package api

import (
	"encoding/json"
	"fmt"
	"net/http"
	"regexp"
	"slices"
	"strings"
	"time"

	"github.com/maximotejeda/us_dop_api/domain"
	"github.com/maximotejeda/us_dop_api/helpers"
)

// handler to parse query to the api
func (api *API) GetInstitutionHistory(w http.ResponseWriter, r *http.Request) {
	var (
		timeSearch    time.Duration
		historyResult []*domain.History
	)

	err := r.ParseForm()
	if err != nil {
		api.log.Error("parsing form ", "error", err)
		http.Error(w, "parsing form", http.StatusNotFound)
	}
	queryP := r.Form
	timeAmount := queryP.Get("ta")  // numeric amount
	timeFrame := queryP.Get("tf")   // minute, hour, day, week, month, now ago until now
	resType := queryP.Get("format") // can be multiples html or a json

	inst := queryP.Get("name")
	resource := queryP.Get("res")
	inst = strings.ToLower(inst)
	// match time amount number
	re := regexp.MustCompile(`[0-9]{1,3}`)
	//	api.log.Info("parsing inst", "name", inst)
	if timeFrame != "now" {
		if !re.Match([]byte(timeAmount)) {
			api.log.Error("matching time", "error", "incorrect time amount")
			http.Error(w, "incorrect time amount", http.StatusNotFound)
			return
		}
	}

	timeSearch, err = helpers.ParseTimeAmount(timeFrame, timeAmount)
	if err != nil {
		api.log.Error("parsing time ", "error", err)
		http.Error(w, "incorrect time amount", http.StatusNotFound)
		return
	}

	if timeFrame == "now" {
		hist, err := api.dolar.GetLatest(inst)
		//hist, err := api.db.GetLastPrice(inst)
		if err != nil {
			api.log.Error("GetLastPrice", "time Frame", "now", "error", err)
			http.Error(w, "price not found", http.StatusNotFound)
			return
		}
		historyResult = append(historyResult, hist)
	} else {
		historyResult, err = api.dolar.GetSince(inst, int64(timeSearch.Minutes()))
		//historyResult, err = api.db.GetChangeSince(inst, timeSearch)
		if err != nil {
			api.log.Error("GetLastPrice", "time Frame", timeFrame, "amount", timeAmount, "error", err)
			http.Error(w, "price not found for time frame", http.StatusNotFound)
			return
		}
		api.log.Info("resultados", "=", historyResult)
	}
	searchRes := SearchResult{
		InstRequested: inst,
		Date:          time.Now(),
		TimeAmount:    timeAmount,
		TimeFrame:     timeFrame,
		Results:       historyResult,
	}

	// check if we want a json
	if resType == "html" {
		switch resource {
		case "card":
			err = api.templ.ExecuteTemplate(w, "card-history", searchRes)
		case "list":
			// by default we crate simple query
			// we need a way to distinguish from mixed or more complex query
			err = api.templ.ExecuteTemplate(w, "list-history", searchRes)
		case "table":
			// by default we crate simple query
			// we need a way to distinguish from mixed or more complex query
			err = api.templ.ExecuteTemplate(w, "table-history", searchRes)
		}
		if err != nil {
			api.log.Error("History", "error", err)
			http.Error(w, "history error", http.StatusNotFound)
		}
	} else {
		data, _ := json.Marshal(searchRes)
		w.Write(data)
	}

}

// GetBanks
// as bank will only return a list of names
// we can assume we need a list of some html to the app
func (api *API) GetInstNames(w http.ResponseWriter, r *http.Request) {
	queryP := r.URL.Query()
	fType := queryP.Get("format")
	resource := queryP.Get("res")
	inst := r.PathValue("inst")

	w.Header().Set("Etag", "institutions")
	w.Header().Set("Cache-Control", "max-age=3600")

	var institutions, err = []string{}, *new(error)
	switch inst {
	case "bancos", "banco":
		inst = "bancos"
		institutions, err = api.dolar.GetInstByType("bancos")
	case "caja", "cajas":
		inst = "cajas"
		institutions, err = api.dolar.GetInstByType("cajas")
	case "agente", "agentes":
		inst = "agentes"
		institutions, err = api.dolar.GetInstByType("agentes")
	case "all":
		bancos, _ := api.dolar.GetInstByType("bancos")
		cajas, _ := api.dolar.GetInstByType("cajas")
		agentes, _ := api.dolar.GetInstByType("agentes")
		inst = "all"
		institutions = slices.Concat(bancos, cajas, agentes)
	default:
		http.NotFound(w, r)
		return
	}
	if err != nil {
		api.log.Error("GetInstName", "error", err)
		http.Error(w, "", http.StatusNotFound)
	}
	searchResult := SearchResult{
		InstRequested: inst,
		Date:          time.Now(),
		TimeAmount:    "none",
		TimeFrame:     "none",
	}

	removeDup := map[string]int{}
	res := []string{}
	for _, val := range institutions {
		removeDup[val]++
		if removeDup[val] == 1 {
			res = append(res, val)
		}
	}

	for _, banco := range res {
		inst := domain.History{}
		inst.Institution.Name = banco
		searchResult.Results = append(searchResult.Results, &inst)
	}
	api.log.Info("institutions", "list", res)
	if fType == "html" {
		switch resource {
		case "card":
			err = api.templ.ExecuteTemplate(w, "card", searchResult)
		case "list":
			// by default we crate simple query
			// we need a way to distinguish from mixed or more complex query
			err = api.templ.ExecuteTemplate(w, "list", searchResult)
		}
		if err != nil {
			api.log.Error("rendering institucion", "tipo", inst, "error", err)
		}
	} else {
		dat, err := json.Marshal(searchResult)
		if err != nil {
			fmt.Println(err)
		}
		w.Write(dat)
	}

}

func (api *API) GetLatestPrice(w http.ResponseWriter, r *http.Request) {
	inst := r.PathValue("inst")
	if inst == "" {
		http.Error(w, "no inst in request", http.StatusNotFound)
	}
	price, err := api.dolar.GetLatest(inst)
	if err != nil {
		api.log.Error("geting latest price", "error", err)
		http.NotFound(w, r)
	}
	api.templ.ExecuteTemplate(w, "latest-price", price)
}

func (api *API) GetAllLatestPrice(w http.ResponseWriter, r *http.Request) {
	bancos, err := api.dolar.GetInstByType("bancos")
	if err != nil {
		api.log.Error("geting inst", "error", err)
		http.NotFound(w, r)
	}
	cajas, err := api.dolar.GetInstByType("cajas")
	if err != nil {
		api.log.Error("geting inst cajas", "error", err)
		http.NotFound(w, r)
	}
	agentes, err := api.dolar.GetInstByType("agentes")
	if err != nil {
		api.log.Error("geting inst agentes", "error", err)
		http.NotFound(w, r)
	}
	instLastPriceList := []*domain.History{}
	for _, inst := range slices.Concat(bancos, cajas, agentes) {
		in, err := api.dolar.GetLatest(inst)
		if err != nil {
			api.log.Error("geting last price", "error", err)
			continue
		}
		instLastPriceList = append(instLastPriceList, in)
	}
	api.templ.ExecuteTemplate(w, "latest-price", instLastPriceList)
}