#!/bin/bash

scriptfolder=$(dirname "$0")
addwhat="$1"
name="$2"
camelcase=$(echo $name | sed -e 's/\b\(.\)/\u\1/g' -e 's/\(.*\)/\l\1/' -e 's/\s//g')
actiontype=$(echo $name | sed -e 's/\(.*\)/\U\1/' -e 's/\s/-/g')

help_message () {
    echo "possible actions:"
    echo "- component name"
    echo "- reducer name"
    echo "- action name-string [reducer-file] [prop1 prop2 ...]"
    echo "- epic name-string"
}

if [ -z "$name" ]
then
    help_message
    exit
fi

case "$addwhat" in

    reducer)
        if [ -d "reducers" ]
        then
            sed "s/example/$name/g" $scriptfolder/exampleReducer.js > reducers/$name.js
            sed -i "s/import { combineReducers } from 'redux';/import { combineReducers } from 'redux';\nimport $name from '.\/$name.js';/g" reducers/index.js
            sed -i "s/combineReducers({/combineReducers({\n    $name,/g" reducers/index.js
        else
            #TODO: add reducers folder and template reducers/index.js if not present (with user confirmation?)
            echo "need reducers folder (for now)"
        fi
        echo "added reducer $name to reducers/ and reducers/index.js"
        ;;



    action)
        if [ ! -e "actions.js" ]
        then
            echo "creating actions.js (don't forget to import in other files)"
        fi
        reducer="$3"
        props="${@:4}"
        actargs=$(echo $props | sed 's/\s\+/, /g')
        actcomments="// action.$(echo $props | sed 's/\s\+/\\n    \/\/ action./g')"

        objprops=""
        if [ ! -z "$props" ]
        then
            for p in $props
            do
                objprops="$objprops        $p,\n"
            done
        fi

        sed \
            -e "s/example/$camelcase/g" \
            -e "s/()/($actargs)/g" \
            -e "s/^    };/$objprops    };/g" \
            -e "s/EXAMPLE/$actiontype/g" \
            $scriptfolder/exampleAction.js >> actions.js

        #TODO: consider adding option to add to epic AND/OR reducer (check for ".js", check for basename, etc) (all following arguments are action parameters)
        if [ -e "$reducer" ]
        then
            sed -i \
                -e "s/default:/case '$actiontype':\n            return $camelcase(state, action);\n        default:/" \
                $reducer
            sed \
                -e "s/name/$camelcase/g" \
                -e "s_return_$actcomments\n    return_g" \
                $scriptfolder/exampleReducerAction.js \
                >> $reducer
        fi

        echo "added action '$actiontype' to [actions.js] and [$reducer]"
        ;;



    epic)
        echo "add epic"
        if [ -d "epics" ]
        then
            sed -e "s/example/$camelcase/g" -e "s/PING/$actiontype/g" $scriptfolder/exampleEpic.js > epics/$camelcase.js
            sed -i "s/import { combineEpics } from 'redux-observable';/import { combineEpics } from 'redux-observable';\nimport $camelcase from '.\/$camelcase.js';/g" epics/index.js
            sed -i "s/combineEpics(/combineEpics(\n    $camelcase,/g" epics/index.js
        else
            #TODO: add epics folder and template epics/index.js if not present (with user confirmation?)
            echo "need epics folder (for now)"
        fi
        echo "added epic $camelcase to epics/ and epics/index.js"
        ;;



    component)
        if [ -d "components" ]
        then
            sed "s/Example/$name/g" $scriptfolder/exampleComponent.js > components/$name.js
        else
            #TODO: add components folder if not present (with user confirmation?)
            echo "need components folder (for now)"
        fi
        echo "added component $name to components/"
        ;;



    *)
        help_message
        ;;
esac


# ADD REDUCER
# 1. add reducer template file to reducers/
# 2. import reducer in reducers/index.js
# 3. include name of reducer in combineReducers in reducers/index.js

# ADD ACTION AND INCLUDE IN REDUCER
# 1. append action creator function in actions.js
# 2. insert action case statement into designated reducer
# 3. append function in reducer file

# ADD EPIC
# 1. add epic template file to epics/
# 2. import epic in epics/index.js
# 3. include name of epic in combineEpics in epics/index.js

# ADD COMPONENT
# 1. add component template file to components/