#!/usr/bin/env bash

ywindow_of () {
    max=0
    min=-5
    while read line
#    for line in $(cat $1)
    do
        read xval yval xerr yerr <<< $line
        echo $xval $yval
        if (bc <<< "$yval > $max"); then max=$yval; fi
        if (bc <<< "$yval < $min"); then min=$yval; fi
#    done
    done < $1
    echo $(bc <<< "$min - 0.5") $(bc <<< "$max + 0.5")
}

mkdir -p analyses/tables
mkdir -p analyses/plots


for analysis in analyses/*
do
    # Grab and determine labels of analyses, skip if over the same band.
    ref_band=$(basename $analysis|sed 's@[^≻]*_≻_\([^≻_]*\)_[^_]*_[^_]*@\1@')
    echo_band=$(basename $analysis|sed 's@\([^≻]*\)_≻_[^≻_]*_[^_]*_[^_]*@\1@')
    if [[ $ref_band == $echo_band ]]; then continue; fi
    err_type=$(basename $analysis|sed 's@[^≻]*_≻_[^≻_]*_[^_]*_\(σ∊[CLM][MFC]\)@\1@')

    # Prepare files
    echo "Plotting PSD and time lags for $echo_band, referred to ${ref_band}."
    echoPSD_tabfile=analyses/tables/${echo_band}_${err_type}_PSD.tab
    refPSD_tabfile=analyses/tables/${ref_band}_${err_type}_PSD.tab
    timelag_tabfile=analyses/tables/${echo_band}_≻_${ref_band}_${err_type}_timelag.tab
    PSD_plotfile=analyses/plots/${echo_band}_≻_${ref_band}_${err_type}_PSD.png
    timelag_plotfile=analyses/plots/${echo_band}_≻_${ref_band}_${err_type}_timelag.png

    # Output curves to temporary files using perl script, move tables to
    # permanent location. This just assumes there are no conflicts.
    scripts/create_tables.pl $analysis > /dev/null
    mv tmp.echoPSD $echoPSD_tabfile
    mv tmp.refPSD $refPSD_tabfile
    mv tmp.timelag $timelag_tabfile


    # Plot PSD and save using gnuplot
#    read ymin ymax <<< $(ywindow_of $timelag_tabfile)
#    echo $ymin $ymax
    cat scripts/templates/psd_freq.gp|
        sed "s@%TITLE@Power Spectrum for Lightcurves $echo_band and $ref_band@"|
        sed "s@%SUBTITLE@as reported by Fausnaugh et. al, STORM III, 2016@"|
        sed "s@%FILE1@$refPSD_tabfile@"|
        sed "s@%LABEL1@${ref_band} PSD@"|
        sed "s@%FILE2@$echoPSD_tabfile@"|
        sed "s@%LABEL2@${echo_band} PSD@"|
        sed "s@%YMIN@$ymin@"|sed "s@%YMAX@$ymax@"|
        sed "s@%OUTPUTFILE@$PSD_plotfile@" > tmp.gp
    gnuplot tmp.gp

    # Plot time lags and save using gnuplot
#    read ymin ymax <<< $(ywindow_of $timelag_tabfile)
    cat scripts/templates/timelag_freq.gp|
        sed "s@%TITLE@Time Lag for Lightcurve $echo_band relative to $ref_band@"|
        sed "s@%SUBTITLE@as reported by Fausnaugh et. al, STORM III, 2016@"|
        sed "s@%FILE1@$timelag_tabfile@"|
        sed "s@%LABEL1@${echo_band} Lag@"|
        sed "s@%YMIN@$ymin@"|sed "s@%YMAX@$ymax@"|
        sed "s@%OUTPUTFILE@$timelag_plotfile@" > tmp.gp
    gnuplot tmp.gp
done

rm tmp.*