/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright (C) 2019, Google Inc.
 *
 * main.cpp - cam - The libcamera swiss army knife
 */

#include <iomanip>
#include <iostream>
#include <signal.h>
#include <string.h>

#include <libcamera/libcamera.h>
#include <libcamera/property_ids.h>

#include "capture.h"
#include "event_loop.h"
#include "main.h"
#include "options.h"

using namespace libcamera;

class CamApp
{
public:
	CamApp();
	~CamApp();

	static CamApp *instance();

	int init(int argc, char **argv);
	void cleanup();

	int exec();
	void quit();

private:
	int parseOptions(int argc, char *argv[]);
	int prepareConfig();
	int listProperties();
	int infoConfiguration();
	int run();

	static CamApp *app_;
	OptionsParser::Options options_;
	CameraManager *cm_;
	std::shared_ptr<Camera> camera_;
	std::unique_ptr<libcamera::CameraConfiguration> config_;
	EventLoop *loop_;
};

CamApp *CamApp::app_ = nullptr;

CamApp::CamApp()
	: cm_(nullptr), camera_(nullptr), config_(nullptr), loop_(nullptr)
{
	CamApp::app_ = this;
}

CamApp::~CamApp()
{
	delete cm_;
}

CamApp *CamApp::instance()
{
	return CamApp::app_;
}

int CamApp::init(int argc, char **argv)
{
	int ret;

	ret = parseOptions(argc, argv);
	if (ret < 0)
		return ret;

	cm_ = new CameraManager();

	ret = cm_->start();
	if (ret) {
		std::cout << "Failed to start camera manager: "
			  << strerror(-ret) << std::endl;
		return ret;
	}

	if (options_.isSet(OptCamera)) {
		const std::string &cameraName = options_[OptCamera];
		char *endptr;
		unsigned long index = strtoul(cameraName.c_str(), &endptr, 10);
		if (*endptr == '\0' && index > 0 && index <= cm_->cameras().size())
			camera_ = cm_->cameras()[index - 1];
		else
			camera_ = cm_->get(cameraName);

		if (!camera_) {
			std::cout << "Camera "
				  << std::string(options_[OptCamera])
				  << " not found" << std::endl;
			cm_->stop();
			return -ENODEV;
		}

		if (camera_->acquire()) {
			std::cout << "Failed to acquire camera" << std::endl;
			camera_.reset();
			cm_->stop();
			return -EINVAL;
		}

		std::cout << "Using camera " << camera_->name() << std::endl;

		ret = prepareConfig();
		if (ret)
			return ret;
	}

	loop_ = new EventLoop(cm_->eventDispatcher());

	return 0;
}

void CamApp::cleanup()
{
	delete loop_;
	loop_ = nullptr;

	if (camera_) {
		camera_->release();
		camera_.reset();
	}

	config_.reset();

	cm_->stop();
}

int CamApp::exec()
{
	int ret;

	ret = run();
	cleanup();

	return ret;
}

void CamApp::quit()
{
	if (loop_)
		loop_->exit();
}

int CamApp::parseOptions(int argc, char *argv[])
{
	KeyValueParser streamKeyValue;
	streamKeyValue.addOption("role", OptionString,
				 "Role for the stream (viewfinder, video, still, stillraw)",
				 ArgumentRequired);
	streamKeyValue.addOption("width", OptionInteger, "Width in pixels",
				 ArgumentRequired);
	streamKeyValue.addOption("height", OptionInteger, "Height in pixels",
				 ArgumentRequired);
	streamKeyValue.addOption("pixelformat", OptionInteger, "Pixel format",
				 ArgumentRequired);

	OptionsParser parser;
	parser.addOption(OptCamera, OptionString,
			 "Specify which camera to operate on, by name or by index", "camera",
			 ArgumentRequired, "camera");
	parser.addOption(OptCapture, OptionNone,
			 "Capture until interrupted by user", "capture");
	parser.addOption(OptFile, OptionString,
			 "Write captured frames to disk\n"
			 "The first '#' character in the file name is expanded to the stream name and frame sequence number.\n"
			 "The default file name is 'frame-#.bin'.",
			 "file", ArgumentOptional, "filename");
	parser.addOption(OptStream, &streamKeyValue,
			 "Set configuration of a camera stream", "stream", true);
	parser.addOption(OptHelp, OptionNone, "Display this help message",
			 "help");
	parser.addOption(OptInfo, OptionNone,
			 "Display information about stream(s)", "info");
	parser.addOption(OptList, OptionNone, "List all cameras", "list");
	parser.addOption(OptProps, OptionNone, "List cameras properties",
			 "list-properties");

	options_ = parser.parse(argc, argv);
	if (!options_.valid())
		return -EINVAL;

	if (options_.empty() || options_.isSet(OptHelp)) {
		parser.usage();
		return options_.empty() ? -EINVAL : -EINTR;
	}

	return 0;
}

int CamApp::prepareConfig()
{
	StreamRoles roles;

	if (options_.isSet(OptStream)) {
		const std::vector<OptionValue> &streamOptions =
			options_[OptStream].toArray();

		/* Use roles and get a default configuration. */
		for (auto const &value : streamOptions) {
			KeyValueParser::Options opt = value.toKeyValues();

			std::string role = opt.isSet("role")
					 ? opt["role"].toString()
					 : "viewfinder";

			if (role == "viewfinder") {
				roles.push_back(StreamRole::Viewfinder);
			} else if (role == "video") {
				roles.push_back(StreamRole::VideoRecording);
			} else if (role == "still") {
				roles.push_back(StreamRole::StillCapture);
			} else if (role == "stillraw") {
				roles.push_back(StreamRole::StillCaptureRaw);
			} else {
				std::cerr << "Unknown stream role "
					  << role << std::endl;
				return -EINVAL;
			}
		}
	} else {
		/* If no configuration is provided assume a single video stream. */
		roles.push_back(StreamRole::VideoRecording);
	}

	config_ = camera_->generateConfiguration(roles);
	if (!config_ || config_->size() != roles.size()) {
		std::cerr << "Failed to get default stream configuration"
			  << std::endl;
		return -EINVAL;
	}

	/* Apply configuration if explicitly requested. */
	if (options_.isSet(OptStream)) {
		const std::vector<OptionValue> &streamOptions =
			options_[OptStream].toArray();

		unsigned int i = 0;
		for (auto const &value : streamOptions) {
			KeyValueParser::Options opt = value.toKeyValues();
			StreamConfiguration &<span class="hl com">/* SPDX-License-Identifier: BSD-2-Clause */</span>
<span class="hl com">/*</span>
<span class="hl com"> * Copyright (C) 2019, Raspberry Pi Ltd</span>
<span class="hl com"> *</span>
<span class="hl com"> * algorithm.h - ISP control algorithm interface</span>
<span class="hl com"> */</span>
<span class="hl ppc">#pragma once</span>

<span class="hl com">/*</span>
<span class="hl com"> * All algorithms should be derived from this class and made available to the</span>
<span class="hl com"> * Controller.</span>
<span class="hl com"> */</span>

<span class="hl ppc">#include &lt;string&gt;</span>
<span class="hl ppc">#include &lt;memory&gt;</span>
<span class="hl ppc">#include &lt;map&gt;</span>

<span class="hl ppc">#include</span> <span class="hl pps">&quot;libcamera/internal/yaml_parser.h&quot;</span><span class="hl ppc"></span>

<span class="hl ppc">#include</span> <span class="hl pps">&quot;controller.h&quot;</span><span class="hl ppc"></span>

<span class="hl kwa">namespace</span> RPiController <span class="hl opt">{</span>

<span class="hl com">/* This defines the basic interface for all control algorithms. */</span>

<span class="hl kwc">class</span> Algorithm
<span class="hl opt">{</span>
<span class="hl kwc">public</span><span class="hl opt">:</span>
	<span class="hl kwd">Algorithm</span><span class="hl opt">(</span>Controller <span class="hl opt">*</span>controller<span class="hl opt">)</span>
		<span class="hl opt">:</span> <span class="hl kwd">controller_</span><span class="hl opt">(</span>controller<span class="hl opt">)</span>
	<span class="hl opt">{</span>
	<span class="hl opt">}</span>
	<span class="hl kwc">virtual</span> <span class="hl opt">~</span><span class="hl kwd">Algorithm</span><span class="hl opt">() =</span> <span class="hl kwa">default</span><span class="hl opt">;</span>
	<span class="hl kwc">virtual</span> <span class="hl kwb">char const</span> <span class="hl opt">*</span><span class="hl kwd">name</span><span class="hl opt">()</span> <span class="hl kwb">const</span> <span class="hl opt">=</span> <span class="hl num">0</span><span class="hl opt">;</span>
	<span class="hl kwc">virtual</span> <span class="hl kwb">int</span> <span class="hl kwd">read</span><span class="hl opt">(</span><span class="hl kwb">const</span> <span class="hl kwc">libcamera</span><span class="hl opt">::</span>YamlObject <span class="hl opt">&amp;</span>params<span class="hl opt">);</span>
	<span class="hl kwc">virtual</span> <span class="hl kwb">void</span> <span class="hl kwd">initialise</span><span class="hl opt">();</span>
	<span class="hl kwc">virtual</span> <span class="hl kwb">void</span> <span class="hl kwd">switchMode</span><span class="hl opt">(</span