#!/bin/bash
#shellcheck disable=SC1090

. "$(sfpath)" || exit 3

shellfu import pretty
shellfu import jat

usage() {
    mkusage "$@" "[options] YLOG" \
        -- \
            "Export logfile YLOG to a concise report.  Format and target"    \
            "paths can be specified using -d, -n and -f.  Note that one log" \
            "may contain multiple sessions; each will be saved to separate"  \
            "file."                                                          \
        -o                                                                   \
            "-d EDIR    Save exported files to EDIR (make it if it does not" \
            "           exist).  Default is current directory."              \
            "-f EFMT    Export in format EFMT.  Default is 'html'."          \
            "           exist).  Default is current directory."              \
            "-n NAME    Set template for exported files to NAME.  NAME must" \
            "           contain '%s', which will be replaced with session"   \
            "           id.  Default name is jat_report%s.html"
}

render_with_jinja() {
    #
    # Render template $1 with Jinja2
    #
    debug -v ExpDir ExpName ExpFmt YLog TFile
    {
        echo 'import sys'
        echo 'from jinja2 import Template'
        echo 'import jat'
        echo ''
        echo "epath = '$ExpDir/$ExpName.$ExpFmt'"
        echo "ypath = '$YLog'"
        echo "tpath = '$TFile'"
        echo ''
        echo 'sessions = jat.load(ypath)'
        echo ''
        echo 'with open(tpath) as tf:'
        echo '    t = Template(tf.read())'
        echo ''
        echo 'for session in sessions:'
        echo '    with open(epath % session.sessid, "w") as ef:'
        echo '        ef.write(t.render('
        echo '            session=session'
        echo '        ))'
    } | PYTHONPATH="__JATTOOL_PYTHONPATH__" python2
}

cmd_export() {
    #
    # Export to HTML
    #
    local TFile
    mkdir -p "$ExpDir" || {
        warn "cannot create export directory: $ExpDir"
        return 3
    }
    case $ExpName in
        *%s*)   : ;;
        *)      warn "NAME does not contain %s, adding suffix -%s"
                ExpName+=-%s ;;
    esac
    TFile="__JATTOOL_TEMPLATES__/$ExpFmt.j2"
    test -f "$TFile" || {
        warn "unsupported format: $ExpFmt"
        return 3
    }
    render_with_jinja
}

main() {
    local YLog
    local ExpName=jat_report-%s
    local ExpDir=.
    local ExpFmt=html
    while true; do case $1 in
        -d) ExpDir=$2; shift 2 || usage -w "missing EDIR" ;;
        -f) ExpFmt=$2; shift 2 || usage -w "missing EFMT" ;;
        -n) ExpName=$2; shift 2 || usage -w "missing NAME" ;;
        -*) usage ;;
        *)  break ;;
    esac done
    YLog=$1; shift
    test -n "$YLog"  || usage -w "no YLOG specified"
    test -f "$YLog"  || usage -w "no such file: $YLog"
    debug -v Ylog ExpName ExpDir ExpFmt
    cmd_export
}

main "$@"