package controller

import (
	"context"
	"encoding/json"
	"log/slog"
	"net/http"
	"strconv"

	"github.com/AFASystems/presence/internal/pkg/api/response"
	"github.com/AFASystems/presence/internal/pkg/model"
	"github.com/AFASystems/presence/internal/pkg/validation"
	"github.com/gorilla/mux"
	"gorm.io/gorm"
)

func ZoneAddController(db *gorm.DB, context context.Context) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		var zone model.Zone
		if err := json.NewDecoder(r.Body).Decode(&zone); err != nil {
			response.BadRequest(w, "invalid request body")
			return
		}
		if err := validation.Struct(&zone); err != nil {
			response.BadRequest(w, err.Error())
			return
		}
		if err := db.WithContext(context).Create(&zone).Error; err != nil {
			response.InternalError(w, "failed to create zone", err)
			return
		}

		response.JSON(w, http.StatusCreated, map[string]string{"status": "created"})
	}
}

func ZoneListController(db *gorm.DB, context context.Context) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		query := r.URL.Query()

		lStr := query.Get("limit")
		if lStr == "" {
			lStr = "100"
		}
		limit, err := strconv.Atoi(lStr)
		if err != nil {
			slog.Error("invalid limit parameter", "value", lStr)
			response.BadRequest(w, "invalid limit parameter")
			return
		}

		oStr := query.Get("offset")
		if oStr == "" {
			oStr = "0"
		}
		offset, err := strconv.Atoi(oStr)
		if err != nil {
			slog.Error("invalid offset parameter", "value", oStr)
			response.BadRequest(w, "invalid offset parameter")
			return
		}

		var zones []model.Zone
		if err := db.WithContext(context).Limit(limit).Offset(offset).Find(&zones).Error; err != nil {
			response.InternalError(w, "failed to list zones", err)
			return
		}
		response.JSON(w, http.StatusOK, zones)
	}
}

func ZoneUpdateController(db *gorm.DB, context context.Context) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		var zone model.Zone
		if err := json.NewDecoder(r.Body).Decode(&zone); err != nil {
			response.BadRequest(w, "invalid request body")
			return
		}
		if err := validation.Struct(&zone); err != nil {
			response.BadRequest(w, err.Error())
			return
		}

		id := zone.ID
		if err := db.WithContext(context).First(&model.Zone{}, "id = ?", id).Error; err != nil {
			response.NotFound(w, "zone not found")
			return
		}

		if err := db.WithContext(context).Save(&zone).Error; err != nil {
			response.InternalError(w, "failed to update zone", err)
			return
		}

		response.JSON(w, http.StatusOK, map[string]string{"status": "updated"})
	}
}

func ZoneDeleteController(db *gorm.DB, context context.Context) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		id := mux.Vars(r)["id"]
		res := db.WithContext(context).Delete(&model.Zone{}, "id = ?", id)
		if res.RowsAffected == 0 {
			response.NotFound(w, "zone not found")
			return
		}
		if res.Error != nil {
			response.InternalError(w, "failed to delete zone", res.Error)
			return
		}

		response.JSON(w, http.StatusOK, map[string]string{"status": "deleted"})
	}
}