252 lines
9.3 KiB
Python
252 lines
9.3 KiB
Python
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from __future__ import annotations
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import json
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import sys
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from pathlib import Path
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sys.path.insert(0, str(Path(__file__).parent.parent))
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import chromadb
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from PySide6.QtCore import Qt, QEvent, QUrl
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from PySide6.QtWidgets import (
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QMainWindow, QWidget, QVBoxLayout, QHBoxLayout,
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QLabel, QComboBox, QTextEdit, QPushButton,
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)
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from PySide6.QtWebEngineWidgets import QWebEngineView
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from gui.worker import RagWorker
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_HERE = Path(__file__).parent
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_PROJECT = _HERE.parent
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_CHROMA_DIR = _PROJECT / "chroma_db"
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_CHAT_HTML = _HERE / "chat.html"
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# ── Temi ──────────────────────────────────────────────────────────────────────
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_THEMES = {
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"dark": {
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"topbar": "background:#171717; border-bottom:1px solid #2e2e2e;",
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"lbl": "color:#aaa; font-size:13px;",
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"combo": """
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QComboBox {
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background:#2a2a2a; color:#ececec;
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border:1px solid #3a3a3a; border-radius:6px;
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padding:4px 10px; font-size:13px;
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}
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QComboBox::drop-down { border:none; }
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QComboBox QAbstractItemView {
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background:#2a2a2a; color:#ececec;
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selection-background-color:#3a3a3a;
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}
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""",
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"inputbar": "background:#171717; border-top:1px solid #2e2e2e;",
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"input": """
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QTextEdit {
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background:#2a2a2a; color:#ececec;
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border:1px solid #3a3a3a; border-radius:10px;
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padding:8px 12px; font-size:14px;
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}
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""",
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"theme_btn": "background:#2a2a2a; color:#ececec; border:1px solid #3a3a3a; border-radius:6px; font-size:16px; padding:4px 8px;",
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"icon": "☀️",
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},
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"light": {
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"topbar": "background:#f5f5f5; border-bottom:1px solid #e0e0e0;",
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"lbl": "color:#555; font-size:13px;",
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"combo": """
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QComboBox {
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background:#ffffff; color:#1a1a1a;
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border:1px solid #ddd; border-radius:6px;
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padding:4px 10px; font-size:13px;
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}
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QComboBox::drop-down { border:none; }
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QComboBox QAbstractItemView {
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background:#ffffff; color:#1a1a1a;
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selection-background-color:#e8e8e8;
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}
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""",
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"inputbar": "background:#f5f5f5; border-top:1px solid #e0e0e0;",
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"input": """
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QTextEdit {
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background:#ffffff; color:#1a1a1a;
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border:1px solid #ddd; border-radius:10px;
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padding:8px 12px; font-size:14px;
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}
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""",
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"theme_btn": "background:#fff; color:#1a1a1a; border:1px solid #ddd; border-radius:6px; font-size:16px; padding:4px 8px;",
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"icon": "🌙",
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},
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}
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_BTN_SEND = """
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QPushButton {
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background:#10a37f; color:#fff;
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border:none; border-radius:8px; font-size:14px; font-weight:600;
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}
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QPushButton:hover { background:#1ab58e; }
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QPushButton:pressed { background:#0d8a6a; }
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QPushButton:disabled { background:#2a2a2a; color:#555; }
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"""
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class ChatWindow(QMainWindow):
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def __init__(self, default_collection: str = "") -> None:
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super().__init__()
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self.setWindowTitle("RAG Assistant")
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self.resize(1000, 720)
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self._dark = True
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self._worker: RagWorker | None = None
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self._collection: chromadb.Collection | None = None
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self._chroma = chromadb.PersistentClient(path=str(_CHROMA_DIR))
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self._build_ui()
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self._load_collections(default_collection)
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self._load_page()
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# ── UI ────────────────────────────────────────────────────────────────────
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def _build_ui(self) -> None:
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root = QWidget()
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self.setCentralWidget(root)
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layout = QVBoxLayout(root)
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layout.setSpacing(0)
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layout.setContentsMargins(0, 0, 0, 0)
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# Top bar
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self._top = QWidget()
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self._top.setFixedHeight(46)
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tl = QHBoxLayout(self._top)
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tl.setContentsMargins(14, 0, 14, 0)
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tl.setSpacing(8)
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self._lbl = QLabel("Collezione:")
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tl.addWidget(self._lbl)
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self._combo = QComboBox()
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self._combo.setFixedWidth(260)
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self._combo.currentTextChanged.connect(self._on_collection_changed)
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tl.addWidget(self._combo)
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tl.addStretch()
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self._theme_btn = QPushButton()
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self._theme_btn.setFixedSize(36, 30)
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self._theme_btn.setToolTip("Cambia tema")
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self._theme_btn.clicked.connect(self._toggle_theme)
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tl.addWidget(self._theme_btn)
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layout.addWidget(self._top)
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# Web view
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self._web = QWebEngineView()
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s = self._web.settings()
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s.setAttribute(s.WebAttribute.JavascriptEnabled, True)
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s.setAttribute(s.WebAttribute.LocalContentCanAccessRemoteUrls, True)
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layout.addWidget(self._web, stretch=1)
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# Input bar
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self._bar = QWidget()
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bl = QHBoxLayout(self._bar)
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bl.setContentsMargins(14, 10, 14, 12)
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bl.setSpacing(10)
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self._input = QTextEdit()
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self._input.setPlaceholderText("Fai una domanda… (Invio per inviare, Shift+Invio per andare a capo)")
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self._input.setFixedHeight(68)
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self._input.installEventFilter(self)
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bl.addWidget(self._input, stretch=1)
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self._btn = QPushButton("Invia")
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self._btn.setFixedSize(76, 42)
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self._btn.setStyleSheet(_BTN_SEND)
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self._btn.clicked.connect(self._on_send)
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bl.addWidget(self._btn)
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layout.addWidget(self._bar)
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self._apply_theme()
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def _apply_theme(self) -> None:
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t = _THEMES["dark" if self._dark else "light"]
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self._top.setStyleSheet(t["topbar"])
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self._lbl.setStyleSheet(t["lbl"])
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self._combo.setStyleSheet(t["combo"])
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self._bar.setStyleSheet(t["inputbar"])
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self._input.setStyleSheet(t["input"])
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self._theme_btn.setStyleSheet(t["theme_btn"])
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self._theme_btn.setText(t["icon"])
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# ── Init ──────────────────────────────────────────────────────────────────
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def _load_collections(self, default: str) -> None:
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names = sorted(c.name for c in self._chroma.list_collections())
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self._combo.addItems(names)
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if default and default in names:
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self._combo.setCurrentText(default)
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def _load_page(self) -> None:
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self._web.setUrl(QUrl.fromLocalFile(str(_CHAT_HTML)))
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# ── Events ────────────────────────────────────────────────────────────────
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def eventFilter(self, obj, event) -> bool:
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if obj is self._input and event.type() == QEvent.Type.KeyPress:
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if event.key() in (Qt.Key.Key_Return, Qt.Key.Key_Enter):
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if not (event.modifiers() & Qt.KeyboardModifier.ShiftModifier):
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self._on_send()
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return True
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return super().eventFilter(obj, event)
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def _on_collection_changed(self, name: str) -> None:
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if name:
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self._collection = self._chroma.get_collection(name)
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def _toggle_theme(self) -> None:
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self._dark = not self._dark
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self._apply_theme()
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theme = "dark" if self._dark else "light"
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self._js(f"setTheme({json.dumps(theme)})")
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def _on_send(self) -> None:
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question = self._input.toPlainText().strip()
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if not question:
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return
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if not self._collection:
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self._js("addMessage('assistant', '⚠️ Seleziona una collezione prima di inviare.', [])")
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return
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self._input.clear()
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self._set_enabled(False)
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self._js(f"addMessage('user', {json.dumps(question)}, [])")
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self._js("addThinking()")
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self._worker = RagWorker(question, self._collection, parent=self)
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self._worker.finished.connect(self._on_response)
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self._worker.error.connect(self._on_error)
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self._worker.start()
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def _on_response(self, response: str, chunks: list) -> None:
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self._js("removeThinking()")
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sources = [
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{"source": c.get("source", ""), "header_path": c.get("header_path", "")}
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for c in chunks
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]
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self._js(f"addMessage('assistant', {json.dumps(response)}, {json.dumps(sources)})")
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self._set_enabled(True)
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def _on_error(self, msg: str) -> None:
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self._js("removeThinking()")
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self._js(f"addMessage('assistant', {json.dumps('❌ Errore: ' + msg)}, [])")
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self._set_enabled(True)
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# ── Helpers ───────────────────────────────────────────────────────────────
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def _js(self, script: str) -> None:
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self._web.page().runJavaScript(script)
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def _set_enabled(self, enabled: bool) -> None:
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self._input.setEnabled(enabled)
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self._btn.setEnabled(enabled)
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if enabled:
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self._input.setFocus()
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