#include "../evlist.h"
#include "../cache.h"
#include "../evsel.h"
#include "../sort.h"
#include "../hist.h"
#include "../helpline.h"
#include "gtk.h"

#define MAX_COLUMNS			32

static int __percent_color_snprintf(char *buf, size_t size, double percent)
{
	int ret = 0;
	const char *markup;

	markup = perf_gtk__get_percent_color(percent);
	if (markup)
		ret += scnprintf(buf, size, markup);

	ret += scnprintf(buf + ret, size - ret, " %6.2f%%", percent);

	if (markup)
		ret += scnprintf(buf + ret, size - ret, "</span>");

	return ret;
}


static int __hpp__color_fmt(struct perf_hpp *hpp, struct hist_entry *he,
			    u64 (*get_field)(struct hist_entry *))
{
	int ret;
	double percent = 0.0;
	struct hists *hists = he->hists;
	struct perf_evsel *evsel = hists_to_evsel(hists);

	if (hists->stats.total_period)
		percent = 100.0 * get_field(he) / hists->stats.total_period;

	ret = __percent_color_snprintf(hpp->buf, hpp->size, percent);

	if (perf_evsel__is_group_event(evsel)) {
		int prev_idx, idx_delta;
		struct hist_entry *pair;
		int nr_members = evsel->nr_members;

		prev_idx = perf_evsel__group_idx(evsel);

		list_for_each_entry(pair, &he->pairs.head, pairs.node) {
			u64 period = get_field(pair);
			u64 total = pair->hists->stats.total_period;

			evsel = hists_to_evsel(pair->hists);
			idx_delta = perf_evsel__group_idx(evsel) - prev_idx - 1;

			while (idx_delta--) {
				/*
				 * zero-fill group members in the middle which
				 * have no sample
				 */
				ret += __percent_color_snprintf(hpp->buf + ret,
								hpp->size - ret,
								0.0);
			}

			percent = 100.0 * period / total;
			ret += __percent_color_snprintf(hpp->buf + ret,
							hpp->size - ret,
							percent);

			prev_idx = perf_evsel__group_idx(evsel);
		}

		idx_delta = nr_members - prev_idx - 1;

		while (idx_delta--) {
			/*
			 * zero-fill group members at last which have no sample
			 */
			ret += __percent_color_snprintf(hpp->buf + ret,
							hpp->size - ret,
							0.0);
		}
	}
	return ret;
}

#define __HPP_COLOR_PERCENT_FN(_type, _field)					\
static u64 he_get_##_field(struct hist_entry *he)				\
{										\
	return he->stat._field;							\
}										\
										\
static int perf_gtk__hpp_color_##_type(struct perf_hpp_fmt *fmt __maybe_unused,	\
				       struct perf_hpp *hpp,			\
				       struct hist_entry *he)			\
{										\
	return __hpp__color_fmt(hpp, he, he_get_##_field);			\
}

__HPP_COLOR_PERCENT_FN(overhead, period)
__HPP_COLOR_PERCENT_FN(overhead_sys, period_sys)
__HPP_COLOR_PERCENT_FN(overhead_us, period_us)
__HPP_COLOR_PERCENT_FN(overhead_guest_sys, period_guest_sys)
__HPP_COLOR_PERCENT_FN(overhead_guest_us, period_guest_us)

#undef __HPP_COLOR_PERCENT_FN


void perf_gtk__init_hpp(void)
{
	perf_hpp__init();

	perf_hpp__format[PERF_HPP__OVERHEAD].color =
				perf_gtk__hpp_color_overhead;
	perf_hpp__format[PERF_HPP__OVERHEAD_SYS].color =
				perf_gtk__hpp_color_overhead_sys;
	perf_hpp__format[PERF_HPP__OVERHEAD_US].color =
				perf_gtk__hpp_color_overhead_us;
	perf_hpp__format[PERF_HPP__OVERHEAD_GUEST_SYS].color =
				perf_gtk__hpp_color_overhead_guest_sys;
	perf_hpp__format[PERF_HPP__OVERHEAD_GUEST_US].color =
				perf_gtk__hpp_color_overhead_guest_us;
}

static void callchain_list__sym_name(struct callchain_list *cl,
				     char *bf, size_t bfsize)
{
	if (cl->ms.sym)
		scnprintf(bf, bfsize, "%s", cl->ms.sym->name);
	else
		scnprintf(bf, bfsize, "%#" PRIx64, cl->ip);
}

static void perf_gtk__add_callchain(struct rb_root *root, GtkTreeStore *store,
				    GtkTreeIter *parent, int col, u64 total)
{
	struct rb_node *nd;
	bool has_single_node = (rb_first(root) == rb_last(root));

	for (nd = rb_first(root); nd; nd = rb_next(nd)) {
		struct callchain_node *node;
		struct callchain_list *chain;
		GtkTreeIter iter, new_parent;
		bool need_new_parent;
		double percent;
		u64 hits, child_total;

		node = rb_entry(nd, struct callchain_node, rb_node);

		hits = callchain_cumul_hits(node);
		percent = 100.0 * hits / total;

		new_parent = *parent;
		need_new_parent = !has_single_node && (node->val_nr > 1);

		list_for_each_entry(chain, &node->val, list) {
			char buf[128];

			gtk_tree_store_append(store, &iter, &new_parent);

			scnprintf(buf, sizeof(buf), "%5.2f%%", percent);
			gtk_tree_store_set(store, &iter, 0, buf, -1);

			callchain_list__sym_name(chain, buf, sizeof(buf));
			gtk_tree_store_set(store, &iter, col, buf, -1);

			if (need_new_parent) {
				/*
				 * Only show the top-most symbol in a callchain
				 * if it's not the only callchain.
				 */
				new_parent = iter;
				need_new_parent = false;
			}
		}

		if (callchain_param.mode == CHAIN_GRAPH_REL)
			child_total = node->children_hit;
		else
			child_total = total;

		/* Now 'iter' contains info of the last callchain_list */
		perf_gtk__add_callchain(&node->rb_root, store, &iter, col,
					child_total);
	}
}

static void on_row_activated(GtkTreeView *view, GtkTreePath *path,
			     GtkTreeViewColumn *col __maybe_unused,
			     gpointer user_data __maybe_unused)
{
	bool expanded = gtk_tree_view_row_expanded(view, path);

	if (expanded)
		gtk_tree_view_collapse_row(view, path);
	else
		gtk_tree_view_expand_row(view, path, FALSE);
}

static void perf_gtk__show_hists(GtkWidget *window, struct hists *hists,
				 float min_pcnt)
{
	struct perf_hpp_fmt *fmt;
	GType col_types[MAX_COLUMNS];
	GtkCellRenderer *renderer;
	struct sort_entry *se;
	GtkTreeStore *store;
	struct rb_node *nd;
	GtkWidget *view;
	int col_idx;
	int sym_col = -1;
	int nr_cols;
	char s[512];

	struct perf_hpp hpp = {
		.buf		= s,
		.size		= sizeof(s),
		.ptr		= hists_to_evsel(hists),
	};

	nr_cols = 0;

	perf_hpp__for_each_format(fmt)
		col_types[nr_cols++] = G_TYPE_STRING;

	list_for_each_entry(se, &hist_entry__sort_list, list) {
		if (se->elide)
			continue;

		if (se == &sort_sym)
			sym_col = nr_cols;

		col_types[nr_cols++] = G_TYPE_STRING;
	}

	store = gtk_tree_store_newv(nr_cols, col_types);

	view = gtk_tree_view_new();

	renderer = gtk_cell_renderer_text_new();

	col_idx = 0;

	perf_hpp__for_each_format(fmt) {
		fmt->header(fmt, &hpp);

		gtk_tree_view_insert_column_with_attributes(GTK_TREE_VIEW(view),
							    -1, ltrim(s),
							    renderer, "markup",
							    col_idx++, NULL);
	}

	list_for_each_entry(se, &hist_entry__sort_list, list) {
		if (se->elide)
			continue;

		gtk_tree_view_insert_column_with_attributes(GTK_TREE_VIEW(view),
							    -1, se->se_header,
							    renderer, "text",
							    col_idx++, NULL);
	}

	for (col_idx = 0; col_idx < nr_cols; col_idx++) {
		GtkTreeViewColumn *column;

		column = gtk_tree_view_get_column(GTK_TREE_VIEW(view), col_idx);
		gtk_tree_view_column_set_resizable(column, TRUE);

		if (col_idx == sym_col) {
			gtk_tree_view_set_expander_column(GTK_TREE_VIEW(view),
							  column);
		}
	}

	gtk_tree_view_set_model(GTK_TREE_VIEW(view), GTK_TREE_MODEL(store));

	g_object_unref(GTK_TREE_MODEL(store));

	for (nd = rb_first(&hists->entries); nd; nd = rb_next(nd)) {
		struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
		GtkTreeIter iter;
		float percent = h->stat.period * 100.0 /
					hists->stats.total_period;

		if (h->filtered)
			continue;

		if (percent < min_pcnt)
			continue;

		gtk_tree_store_append(store, &iter, NULL);

		col_idx = 0;

		perf_hpp__for_each_format(fmt) {
			if (fmt->color)
				fmt->color(fmt, &hpp, h);
			else
				fmt->entry(fmt, &hpp, h);

			gtk_tree_store_set(store, &iter, col_idx++, s, -1);
		}

		list_for_each_entry(se, &hist_entry__sort_list, list) {
			if (se->elide)
				continue;

			se->se_snprintf(h, s, ARRAY_SIZE(s),
					hists__col_len(hists, se->se_width_idx));

			gtk_tree_store_set(store, &iter, col_idx++, s, -1);
		}

		if (symbol_conf.use_callchain && sort__has_sym) {
			u64 total;

			if (callchain_param.mode == CHAIN_GRAPH_REL)
				total = h->stat.period;
			else
				total = hists->stats.total_period;

			perf_gtk__add_callchain(&h->sorted_chain, store, &iter,
						sym_col, total);
		}
	}

	gtk_tree_view_set_rules_hint(GTK_TREE_VIEW(view), TRUE);

	g_signal_connect(view, "row-activated",
			 G_CALLBACK(on_row_activated), NULL);
	gtk_container_add(GTK_CONTAINER(window), view);
}

int perf_evlist__gtk_browse_hists(struct perf_evlist *evlist,
				  const char *help,
				  struct hist_browser_timer *hbt __maybe_unused,
				  float min_pcnt)
{
	struct perf_evsel *pos;
	GtkWidget *vbox;
	GtkWidget *notebook;
	GtkWidget *info_bar;
	GtkWidget *statbar;
	GtkWidget *window;

	signal(SIGSEGV, perf_gtk__signal);
	signal(SIGFPE,  perf_gtk__signal);
	signal(SIGINT,  perf_gtk__signal);
	signal(SIGQUIT, perf_gtk__signal);
	signal(SIGTERM, perf_gtk__signal);

	window = gtk_window_new(GTK_WINDOW_TOPLEVEL);

	gtk_window_set_title(GTK_WINDOW(window), "perf report");

	g_signal_connect(window, "delete_event", gtk_main_quit, NULL);

	pgctx = perf_gtk__activate_context(window);
	if (!pgctx)
		return -1;

	vbox = gtk_vbox_new(FALSE, 0);

	notebook = gtk_notebook_new();

	gtk_box_pack_start(GTK_BOX(vbox), notebook, TRUE, TRUE, 0);

	info_bar = perf_gtk__setup_info_bar();
	if (info_bar)
		gtk_box_pack_start(GTK_BOX(vbox), info_bar, FALSE, FALSE, 0);

	statbar = perf_gtk__setup_statusbar();
	gtk_box_pack_start(GTK_BOX(vbox), statbar, FALSE, FALSE, 0);

	gtk_container_add(GTK_CONTAINER(window), vbox);

	evlist__for_each(evlist, pos) {
		struct hists *hists = &pos->hists;
		const char *evname = perf_evsel__name(pos);
		GtkWidget *scrolled_window;
		GtkWidget *tab_label;
		char buf[512];
		size_t size = sizeof(buf);

		if (symbol_conf.event_group) {
			if (!perf_evsel__is_group_leader(pos))
				continue;

			if (pos->nr_members > 1) {
				perf_evsel__group_desc(pos, buf, size);
				evname = buf;
			}
		}

		scrolled_window = gtk_scrolled_window_new(NULL, NULL);

		gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolled_window),
							GTK_POLICY_AUTOMATIC,
							GTK_POLICY_AUTOMATIC);

		perf_gtk__show_hists(scrolled_window, hists, min_pcnt);

		tab_label = gtk_label_new(evname);

		gtk_notebook_append_page(GTK_NOTEBOOK(notebook), scrolled_window, tab_label);
	}

	gtk_widget_show_all(window);

	perf_gtk__resize_window(window);

	gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);

	ui_helpline__push(help);

	gtk_main();

	perf_gtk__deactivate_context(&pgctx);

	return 0;
}