/* ===== Settings Page ===== */
window.NAISettings = {
    STORAGE_KEY: 'nai_settings',

    // Default values
    defaults: {
        // General
        theme: 'system',            // 'light' | 'dark' | 'system'
        freeOnly: false,

        // Generate defaults
        genPrompt: '',
        genQuality: 'best quality, amazing quality, very aesthetic, absurdres',
        genNegative: 'lowres, {bad}, error, fewer, extra, missing, worst quality, jpeg artifacts, bad quality, watermark, unfinished, displeasing, chromatic aberration, signature, extra digits, artistic error, username, scan, [abstract]',
        genSampler: 'k_euler',
        genCfg: 5,
        genSteps: 28,
        genWidth: 1024,
        genHeight: 1024,
        genScheduler: 'karras',
        genSmea: false,
        genSmeaDyn: false,
        genVariety: false,
        genLegacy: false,
        genDecrisp: false,
        genCfgRescale: 0,

        // History
        clearHistoryOnRefresh: true,

        // Cloud
        saveToCloud: true,

        // Tag autocomplete
        tacEnabled: true,
        tacShowZh: true,
        tacMatchZh: true,
        tacMaxResults: 20,
        tacAutoCorrect: true,
        tacAddComma: true,
        tacChineseComma: false,
        tacUnderscoreToSpace: true,
    },

    current: {},

    load() {
        try {
            const stored = localStorage.getItem(this.STORAGE_KEY);
            const parsed = stored ? JSON.parse(stored) : {};
            this.current = { ...this.defaults, ...parsed };
        } catch (e) {
            this.current = { ...this.defaults };
        }
    },

    save() {
        try {
            localStorage.setItem(this.STORAGE_KEY, JSON.stringify(this.current));
        } catch (e) {
            console.error('Failed to save settings:', e);
        }
    },

    get(key) {
        return this.current[key] ?? this.defaults[key];
    },

    set(key, value) {
        this.current[key] = value;
        this.save();
    },

    // ── Apply settings to UI ──
    applyAll() {
        this.applyTheme();
        this.applyGenerateDefaults();
        this.applyCloudCheckbox();
        this.applyHistoryClear();
    },

    applyTheme() {
        const theme = this.get('theme');
        let effective;
        if (theme === 'system') {
            effective = window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light';
        } else {
            effective = theme;
        }
        document.documentElement.setAttribute('data-theme', effective);
        NAIState.theme = effective;
    },

    applyGenerateDefaults() {
        const s = this.current;

        const setVal = (id, val) => {
            const el = document.getElementById(id);
            if (!el) return;
            el.value = val;
            el.dispatchEvent(new Event('input', { bubbles: true }));
        };

        const setCheck = (id, val) => {
            const el = document.getElementById(id);
            if (el) el.checked = !!val;
        };

        // Only apply defaults if prompt is empty (first load)
        const promptEl = $('#prompt-input');
        if (promptEl && promptEl.value === '' && s.genPrompt) {
            promptEl.value = s.genPrompt;
            NAIUtils.autoResize(promptEl);
        }

        const qualEl = $('#quality-input');
        if (qualEl && s.genQuality !== undefined) {
            // Always apply quality default on load
            if (qualEl.value === this.defaults.genQuality || qualEl.value === '') {
                qualEl.value = s.genQuality;
                NAIUtils.autoResize(qualEl);
            }
        }

        const negEl = $('#negative-input');
        if (negEl && s.genNegative !== undefined) {
            if (negEl.value === this.defaults.genNegative || negEl.value === '') {
                negEl.value = s.genNegative;
                NAIUtils.autoResize(negEl);
            }
        }

        // Sampler
        const samplerEl = $('#sampler-select');
        if (samplerEl && s.genSampler) {
            const opts = [...samplerEl.options].map(o => o.value);
            if (opts.includes(s.genSampler)) samplerEl.value = s.genSampler;
        }

        setVal('cfg-slider', s.genCfg);
        setVal('steps-slider', s.genSteps);
        setVal('width-slider', s.genWidth);
        setVal('height-slider', s.genHeight);

        // Advanced
        const schedEl = $('#adv-scheduler');
        if (schedEl && s.genScheduler) {
            const opts = [...schedEl.options].map(o => o.value);
            if (opts.includes(s.genScheduler)) schedEl.value = s.genScheduler;
        }
        setCheck('adv-smea', s.genSmea);
        setCheck('adv-smea-dyn', s.genSmeaDyn);
        setCheck('adv-variety', s.genVariety);
        setCheck('adv-legacy', s.genLegacy);
        setCheck('adv-decrisp', s.genDecrisp);
        setVal('adv-cfg-rescale', s.genCfgRescale);
    },

    applyCloudCheckbox() {
        const el = $('#save-to-cloud');
        if (el) el.checked = this.get('saveToCloud');
    },

    applyHistoryClear() {
        if (this.get('clearHistoryOnRefresh')) {
            NAIIDB.clearAllHistory().catch(() => {});
        }
    },

    // ── Capture current generate params as defaults ──
    captureCurrentAsDefaults() {
        const s = this.current;
        s.genPrompt = $('#prompt-input')?.value || '';
        s.genQuality = $('#quality-input')?.value || '';
        s.genNegative = $('#negative-input')?.value || '';
        s.genSampler = $('#sampler-select')?.value || 'k_euler';
        s.genCfg = parseFloat($('#cfg-slider')?.value) || 5;
        s.genSteps = parseInt($('#steps-slider')?.value) || 28;
        s.genWidth = parseInt($('#width-slider')?.value) || 1024;
        s.genHeight = parseInt($('#height-slider')?.value) || 1024;
        s.genScheduler = $('#adv-scheduler')?.value || 'karras';
        s.genSmea = $('#adv-smea')?.checked || false;
        s.genSmeaDyn = $('#adv-smea-dyn')?.checked || false;
        s.genVariety = $('#adv-variety')?.checked || false;
        s.genLegacy = $('#adv-legacy')?.checked || false;
        s.genDecrisp = $('#adv-decrisp')?.checked || false;
        s.genCfgRescale = parseFloat($('#adv-cfg-rescale')?.value) || 0;
        this.save();
    },

    // ── Render settings page ──
    renderPage() {
        const s = this.current;

        // Theme
        $('#setting-theme').value = s.theme;
        $('#setting-free-only').checked = s.freeOnly;

        // Generate
        $('#setting-gen-prompt').value = s.genPrompt;
        $('#setting-gen-quality').value = s.genQuality;
        $('#setting-gen-negative').value = s.genNegative;
        $('#setting-gen-sampler').value = s.genSampler;
        $('#setting-gen-cfg').value = s.genCfg;
        $('#setting-gen-cfg-val').textContent = parseFloat(s.genCfg).toFixed(1);
        $('#setting-gen-steps').value = s.genSteps;
        $('#setting-gen-steps-val').textContent = s.genSteps;
        $('#setting-gen-width').value = s.genWidth;
        $('#setting-gen-width-val').textContent = s.genWidth;
        $('#setting-gen-height').value = s.genHeight;
        $('#setting-gen-height-val').textContent = s.genHeight;
        $('#setting-gen-scheduler').value = s.genScheduler;
        $('#setting-gen-smea').checked = s.genSmea;
        $('#setting-gen-smea-dyn').checked = s.genSmeaDyn;
        $('#setting-gen-variety').checked = s.genVariety;
        $('#setting-gen-legacy').checked = s.genLegacy;
        $('#setting-gen-decrisp').checked = s.genDecrisp;
        $('#setting-gen-cfg-rescale').value = s.genCfgRescale;
        $('#setting-gen-cfg-rescale-val').textContent = parseFloat(s.genCfgRescale).toFixed(2);

        // History
        $('#setting-clear-history').checked = s.clearHistoryOnRefresh;

        // Cloud
        $('#setting-save-cloud').checked = s.saveToCloud;

        // TAC
        $('#setting-tac-enabled').checked = s.tacEnabled;
        $('#setting-tac-show-zh').checked = s.tacShowZh;
        $('#setting-tac-match-zh').checked = s.tacMatchZh;
        $('#setting-tac-max').value = s.tacMaxResults;
        $('#setting-tac-autocorrect').checked = s.tacAutoCorrect;
        $('#setting-tac-add-comma').checked = s.tacAddComma;
        $('#setting-tac-zh-comma').checked = s.tacChineseComma;
        $('#setting-tac-underscore').checked = s.tacUnderscoreToSpace;

        // Auto-resize textareas
        $$('#page-settings .form-textarea').forEach(t => NAIUtils.autoResize(t));
    },

    // ── Bind all settings inputs ──
    _bindInputs() {
        const bind = (id, key, type = 'value') => {
            const el = $(`#${id}`);
            if (!el) return;
            const event = el.type === 'checkbox' ? 'change' : 'input';
            el.addEventListener(event, () => {
                let val;
                if (type === 'check') val = el.checked;
                else if (type === 'float') val = parseFloat(el.value);
                else if (type === 'int') val = parseInt(el.value);
                else val = el.value;
                this.set(key, val);
                this._onSettingChanged(key, val);
            });
        };

        // General
        bind('setting-theme', 'theme');
        bind('setting-free-only', 'freeOnly', 'check');

        // Generate
        bind('setting-gen-prompt', 'genPrompt');
        bind('setting-gen-quality', 'genQuality');
        bind('setting-gen-negative', 'genNegative');
        bind('setting-gen-sampler', 'genSampler');
        bind('setting-gen-cfg', 'genCfg', 'float');
        bind('setting-gen-steps', 'genSteps', 'int');
        bind('setting-gen-width', 'genWidth', 'int');
        bind('setting-gen-height', 'genHeight', 'int');
        bind('setting-gen-scheduler', 'genScheduler');
        bind('setting-gen-smea', 'genSmea', 'check');
        bind('setting-gen-smea-dyn', 'genSmeaDyn', 'check');
        bind('setting-gen-variety', 'genVariety', 'check');
        bind('setting-gen-legacy', 'genLegacy', 'check');
        bind('setting-gen-decrisp', 'genDecrisp', 'check');
        bind('setting-gen-cfg-rescale', 'genCfgRescale', 'float');

        // History
        bind('setting-clear-history', 'clearHistoryOnRefresh', 'check');

        // Cloud
        bind('setting-save-cloud', 'saveToCloud', 'check');

        // TAC
        bind('setting-tac-enabled', 'tacEnabled', 'check');
        bind('setting-tac-show-zh', 'tacShowZh', 'check');
        bind('setting-tac-match-zh', 'tacMatchZh', 'check');
        bind('setting-tac-max', 'tacMaxResults', 'int');
        bind('setting-tac-autocorrect', 'tacAutoCorrect', 'check');
        bind('setting-tac-add-comma', 'tacAddComma', 'check');
        bind('setting-tac-zh-comma', 'tacChineseComma', 'check');
        bind('setting-tac-underscore', 'tacUnderscoreToSpace', 'check');

        // Slider value displays
        NAIUtils.bindSlider('setting-gen-cfg', 'setting-gen-cfg-val', v => v.toFixed(1));
        NAIUtils.bindSlider('setting-gen-steps', 'setting-gen-steps-val');
        NAIUtils.bindSlider('setting-gen-width', 'setting-gen-width-val');
        NAIUtils.bindSlider('setting-gen-height', 'setting-gen-height-val');
        NAIUtils.bindSlider('setting-gen-cfg-rescale', 'setting-gen-cfg-rescale-val', v => v.toFixed(2));

        // Capture button
        $('#btn-setting-capture').addEventListener('click', () => {
            this.captureCurrentAsDefaults();
            this.renderPage();
            alert('已将当前参数设为默认值');
        });

        $('#btn-setting-reset').addEventListener('click', () => {
            if (!confirm('确定要重置所有设置吗？')) return;
            localStorage.removeItem(this.STORAGE_KEY);
            this.load();
            this.applyAll();
            this.renderPage();
        });

        $('#btn-tac-cache-refresh').addEventListener('click', () => {
            caches.delete('nai-tac-v2');
            NAITagComplete.loaded = false;
            NAITagComplete.loadTags();
            alert('标签自动补全缓存已刷新');
        });
    },

    _onSettingChanged(key, value) {
        if (key === 'theme') this.applyTheme();
        if (key === 'saveToCloud') this.applyCloudCheckbox();
        if (key === 'freeOnly') this._updateFreeOnlyState();
    },

    _updateFreeOnlyState() {
        // This is checked by cost.js when updating buttons
        // Force a cost recalc
        if (window.NAICost) NAICost.updateCostDisplay();
    },

    init() {
        this.load();
        this._bindInputs();

        // Render when switching to settings page
        document.querySelector('.nav-item[data-page="settings"]')?.addEventListener('click', () => {
            this.renderPage();
        });

        // System theme listener
        window.matchMedia('(prefers-color-scheme: dark)').addEventListener('change', () => {
            if (this.get('theme') === 'system') this.applyTheme();
        });

        // Apply settings after a short delay (let other modules init first)
        setTimeout(() => this.applyAll(), 100);
    },
};