#include "parser.h"
#include "params.h"
#include "paths.h"

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

const char *conf_filename = "/boot/petitboot.conf";

static struct boot_option *cur_opt;
static struct device *dev;
static const char *devpath;
int device_added;

int check_and_add_device(struct device *dev)
{
	if (!dev->icon_file)
		dev->icon_file = strdup(generic_icon_file(guess_device_type()));

	return !add_device(dev);
}

static int section(char *section_name)
{
	if (!device_added++ && !check_and_add_device(dev))
		return 0;

	if (cur_opt) {
		add_boot_option(cur_opt);
		free_boot_option(cur_opt);
	}

	cur_opt = malloc(sizeof(*cur_opt));
	memset(cur_opt, 0, sizeof(*cur_opt));
	return 1;
}


static void set_boot_option_parameter(struct boot_option *opt,
		const char *name, const char *value)
{
	if (streq(name, "name"))
		opt->name = strdup(value);

	else if (streq(name, "description"))
		opt->description = strdup(value);

	else if (streq(name, "image"))
		opt->boot_image_file = resolve_path(value, devpath);

	else if (streq(name, "icon"))
		opt->icon_file = resolve_path(value, devpath);

	else if (streq(name, "initrd"))
		opt->initrd_file =resolve_path(value, devpath);

	else if (streq(name, "args"))
		opt->boot_args = strdup(value);

	else
		fprintf(stderr, "Unknown parameter %s\n", name);
}

static void set_device_parameter(struct device *dev,
		const char *name, const char *value)
{
	if (streq(name, "name"))
		dev->name = strdup(value);

	else if (streq(name, "description"))
		dev->description = strdup(value);

	else if (streq(name, "icon"))
		dev->icon_file = resolve_path(value, devpath);
}

static int parameter(char *param_name, char *param_value)
{
	if (cur_opt)
		set_boot_option_parameter(cur_opt, param_name, param_value);
	else
		set_device_parameter(dev, param_name, param_value);
	return 1;
}


int parse(const char *device)
{
	char *filepath;
	int rc;

	filepath = resolve_path(conf_filename, device);

	cur_opt = NULL;
	dev = malloc(sizeof(*dev));
	memset(dev, 0, sizeof(*dev));
	dev->id = strdup(device);

	rc = pm_process(filepath, section, parameter);
	if (!rc)
		return 0;

	if (cur_opt) {
		add_boot_option(cur_opt);
		free_boot_option(cur_opt);
	}

	cur_opt = NULL;

	free(filepath);

	return 1;
}

struct parser native_parser = {
	.name = "native petitboot parser",
	.priority = 100,
	.parse	  = parse
};