package main

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

	//"context"
	"fmt"

	"github.com/ggicci/httpin"
	"github.com/go-chi/chi/v5"
	"github.com/rs/zerolog/log"
)

const DEFAULT_RESULT_COUNT = 50

type GetTransactionPaginationInput struct {
	ResultCount int `in:"query=result_count"`
	PageNum     int `in:"query=page_num"`
}

func apiRouter() http.Handler {
	r := chi.NewRouter()
	//r.Use(ApiLoginRequired)
	r.With(
		httpin.NewInput(GetTransactionPaginationInput{}),
	).Get("/get_transactions", getTransactions)
	r.Post("/new_transaction", newTransaction)
	return r
}

func getTransactions(w http.ResponseWriter, req *http.Request) {

	input := req.Context().Value(httpin.Input).(*GetTransactionPaginationInput)

	if input.ResultCount == 0 {
		input.ResultCount = DEFAULT_RESULT_COUNT
	}

	transactions := []Transaction{}

	err := db_get_transactions(&transactions, input)

	if err != nil {

		log.Fatal().
			Err(err).
			Msg("Fatal error in getTransactions from db_get_transactions")
	}

	for _, trns := range transactions {
		//bytes, err := json.Marshal(trns)
		bytes, err := json.MarshalIndent(trns, "", "\t")
		if err != nil {
			log.Fatal().
				Err(err).
				Msg("Could not marshal json")
		}
		fmt.Fprintf(w, string(bytes))
	}
}

func newTransaction(w http.ResponseWriter, req *http.Request) {
	decoder := json.NewDecoder(req.Body)
	var t Transaction
	err := decoder.Decode(&t)
	if err != nil {
		log.Fatal().
			Err(err).
			Msg("Could not decode incoming post data")
	}
	//fmt.Fprintf(w, "New transaction created for Account: %d, with an Amount of: %s",
	//    t.Account, t.Amount)
	db_new_transaction(t)
}