package server

import (
	"encoding/json"
	"net/http"
	"time"

	"status/db"
)

func writeJSON(w http.ResponseWriter, a interface{}) {
	bytes, err := json.Marshal(a)
	if err != nil {
		http.Error(w, "500 Internal Server Error", http.StatusInternalServerError)
		return
	}
	w.Header().Set("Content-Type", "application/json")
	_, err = w.Write(bytes)
	if err != nil {
		http.Error(w, "500 Internal Server Error", http.StatusInternalServerError)
	}
}

func allStatus(w http.ResponseWriter, req *http.Request) {
	status := getStatus()
	writeJSON(w, status)
}

func dayHistory(w http.ResponseWriter, req *http.Request) {
	keys, ok := req.URL.Query()["service_name"]
	if !ok || len(keys) == 0 || len(keys[0]) < 1 {
		http.Error(w, "`service_name` not provided", http.StatusBadRequest)
		return
	}
	if len(keys) >= 2 {
		http.Error(w, "Only one `service_name` allowed", http.StatusBadRequest)
		return
	}
	entries := db.GetFromDB(keys[0], time.Now().Add(time.Duration(-24)*time.Hour), time.Now())
	writeJSON(w, entries)
}

func weekHistory(w http.ResponseWriter, req *http.Request) {
	keys, ok := req.URL.Query()["service_name"]
	if !ok || len(keys) == 0 || len(keys[0]) < 1 {
		http.Error(w, "`service_name` not provided", http.StatusBadRequest)
		return
	}
	if len(keys) >= 2 {
		http.Error(w, "Only one `service_name` allowed", http.StatusBadRequest)
		return
	}
	entries := getHistoryDay(keys[0], 7)
	writeJSON(w, entries)
}

func monthHistory(w http.ResponseWriter, req *http.Request) {
	keys, ok := req.URL.Query()["service_name"]
	if !ok || len(keys) == 0 || len(keys[0]) < 1 {
		http.Error(w, "`service_name` not provided", http.StatusBadRequest)
		return
	}
	if len(keys) >= 2 {
		http.Error(w, "Only one `service_name` allowed", http.StatusBadRequest)
		return
	}
	entries := getHistoryDay(keys[0], 31)
	writeJSON(w, entries)
}

func yearHistory(w http.ResponseWriter, req *http.Request) {
	keys, ok := req.URL.Query()["service_name"]
	if !ok || len(keys) == 0 || len(keys[0]) < 1 {
		http.Error(w, "`service_name` not provided", http.StatusBadRequest)
		return
	}
	if len(keys) >= 2 {
		http.Error(w, "Only one `service_name` allowed", http.StatusBadRequest)
		return
	}
	entries := getHistoryDay(keys[0], 366)
	writeJSON(w, entries)
}