package handlers

import (
	"net/http"
	"strings"
)

const resourceI18nColsSQL = `
	COALESCE(r.title_zh,''), COALESCE(r.title_en,''), COALESCE(r.title_ja,''),
	COALESCE(r.title_ko,''), COALESCE(r.title_vi,''), COALESCE(r.title_id,''), COALESCE(r.title_ms,''),
	COALESCE(r.description_zh,''), COALESCE(r.description_en,''), COALESCE(r.description_ja,''),
	COALESCE(r.description_ko,''), COALESCE(r.description_vi,''), COALESCE(r.description_id,''), COALESCE(r.description_ms,''),
	COALESCE(r.body_text_zh,''), COALESCE(r.body_text_en,''), COALESCE(r.body_text_ja,''),
	COALESCE(r.body_text_ko,''), COALESCE(r.body_text_vi,''), COALESCE(r.body_text_id,''), COALESCE(r.body_text_ms,'')`

type resourceTextI18n struct {
	TitleZh, TitleEn, TitleJa, TitleKo, TitleVi, TitleId, TitleMs string
	DescZh, DescEn, DescJa, DescKo, DescVi, DescId, DescMs       string
	BodyZh, BodyEn, BodyJa, BodyKo, BodyVi, BodyId, BodyMs       string
}

func pickLangField(r *http.Request, zh, en, ja, ko, vi, id, ms string) string {
	lang := strings.TrimSpace(r.URL.Query().Get("lang"))
	if lang == "" {
		lang = r.Header.Get("Accept-Language")
	}
	lang = strings.ToLower(strings.TrimSpace(strings.Split(lang, ",")[0]))
	switch {
	case strings.HasPrefix(lang, "zh"):
		if zh != "" {
			return zh
		}
	case strings.HasPrefix(lang, "en"):
		if en != "" {
			return en
		}
	case strings.HasPrefix(lang, "ja"):
		if ja != "" {
			return ja
		}
	case strings.HasPrefix(lang, "ko"):
		if ko != "" {
			return ko
		}
	case strings.HasPrefix(lang, "vi"):
		if vi != "" {
			return vi
		}
	case lang == "id", strings.HasPrefix(lang, "in"):
		if id != "" {
			return id
		}
	case strings.HasPrefix(lang, "ms"):
		if ms != "" {
			return ms
		}
	}
	if zh != "" {
		return zh
	}
	if en != "" {
		return en
	}
	if ja != "" {
		return ja
	}
	if ko != "" {
		return ko
	}
	if vi != "" {
		return vi
	}
	if id != "" {
		return id
	}
	return ms
}

func (t resourceTextI18n) pick(r *http.Request) (title, description, body string) {
	return pickLangField(r, t.TitleZh, t.TitleEn, t.TitleJa, t.TitleKo, t.TitleVi, t.TitleId, t.TitleMs),
		pickLangField(r, t.DescZh, t.DescEn, t.DescJa, t.DescKo, t.DescVi, t.DescId, t.DescMs),
		pickLangField(r, t.BodyZh, t.BodyEn, t.BodyJa, t.BodyKo, t.BodyVi, t.BodyId, t.BodyMs)
}

func scanResourceTextI18n(
	titleZh, titleEn, titleJa, titleKo, titleVi, titleId, titleMs string,
	descZh, descEn, descJa, descKo, descVi, descId, descMs string,
	bodyZh, bodyEn, bodyJa, bodyKo, bodyVi, bodyId, bodyMs string,
) resourceTextI18n {
	return resourceTextI18n{
		TitleZh: titleZh, TitleEn: titleEn, TitleJa: titleJa, TitleKo: titleKo, TitleVi: titleVi, TitleId: titleId, TitleMs: titleMs,
		DescZh: descZh, DescEn: descEn, DescJa: descJa, DescKo: descKo, DescVi: descVi, DescId: descId, DescMs: descMs,
		BodyZh: bodyZh, BodyEn: bodyEn, BodyJa: bodyJa, BodyKo: bodyKo, BodyVi: bodyVi, BodyId: bodyId, BodyMs: bodyMs,
	}
}