cmshoppe/app/gui/tabs/generate.py

"""Tab 2: AI generation UI."""

from __future__ import annotations

from ..models import GenerateTaskTableModel
from ..widgets import *
from ..workers import GenerateWorker as _RealGenerateWorker


def GenerateWorker(*args, **kwargs):
    return _call_package_attr("GenerateWorker", _RealGenerateWorker, *args, **kwargs)

class GenerateTab(QWidget):
    """Tab 2: prompt area plus generation task filters/list."""

    STATUS_FILTERS = [
        ("全部状态", "all"),
        ("待生成", "to_generate"),
        ("已生成", "generated"),
        ("失败", "failed"),
        ("略过", "skipped"),
        ("已更新", "applied"),
    ]

    def __init__(
        self,
        parent=None,
        db_path=None,
        config=None,
        config_path=None,
        status_callback=None,
        title_prompt_path=None,
        cover_prompts_dir=None,
        open_accounts_callback=None,
    ):
        super().__init__(parent)
        self.config = appconfig.load_config(config_path or appconfig.CONFIG_PATH) if config is None else config
        self.config_path = (
            config_path
            or self.config.get("config_path")
            or appconfig.CONFIG_PATH
        )
        self.db_path = _database_path(db_path, self.config)
        self.status_callback = status_callback
        self.open_accounts_callback = open_accounts_callback
        self.title_prompt_path = title_prompt_path or prompts.TITLE_PROMPT_PATH
        self.cover_prompts_dir = cover_prompts_dir or prompts.COVER_PROMPTS_DIR
        self.current_cover_template = None
        self.generate_worker = None
        self.generate_thread = None

        self.title_prompt_edit = QPlainTextEdit()
        self.title_prompt_edit.setObjectName("titlePromptEdit")
        self.title_prompt_edit.setPlaceholderText("标题提示词")
        self.title_prompt_edit.setPlainText(
            prompts.load_title_prompt(self.title_prompt_path)
        )
        self.save_title_button = QPushButton("保存标题提示词")
        self.cover_prompt_edit = QPlainTextEdit()
        self.cover_prompt_edit.setObjectName("coverPromptEdit")
        self.cover_prompt_edit.setPlaceholderText("封面提示词")
        self.cover_template_combo = QComboBox()
        self.cover_template_combo.setObjectName("coverTemplateCombo")
        self.new_cover_template_button = QPushButton("新建")
        self.save_cover_template_button = QPushButton("保存")
        self.cover_template_actions_button = QPushButton("模板操作")
        self.cover_template_actions_button.setObjectName("coverTemplateActionsButton")
        self.cover_template_actions_menu = QMenu(self)
        self.save_cover_template_as_action = self.cover_template_actions_menu.addAction("另存为")
        self.save_cover_template_as_action.setObjectName("saveCoverTemplateAsAction")
        self.rename_cover_template_action = self.cover_template_actions_menu.addAction("重命名")
        self.rename_cover_template_action.setObjectName("renameCoverTemplateAction")
        self.delete_cover_template_action = self.cover_template_actions_menu.addAction("删除")
        self.delete_cover_template_action.setObjectName("deleteCoverTemplateAction")
        self.cover_template_actions_button.setMenu(self.cover_template_actions_menu)
        self.insert_title_button = QPushButton("插入标题")
        self.preview_prompt_button = QPushButton("预览")
        self.generate_button = QPushButton("开始生成")
        self.stop_generate_button = QPushButton("停止")
        self.reset_generate_button = QPushButton("重置生成结果")
        self.reset_generate_button.setObjectName("resetGenerateButton")
        self.stop_generate_button.setEnabled(False)
        ai_settings = appconfig.ai_config(self.config)
        self.generate_cover_checkbox = QCheckBox("生成封面图片（成本较高）")
        self.generate_cover_checkbox.setObjectName("generateCoverCheckbox")
        self.generate_cover_checkbox.setToolTip("关闭后只生成标题并保存为可更新，不调用图片模型")
        self.generate_cover_checkbox.setChecked(bool(ai_settings.get("generate_cover", False)))
        self.progress_label = QLabel("进度：标题0/0 · 图片0/0 · 失败0")
        self.title_progress_label = QLabel("标题 0/0")
        self.title_progress_label.setObjectName("generateTitleProgressLabel")
        self.title_progress_bar = QProgressBar()
        self.title_progress_bar.setObjectName("generateTitleProgressBar")
        self.title_progress_bar.setTextVisible(False)
        self.title_progress_bar.setRange(0, 1)
        self.title_progress_bar.setValue(0)
        self.cover_progress_label = QLabel("图片 0/0")
        self.cover_progress_label.setObjectName("generateCoverProgressLabel")
        self.cover_progress_bar = QProgressBar()
        self.cover_progress_bar.setObjectName("generateCoverProgressBar")
        self.cover_progress_bar.setTextVisible(False)
        self.cover_progress_bar.setRange(0, 1)
        self.cover_progress_bar.setValue(0)
        self.failed_progress_label = QLabel("失败 0")
        self.failed_progress_label.setObjectName("generateFailedProgressLabel")
        self.cmhub_balance_label = QLabel("cmhub余额：未获取")
        self.cmhub_balance_label.setObjectName("generateCmhubBalanceLabel")

        left_panel = QWidget()
        left_layout = QVBoxLayout(left_panel)
        left_layout.setContentsMargins(0, 0, 12, 0)
        left_layout.addWidget(QLabel("标题提示词"))
        left_layout.addWidget(self.title_prompt_edit, 1)
        left_layout.addWidget(self.save_title_button)
        left_layout.addWidget(QLabel("封面提示词"))
        left_layout.addWidget(self.cover_template_combo)
        cover_template_layout = QHBoxLayout()
        cover_template_layout.addWidget(self.new_cover_template_button)
        cover_template_layout.addWidget(self.save_cover_template_button)
        cover_template_layout.addWidget(self.cover_template_actions_button)
        cover_template_layout.addStretch(1)
        left_layout.addLayout(cover_template_layout)
        left_layout.addWidget(self.cover_prompt_edit, 2)
        cover_action_layout = QHBoxLayout()
        cover_action_layout.addWidget(self.insert_title_button)
        cover_action_layout.addWidget(self.preview_prompt_button)
        left_layout.addLayout(cover_action_layout)

        self.batch_filter = QComboBox()
        self.batch_filter.setObjectName("batchFilter")
        self.shop_filter = QComboBox()
        self.shop_filter.setObjectName("shopFilter")
        self.item_filter = QLineEdit()
        self.item_filter.setObjectName("generateItemFilter")
        self.item_filter.setPlaceholderText("商品ID")
        self.status_filter = QComboBox()
        self.status_filter.setObjectName("statusFilter")
        for label, value in self.STATUS_FILTERS:
            self.status_filter.addItem(label, value)
        self.refresh_button = QPushButton("刷新")

        filter_layout = QHBoxLayout()
        filter_layout.addWidget(QLabel("批次"))
        filter_layout.addWidget(self.batch_filter, 2)
        filter_layout.addWidget(QLabel("店铺"))
        filter_layout.addWidget(self.shop_filter, 1)
        filter_layout.addWidget(QLabel("商品ID"))
        filter_layout.addWidget(self.item_filter, 1)
        filter_layout.addWidget(QLabel("状态"))
        filter_layout.addWidget(self.status_filter, 1)
        filter_layout.addWidget(self.refresh_button)

        self.summary_label = QLabel("任务 0 条")
        self.batch_progress_label = _build_batch_progress_overview("generateBatchProgressOverview")
        (
            self.empty_state_card,
            self.empty_state_label,
            self.empty_state_button,
        ) = _build_empty_state_card("generateEmptyStateCard")
        if self.open_accounts_callback is not None:
            self.empty_state_button.clicked.connect(self.open_accounts_callback)
        self.task_table = QTableView()
        self.model = GenerateTaskTableModel(self.task_table, db_path=self.db_path, status_callback=self._set_status)
        self.task_table.setModel(self.model)
        self.task_table.setSelectionBehavior(QAbstractItemView.SelectRows)
        self.task_table.setSelectionMode(QAbstractItemView.SingleSelection)
        self.task_table.setEditTriggers(QAbstractItemView.DoubleClicked | QAbstractItemView.EditKeyPressed)
        self.task_table.horizontalHeader().setSectionResizeMode(QHeaderView.Stretch)
        self.task_table.verticalHeader().setVisible(False)

        self.run_log_view = QPlainTextEdit()
        self.run_log_view.setObjectName("generateRunLogView")
        self.run_log_view.setReadOnly(True)
        self.run_log_view.setMaximumHeight(128)
        self.run_log_view.setPlaceholderText("AI生成运行日志")

        right_panel = QWidget()
        right_layout = QVBoxLayout(right_panel)
        right_layout.setContentsMargins(12, 0, 0, 0)
        right_layout.addLayout(filter_layout)
        right_layout.addWidget(self.summary_label)
        right_layout.addWidget(self.batch_progress_label)
        right_layout.addWidget(self.empty_state_card)
        right_layout.addWidget(self.task_table, 1)
        right_layout.addWidget(QLabel("AI生成运行日志"))
        right_layout.addWidget(self.run_log_view)

        self.splitter = QSplitter(Qt.Horizontal)
        self.splitter.addWidget(left_panel)
        self.splitter.addWidget(right_panel)
        self.splitter.setStretchFactor(0, 1)
        self.splitter.setStretchFactor(1, 3)
        self.splitter.setSizes([280, 860])

        title_progress_layout = QHBoxLayout()
        title_progress_layout.addWidget(self.title_progress_label)
        title_progress_layout.addWidget(self.title_progress_bar, 1)
        cover_progress_layout = QHBoxLayout()
        cover_progress_layout.addWidget(self.cover_progress_label)
        cover_progress_layout.addWidget(self.cover_progress_bar, 1)
        cover_progress_layout.addWidget(self.failed_progress_label)
        cover_progress_layout.addWidget(self.cmhub_balance_label)
        progress_layout = QVBoxLayout()
        progress_layout.addLayout(title_progress_layout)
        progress_layout.addLayout(cover_progress_layout)

        button_layout = QHBoxLayout()
        button_layout.addStretch(1)
        button_layout.addWidget(self.generate_button)
        button_layout.addWidget(self.stop_generate_button)
        button_layout.addWidget(self.reset_generate_button)

        bottom_layout = QHBoxLayout()
        bottom_layout.addWidget(self.generate_cover_checkbox)
        bottom_layout.addLayout(progress_layout, 1)
        bottom_layout.addLayout(button_layout)

        layout = QVBoxLayout(self)
        layout.setContentsMargins(18, 18, 18, 18)
        layout.addWidget(self.splitter, 1)
        layout.addLayout(bottom_layout)

        self.batch_filter.currentIndexChanged.connect(self.refresh_tasks)
        self.shop_filter.currentIndexChanged.connect(self.refresh_tasks)
        self.item_filter.textChanged.connect(self.refresh_tasks)
        self.status_filter.currentIndexChanged.connect(self.refresh_tasks)
        self.refresh_button.clicked.connect(self.refresh_tasks)
        self.save_title_button.clicked.connect(self.save_title_prompt)
        self.cover_template_combo.currentIndexChanged.connect(self.load_selected_cover_template)
        self.new_cover_template_button.clicked.connect(self.new_cover_template)
        self.save_cover_template_button.clicked.connect(self.save_cover_template)
        self.save_cover_template_as_action.triggered.connect(self.save_cover_template_as)
        self.rename_cover_template_action.triggered.connect(self.rename_cover_template)
        self.delete_cover_template_action.triggered.connect(self.delete_cover_template)
        self.insert_title_button.clicked.connect(self.insert_title_placeholder)
        self.preview_prompt_button.clicked.connect(self.preview_cover_prompt)
        self.generate_cover_checkbox.toggled.connect(self._on_generate_cover_toggled)
        self.generate_button.clicked.connect(self.start_generate)
        self.stop_generate_button.clicked.connect(self.stop_generate)
        self.reset_generate_button.clicked.connect(self.reset_generated_result)
        self.task_table.doubleClicked.connect(self.show_task_images)

        self.refresh_cover_templates()
        self.refresh_tasks()
        self._show_current_run_log_empty()
        self._update_cmhub_balance_label({})

    def _set_status(self, message):
        if self.status_callback is not None:
            self.status_callback(message)

    def _on_generate_log(self, message):
        self._append_generate_log(message)
        self._set_status(message)

    def _append_generate_log(self, message):
        self.run_log_view.appendPlainText(str(message))
        scroll_bar = self.run_log_view.verticalScrollBar()
        scroll_bar.setValue(scroll_bar.maximum())

    def _show_current_run_log_empty(self):
        self.run_log_view.setPlainText("本轮日志会在开始运行后显示")

    def _reset_generate_run_log(self, tasks, generate_cover):
        self.run_log_view.clear()
        cover_text = "是" if generate_cover else "否"
        self._append_generate_log(
            f"本轮AI生成开始：任务 {len(tasks)} 条，生成封面：{cover_text}"
        )

    def _on_generate_cover_toggled(self, checked):
        previous = bool(appconfig.ai_config(self.config).get("generate_cover", False))
        if self._save_generate_cover_setting(show_status=True):
            return
        self.generate_cover_checkbox.blockSignals(True)
        self.generate_cover_checkbox.setChecked(previous)
        self.generate_cover_checkbox.blockSignals(False)

    def _save_generate_cover_setting(self, show_status=True):
        generate_cover = bool(self.generate_cover_checkbox.isChecked())
        ai_settings = appconfig.ai_config(self.config)
        ai_settings["generate_cover"] = generate_cover
        payload = {
            key: value
            for key, value in self.config.items()
            if key not in {"config_path", "ai_models_path", "cmhub_config_path"}
        }
        payload["ai"] = ai_settings
        try:
            saved = appconfig.save_config(payload, path=self.config_path)
        except Exception as exc:
            self._set_status(f"生成封面开关保存失败：{exc}")
            return False
        internal = {
            key: value
            for key, value in self.config.items()
            if key in {"config_path", "ai_models_path", "cmhub_config_path"}
        }
        self.config.clear()
        self.config.update(saved)
        self.config.update(internal)
        if self.config_path != appconfig.CONFIG_PATH:
            self.config["config_path"] = self.config_path
        if show_status:
            mode = "会同时生成封面图片" if generate_cover else "只生成标题，不生成图片"
            self._set_status(f"AI生成设置已保存：{mode}")
        return True

    def _load_latest_generate_run_log(self):
        try:
            logs = db.list_run_logs(limit=1, run_type="generate", path=self.db_path)
            if not logs:
                return
            events = db.list_run_log_events(logs[0].id, limit=40, path=self.db_path)
        except Exception:
            return
        lines = [
            f"{event.created_at} [{event.level}] {event.message}"
            for event in reversed(events)
        ]
        self.run_log_view.setPlainText("\n".join(lines))
        scroll_bar = self.run_log_view.verticalScrollBar()
        scroll_bar.setValue(scroll_bar.maximum())

    def save_title_prompt(self, checked=False):
        try:
            prompts.save_title_prompt(
                self.title_prompt_edit.toPlainText(),
                self.title_prompt_path,
            )
        except Exception as exc:
            self._show_prompt_error(exc)
            return
        self._set_status("标题提示词已保存")

    def refresh_cover_templates(self, selected=None):
        try:
            template_names = prompts.list_cover_templates(self.cover_prompts_dir)
        except Exception as exc:
            template_names = []
            self._show_prompt_error(exc)
        current = selected if selected is not None else self.current_cover_template
        self.cover_template_combo.blockSignals(True)
        self.cover_template_combo.clear()
        if template_names:
            for name in template_names:
                self.cover_template_combo.addItem(name, name)
            index = self.cover_template_combo.findData(current)
            self.cover_template_combo.setCurrentIndex(index if index >= 0 else 0)
        else:
            self.cover_template_combo.addItem("默认", None)
            self.cover_template_combo.setCurrentIndex(0)
        self.cover_template_combo.blockSignals(False)
        self.load_selected_cover_template()

    def load_selected_cover_template(self, index=None):
        name = self.cover_template_combo.currentData()
        self.current_cover_template = name
        if name is None:
            self.cover_prompt_edit.setPlainText("")
            return
        try:
            self.cover_prompt_edit.setPlainText(
                prompts.load_cover_template(name, self.cover_prompts_dir)
            )
        except Exception as exc:
            self.cover_prompt_edit.setPlainText("")
            self._show_prompt_error(exc)

    def new_cover_template(self, checked=False):
        name = self._ask_template_name("新建封面提示词模板")
        if not name:
            return
        try:
            prompts.save_cover_template(name, "", self.cover_prompts_dir)
        except Exception as exc:
            self._show_prompt_error(exc)
            return
        self.refresh_cover_templates(selected=name)
        self._set_status(f"封面提示词模板已新建：{name}")

    def save_cover_template(self, checked=False):
        name = self.current_cover_template
        if name is None:
            self.save_cover_template_as()
            return
        try:
            prompts.save_cover_template(
                name,
                self.cover_prompt_edit.toPlainText(),
                self.cover_prompts_dir,
            )
        except Exception as exc:
            self._show_prompt_error(exc)
            return
        self._set_status(f"封面提示词模板已保存：{name}")

    def save_cover_template_as(self, checked=False):
        name = self._ask_template_name("另存封面提示词模板")
        if not name:
            return
        try:
            prompts.save_cover_template(
                name,
                self.cover_prompt_edit.toPlainText(),
                self.cover_prompts_dir,
            )
        except Exception as exc:
            self._show_prompt_error(exc)
            return
        self.refresh_cover_templates(selected=name)
        self._set_status(f"封面提示词模板已另存为：{name}")

    def rename_cover_template(self, checked=False):
        old_name = self.current_cover_template
        if old_name is None:
            self._set_status("没有可重命名的封面提示词模板")
            return
        new_name = self._ask_template_name("重命名封面提示词模板", text=old_name)
        if not new_name or new_name == old_name:
            return
        try:
            prompts.rename_cover_template(old_name, new_name, self.cover_prompts_dir)
        except Exception as exc:
            self._show_prompt_error(exc)
            return
        self.refresh_cover_templates(selected=new_name)
        self._set_status(f"封面提示词模板已重命名：{new_name}")

    def delete_cover_template(self, checked=False):
        name = self.current_cover_template
        if name is None:
            self._set_status("没有可删除的封面提示词模板")
            return
        choice = QMessageBox.question(
            self,
            "删除封面提示词模板",
            f"确定删除「{name}」吗？",
        )
        if choice != QMessageBox.Yes:
            return
        try:
            prompts.delete_cover_template(name, self.cover_prompts_dir)
        except Exception as exc:
            self._show_prompt_error(exc)
            return
        self.refresh_cover_templates()
        self._set_status(f"封面提示词模板已删除：{name}")

    def insert_title_placeholder(self, checked=False):
        self.cover_prompt_edit.insertPlainText("{新标题}")

    def preview_cover_prompt(self, checked=False):
        task = self._selected_task()
        if task is None:
            self._set_status("没有可预览的任务")
            return
        rendered = prompts.render_prompt(
            self.cover_prompt_edit.toPlainText(),
            self._prompt_context(task),
        )
        QMessageBox.information(self, "封面提示词预览", rendered)
        self._set_status("封面提示词预览已生成")

    def start_generate(self, checked=False):
        if self.generate_thread is not None:
            self._set_status("AI 生成正在进行...")
            return
        if not self._save_generate_cover_setting(show_status=False):
            return
        generate_cover = bool(self.generate_cover_checkbox.isChecked())
        tasks = [
            task for task in self.model.tasks
            if getattr(task, "stage", None) == "collected"
        ]
        if not tasks:
            self._set_status("当前筛选结果没有可生成任务")
            return
        prompt_values = {
            "title": self.title_prompt_edit.toPlainText(),
            "cover": self.cover_prompt_edit.toPlainText(),
        }
        worker = GenerateWorker(
            tasks,
            prompt_values,
            db_path=self.db_path,
            config=self.config,
            diagnostic_log_dir=diagnostics.DEFAULT_LOG_DIR,
        )
        worker.progress.connect(self._on_generate_progress)
        worker.row_updated.connect(self._on_generate_row_updated)
        worker.log.connect(self._on_generate_log)
        worker.failed.connect(self._on_generate_failed)
        worker.finished.connect(self._on_generate_finished)
        worker.cancelled.connect(self._on_generate_cancelled)
        self._reset_generate_run_log(tasks, generate_cover)
        self._reset_cmhub_balance_label()
        thread = run_worker(worker, thread_name="GenerateWorker", start=False)
        thread.finished.connect(lambda: self._forget_generate_thread(thread))
        self.generate_worker = worker
        self.generate_thread = thread
        self._set_generate_running(True)
        self._update_generate_progress(
            {
                "total": len(tasks),
                "title_done": 0,
                "cover_done": 0,
                "cover_total": len(tasks) if generate_cover else 0,
                "generated_done": 0,
                "failed": 0,
                "generate_cover": generate_cover,
            }
        )
        self._set_status(f"开始 AI 生成：{len(tasks)} 条")
        thread.start()

    def stop_generate(self, checked=False):
        if self.generate_worker is not None:
            self.generate_worker.cancel()
            self._append_generate_log("[停止] 已收到停止请求，当前正在运行的任务结束后停止")
            self._set_status("正在停止 AI 生成...")

    def reset_generated_result(self, checked=False):
        if self.generate_thread is not None:
            self._set_status("AI 生成正在进行，不能重置")
            return
        task = self._selected_task()
        if task is None:
            self._set_status("请选择要重置生成结果的任务")
            return
        has_ai_result = bool(getattr(task, "new_title", None) or getattr(task, "new_cover_path", None))
        if not has_ai_result and getattr(task, "stage", None) not in {"generated", "applied"}:
            self._set_status("选中任务没有可重置的生成结果")
            return
        lines = [
            "确定重置当前选中任务的本地生成结果吗？",
            "",
            f"商品ID：{task.item_id}",
            f"店铺：{self.model.account_name_for(task)}",
            "",
            "将清空新标题、新封面路径和错误信息，并退回到已采集状态。",
            "默认不删除本地新封面文件，不触碰 Shopee，也不会自动回写 Excel。",
        ]
        if getattr(task, "new_cover_path", None):
            lines.append(f"本地新封面文件保留：{task.new_cover_path}")
        if getattr(task, "committed", 0):
            lines.extend([
                "",
                "注意：该记录曾经提交过线上。本地重置不会回滚 Shopee，后续重新生成/更新可能再次提交线上。",
            ])
        answer = QMessageBox.question(
            self,
            "重置生成结果",
            "\n".join(lines),
            QMessageBox.Yes | QMessageBox.No,
            QMessageBox.No,
        )
        if answer != QMessageBox.Yes:
            self._set_status("已取消重置生成结果")
            return
        try:
            db.reset_generated(task.id, path=self.db_path)
            message = (
                "action=reset_generated step=db_write result=success "
                f"detail=清空AI生成结果 task_id={task.id}"
            )
            run_id = _write_reset_run_log(self.db_path, task, "reset_generated", message)
        except Exception as exc:
            QMessageBox.warning(self, "重置生成结果", str(exc))
            self._set_status(f"重置生成结果失败：{exc}")
            return
        self.refresh_tasks()
        self._append_generate_log(message)
        self._set_status(
            f"已重置生成结果：商品 {task.item_id}，run_id={run_id}"
        )

    def show_task_images(self, index):
        if index.isValid() and index.column() == 3:
            return
        task = self.model.task_at(index.row()) if index.isValid() else self._selected_task()
        if task is None:
            self._set_status("没有可预览的任务")
            return
        dialog = QDialog(self)
        dialog.setWindowTitle(f"封面对照：{task.item_id}")
        layout = QVBoxLayout(dialog)
        images_layout = QHBoxLayout()
        images_layout.addWidget(self._image_panel("旧封面", task.old_cover_path))
        images_layout.addWidget(self._image_panel("新封面", task.new_cover_path))
        layout.addLayout(images_layout)
        buttons = QDialogButtonBox(QDialogButtonBox.Close)
        buttons.rejected.connect(dialog.reject)
        layout.addWidget(buttons)
        dialog.resize(720, 420)
        dialog.exec()

    def _image_panel(self, title, path):
        panel = QWidget()
        layout = QVBoxLayout(panel)
        layout.addWidget(QLabel(title))
        image_label = QLabel()
        image_label.setAlignment(Qt.AlignCenter)
        image_label.setMinimumSize(260, 260)
        image_label.setWordWrap(True)
        if path and os.path.exists(str(path)):
            pixmap = QPixmap(str(path))
            if not pixmap.isNull():
                image_label.setPixmap(
                    pixmap.scaled(
                        260,
                        260,
                        Qt.KeepAspectRatio,
                        Qt.SmoothTransformation,
                    )
                )
            else:
                image_label.setText(f"图片无法读取\n{path}")
        else:
            image_label.setText(f"无图片\n{path or ''}".strip())
        layout.addWidget(image_label, 1)
        return panel

    def _set_generate_running(self, running):
        self.generate_button.setEnabled(not running)
        self.stop_generate_button.setEnabled(running)
        self.reset_generate_button.setEnabled(not running)
        self.refresh_button.setEnabled(not running)
        self.batch_filter.setEnabled(not running)
        self.shop_filter.setEnabled(not running)
        self.item_filter.setEnabled(not running)
        self.status_filter.setEnabled(not running)
        self.save_title_button.setEnabled(not running)
        self.new_cover_template_button.setEnabled(not running)
        self.save_cover_template_button.setEnabled(not running)
        self.cover_template_actions_button.setEnabled(not running)
        self.save_cover_template_as_action.setEnabled(not running)
        self.rename_cover_template_action.setEnabled(not running)
        self.delete_cover_template_action.setEnabled(not running)
        self.generate_cover_checkbox.setEnabled(not running)

    def _forget_generate_thread(self, thread):
        if self.generate_thread is thread:
            self.generate_thread = None
            self.generate_worker = None

    def _on_generate_progress(self, payload):
        self._update_generate_progress(payload)
        self._update_cmhub_balance_label(payload)
        self._set_status("生成进度：" + self._generate_progress_text(payload))

    def _on_generate_row_updated(self, task_id, fields):
        self.refresh_tasks()

    def _on_generate_failed(self, task_id, error):
        self._set_status(f"AI 生成失败：{error}")

    def _on_generate_finished(self, payload):
        self._set_generate_running(False)
        self.refresh_tasks()
        self._update_generate_progress(payload)
        self._update_cmhub_balance_label(payload)
        billing_error = payload.get("billing_error")
        if billing_error:
            self._show_billing_error(billing_error)
            return
        if payload.get("error"):
            self._set_status(f"AI 生成失败：{payload.get('error')}")
            return
        self._set_status("AI 生成完成：" + self._generate_progress_text(payload))

    def _on_generate_cancelled(self, payload):
        self._set_generate_running(False)
        self.refresh_tasks()
        self._update_generate_progress(payload)
        self._update_cmhub_balance_label(payload)
        billing_error = payload.get("billing_error")
        if billing_error:
            self._show_billing_error(billing_error)
            return
        self._set_status("AI 生成已停止：" + self._generate_progress_text(payload))

    def _update_generate_progress(self, payload):
        total = max(0, int(payload.get("total", 0) or 0))
        title_done = max(0, int(payload.get("title_done", 0) or 0))
        cover_done = max(0, int(payload.get("cover_done", 0) or 0))
        cover_total = self._cover_total_for_progress(payload, total)
        failed = max(0, int(payload.get("failed", 0) or 0))
        self.progress_label.setText("进度：" + self._generate_progress_text(payload))
        self.title_progress_label.setText(f"标题 {title_done}/{total}")
        self.cover_progress_label.setText(f"图片 {cover_done}/{cover_total}")
        self.failed_progress_label.setText(f"失败 {failed}")
        self._set_progress_bar(self.title_progress_bar, title_done, total)
        self._set_progress_bar(self.cover_progress_bar, cover_done, cover_total)

    def _reset_cmhub_balance_label(self):
        if self._is_cmhub_backend():
            self.cmhub_balance_label.setVisible(True)
            self.cmhub_balance_label.setText("cmhub余额：生成后刷新")
        else:
            self.cmhub_balance_label.setVisible(False)

    def _update_cmhub_balance_label(self, payload):
        if not self._is_cmhub_backend():
            self.cmhub_balance_label.setVisible(False)
            return
        self.cmhub_balance_label.setVisible(True)
        balance = payload.get("points_balance") if isinstance(payload, dict) else None
        if balance is None:
            if not self.cmhub_balance_label.text():
                self.cmhub_balance_label.setText("cmhub余额：未获取")
            return
        self.cmhub_balance_label.setText(f"cmhub余额：{balance}")

    def _is_cmhub_backend(self):
        try:
            return appconfig.ai_config(self.config).get("backend") == "cmhub"
        except Exception:
            return False

    def _show_billing_error(self, billing_error):
        message = billing_error.get("message") or "点数不足，请先充值。"
        QMessageBox.warning(self, "AI生成", message)
        self._set_status("AI 生成已中止：" + message)

    def _set_progress_bar(self, bar, done, total):
        maximum = max(1, int(total or 0))
        value = min(max(0, int(done or 0)), maximum)
        bar.setRange(0, maximum)
        bar.setValue(value)

    def _cover_total_for_progress(self, payload, total):
        cover_total = payload.get("cover_total")
        if cover_total is None:
            cover_total = total if payload.get("generate_cover", True) else 0
        return max(0, int(cover_total or 0))

    def _generate_progress_text(self, payload):
        total = max(0, int(payload.get("total", 0) or 0))
        cover_total = self._cover_total_for_progress(payload, total)
        return "标题{title}/{total} · 图片{cover}/{cover_total} · 失败{failed}".format(
            title=payload.get("title_done", 0),
            cover=payload.get("cover_done", 0),
            cover_total=cover_total,
            total=payload.get("total", 0),
            failed=payload.get("failed", 0),
        )

    def _selected_task(self):
        index = self.task_table.currentIndex()
        if index.isValid():
            return self.model.task_at(index.row())
        if self.model.rowCount() > 0:
            return self.model.task_at(0)
        return None

    def _prompt_context(self, task):
        return {
            "old_title": task.old_title,
            "new_title": task.new_title,
            "item_id": task.item_id,
            "account_name": self.model.account_name_for(task),
            "alias": task.alias,
        }

    def _ask_template_name(self, title, text=""):
        value, ok = QInputDialog.getText(
            self,
            title,
            "模板名",
            QLineEdit.Normal,
            text,
        )
        if not ok:
            return None
        return str(value).strip()

    def _show_prompt_error(self, error):
        message = str(error)
        QMessageBox.warning(self, "提示词管理", message)
        self._set_status(message)

    def refresh_tasks(self, checked=False):
        try:
            db.init_db(self.db_path)
            batches = db.list_batches(path=self.db_path)
            accounts_rows = accounts.list_accounts(path=self.db_path, config=self.config)
            selected_batch = self.batch_filter.currentData()
            selected_shop = self.shop_filter.currentData()
            selected_status = self.status_filter.currentData() or "all"
            item_query = self.item_filter.text().strip()
            self._populate_batch_filter(batches, selected_batch)
            selected_batch = self.batch_filter.currentData()
            batch_tasks = db.list_tasks(batch_id=selected_batch, path=self.db_path)
            self._populate_shop_filter(batch_tasks, accounts_rows, selected_shop)
            selected_shop = self.shop_filter.currentData()
            filtered_tasks = [
                task for task in batch_tasks
                if self._matches_shop(task, selected_shop)
                and self._matches_item(task, item_query)
                and self._matches_status(task, selected_status)
            ]
        except Exception as exc:
            self.model.set_tasks([], [])
            self.summary_label.setText("任务读取失败")
            _set_batch_progress_overview(self.batch_progress_label, [])
            _set_empty_state(self.empty_state_card, self.empty_state_label, self.empty_state_button)
            self._set_status(f"AI 生成任务读取失败：{exc}")
            return
        self.model.set_tasks(filtered_tasks, accounts_rows)
        self.summary_label.setText(
            f"任务 {len(filtered_tasks)}/{len(batch_tasks)} 条"
        )
        _set_batch_progress_overview(self.batch_progress_label, batch_tasks)
        self._update_empty_state(batch_tasks, filtered_tasks, accounts_rows)

    def _update_empty_state(self, batch_tasks, filtered_tasks, account_rows):
        if not account_rows:
            _set_empty_state(
                self.empty_state_card,
                self.empty_state_label,
                self.empty_state_button,
                "第一步：前往『④账号管理』配置并登录账号，再回到②生成标题和封面。",
                self.open_accounts_callback is not None,
            )
            return
        if not batch_tasks:
            _set_empty_state(
                self.empty_state_card,
                self.empty_state_label,
                self.empty_state_button,
                "还没有可生成任务。请先在①导入采集完成旧标题和旧封面采集。",
            )
            return
        if not filtered_tasks:
            _set_empty_state(
                self.empty_state_card,
                self.empty_state_label,
                self.empty_state_button,
                "当前筛选没有匹配的生成任务，请调整批次、店铺、商品ID或状态筛选。",
            )
            return
        _set_empty_state(self.empty_state_card, self.empty_state_label, self.empty_state_button)

    def _populate_batch_filter(self, batches, selected_batch):
        previous = selected_batch if selected_batch in {batch.id for batch in batches} else None
        self.batch_filter.blockSignals(True)
        self.batch_filter.clear()
        self.batch_filter.addItem("全部批次", None)
        for batch in batches:
            self.batch_filter.addItem(self._batch_label(batch), batch.id)
        index = self.batch_filter.findData(previous)
        self.batch_filter.setCurrentIndex(index if index >= 0 else 0)
        self.batch_filter.blockSignals(False)

    def _populate_shop_filter(self, tasks, account_rows, selected_shop):
        account_by_alias = {
            str(account.alias).strip(): account
            for account in account_rows
            if str(account.alias).strip()
        }
        aliases = []
        for task in tasks:
            alias = str(task.alias).strip()
            if alias and alias not in aliases:
                aliases.append(alias)
        previous = selected_shop if selected_shop in aliases else None
        self.shop_filter.blockSignals(True)
        self.shop_filter.clear()
        self.shop_filter.addItem("全部店铺", None)
        for alias in sorted(aliases, key=lambda value: self._shop_label(value, account_by_alias)):
            self.shop_filter.addItem(self._shop_label(alias, account_by_alias), alias)
        index = self.shop_filter.findData(previous)
        self.shop_filter.setCurrentIndex(index if index >= 0 else 0)
        self.shop_filter.blockSignals(False)

    def _batch_label(self, batch):
        source_files = batch.source_files
        first_file = os.path.basename(source_files[0]) if source_files else batch.id
        return f"{batch.created_at} · {first_file}"

    def _shop_label(self, alias, account_by_alias):
        account = account_by_alias.get(alias)
        if account is not None:
            return f"{account.account_name} ({alias})"
        return alias

    def _matches_shop(self, task, selected_shop):
        return selected_shop is None or str(task.alias).strip() == selected_shop

    def _matches_item(self, task, item_query):
        if not item_query:
            return True
        return item_query in str(getattr(task, "item_id", ""))

    def _matches_status(self, task, selected_status):
        if selected_status in (None, "all"):
            return True
        if selected_status == "to_generate":
            return task.stage == "collected" and task.status in {"success", "pending"}
        if selected_status == "generated":
            return task.stage == "generated"
        if selected_status == "applied":
            return task.stage == "applied"
        if selected_status == "failed":
            return task.status == "failed"
        if selected_status == "skipped":
            return task.status == "skipped"
        return True