package api

import (
	"net/http"
	"strconv"
	"strings"

	"forge.cadoles.com/Cadoles/emissary/internal/datastore"
	"github.com/go-chi/chi/v5"
	"github.com/pkg/errors"
	"gitlab.com/wpetit/goweb/api"
	"gitlab.com/wpetit/goweb/logger"
)

const (
	ErrCodeUnknownError     api.ErrorCode = "unknown-error"
	ErrCodeNotFound         api.ErrorCode = "not-found"
	ErrCodeInvalidSignature api.ErrorCode = "invalid-signature"
	ErrCodeConflict         api.ErrorCode = "conflict"
	ErrCodeMultipleResults  api.ErrorCode = "multiple-results"
	ErrCodeAlreadyClaimed   api.ErrorCode = "already-claimed"
)

func getAgentID(w http.ResponseWriter, r *http.Request) (datastore.AgentID, bool) {
	rawAgentID := chi.URLParam(r, "agentID")

	agentID, err := strconv.ParseInt(rawAgentID, 10, 64)
	if err != nil {
		logger.Error(r.Context(), "could not parse agent id", logger.CapturedE(errors.WithStack(err)))
		api.ErrorResponse(w, http.StatusBadRequest, api.ErrCodeMalformedRequest, nil)

		return 0, false
	}

	return datastore.AgentID(agentID), true
}

func getSpecDefinitionNameAndVersion(w http.ResponseWriter, r *http.Request) (string, string, bool) {
	specDefName := chi.URLParam(r, "specDefName")
	specDefVersion := chi.URLParam(r, "specDefVersion")

	return specDefName, specDefVersion, true
}

func getTenantID(w http.ResponseWriter, r *http.Request) (datastore.TenantID, bool) {
	rawTenantID := chi.URLParam(r, "tenantID")

	tenantID, err := datastore.ParseTenantID(rawTenantID)
	if err != nil {
		err = errors.WithStack(err)
		logger.Error(r.Context(), "could not parse tenant id", logger.CapturedE(err))

		api.ErrorResponse(w, http.StatusBadRequest, api.ErrCodeMalformedRequest, nil)

		return "", false
	}

	return tenantID, true
}

func getIntQueryParam(w http.ResponseWriter, r *http.Request, param string, defaultValue int64) (int64, bool) {
	rawValue := r.URL.Query().Get(param)
	if rawValue != "" {
		value, err := strconv.ParseInt(rawValue, 10, 64)
		if err != nil {
			err = errors.WithStack(err)
			logger.Error(r.Context(), "could not parse int param", logger.F("param", param), logger.CapturedE(err))
			api.ErrorResponse(w, http.StatusBadRequest, api.ErrCodeMalformedRequest, nil)

			return 0, false
		}

		return value, true
	}

	return defaultValue, true
}

func getStringSliceValues(w http.ResponseWriter, r *http.Request, param string, defaultValue []string) ([]string, bool) {
	rawValue := r.URL.Query().Get(param)
	if rawValue != "" {
		values := strings.Split(rawValue, ",")

		return values, true
	}

	return defaultValue, true
}

func getIntSliceValues(w http.ResponseWriter, r *http.Request, param string, defaultValue []int64) ([]int64, bool) {
	rawValue := r.URL.Query().Get(param)

	if rawValue != "" {
		rawValues := strings.Split(rawValue, ",")
		values := make([]int64, 0, len(rawValues))

		for _, rv := range rawValues {
			value, err := strconv.ParseInt(rv, 10, 64)
			if err != nil {
				err = errors.WithStack(err)
				logger.Error(r.Context(), "could not parse int slice param", logger.F("param", param), logger.CapturedE(err))
				api.ErrorResponse(w, http.StatusBadRequest, api.ErrCodeMalformedRequest, nil)

				return nil, false
			}

			values = append(values, value)
		}

		return values, true
	}

	return defaultValue, true
}