/*
 * Copyright (c) 2018 Arnaud Ysmal.  All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

package themes

import (
	"fmt"
	"io"
	"jsonresume/model"
	"strings"
	"text/template"
	"time"
)

type LangString struct {
	TitlePrefix    string
	About          string
	Contact        string
	WorkExperience string
	Awards         string
	Volunteer      string
	Education      string
	Skills         string
	Publications   string
	Languages      string
	Interests      string
	References     string
	Projects       string
	In             string
	At             string
}

type Theme struct {
	Name      string
	Directory string
	Functions template.FuncMap
	Template  string
}

var Themes map[string]*Theme
var Langs = map[string]LangString{
	"en": LangString{
		TitlePrefix:    "Resume of",
		About:          "About",
		Contact:        "Contact",
		WorkExperience: "Work Experience",
		Awards:         "Awards",
		Volunteer:      "Volunteer",
		Education:      "Education",
		Skills:         "Skills",
		Publications:   "Publications",
		Languages:      "Languages",
		Interests:      "Interests",
		References:     "References",
		Projects:       "Projects",
		In:             "in",
		At:             "at",
	},
}
var CommonFuncs = map[string]template.FuncMap{
	"en": template.FuncMap{
		"iconClass":          iconClass,
		"formatDateY":        formatDateY,
		"formatDateMY":       formatDateMY,
		"formatDateDMY":      formatDateDMY,
		"formatDateShortMY":  formatDateShortMY,
		"formatDateDShortMY": formatDateDShortMY,
	},
}

func init() {
	Themes = make(map[string]*Theme)
	setupFrenchTranslation()
}

type TemplateData struct {
	*model.Resume
	Lang LangString
}

func (t *Theme) Render(r *model.Resume, w io.Writer) error {
	if r.Language == "" {
		r.Language = "en"
	}
	l, exists := Langs[r.Language]
	if !exists {
		return fmt.Errorf("Unsupported language %s", r.Language)
	}
	f, _ := CommonFuncs[r.Language]
	tmpl := template.Must(template.New(t.Name).Funcs(f).Funcs(t.Functions).Parse(t.Template))
	return tmpl.Execute(w, &TemplateData{r, l})
}

func (t *Theme) Register() error {
	if _, exists := Themes[t.Name]; exists {
		return fmt.Errorf("Package %s already registered", t.Name)
	}
	Themes[t.Name] = t
	return nil
}

func iconClass(network string) string {
	network = strings.ToLower(network)
	switch network {
	case "google-plus":
	case "googleplus":
		return "fab fa-google-plus"
	case "flickr":
	case "flicker":
		return "fab fa-flickr"
	case "dribbble":
	case "dribble":
		return "fab fa-dribbble"
	case "codepen":
		return "fab fa-codepen"
	case "soundcloud":
		return "fab fa-soundcloud"
	case "reddit":
		return "fab fa-reddit"
	case "tumblr":
	case "tumbler":
		return "fab fa-tumblr"
	case "stack-overflow":
	case "stackoverflow":
		return "fab fa-stack-overflow"
	case "blog":
	case "rss":
		return "fas fa-rss"
	case "gitlab":
		return "fab fa-gitlab"
	case "keybase":
		return "fas fa-key"
	case "gitea":
		return "fab fa-git"
	default:
		return "fab fa-" + network
	}

	return "fa fa-" + network
}

func formatDateY(date model.ResumeDate) string {
	if date.IsZero() {
		return "Present"
	}
	return fmt.Sprintf("%d", date.Year())
}

func formatDateMY(date model.ResumeDate) string {
	if date.IsZero() {
		return "Present"
	}
	return fmt.Sprintf("%s %d", date.Month().String(), date.Year())
}

func formatDateDMY(date model.ResumeDate) string {
	if date.IsZero() {
		return "Present"
	}
	return fmt.Sprintf("%d %s %d", date.Day(), date.Month().String(), date.Year())
}

func formatDateShortMY(date model.ResumeDate) string {
	if date.IsZero() {
		return "Present"
	}
	return fmt.Sprintf("%s %d", date.Format("Jan"), date.Year())
}

func formatDateDShortMY(date model.ResumeDate) string {
	if date.IsZero() {
		return "Present"
	}
	return fmt.Sprintf("%d %s %d", date.Day(), date.Format("Jan"), date.Year())
}

func setupFrenchTranslation() {
	Langs["fr"] = LangString{
		TitlePrefix:    "CV de",
		About:          "À propos",
		Contact:        "Coordonnées",
		WorkExperience: "Expérience Professionnelle",
		Awards:         "Récompenses",
		Volunteer:      "Bénévolat",
		Education:      "Formation",
		Skills:         "Compétences",
		Publications:   "Publications",
		Languages:      "Langues",
		Interests:      "Intérêts",
		References:     "Références",
		Projects:       "Projets",
		In:             "en",
		At:             "à",
	}
	CommonFuncs["fr"] = template.FuncMap{
		"iconClass":          iconClass,
		"formatDateY":        formatDateYFR,
		"formatDateMY":       formatDateMYFR,
		"formatDateDMY":      formatDateDMYFR,
		"formatDateShortMY":  formatDateShortMYFR,
		"formatDateDShortMY": formatDateDShortMYFR,
	}
}

func getMonthFRShort(date model.ResumeDate) string {
	switch date.Month() {
	case time.January:
		return "Janv."
	case time.February:
		return "Fév."
	case time.March:
		return "Mars"
	case time.April:
		return "Avril"
	case time.May:
		return "Mai"
	case time.June:
		return "Juin"
	case time.July:
		return "Juil."
	case time.August:
		return "Août"
	case time.September:
		return "Sept."
	case time.October:
		return "Oct."
	case time.November:
		return "Nov."
	case time.December:
		return "Déc."
	}
	return ""
}

func getMonthFR(date model.ResumeDate) string {
	switch date.Month() {
	case time.January:
		return "Janvier"
	case time.February:
		return "Février"
	case time.March:
		return "Mars"
	case time.April:
		return "Avril"
	case time.May:
		return "Mai"
	case time.June:
		return "Juin"
	case time.July:
		return "Juillet"
	case time.August:
		return "Août"
	case time.September:
		return "Septembre"
	case time.October:
		return "Octobre"
	case time.November:
		return "Novembre"
	case time.December:
		return "Décembre"
	}
	return ""
}

func formatDateYFR(date model.ResumeDate) string {
	if date.IsZero() {
		return "Présent"
	}
	return fmt.Sprintf("%d", date.Year())
}

func formatDateMYFR(date model.ResumeDate) string {
	if date.IsZero() {
		return "Présent"
	}
	return fmt.Sprintf("%s %d", getMonthFR(date), date.Year())
}

func formatDateDMYFR(date model.ResumeDate) string {
	if date.IsZero() {
		return "Présent"
	}
	return fmt.Sprintf("%d %s %d", date.Day(), getMonthFR(date), date.Year())
}

func formatDateShortMYFR(date model.ResumeDate) string {
	if date.IsZero() {
		return "Présent"
	}
	return fmt.Sprintf("%s %d", getMonthFRShort(date), date.Year())
}

func formatDateDShortMYFR(date model.ResumeDate) string {
	if date.IsZero() {
		return "Présent"
	}
	return fmt.Sprintf("%d %s %d", date.Day(), getMonthFRShort(date), date.Year())
}