#!/bin/bash

# SEPARATOR
# ==============================================================================
# This script takes the lm1-exhibition-all.csv and lm2-exhibition-all.csv files
# and splits the readings down into daily and hourly segments. The breakdowns
# are placed in their own directories and should look like the following:

# data
# ├── light-meter-1
# |   │   ├── hourly readings directory (E.G. 2021-07-14/)
# |   │   |   └──hourly reading files   (E.G. 2021-07-14--14.csv)
# |   │   └── hourly readings directory (E.G. 2021-07-15/)
# |   │       └── hourly reading files  (E.G. 2021-07-15--17.csv)
# │   └── daily readings files (E.G 2021-07-14.csv)
# │   └── daily readings files (E.G 2021-07-15.csv)
# ├── light-meter-2
# |       └── repeats light-meter-1 structure...
# ├── lm1-exhibiton-all.csv
# └── lm2-exhibiton-all.csv
# 
# 2 directories, 2 files (I've shorted the list for brevity)

# Note: Naming Format for Hourly Breakdowns (YYYY-MM-DD--HH)
# ==============================================================================
# The last part of the file name specifies the hour the readings were taken
# from. So, '2021-07-15--17.csv' means the readings for that file were taken on
# the 15th July 2021 between 17:00 and 18:00 (5pm and 6pm).

hourBreakdown () {
    d="$1";   # Day
    m="$2";   # Month
    mtr="$3"; # Light Meter (either 1 or 2)
    mkdir -p "data/light-meter-$mtr/2021-$m-$d";
    for hour in {0..24}; do
        if [[ $hour -lt 10 ]]; then
            echo "time,reading" \
                 > "data/light-meter-$mtr/2021-$m-$d/2021-$m-$d--0$hour.csv";
            rg "2021-$m-$d 0$hour:" "data/light-meter-$mtr/2021-$m-$d.csv" \
               >> "data/light-meter-$mtr/2021-$m-$d/2021-$m-$d--0$hour.csv";
        else
            echo "time,reading" \
                 > "data/light-meter-$mtr/2021-$m-$d/2021-$m-$d--$hour.csv";
            rg "2021-$m-$d $hour:" "data/light-meter-$mtr/2021-$m-$d.csv" \
               >> "data/light-meter-$mtr/2021-$m-$d/2021-$m-$d--$hour.csv";
        fi
    done
}

dailyBreakdown () {
    lm=$1; # Light Meter (either 1 or 2)
    mkdir -p "data/light-meter-$lm";
    for month in {6..7} ; do
        for day in {1..31} ; do
            # June is 30 days long, hence the check (and skip).
            if [[ $day != 31 ]] && [[ $month != "06" ]]; then
                if [[ $day -lt 10 ]]; then
                    touch "data/light-meter-$lm/2021-0$month-0$day.csv";
                    echo "time,reading" \
                         > "data/light-meter-$lm/2021-0$month-0$day.csv";
                    rg "2021-0$month-0$day" "data/lm$lm-exhibiton-all.csv"  \
                       >> "data/light-meter-$lm/2021-0$month-0$day.csv";
                    if [[ $month -lt 10 ]]; then
                        hourBreakdown "0$day" "0$month" $lm;
                    else
                        hourBreakdown "0$day" $month $lm;
                    fi
                else
                    touch "data/light-meter-$lm/2021-0$month-$day.csv";
                    echo "time,reading" \
                         > "data/light-meter-$lm/2021-0$month-$day.csv";
                    rg "2021-0$month-$day" "data/lm$lm-exhibiton-all.csv" \
                       >> "data/light-meter-$lm/2021-0$month-$day.csv";
                    if [[ $month -lt 10 ]]; then
                        hourBreakdown $day "0$month" $lm;
                    else
                        hourBreakdown $day $month $lm;
                    fi
                fi
            fi
        done
    done
}

removeExcessData () {
    for day in {1..12}; do
    if [[ $day -lt 10 ]]; then d="0$day"; else d=$day; fi
    rm -r "data/light-meter-1/2021-06-$d"
    rm "data/light-meter-1/2021-06-$d.csv"
    rm -r "data/light-meter-2/2021-06-$d"
    rm "data/light-meter-2/2021-06-$d.csv"
done
}

dailyBreakdown "1"; # Light Meter 1
dailyBreakdown "2"; # Light Meter 2
removeExcessData;
mkdir output # For storing charts and stuff later (with Python scripts).