.arrowTipLength;
        if (e.arrowTipLengthValue) e.arrowTipLengthValue.textContent = s.arrowTipLength + 'px';

        // Buttons aktivieren
        this.activateButton(e.shapeButtons, 'shape', s.shape);
        this.activateButton(e.arrowButtons, 'arrow', s.arrow);
        this.activateButton(e.lineStyleButtons, 'style', s.lineStyle);
        this.activateButtonByValue(e.lineWeightButtons, 'weight', s.lineWeight);
    },

    activateButton: function(buttons, dataAttr, value) {
        buttons.forEach(function(btn) {
            btn.classList.remove('active');
            if (btn.dataset[dataAttr] === value) {
                btn.classList.add('active');
            }
        });
    },

    activateButtonByValue: function(buttons, dataAttr, value) {
        buttons.forEach(function(btn) {
            btn.classList.remove('active');
            if (parseInt(btn.dataset[dataAttr]) === value) {
                btn.classList.add('active');
            }
        });
    },

    updateVisibility: function() {
        var e = this.elements;
        var s = window.TextGenState.current;
        var hasShape = s.shape !== 'none';
        var hasArrow = s.arrow !== 'none';

        if (e.frameScaleRow) e.frameScaleRow.style.display = hasShape ? 'flex' : 'none';
        if (e.paddingAllRow) e.paddingAllRow.style.display = hasShape ? 'flex' : 'none';
        if (e.paddingRow) e.paddingRow.style.display = hasShape ? 'flex' : 'none';
        if (e.arrowDetailsRow) e.arrowDetailsRow.style.display = hasArrow ? 'flex' : 'none';
        if (e.arrowDetailsRow2) e.arrowDetailsRow2.style.display = hasArrow ? 'flex' : 'none';
    },

    updatePreview: function() {
        var e = this.elements;
        if (e.textPreview && window.SvgGenerator) {
            var svg = window.SvgGenerator.generate(window.TextGenState.current);
            e.textPreview.innerHTML = svg;
        }
    },

    updateStandaloneArrowPreview: function() {
        var e = this.elements;
        var s = window.TextGenState.current;

        if (!e.standaloneArrowPreview) return;

        if (s.arrow === 'none') {
            e.standaloneArrowPreview.innerHTML = '<p style="color: #9ca3af; font-size: 0.9rem;">Waehle einen Pfeil aus</p>';
            return;
        }

        if (window.SvgGenerator) {
            var svg = window.SvgGenerator.generateArrowOnly(s);
            if (svg) {
                e.standaloneArrowPreview.innerHTML = svg;
            }
        }
    },

    resetToDefaults: function() {
        window.TextGenState.reset();
        this.syncFromState();
        this.updateVisibility();
        this.updatePreview();
        this.updateStandaloneArrowPreview();
    }
};

window.UiBindings = UiBindings;