/*

 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>

 * Released under the terms of the GNU GPL v2.0.

 */

#include <stdlib.h>

#include <string.h>

#define LKC_DIRECT_LINK

#include "lkc.h"

struct menu rootmenu;

static struct menu **last_entry_ptr;

struct file *file_list;

struct file *current_file;

static void menu_warn(struct menu *menu, const char *fmt, ...)

{

	va_list ap;

	va_start(ap, fmt);

	fprintf(stderr, "%s:%d:warning: ", menu->file->name, menu->lineno);

	vfprintf(stderr, fmt, ap);

	fprintf(stderr, "\n");

	va_end(ap);

}

static void prop_warn(struct property *prop, const char *fmt, ...)

{

	va_list ap;

	va_start(ap, fmt);

	fprintf(stderr, "%s:%d:warning: ", prop->file->name, prop->lineno);

	vfprintf(stderr, fmt, ap);

	fprintf(stderr, "\n");

	va_end(ap);

}

void menu_init(void)

{

	current_entry = current_menu = &rootmenu;

	last_entry_ptr = &rootmenu.list;

}

void menu_add_entry(struct symbol *sym)

{

	struct menu *menu;

	menu = malloc(sizeof(*menu));

	memset(menu, 0, sizeof(*menu));

	menu->sym = sym;

	menu->parent = current_menu;

	menu->file = current_file;

	menu->lineno = zconf_lineno();

	*last_entry_ptr = menu;

	last_entry_ptr = &menu->next;

	current_entry = menu;

}

void menu_end_entry(void)

{

}

struct menu *menu_add_menu(void)

{

	menu_end_entry();

	last_entry_ptr = &current_entry->list;

	return current_menu = current_entry;

}

void menu_end_menu(void)

{

	last_entry_ptr = &current_menu->next;

	current_menu = current_menu->parent;

}

struct expr *menu_check_dep(struct expr *e)

{

	if (!e)

		return e;

	switch (e->type) {

	case E_NOT:

		e->left.expr = menu_check_dep(e->left.expr);

		break;

	case E_OR:

	case E_AND:

		e->left.expr = menu_check_dep(e->left.expr);

		e->right.expr = menu_check_dep(e->right.expr);

		break;

	case E_SYMBOL:

		/* change 'm' into 'm' && MODULES */

		if (e->left.sym == &symbol_mod)

			return expr_alloc_and(e, expr_alloc_symbol(modules_sym));

		break;

	default:

		break;

	}

	return e;

}

void menu_add_dep(struct expr *dep)

{

	current_entry->dep = expr_alloc_and(current_entry->dep, menu_check_dep(dep));

}

void menu_set_type(int type)

{

	struct symbol *sym = current_entry->sym;

	if (sym->type == type)

		return;

	if (sym->type == S_UNKNOWN) {

		sym->type = type;

		return;

	}

	menu_warn(current_entry, "type of '%s' redefined from '%s' to '%s'",

	    sym->name ? sym->name : "<choice>",

	    sym_type_name(sym->type), sym_type_name(type));

}

struct property *menu_add_prop(enum prop_type type, char *prompt, struct expr *expr, struct expr *dep)

{

	struct property *prop = prop_alloc(type, current_entry->sym);

	prop->menu = current_entry;

	prop->expr = expr;

	prop->visible.expr = menu_check_dep(dep);

	if (prompt) {

		if (isspace(*prompt)) {

			prop_warn(prop, "leading whitespace ignored");

			while (isspace(*prompt))

				prompt++;

		}

		if (current_entry->prompt)

			prop_warn(prop, "prompt redefined");

		current_entry->prompt = prop;

	}

	prop->text = prompt;

	return prop;

}

struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)

{

	return menu_add_prop(type, prompt, NULL, dep);

}

void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)

{

	menu_add_prop(type, NULL, expr, dep);

}

void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)

{

	menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);

}

void menu_add_option(int token, char *arg)

{

	struct property *prop;

	switch (token) {

	case T_OPT_MODULES:

		prop = prop_alloc(P_DEFAULT, modules_sym);

		prop->expr = expr_alloc_symbol(current_entry->sym);

		break;

	case T_OPT_DEFCONFIG_LIST:

		if (!sym_defconfig_list)

			sym_defconfig_list = current_entry->sym;

		else if (sym_defconfig_list != current_entry->sym)

			zconf_error("trying to redefine defconfig symbol");

		break;

	}

}

static int menu_range_valid_sym(struct symbol *sym, struct symbol *sym2)

{

	return sym2->type == S_INT || sym2->type == S_HEX ||

	       (sym2->type == S_UNKNOWN && sym_string_valid(sym, sym2->name));

}

void sym_check_prop(struct symbol *sym)

{

	struct property *prop;

	struct symbol *sym2;

	for (prop = sym->prop; prop; prop = prop->next) {

		switch (prop->type) {

		case P_DEFAULT:

			if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&

			    prop->expr->type != E_SYMBOL)

				prop_warn(prop,

				    "default for config symbol '%'"

				    " must be a single symbol", sym->name);

			break;

		case P_SELECT:

			sym2 = prop_get_symbol(prop);

			if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)

				prop_warn(prop,

				    "config symbol '%s' uses select, but is "

				    "not boolean or tristate", sym->name);

			else if (sym2->type == S_UNKNOWN)

				prop_warn(prop,

				    "'select' used by config symbol '%s' "

				    "refer to undefined symbol '%s'",

				    sym->name, sym2->name);

			else if (sym2->type != S_BOOLEAN && sym2->type != S_TRISTATE)

				prop_warn(prop,

				    "'%s' has wrong type. 'select' only "

				    "accept arguments of boolean and "

				    "tristate type", sym2->name);

			break;

		case P_RANGE:

			if (sym->type != S_INT && sym->type != S_HEX)

				prop_warn(prop, "range is only allowed "

				                "for int or hex symbols");

			if (!menu_range_valid_sym(sym, prop->expr->left.sym) ||

			    !menu_range_valid_sym(sym, prop->expr->right.sym))

				prop_warn(prop, "range is invalid");

			break;

		default:

			;

		}

	}

}

void menu_finalize(struct menu *parent)

{

	struct menu *menu, *last_menu;

	struct symbol *sym;

	struct property *prop;

	struct expr *parentdep, *basedep, *dep, *dep2, **ep;

	sym = parent->sym;

	if (parent->list) {

		if (sym && sym_is_choice(sym)) {

			/* find the first choice value and find out choice type */

			for (menu = parent->list; menu; menu = menu->next) {

				if (menu->sym) {

					current_entry = parent;

					menu_set_type(menu->sym->type);

					current_entry = menu;

					menu_set_type(sym->type);

					break;

				}

			}

			parentdep = expr_alloc_symbol(sym);

		} else if (parent->prompt)

			parentdep = parent->prompt->visible.expr;

		else

			parentdep = parent->dep;

		for (menu = parent->list; menu; menu = menu->next) {

			basedep = expr_transform(menu->dep);

			basedep = expr_alloc_and(expr_copy(parentdep), basedep);

			basedep = expr_eliminate_dups(basedep);

			menu->dep = basedep;

			if (menu->sym)

				prop = menu->sym->prop;

			else

				prop = menu->prompt;

			for (; prop; prop = prop->next) {

				if (prop->menu != menu)

					continue;

				dep = expr_transform(prop->visible.expr);

				dep = expr_alloc_and(expr_copy(basedep), dep);

				dep = expr_eliminate_dups(dep);

				if (menu->sym && menu->sym->type != S_TRISTATE)

					dep = expr_trans_bool(dep);

				prop->visible.expr = dep;

				if (prop->type == P_SELECT) {

					struct symbol *es = prop_get_symbol(prop);

					es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,

							expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));

				}

			}

		}

		for (menu = parent->list; menu; menu = menu->next)

			menu_finalize(menu);

	} else if (sym) {

		basedep = parent->prompt ? parent->prompt->visible.expr : NULL;

		basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);

		basedep = expr_eliminate_dups(expr_transform(basedep));

		last_menu = NULL;

		for (menu = parent->next; menu; menu = menu->next) {

			dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;

			if (!expr_contains_symbol(dep, sym))

				break;

			if (expr_depends_symbol(dep, sym))

				goto next;

			dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);

			dep = expr_eliminate_dups(expr_transform(dep));

			dep2 = expr_copy(basedep);

			expr_eliminate_eq(&dep, &dep2);

			expr_free(dep);

			if (!expr_is_yes(dep2)) {

				expr_free(dep2);

				break;

			}

			expr_free(dep2);

		next:

			menu_finalize(menu);

			menu->parent = parent;

			last_menu = menu;

		}

		if (last_menu) {

			parent->list = parent->next;

			parent->next = last_menu->next;

			last_menu->next = NULL;

		}

	}

	for (menu = parent->list; menu; menu = menu->next) {

		if (sym && sym_is_choice(sym) && menu->sym) {

			menu->sym->flags |= SYMBOL_CHOICEVAL;

			if (!menu->prompt)

				menu_warn(menu, "choice value must have a prompt");

			for (prop = menu->sym->prop; prop; prop = prop->next) {

				if (prop->type == P_PROMPT && prop->menu != menu) {

					prop_warn(prop, "choice values "

					    "currently only support a "

					    "single prompt");

				}

				if (prop->type == P_DEFAULT)

					prop_warn(prop, "defaults for choice "

					    "values not supported");

			}

			current_entry = menu;

			menu_set_type(sym->type);

			menu_add_symbol(P_CHOICE, sym, NULL);

			prop = sym_get_choice_prop(sym);

			for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)

				;

			*ep = expr_alloc_one(E_CHOICE, NULL);

			(*ep)->right.sym = menu->sym;

		}

		if (menu->list && (!menu->prompt || !menu->prompt->text)) {

			for (last_menu = menu->list; ; last_menu = last_menu->next) {

				last_menu->parent = parent;

				if (!last_menu->next)

					break;

			}

			last_menu->next = menu->next;

			menu->next = menu->list;

			menu->list = NULL;

		}

	}

	if (sym && !(sym->flags & SYMBOL_WARNED)) {

		if (sym->type == S_UNKNOWN)

			menu_warn(parent, "config symbol defined without type");

		if (sym_is_choice(sym) && !parent->prompt)

			menu_warn(parent, "choice must have a prompt");

		/* Check properties connected to this symbol */

		sym_check_prop(sym);

		sym->flags |= SYMBOL_WARNED;

	}

	if (sym && !sym_is_optional(sym) && parent->prompt) {

		sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,

				expr_alloc_and(parent->prompt->visible.expr,

					expr_alloc_symbol(&symbol_mod)));

	}

}

bool menu_is_visible(struct menu *menu)

{

	struct menu *child;

	struct symbol *sym;

	tristate visible;

	if (!menu->prompt)

		return false;

	sym = menu->sym;

	if (sym) {

		sym_calc_value(sym);

		visible = menu->prompt->visible.tri;

	} else

		visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);

	if (visible != no)

		return true;

	if (!sym || sym_get_tristate_value(menu->sym) == no)

		return false;

	for (child = menu->list; child; child = child->next)

		if (menu_is_visible(child))

			return true;

	return false;

}

const char *menu_get_prompt(struct menu *menu)

{

	if (menu->prompt)

		return _(menu->prompt->text);

	else if (menu->sym)

		return _(menu->sym->name);

	return NULL;

}

struct menu *menu_get_root_menu(struct menu *menu)

{

	return &rootmenu;

}

struct menu *menu_get_parent_menu(struct menu *menu)

{

	enum prop_type type;

	for (; menu != &rootmenu; menu = menu->parent) {

		type = menu->prompt ? menu->prompt->type : 0;

		if (type == P_MENU)

			break;

	}

	return menu;

}