package handler

import (
	"context"
	"encoding/json"
	"io/ioutil"
	"fmt"
	"net/http"

	"github.com/micro/micro/v3/service/logger"
	"github.com/micro/micro/v3/service/config"
	"github.com/micro/micro/v3/service/errors"
	pb "github.com/micro/services/weather/proto"
)

type Weather struct{
	Api string
	Key string
}

func New() *Weather {
        // TODO: look for "weather.provider" to determine the handler
        v, err := config.Get("weatherapi.api")
        if err != nil {
                logger.Fatalf("weatherapi.api config not found: %v", err)
        }
        api := v.String("")
        if len(api) == 0 {
                logger.Fatal("weatherapi.api config not found")
        }
        v, err = config.Get("weatherapi.key")
        if err != nil {
                logger.Fatalf("weatherapi.key config not found: %v", err)
        }
        key := v.String("")
        if len(key) == 0 {
                logger.Fatal("weatherapi.key config not found")
        }

        return &Weather{
                Api:   api,
                Key:   key,
        }
}

func (w *Weather) Now(ctx context.Context, req *pb.NowRequest, rsp *pb.NowResponse) error {
        if len(req.Location) <= 0 {
                return errors.BadRequest("weather.current", "invalid location")
        }

        uri := fmt.Sprintf("%scurrent.json?aqi=no&key=%s&q=%s", w.Api, w.Key, req.Location)

        resp, err := http.Get(uri)
        if err != nil {
                logger.Errorf("Failed to get current weather: %v\n", err)
                return errors.InternalServerError("weather.current", "failed to get current weather")
        }
        defer resp.Body.Close()

        b, _ := ioutil.ReadAll(resp.Body)

        if resp.StatusCode != 200 {
                logger.Errorf("Failed to get current weather (non 200): %d %v\n", resp.StatusCode, string(b))
                return errors.InternalServerError("weather.current", "failed to get current weather")
        }

        var respBody map[string]interface{}

        if err := json.Unmarshal(b, &respBody); err != nil {
                logger.Errorf("Failed to unmarshal current: %v\n", err)
                return errors.InternalServerError("weather.current", "failed to get current")
        }

	location := respBody["location"].(map[string]interface{})
	current := respBody["current"].(map[string]interface{})

	// set the location
	rsp.Location = location["name"].(string)
	rsp.Region = location["region"].(string)
	rsp.Country = location["region"].(string)
	rsp.Latitude = location["lat"].(float64)
	rsp.Longitude = location["lon"].(float64)
	rsp.Timezone = location["tz_id"].(string)
	rsp.LocalTime = location["localtime"].(string)

	// set the time of day
	if current["is_day"].(float64) == 1.0 {
		rsp.Daytime = true
	}

	rsp.TempC = current["temp_c"].(float64)
	rsp.TempF = current["temp_f"].(float64)
	rsp.FeelsLikeC = current["feelslike_c"].(float64)
	rsp.FeelsLikeF = current["feelslike_f"].(float64)
	rsp.Humidity = int32(current["humidity"].(float64))
	rsp.Cloud = int32(current["cloud"].(float64))
	rsp.Condition = current["condition"].(map[string]interface{})["text"].(string)
	rsp.IconUrl = current["condition"].(map[string]interface{})["icon"].(string)
	rsp.WindMph = current["wind_mph"].(float64)
	rsp.WindKph = current["wind_kph"].(float64)
	rsp.WindDirection = current["wind_dir"].(string)
	rsp.WindDegree = int32(current["wind_degree"].(float64))

	return nil
}