// src/screens/algo_trading/StrategyListPanel.h
#pragma once
#include "services/algo_trading/AlgoTradingTypes.h"

#include <QComboBox>
#include <QEvent>
#include <QLabel>
#include <QLineEdit>
#include <QPushButton>
#include <QTableWidget>
#include <QVBoxLayout>
#include <QWidget>

namespace fincept::screens {

/// Strategy list — compact paginated table of DSL strategies loaded from the
/// algo_strategies DB table (curated library + user-created). Per-row EDIT opens
/// the Builder pre-filled; DEPLOY and DELETE act on the strategy.
class StrategyListPanel : public QWidget {
    Q_OBJECT
  public:
    explicit StrategyListPanel(QWidget* parent = nullptr);

  signals:
    void edit_requested(fincept::services::algo::AlgoStrategy strategy);
    void backtest_requested(fincept::services::algo::AlgoStrategy strategy, QString symbol, QString start_date,
                            QString end_date);

  private slots:
    void on_strategies_loaded(QVector<fincept::services::algo::AlgoStrategy> strategies);
    void on_sort_changed(int index);
    void on_error(const QString& context, const QString& msg);
    void on_filter_changed(const QString& text);
    void on_edit_clicked(int row);
    void on_backtest_clicked(int row);
    void on_deploy_clicked(int row);
    void on_delete_clicked(int row);
    void go_to_page(int page);

  protected:
    void changeEvent(QEvent* event) override;

  private:
    void build_ui();
    void connect_service();
    void render_page();
    void update_pagination_controls();
    /// Sort `filtered_` by the sort combo's current selection. Called after every
    /// rebuild of `filtered_` so the sort survives search/category changes.
    void apply_sort();
    void retranslateUi();

    static constexpr int kPageSize = 50;

    QLineEdit* search_edit_ = nullptr;
    QLabel* sort_caption_ = nullptr;
    QLabel* count_label_ = nullptr;
    QComboBox* sort_combo_ = nullptr;
    QComboBox* cat_combo_ = nullptr;
    QTableWidget* table_ = nullptr;
    QLabel* page_label_ = nullptr;
    QPushButton* prev_btn_ = nullptr;
    QPushButton* next_btn_ = nullptr;

    QVector<fincept::services::algo::AlgoStrategy> strategies_; // full list
    QVector<fincept::services::algo::AlgoStrategy> filtered_;   // after search/sort
    int current_page_ = 0;                                      // 0-based
};

} // namespace fincept::screens