package web

import (
	"net/http"
	"strconv"

	"inventree/internal/models"
)

type settingsPageData struct {
	User         *models.User
	Statuses     []models.Status
	SiteName     string
	AssetPrefix  string
	AssetPadding string
	Error        string
}

func (a *App) settingsData(r *http.Request) (settingsPageData, error) {
	ctx := r.Context()
	statusList, err := a.Statuses.List(ctx)
	if err != nil {
		return settingsPageData{}, err
	}
	siteName, err := a.Settings.Get(ctx, "site_name", "inventree")
	if err != nil {
		return settingsPageData{}, err
	}
	prefix, err := a.Settings.Get(ctx, "asset_id_prefix", "IT-")
	if err != nil {
		return settingsPageData{}, err
	}
	padding, err := a.Settings.Get(ctx, "asset_id_padding", "6")
	if err != nil {
		return settingsPageData{}, err
	}
	return settingsPageData{
		User: currentUser(r), Statuses: statusList, SiteName: siteName, AssetPrefix: prefix, AssetPadding: padding,
	}, nil
}

func (a *App) handleSettingsPage(w http.ResponseWriter, r *http.Request) {
	data, err := a.settingsData(r)
	if err != nil {
		writeErr(w, http.StatusInternalServerError, err.Error())
		return
	}
	a.Render(w, http.StatusOK, "settings", data)
}

func (a *App) handleSettingsGeneral(w http.ResponseWriter, r *http.Request) {
	if err := r.ParseForm(); err != nil {
		writeErr(w, http.StatusBadRequest, err.Error())
		return
	}
	ctx := r.Context()
	_ = a.Settings.Set(ctx, "site_name", r.FormValue("site_name"))
	_ = a.Settings.Set(ctx, "asset_id_prefix", r.FormValue("asset_id_prefix"))
	if _, err := strconv.Atoi(r.FormValue("asset_id_padding")); err == nil {
		_ = a.Settings.Set(ctx, "asset_id_padding", r.FormValue("asset_id_padding"))
	}
	http.Redirect(w, r, "/settings", http.StatusSeeOther)
}

func (a *App) handleStatusCreate(w http.ResponseWriter, r *http.Request) {
	if err := r.ParseForm(); err != nil {
		writeErr(w, http.StatusBadRequest, err.Error())
		return
	}
	st := &models.Status{Name: r.FormValue("name"), Color: r.FormValue("color")}
	if err := a.Statuses.Create(r.Context(), st); err != nil {
		a.Log.Warn("create status failed", "error", err)
	}
	http.Redirect(w, r, "/settings", http.StatusSeeOther)
}

func (a *App) handleStatusUpdate(w http.ResponseWriter, r *http.Request) {
	id, err := pathID(r, "id")
	if err != nil {
		writeErr(w, http.StatusBadRequest, err.Error())
		return
	}
	if err := r.ParseForm(); err != nil {
		writeErr(w, http.StatusBadRequest, err.Error())
		return
	}
	st, err := a.Statuses.Get(r.Context(), id)
	if err != nil {
		writeErr(w, http.StatusNotFound, err.Error())
		return
	}
	st.Name = r.FormValue("name")
	st.Color = r.FormValue("color")
	if err := a.Statuses.Update(r.Context(), st); err != nil {
		a.Log.Warn("update status failed", "error", err)
	}
	http.Redirect(w, r, "/settings", http.StatusSeeOther)
}

func (a *App) handleStatusDelete(w http.ResponseWriter, r *http.Request) {
	id, err := pathID(r, "id")
	if err != nil {
		writeErr(w, http.StatusBadRequest, err.Error())
		return
	}
	if err := a.Statuses.Delete(r.Context(), id); err != nil {
		a.Log.Warn("delete status failed", "error", err)
	}
	http.Redirect(w, r, "/settings", http.StatusSeeOther)
}

func (a *App) handleStatusReorder(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()
	id, err := pathID(r, "id")
	if err != nil {
		writeErr(w, http.StatusBadRequest, err.Error())
		return
	}
	if err := r.ParseForm(); err != nil {
		writeErr(w, http.StatusBadRequest, err.Error())
		return
	}
	dir := r.FormValue("dir")

	list, err := a.Statuses.List(ctx)
	if err != nil {
		writeErr(w, http.StatusInternalServerError, err.Error())
		return
	}
	idx := -1
	for i, st := range list {
		if st.ID == id {
			idx = i
			break
		}
	}
	if idx >= 0 {
		swapWith := -1
		if dir == "up" && idx > 0 {
			swapWith = idx - 1
		} else if dir == "down" && idx < len(list)-1 {
			swapWith = idx + 1
		}
		if swapWith >= 0 {
			ids := make([]int64, len(list))
			for i, st := range list {
				ids[i] = st.ID
			}
			ids[idx], ids[swapWith] = ids[swapWith], ids[idx]
			if err := a.Statuses.Reorder(ctx, ids); err != nil {
				a.Log.Warn("reorder statuses failed", "error", err)
			}
		}
	}
	http.Redirect(w, r, "/settings", http.StatusSeeOther)
}