(function () {
    'use strict';

    function init(root) {
        var app = root || document.getElementById('project-search-app');
        if (!app || app.dataset.psChatBound === '1') {
            return;
        }
        app.dataset.psChatBound = '1';

        var form = app.querySelector('#project-search-form');
        var input = app.querySelector('#project-search-query');
        var messagesEl = app.querySelector('#project-search-messages');
        var statusEl = app.querySelector('#project-search-status');
        var errorEl = app.querySelector('#project-search-error');
        var submitBtn = app.querySelector('#project-search-submit');
        var endBtn = app.querySelector('#project-search-end-chat');
        var askUrl = app.dataset.askUrl;
        var endUrl = app.dataset.endUrl;
        var csrf = document.querySelector('meta[name="csrf-token"]');
        var pending = false;

        function csrfToken() {
            return csrf ? csrf.getAttribute('content') : '';
        }

        function hideError() {
            if (!errorEl) return;
            errorEl.classList.add('hidden');
            errorEl.textContent = '';
        }

        function showError(message) {
            if (!errorEl) return;
            errorEl.textContent = message;
            errorEl.classList.remove('hidden');
        }

        function setPending(active) {
            pending = active;
            if (statusEl) {
                statusEl.classList.toggle('hidden', !active);
            }
            if (submitBtn) {
                submitBtn.disabled = active || app.dataset.indexAvailable !== '1' || app.dataset.chatAvailable !== '1';
            }
            if (input) {
                input.disabled = active || app.dataset.indexAvailable !== '1' || app.dataset.chatAvailable !== '1';
            }
        }

        function removeEmptyState() {
            var empty = messagesEl ? messagesEl.querySelector('[data-chat-empty]') : null;
            if (empty) {
                empty.remove();
            }
        }

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

        function renderMessage(message) {
            var isUser = message.role === 'user';
            var html = '<div class="ps-chat__msg ' + (isUser ? 'ps-chat__msg--user' : 'ps-chat__msg--assistant') + '" data-message-id="' + (message.id || '') + '">';
            html += '<div class="ps-chat__msg-label">' + (isUser ? 'Anda' : 'Ollama') + '</div>';
            html += '<div class="ps-chat__bubble">';
            html += '<div class="ps-chat__text whitespace-pre-wrap">' + escapeHtml(message.content || '') + '</div>';

            if (!isUser && message.results && message.results.length) {
                html += '<details class="ps-chat__results mt-3" open>';
                html += '<summary class="text-xs text-cyan-400 cursor-pointer">' + message.results.length + ' folder ditemukan</summary>';
                html += '<ul class="mt-2 space-y-1 max-h-40 overflow-y-auto">';
                message.results.forEach(function (row) {
                    html += '<li class="text-xs font-mono text-slate-400 break-all">' + escapeHtml(row.path || '') + '</li>';
                });
                html += '</ul></details>';
            }

            html += '</div></div>';
            return html;
        }

        function appendMessage(message) {
            if (!messagesEl) return;
            removeEmptyState();
            messagesEl.insertAdjacentHTML('beforeend', renderMessage(message));
            messagesEl.scrollTop = messagesEl.scrollHeight;
        }

        function ensureEndChatButton() {
            if (endBtn || !app) return;
            var header = app.querySelector('.mt-6.mb-6');
            if (!header) return;
            var btn = document.createElement('button');
            btn.type = 'button';
            btn.id = 'project-search-end-chat';
            btn.className = 'rounded-lg border border-slate-600 hover:border-rose-500 hover:text-rose-300 px-4 py-2 text-sm text-slate-300';
            btn.textContent = 'End Chat';
            header.appendChild(btn);
            btn.addEventListener('click', endChat);
        }

        function getSources() {
            if (!form) return ['project'];
            var checked = form.querySelectorAll('input[name="sources[]"]:checked');
            return Array.prototype.map.call(checked, function (el) { return el.value; });
        }

        function parseResponse(res) {
            var contentType = res.headers.get('content-type') || '';

            return res.text().then(function (text) {
                if (contentType.indexOf('application/json') !== -1) {
                    try {
                        return { ok: res.ok, data: JSON.parse(text) };
                    } catch (e) {
                        throw new Error('Respons server tidak valid.');
                    }
                }

                if (res.status === 504 || res.status === 502) {
                    throw new Error('Waktu permintaan habis. Ollama membutuhkan waktu lebih lama — coba lagi dalam beberapa detik.');
                }

                if (res.status === 419) {
                    throw new Error('Sesi habis. Muat ulang halaman dan login kembali.');
                }

                if (res.status === 401 || res.status === 302) {
                    throw new Error('Sesi login tidak valid. Muat ulang halaman.');
                }

                throw new Error('Server error (HTTP ' + res.status + ').');
            });
        }

        function sendMessage(query) {
            if (pending || !askUrl) return;

            hideError();
            setPending(true);
            appendMessage({ role: 'user', content: query });

            fetch(askUrl, {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json',
                    'Accept': 'application/json',
                    'X-CSRF-TOKEN': csrfToken(),
                    'X-Requested-With': 'XMLHttpRequest',
                },
                body: JSON.stringify({
                    query: query,
                    sources: getSources(),
                    limit: 10,
                }),
            })
                .then(function (res) {
                    return parseResponse(res);
                })
                .then(function (result) {
                    if (!result.ok) {
                        throw new Error(result.data.message || 'Permintaan gagal.');
                    }
                    return result.data;
                })
                .then(function (data) {
                    if (data.assistant_message) {
                        appendMessage(data.assistant_message);
                    }
                    ensureEndChatButton();
                })
                .catch(function (err) {
                    showError(err.message || 'Gagal memproses pencarian.');
                })
                .finally(function () {
                    setPending(false);
                    if (input) {
                        input.focus();
                    }
                });
        }

        function endChat() {
            if (!endUrl || !window.confirm('Akhiri chat ini dan mulai sesi baru?')) {
                return;
            }

            hideError();
            setPending(true);

            fetch(endUrl, {
                method: 'POST',
                headers: {
                    'Accept': 'application/json',
                    'X-CSRF-TOKEN': csrfToken(),
                    'X-Requested-With': 'XMLHttpRequest',
                },
            })
                .then(function (res) {
                    return parseResponse(res);
                })
                .then(function (result) {
                    if (!result.ok) {
                        throw new Error(result.data.message || 'Gagal mengakhiri chat.');
                    }
                    return result.data;
                })
                .then(function () {
                    if (messagesEl) {
                        messagesEl.innerHTML = '<div class="ps-chat__empty text-center text-slate-500 text-sm py-12" data-chat-empty>'
                            + '<p class="mb-1">Chat diakhiri.</p>'
                            + '<p>Mulai percakapan baru dengan pertanyaan di bawah.</p></div>';
                    }
                    var btn = app.querySelector('#project-search-end-chat');
                    if (btn) {
                        btn.remove();
                    }
                })
                .catch(function (err) {
                    showError(err.message || 'Gagal mengakhiri chat.');
                })
                .finally(function () {
                    setPending(false);
                });
        }

        if (form) {
            form.addEventListener('submit', function (event) {
                event.preventDefault();
                if (!input) return;
                var query = input.value.trim();
                if (query.length < 3) return;
                input.value = '';
                sendMessage(query);
            });
        }

        if (input) {
            input.addEventListener('keydown', function (event) {
                if (event.key === 'Enter' && !event.shiftKey) {
                    event.preventDefault();
                    form.dispatchEvent(new Event('submit', { cancelable: true }));
                }
            });
        }

        if (endBtn) {
            endBtn.addEventListener('click', endChat);
        }
    }

    document.addEventListener('DOMContentLoaded', function () {
        init();
    });

    document.addEventListener('turbo:frame-load', function (event) {
        if (event.target && event.target.id === 'app-content') {
            init(event.target);
        }
    });
})();