window.taxbaikAdminSession = {
    clientLogState: {
        enabled: true,
        windowStart: 0,
        sentCount: 0,
        suppressedCount: 0,
        fingerprints: {},
        eventCounts: {},
        screen: '',
        feature: '',
        action: '',
        step: '',
        entity: '',
        entityId: '',
        dataKey: ''
    },

    initErrorLogging: function () {
        if (window._taxbaikClientLogInitialized) return;
        window._taxbaikClientLogInitialized = true;

        const postLog = function (payload) {
            try {
                if (!window.taxbaikAdminSession.shouldSendClientLog(payload)) {
                    return;
                }

                const body = JSON.stringify(payload);
                if (navigator.sendBeacon) {
                    const blob = new Blob([body], { type: 'application/json' });
                    if (navigator.sendBeacon('/taxbaik/api/client-logs', blob)) {
                        return;
                    }
                }

                fetch('/taxbaik/api/client-logs', {
                    method: 'POST',
                    headers: { 'Content-Type': 'application/json' },
                    body,
                    keepalive: true
                }).catch(function () { });
            } catch {
                // Logging must never break the UI.
            }
        };

        window.taxbaikAdminSession.postClientLog = postLog;

        window.addEventListener('error', function (event) {
            postLog({
                level: 'error',
                source: 'window.error',
                message: event.message || 'unknown error',
                url: event.filename || window.location.href,
                route: window.location.pathname + window.location.search,
                screen: window.taxbaikAdminSession.clientLogState.screen || '',
                feature: window.taxbaikAdminSession.clientLogState.feature || '',
                action: window.taxbaikAdminSession.clientLogState.action || '',
                step: window.taxbaikAdminSession.clientLogState.step || '',
                entity: window.taxbaikAdminSession.clientLogState.entity || '',
                entityId: window.taxbaikAdminSession.clientLogState.entityId || '',
                dataKey: window.taxbaikAdminSession.clientLogState.dataKey || '',
                buildVersion: window.taxbaikAdminBuildVersion || '',
                component: window.taxbaikAdminComponent || '',
                viewportWidth: window.taxbaikAdminSession.getViewportWidth(),
                userAgent: navigator.userAgent || '',
                stack: event.error?.stack || ''
            });
        });

        window.addEventListener('unhandledrejection', function (event) {
            const reason = event.reason;
            postLog({
                level: 'error',
                source: 'window.unhandledrejection',
                message: reason?.message || String(reason || 'unknown rejection'),
                url: window.location.href,
                route: window.location.pathname + window.location.search,
                screen: window.taxbaikAdminSession.clientLogState.screen || '',
                feature: window.taxbaikAdminSession.clientLogState.feature || '',
                action: window.taxbaikAdminSession.clientLogState.action || '',
                step: window.taxbaikAdminSession.clientLogState.step || '',
                entity: window.taxbaikAdminSession.clientLogState.entity || '',
                entityId: window.taxbaikAdminSession.clientLogState.entityId || '',
                dataKey: window.taxbaikAdminSession.clientLogState.dataKey || '',
                buildVersion: window.taxbaikAdminBuildVersion || '',
                component: window.taxbaikAdminComponent || '',
                viewportWidth: window.taxbaikAdminSession.getViewportWidth(),
                userAgent: navigator.userAgent || '',
                stack: reason?.stack || ''
            });
        });
    },

    setContext: function (screen, feature, action, step, entity, entityId, dataKey) {
        const state = window.taxbaikAdminSession.clientLogState;
        state.screen = screen || '';
        state.feature = feature || '';
        state.action = action || '';
        state.step = step || '';
        state.entity = entity || '';
        state.entityId = entityId || '';
        state.dataKey = dataKey || '';
    },

    shouldSendClientLog: function (payload) {
        try {
            const state = window.taxbaikAdminSession.clientLogState;
            if (!state.enabled) return false;

            const now = Date.now();
            if (!state.windowStart || now - state.windowStart >= 60000) {
                state.windowStart = now;
                state.sentCount = 0;
                state.suppressedCount = 0;
                state.fingerprints = {};
            }

            const fingerprint = [
                payload?.source || '',
                payload?.message || '',
                payload?.route || '',
                payload?.component || '',
                payload?.screen || '',
                payload?.feature || '',
                payload?.action || '',
                payload?.entity || '',
                payload?.entityId || ''
            ].join('|').slice(0, 256);

            state.fingerprints[fingerprint] = (state.fingerprints[fingerprint] || 0) + 1;

            if (state.sentCount >= 8) {
                state.suppressedCount += 1;
                return false;
            }

            if (state.fingerprints[fingerprint] > 2) {
                state.suppressedCount += 1;
                return false;
            }

            state.sentCount += 1;
            return true;
        } catch {
            return false;
        }
    },

    traceUiState: function (source, details) {
        try {
            const payload = {
                level: 'info',
                source: source || 'ui-state',
                message: details || '',
                url: window.location.href,
                route: window.location.pathname + window.location.search,
                screen: window.taxbaikAdminSession.clientLogState.screen || '',
                feature: window.taxbaikAdminSession.clientLogState.feature || '',
                action: window.taxbaikAdminSession.clientLogState.action || '',
                step: window.taxbaikAdminSession.clientLogState.step || '',
                entity: window.taxbaikAdminSession.clientLogState.entity || '',
                entityId: window.taxbaikAdminSession.clientLogState.entityId || '',
                dataKey: window.taxbaikAdminSession.clientLogState.dataKey || '',
                buildVersion: window.taxbaikAdminBuildVersion || '',
                component: window.taxbaikAdminComponent || '',
                viewportWidth: window.taxbaikAdminSession.getViewportWidth(),
                userAgent: navigator.userAgent || '',
                stack: ''
            };

            const state = window.taxbaikAdminSession.clientLogState;
            const key = `${payload.source}|${payload.route}|${payload.message}`.slice(0, 256);
            state.eventCounts[key] = (state.eventCounts[key] || 0) + 1;
            if (state.eventCounts[key] > 1) {
                return;
            }

            window.taxbaikAdminSession.postClientLog(payload);
        } catch {
            // diagnostics must never break UI.
        }
    },

    postClientLog: function () {
        // Replaced during initialization.
    },

    syncRouteClass: function () {
        document.documentElement.classList.toggle(
            'admin-login-route',
            window.location.pathname.toLowerCase().endsWith('/admin/login'));
    },

    getViewportWidth: function () {
        return window.innerWidth || document.documentElement.clientWidth || 0;
    },

    clearAuthToken: function () {
        try {
            localStorage.removeItem('accessToken');
            localStorage.removeItem('refreshToken');
            localStorage.removeItem('tokenExpiry');
            localStorage.removeItem('auth_token');
        } catch {
            // Ignore storage errors; redirect still recovers the session.
        }
    },

    showLoading: function () {
        // Route transitions are handled by Blazor; avoid full-screen overlays
        // that block drawer interaction and make the app feel frozen.
        window.taxbaikAdminSession.traceUiState('admin-loading', 'showLoading requested');
        window.taxbaikAdminSession.hideLoading();
    },

    hideLoading: function () {
        const overlay = document.getElementById('blazor-loading');
        if (overlay) {
            overlay.classList.remove('show');
        }

        if (window._taxbaikLoadingTimeout) {
            clearTimeout(window._taxbaikLoadingTimeout);
            window._taxbaikLoadingTimeout = null;
        }

        if (window._taxbaikLoadingObserver) {
            window._taxbaikLoadingObserver.disconnect();
            window._taxbaikLoadingObserver = null;
        }

        window.taxbaikAdminSession.traceUiState('admin-loading', 'hideLoading completed');
    },

    watchReconnect: function () {
        window.taxbaikAdminSession.syncRouteClass();
        window.addEventListener('popstate', window.taxbaikAdminSession.syncRouteClass);
        window.addEventListener('hashchange', window.taxbaikAdminSession.syncRouteClass);

        if (document.documentElement.classList.contains('admin-login-route')) {
            window.taxbaikAdminSession.hideLoading();
        }

        // Keep the initial overlay hidden unless explicitly enabled elsewhere.
        window.taxbaikAdminSession.hideLoading();

        const modal = document.getElementById('components-reconnect-modal');
        if (!modal) return;

        const reloadOnRejectedCircuit = function () {
            const className = modal.className || '';
            if (className.includes('components-reconnect-failed') ||
                className.includes('components-reconnect-rejected')) {
                window.setTimeout(function () { window.location.reload(); }, 1500);
            }
        };

        new MutationObserver(reloadOnRejectedCircuit)
            .observe(modal, { attributes: true, attributeFilter: ['class'] });
    },

    bindLoginForm: function () {
        const form = document.getElementById('admin-login-form');
        if (!form || form.dataset.bound === '1') return;

        form.dataset.bound = '1';
        window.taxbaikAdminSession.traceUiState('admin-login', 'bindLoginForm attached');
        form.addEventListener('submit', async function (event) {
            event.preventDefault();

            const username = form.querySelector('input[placeholder="사용자명"]')?.value?.trim() || '';
            const password = form.querySelector('input[placeholder="비밀번호"]')?.value || '';
            const rememberMe = form.querySelector('input[type="checkbox"]')?.checked || false;
            const existing = form.parentElement.querySelector('.login-error-message');
            const submitButton = form.querySelector('button[type="submit"]');

            if (existing) existing.remove();
            if (submitButton) submitButton.disabled = true;

            try {
                if (!username || !password) {
                    throw new Error('username/password missing');
                }

                window.taxbaikAdminSession.traceUiState('admin-login', 'submit started');
                const response = await fetch('/taxbaik/api/auth/login', {
                    method: 'POST',
                    headers: { 'Content-Type': 'application/json' },
                    body: JSON.stringify({ username, password })
                });

                if (!response.ok) {
                    throw new Error('login failed');
                }

                const data = await response.json();
                if (!data?.accessToken || !data?.refreshToken) {
                    throw new Error('invalid response');
                }

                window.taxbaikAdminSession.traceUiState('admin-login', 'submit success');
                const expiryTicks = 621355968000000000 + ((Date.now() + (data.expiresIn || 3600) * 1000) * 10000);
                localStorage.setItem('accessToken', data.accessToken);
                localStorage.setItem('refreshToken', data.refreshToken);
                localStorage.setItem('tokenExpiry', String(expiryTicks));

                if (rememberMe) {
                    localStorage.setItem('admin-remembered-username', username);
                } else {
                    localStorage.removeItem('admin-remembered-username');
                }

                window.location.href = '/taxbaik/admin/dashboard';
            } catch (error) {
                window.taxbaikAdminSession.traceUiState('admin-login', `submit failed: ${error?.message || 'login failed'}`);
                postLog({
                    level: 'error',
                    source: 'admin-login-form',
                    message: error?.message || 'login failed',
                    url: window.location.href,
                    route: window.location.pathname + window.location.search,
                    buildVersion: window.taxbaikAdminBuildVersion || '',
                    component: 'AdminLoginForm',
                    viewportWidth: window.taxbaikAdminSession.getViewportWidth(),
                    userAgent: navigator.userAgent || '',
                    stack: error?.stack || ''
                });
                const errorMessage = document.createElement('div');
                errorMessage.className = 'mud-alert mud-alert-filled-error login-error-message mb-4';
                errorMessage.textContent = '로그인 중 오류가 발생했습니다.';
                form.parentElement.insertBefore(errorMessage, form);
            } finally {
                if (submitButton) submitButton.disabled = false;
            }
        });
    }
};

// 더존 ERP 스타일 엔터 키 포커스 이동 및 단축키 바인딩
document.addEventListener('keydown', function (e) {
    if (e.key === 'Enter') {
        const active = document.activeElement;
        if (!active) return;
        
        // 특정 영역(편집 폼 또는 다이얼로그) 내의 입력 필드만 포커스 이동 처리
        const container = active.closest('.admin-editor-panel, .mud-form, .mud-dialog');
        if (!container) return;

        // textarea나 button, submit 타입 등은 기본 동작(줄바꿈/제출) 유지
        if (active.tagName === 'TEXTAREA' || 
            active.tagName === 'BUTTON' || 
            active.getAttribute('type') === 'submit' ||
            active.classList.contains('mud-button-root')) {
            return;
        }

        e.preventDefault();

        // 포커스 이동 가능한 모든 입력 요소 수집
        const focusables = Array.from(container.querySelectorAll('input, select, textarea, button'))
            .filter(el => {
                const style = window.getComputedStyle(el);
                return el.tabIndex >= 0 && 
                       !el.disabled && 
                       el.getAttribute('aria-disabled') !== 'true' &&
                       style.display !== 'none' && 
                       style.visibility !== 'hidden';
            });

        const index = focusables.indexOf(active);
        if (index > -1 && index < focusables.length - 1) {
            const nextEl = focusables[index + 1];
            nextEl.focus();
            if (typeof nextEl.select === 'function') {
                nextEl.select();
            }
        }
    }
});
