#!/usr/bin/env bash

# Main function
# Encapsulated on its own function for readability purposes
#
# $1     command to run
# $2     file name of a draft to continue editing (optional)
declare global_config
do_main() {
    # make sure we're in the right directory
    if [ "$(pwd)" != "$HOME/public_html/blog" ]; then
        echo "You're not in your blog directory. Moving you there now"
        mkdir -p "$HOME/.tildelog"
        mkdir -p "$HOME/public_html/blog"
        cd "$HOME/public_html/blog" || exit 1
    fi
    # Detect if using BSD date or GNU date
    date_version_detect
    # Load default configuration, then override settings with the config file
    global_variables
    # shellcheck disable=SC1090 # variable config file
    [[ -f "$global_config" ]] && source "$global_config" &>/dev/null
    global_variables_check

    # Check for $EDITOR
    [[ -z $EDITOR ]] &&
        EDITOR=vim

    # Check for validity of argument
    [[ $1 != "reset" && $1 != "post" && $1 != "rebuild" && $1 != "list" && $1 != "edit" && $1 != "delete" && $1 != "tags" ]] &&
        usage && return

    [[ $1 == list ]] &&
        list_posts && return

    [[ $1 == tags ]] &&
        list_tags "$@" && return

    if [[ $1 == edit ]]; then
        if (($# < 2)) || [[ ! -f ${!#} ]]; then
            echo "Please enter a valid .md file to edit"
            exit
        fi
    fi

    # Test for existing html files
    if ls ./*.md &>/dev/null; then
        # We're going to back up just in case
        tar -c -z -f ".backup.tar.gz" -- *.html &&
            chmod 600 ".backup.tar.gz"
    elif [[ $1 == rebuild ]]; then
        echo "Can't find any html files, nothing to rebuild"
        return
    fi

    # Keep first backup of this day containing yesterday's version of the blog
    [[ ! -f .yesterday.tar.gz || $(date -r .yesterday.tar.gz +'%d') != "$(date +'%d')" ]] &&
        cp .backup.tar.gz .yesterday.tar.gz &>/dev/null

    [[ $1 == reset ]] &&
        reset && return

    create_css
    create_includes
    [[ $1 == post ]] && write_entry "$@"
    [[ $1 == rebuild ]] && rebuild_all_entries && rebuild_tags
    [[ $1 == delete ]] && rm "$2" &>/dev/null && rebuild_tags
    if [[ $1 == edit ]]; then
        if [[ $2 == -n ]]; then
            edit "$3"
        elif [[ $2 == -f ]]; then
            edit "$3" full
        else
            edit "$2" keep
        fi
    fi
    rebuild_index
    all_posts
    all_tags
    make_rss
    echo 'making gophermap'
    make_gophermap
    echo 'making geminicapsule'
    make_gemini
    echo 'deleting includes'
    delete_includes
}