#!/usr/bin/env bash

set -Eeo pipefail

#############
#  Globals  #
#############
CMD="/usr/bin/ani-cli"
CFG_DIR="${XDG_CONFIG_HOME:-$HOME/.config}/aniwrapper"
CFG_FILE="$CFG_DIR/themes/aniwrapper.rasi"
DEFAULT_DOWNLOAD="$HOME/Videos/sauce"
ROFI_THEME="aniwrapper.rasi"
THEMES="alter|aniwrapper|dracula|doomone|fancy|material|monokai|nord|nord2|onedark"
QUALITIES="1. best|2. 1080p|3. 720p|4. 480p|5. 360p|6. worst"
SUPPORTED_PLAYERS="mpv|vlc"
QUALITY=best
PLAYER_FN=mpv
DPI=96
IS_AUTOPLAY=0
GET_QUALITY=0
IS_CUSTOM_THEME=0
IS_DOWNLOAD=0
IS_PLAY_FROM_FILE=0
IS_ROFI=1
IS_SYNC=0
IS_ALTERNATE_PLAYER=0
VERBOSE=0
SILENT=0

quit="8. Quit"
options="1. Stream|2. Download|3. Continue|4. Recently Updated|5. Play from File|6. Sync History|7. Choose Theme|$quit"
theme=default

help_text() {
	while IFS= read -r line; do
		printf "%s\n" "$line"
	done <<< "
Usage:
	aniwrapper [-adhpqSv] [-t <theme> | -T <config_path>] [<query>]
	aniwrapper -f <directory_path> [-t <theme> | -T <config_path>] [-pSv] [<query>]\
	aniwrapper -c [-dhpqSv] [<query>]
	aniwrapper -Q <query>
	aniwrapper -C
Options:
    -a  enable autoplay
	-c  enable command-line mode (rofi disabled)
	-C  connect to history database
	-d  download episode in command-line mode
	-f  <path_to_directory> (no trailing slash) specify starting directory for play for file mode
	-h  show this help text
	-p  enable player selection menu
	-q  enable quality selection
	-Q  <query> query the history database
    -r  start script in episode selection using the most recently watched anime
	-v  verbose output
	-S  silent mode (suppress output to stdout) [cannot be used with -v]
	-t  <alter|aniwrapper (default)|dracula|doomone|fancy|material|monokai|nord|nord2|onedark> change rofi theme
	-T  <config_path> specify custom rofi theme
	"
}

lg() {
	if ((VERBOSE)); then
		inf "$*"
	fi
}

# display an informational message (first argument in green, second in magenta)
inf() {
	printf "\033[1;32m%s \033[1;35m%s\033[0m\n" "$1" "$2"
}

# prompts the user with message in $1-2 ($1 in blue, $2 in magenta) and saves the input to the variables in $REPLY and $REPLY2
prompt() {
	printf "\033[1;34m%s\033[1;35m%s\033[1;34m: \033[0m" "$1" "$2"
}

die() {
	printf "%s\n" "$*"
	exit 1
}

quit() {
	((SILENT != 1)) && lg 'Quitting...'
	exit 0
}

run() {
	if ((!IS_PLAY_FROM_FILE && !IS_SYNC && GET_QUALITY)); then
		get_quality
	fi
	if ((IS_CUSTOM_THEME)); then
		args+=(-T"$CFG_FILE")
	elif ((!IS_CUSTOM_THEME)); then
		args+=(-t"$theme")
	fi
	$CMD "${args[@]}" -D"$DPI" "$@"
}

get_quality() {
	if ((IS_ROFI)); then
		selection=$(rofi -dpi "$DPI" -dmenu -config "$CFG_FILE" \
			-l 6 -selected-row 0 -a 0 -window-title 'aniwrapper' \
			-theme-str 'listview {columns: 1;} window {width: 25%;}' \
			-p "Choose video quality:" \
			-sep '|' -no-custom <<< "$QUALITIES")
		QUALITY=$(awk '{print $2}' <<< "$selection")
	else
		qualities="best|1080p|720p|480p|360p|worst"
		prompt "Choose quality " "[$qualities]"
		read -r QUALITY
		while [[ ! "$QUALITY" =~ ($qualities) ]]; do
			lg "$QUALITY not a valid quality -> [$qualities]"
			prompt "Choose quality " "[$qualities]"
			read -r QUALITY
		done
	fi
	lg "selected quality: $QUALITY"
}

# return the index in $THEMES of $ROFI_THEME
get_theme_idx() {
	themeslist="aniwrapper-alter.rasi|aniwrapper.rasi|aniwrapper-dracula.rasi|aniwrapper-doomone.rasi|aniwrapper-fancy.rasi|aniwrapper-material.rasi|aniwrapper-monokai.rasi|aniwrapper-nord.rasi|aniwrapper-nord2.rasi|aniwrapper-onedark.rasi"
	idx=0
	while IFS='|' read -ra themes; do
		for t in "${themes[@]}"; do
			if [[ "$t" == "$ROFI_THEME" ]]; then
				lg "theme -> $t | theme index -> $idx" > /dev/stderr
				printf "%s\n" "$idx"
				break
			fi
			((++idx))
		done
	done <<< "$themeslist"
}

# generates a span mesg for rofi given
# input: message: str
generate_span() {
	msg="$*"
	span="<span foreground='#ecbe7b' style='italic' size='small'>$msg</span>"
	printf "%s\n" "$span"
}

set_theme() {
	new_theme="$1"
	case "$new_theme" in
		aniwrapper)
			ROFI_THEME=aniwrapper.rasi
			;;
		*)
			ROFI_THEME="aniwrapper-$new_theme.rasi"
			;;
	esac
	lg "Chosen theme -> $ROFI_THEME"
	CFG_FILE="$CFG_DIR/themes/$ROFI_THEME"
}

parse_args() {
	while getopts 'acCdD:f:hpqQ:rSt:T:v' OPT; do
		case "$OPT" in
			a)
				IS_AUTOPLAY=1
				;;
			c)
				IS_ROFI=0
				lg "Command-line (ani-cli) mode set"
				;;
			C)
				lg "Connecting to history database -> $CFG_DIR/history.sqlite3"
				sqlite3 "$CFG_DIR/history.sqlite3"
				exit $?
				;;
			d)
				IS_DOWNLOAD=1
				lg "Download flag set..."
				;;
			D)
				DPI="$OPTARG"
				;;
			f)
				IS_PLAY_FROM_FILE=1
				play_path="$OPTARG"
				lg "Play from file flag set... skipping main menu"
				lg "PLAY_PATH: $play_path"
				;;
			h)
				help_text
				exit 0
				;;
			p)
				IS_ALTERNATE_PLAYER=1
				;;
			q)
				GET_QUALITY=1
				lg "Quality prompt enabled"
				;;
			Q)
				query="$OPTARG"
				lg "DATABASE QUERY: $query"
				sqlite3 -line "$CFG_DIR/history.sqlite3" "$query"
				exit $?
				;;
			r)
				IS_RESUME=1
				lg "Selecting previously watched anime"
				;;
			S)
				SILENT=1
				;;
			t)
				theme="$OPTARG"
				set_theme "$theme"
				;;
			T)
				CFG_FILE="$OPTARG"
				[ ! -f "$CFG_FILE" ] && die "config file $CFG_FILE does not exist"
				IS_CUSTOM_THEME=1
				;;
			v)
				VERBOSE=1
				;;
			*)
				help_text
				exit 1
				;;
		esac
	done
}

get_player() {
	msg1="Choose from the supported players, or supply your own player command (full functionality not guaranteed)"
	msg2="if using an unsupported player, it must be able to play URLs for streaming from the internet"
	if ((IS_ROFI)); then
		PLAYER_FN=$(
			awk '{print $NF}' < <(rofi -dmenu -config "$CFG_FILE" -DPI "$DPI" \
				-l 4 -theme-str 'listview {columns: 1;} window {width: 40%;}' \
				-p "Enter video player:" -window-title 'aniwrapper' \
				-mesg "$(printf "%s\n%s\n" "$(generate_span "$msg1")" "$(generate_span "$msg2")")" \
				-a 0 -sep '|' <<< "$SUPPORTED_PLAYERS")
		)
	else
		printf "%s\n%s\n" "$msg1" "$msg2"
		printf "%s\n" "SUPPORTED PLAYERS:"
		while IFS='|' read -ra players; do
			printf "%s\n" "${players[@]}"
		done <<< "$SUPPORTED_PLAYERS"
		prompt "Enter player"
		read -r PLAYER_FN
	fi
	[ -z "$PLAYER_FN" ] && PLAYER_FN=mpv
	if ! command -v "$PLAYER_FN" > /dev/null; then
		die "ERROR: $PLAYER_FN does not exist"
	fi
}

# Check passed in flags and set cli arguments
check_flags() {
	if ((VERBOSE && SILENT)); then
		die "verbose and silent options cannot be used together"
	fi
	if ((IS_DOWNLOAD && IS_AUTOPLAY)); then
		die "autoplay and download options cannot be used together"
	fi
	if ((IS_DOWNLOAD && IS_PLAY_FROM_FILE)); then
		die "download and play from file options cannot be used together"
	fi
	if ((!IS_DOWNLOAD && IS_ALTERNATE_PLAYER)); then
		get_player
		lg "SELECTED PLAYER FN -> $PLAYER_FN"
	fi
	args=()
	if ((IS_AUTOPLAY)); then
		args+=(-a)
	fi
	if ((!IS_ROFI)); then
		args+=(-c)
		prompt "Enter download directory"
		read -r dl_dir
		lg "Download dir: $dl_dir"
		if [ ! -d "$dl_dir" ]; then
			mkdir -p "$dl_dir" || die "Error creating directory: $dl_dir"
		fi
		args+=(-d"$dl_dir")
	fi
	if ((IS_DOWNLOAD)); then
		args+=(-d "$DEFAULT_DOWNLOAD")
	fi
	if ((IS_PLAY_FROM_FILE)); then
		args+=(-f"$play_path")
	fi
	if ((IS_ALTERNATE_PLAYER)); then
		args+=(-p "$PLAYER_FN")
	fi
	if ((IS_RESUME)); then
		args+=(-r)
	fi
	if ((SILENT)); then
		args+=(-S)
	fi
	if ((IS_VERBOSE)); then
		args+=(-v)
	fi

	lg "ARGS: ${args[*]}"
	if ((IS_AUTOPLAY || IS_DOWNLOAD || !IS_ROFI || IS_RESUME || IS_PLAY_FROM_FILE)); then
		run "${args[@]}" "$@"
		exit $?
	fi
}

get_dl_dir() {
	dl_dir=$(
		rofi -dpi "$DPI" -dmenu -config "$CFG_FILE" \
			-theme-str 'listview {columns: 1;} window {width: 45%;}' \
			-mesg "$(generate_span "Enter the path to the download directory, or leave blank to go with the default: $HOME/Videos/sauce/")" \
			-l 1 -p "Enter download dir:" -window-title 'aniwrapper'
	)
	# if dl_dir is none set to current directory
	[ "$dl_dir" == "" ] && dl_dir="$DEFAULT_DOWNLOAD"
	if [ ! -d "$dl_dir" ]; then
		mkdir -p "$dl_dir" || die "Error creating directory: $dl_dir"
	fi
}

main() {
	((!SILENT)) && lg "CONFIG DIR: $CFG_DIR"
	((!SILENT)) && lg "ROFI CFG: $CFG_FILE"
	choice=$(echo "${options[@]}" | rofi -dpi "$DPI" -dmenu -no-custom -sep '|' \
		-theme-str 'listview {columns: 2;} window {width: 45%;}' \
		-config "$CFG_FILE" -l 4 -i -p "Aniwrapper" -window-title 'aniwrapper')

	[ "$choice" == "$quit" ] && quit

	selection=$(printf "%s\n" "$choice" | awk '{ print $1 }')

	case "$selection" in
		1.)
			lg "Streaming mode"
			run
			;;
		2.)
			lg "Download anime"
			get_dl_dir && run -d "$dl_dir"
			;;
		3.)
			lg "Continue watching"
			run -H
			;;
		4.)
			lg "Showing recently updated anime"
			run -R
			;;
		5.)
			lg "Play from file selected"
			IS_PLAY_FROM_FILE=1
			span=$(printf '%s\n%s\n' "$(generate_span "Provide a path to a valid directory, or choose from the list below")" "$(generate_span "The program will begin searching for media files from the supplied directory")")
			play_dir=$(
				rofi -dpi "$DPI" -dmenu -config "$CFG_FILE" \
					-i -l 12 -mesg "$span" -p "Enter path to starting directory:" \
					-async-pre-read 24 -matching 'fuzzy' -window-title 'aniwrapper' \
					-sort -sorting-method fzf \
					< <(sqlite3 -noheader -list "$CFG_DIR/history.sqlite3" <<< "SELECT directory FROM file_history WHERE filename = 'DIRECTORY' ORDER BY WATCH_DATE DESC;")
			)
			# trim trailing whitespace
			play_dir="${play_dir%% }"
			lg "Play dir: $play_dir"
			if [ -z "$play_dir" ]; then
				mkdir -p "$DEFAULT_DOWNLOAD" || die "error creating default download directory"
				run -f"$DEFAULT_DOWNLOAD"
			else
				run -f"$play_dir"
			fi
			exit $?
			;;
		6.)
			lg "Sync history database"
			IS_SYNC=1
			roficmd="rofi -dpi $DPI -dmenu -config $CFG_FILE -l 0 -p"
			username=$($roficmd "Enter the username of the remote user:" -theme-str 'window {width: 45%;}')
			[ -z "$username" ] && die "No username provided... exiting"
			host=$($roficmd "Enter the host for the remote machine (eg 192.168.1.99):" -theme-str 'window {width: 45%;}')
			[ -z "$host" ] && die "No host provided... exiting"
			port=$($roficmd "Enter in the ssh port for remote machine or leave blank for default [22]:" -theme-str 'window {width: 45%;}')
			[ -z "$port" ] && port=22
			keypath=$($roficmd "Enter path to private key (leave blank if not needed or if unsure):" -theme-str 'window {width: 45%;}')
			if ! printf "%s\n%s\n%d\n%s\n" "$username" "$host" "$port" "$keypath" | run -s; then
				lg "Aniwrapper was unable to sync the databases..."
				exit 1
			else
				lg "Databases synced successfully"
				quit
			fi
			;;
		7.)
			[ -z "$THEMES" ] && die "No themes provided... exiting"
			theme_idx="$(get_theme_idx)"
			lg "Theme index: $theme_idx"
			lg "NUM THEMES: $NUM_THEMES"
			choice=$(rofi -dmenu -config "$CFG_FILE" -dpi "$DPI" -window-title 'aniwrapper' \
				-theme-str 'listview {columns: 2;} window {width: 45%;}' \
				-no-custom -l 5 -i -p "Choose theme: " -sep '|' \
				-a "$theme_idx" -selected-row "$theme_idx" <<< "$THEMES")
			theme=$(awk '{ print $1 }' <<< "$choice")
			set_theme "$theme"
			main
			;;
		8.)
			quit
			;;
		*)
			help_text
			;;
	esac
}

parse_args "$@"
shift $((OPTIND - 1))
if [ $# -gt 0 ]; then
	check_flags "$*"
	if ((!IS_DOWNLOAD)); then
		run "$*"
	elif ((IS_DOWNLOAD)); then
		get_dl_dir && run -d "$dl_dir" "$*"
	fi
else
	check_flags
	main
fi