/*
 * Copyright (C) 2016 Jared Boone, ShareBrained Technology, Inc.
 * Copyright (C) 2016 Furrtek
 * Copyleft  (ↄ) 2022 NotPike
 *
 * This file is part of PortaPack.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */

#include "ui_playlist.hpp"
#include "string_format.hpp"

#include "ui_fileman.hpp"
#include "io_file.hpp"

#include "baseband_api.hpp"
#include "portapack.hpp"
#include "portapack_persistent_memory.hpp"
#include <unistd.h>

using namespace portapack;

namespace ui {

void PlaylistView::set_ready() {
	ready_signal = true;
}


	void PlaylistView::load_file(std::filesystem::path playlist_path) {
		File playlist_file;
		
		auto error = playlist_file.open(playlist_path.string());
		if (!error.is_valid()) {
			std::string line;
			char one_char[1];
			for (size_t pointer =0 ; pointer < playlist_file.size(); pointer++) {
				playlist_file.seek(pointer);
				playlist_file.read(one_char, 1);
				if ((int) one_char[0] >= ' ') {
					line += one_char[0];
				} else if (one_char[0] == '\n') {
					txtline_process(line); 
					line.clear();
				}
			}
			if (line.length() > 0) {
				txtline_process(line); 
			}
		}
		playlist_masterdb = playlist_db;
		return ;
		}


	void PlaylistView::txtline_process(std::string &line) {
		playlist_entry new_item;
				rf::Frequency f;
				size_t previous = 0;
				size_t current = line.find(',');
				std::string freqs = line.substr(0, current);
				previous = current +1;
				current = line.find(',', previous);
				std::string file = line.substr(previous, current - previous);
				previous = current +1;
				current = line.find(',', previous);
				uint32_t sample_rate = strtoll(line.substr(previous).c_str(), nullptr,  10);

				f = strtoll(freqs.c_str(), nullptr, 0);
				new_item.replay_frequency = f;
				new_item.replay_file = "/" + file;
				new_item.sample_rate = sample_rate;
				new_item.next_delay = 0;

					playlist_db.push_back(std::move(new_item));
	}

void PlaylistView::on_file_changed(std::filesystem::path new_file_path, rf::Frequency replay_frequency, uint32_t replay_sample_rate) {
	File data_file;	
	// Get file size
	auto data_open_error = data_file.open("/" + new_file_path.string());
	if (data_open_error.is_valid()) {
		file_error();
		return;
	}
	
	file_path = new_file_path;
	field_frequency.set_value(replay_frequency);
	
	sample_rate = replay_sample_rate;
	
	text_sample_rate.set(unit_auto_scale(sample_rate, 3, 0) + "Hz");
	
	auto file_size = data_file.size();
	auto duration = (file_size * 1000) / (2 * 2 * sample_rate);
	
	progressbar.set_max(file_size);
	text_filename.set(file_path.filename().string().substr(0, 12));
	text_duration.set(to_string_time_ms(duration));
	
	button_play.focus();
}

void PlaylistView::on_tx_progress(const uint32_t progress) {
	progressbar.set_value(progress);
}

void PlaylistView::focus() {
	button_open.focus();
}

void PlaylistView::file_error() {
	nav_.display_modal("Error", "File "+file_path.string() +" read error. " +file_path.string());
}

bool PlaylistView::is_active() const {
	return (bool)replay_thread;
}

bool PlaylistView::loop() const {
	return (bool) playlist_db.size();
}

void PlaylistView::toggle() {
	if( is_active() ) {
		stop(false);
	} else {

		start();
	}
}

void PlaylistView::start() {
	stop(false);

		playlist_entry item = playlist_db.front();
		playlist_db.pop_front();
	//	playlist_entry item = playlist_db[0];
	//	for (playlist_entry item : playlist_db) {
	//	file_path = item.replay_file;
	//	rf::Frequency replay_frequency = strtoll(item.replay_frequency.c_str(),nullptr,10);
		on_file_changed(item.replay_file, item.replay_frequency, item.sample_rate);
		on_target_frequency_changed(item.replay_frequency);

		std::unique_ptr<stream::Reader> reader;
		
		auto p = std::make_unique<FileReader>();
		auto open_error = p->open(file_path);
		if( open_error.is_valid() ) {
			file_error();
			return;                               // Fixes TX bug if there's a file error
		} else {
			reader = std::move(p);
		}

		if( reader ) {
			button_play.set_bitmap(&bitmap_stop);
			baseband::set_sample_rate(sample_rate * 8);
			
			replay_thread = std::make_unique<ReplayThread>(
				std::move(reader),
				read_size, buffer_count,
				&ready_signal,
				[](uint32_t return_code) {
					ReplayThreadDoneMessage message { return_code };
					EventDispatcher::send_message(message);
				}
			);
		}

		//Enable Bias Tee if selected
		radio::set_antenna_bias(portapack::get_antenna_bias());

		rf_amp =(transmitter_model.rf_amp() );	// recover rf_amp settings applied from ui_transmiter.cpp	

		radio::enable({
			receiver_model.tuning_frequency(),
			sample_rate * 8,
			baseband_bandwidth,
			rf::Direction::Transmit,
			rf_amp,         //  previous code line : "receiver_model.rf_amp()," was passing the same rf_amp of all Receiver Apps  
			static_cast<int8_t>(receiver_model.lna()),
			static_cast<int8_t>(receiver_model.vga())
		});  

//	}
} 

void PlaylistView::stop(const bool do_loop) {
	if( is_active() ) {
		replay_thread.reset();
	}
	if (do_loop) {
		if (playlist_db.size() > 0 ) {
			start();
		} else {
			playlist_db = playlist_masterdb;
			start();
		}
	} else {
		radio::set_antenna_bias(false);    //Turn off Bias Tee
		radio::disable();
		button_play.set_bitmap(&bitmap_play);
	}
	
	ready_signal = false;
}

void PlaylistView::handle_replay_thread_done(const uint32_t return_code) {
	if (return_code == ReplayThread::END_OF_FILE) {
			stop(true);
	} else if (return_code == ReplayThread::READ_ERROR) {
		stop(false);
		file_error();
	}
	
	progressbar.set_value(0);
}

PlaylistView::PlaylistView(
	NavigationView& nav
) : nav_ (nav)
{
	baseband::run_image(portapack::spi_flash::image_tag_replay);

	add_children({
		&button_open,
		&text_filename,
		&text_sample_rate,
		&text_duration,
		&progressbar,
		&field_frequency,
		&tx_view,			// this handles now the previous rfgain, rfamp
		&check_loop,
		&button_play,
		&waterfall,
	});
	
	field_frequency.set_value(target_frequency());
	field_frequency.set_step(receiver_model.frequency_step());
	field_frequency.on_change = [this](rf::Frequency f) {
		this->on_target_frequency_changed(f);
	};
	field_frequency.on_edit = [this, &nav]() {
		// TODO: Provide separate modal method/scheme?
		auto new_view = nav.push<FrequencyKeypadView>(this->target_frequency());
		new_view->on_changed = [this](rf::Frequency f) {
			this->on_target_frequency_changed(f);
			this->field_frequency.set_value(f);
		};
	};

	field_frequency.set_step(5000);
	
	button_play.on_select = [this](ImageButton&) {
		this->toggle();
	};
	
	button_open.on_select = [this, &nav](Button&) {
		auto open_view = nav.push<FileLoadView>(".TXT");
		open_view->on_changed = [this](std::filesystem::path new_file_path) {
			load_file(new_file_path);
		};
	};
}

PlaylistView::~PlaylistView() {
	radio::disable();
	baseband::shutdown();
}

void PlaylistView::on_hide() {
	stop(false);
	// TODO: Terrible kludge because widget system doesn't notify Waterfall that
	// it's being shown or hidden.
	waterfall.on_hide();
	View::on_hide();
}

void PlaylistView::set_parent_rect(const Rect new_parent_rect) {
	View::set_parent_rect(new_parent_rect);

	const ui::Rect waterfall_rect { 0, header_height, new_parent_rect.width(), new_parent_rect.height() - header_height };
	waterfall.set_parent_rect(waterfall_rect);
}

void PlaylistView::on_target_frequency_changed(rf::Frequency f) {
	set_target_frequency(f);
}

void PlaylistView::set_target_frequency(const rf::Frequency new_value) {
	persistent_memory::set_tuned_frequency(new_value);;
}

rf::Frequency PlaylistView::target_frequency() const {
	return persistent_memory::tuned_frequency();
}

} /* namespace ui */