package rest

import (
	"fmt"
	"net/http"
	"strings"

	"github.com/gorilla/mux"

	"github.com/cosmos/cosmos-sdk/client/context"
	sdk "github.com/cosmos/cosmos-sdk/types"
	"github.com/cosmos/cosmos-sdk/types/rest"

	"github.com/kava-labs/kava/x/incentive/types"
)

func registerQueryRoutes(cliCtx context.CLIContext, r *mux.Router) {
	r.HandleFunc(fmt.Sprintf("/%s/claims", types.ModuleName), queryClaimsHandlerFn(cliCtx)).Methods("GET")
	r.HandleFunc(fmt.Sprintf("/%s/parameters", types.ModuleName), queryParamsHandlerFn(cliCtx)).Methods("GET")
}

func queryClaimsHandlerFn(cliCtx context.CLIContext) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		_, page, limit, err := rest.ParseHTTPArgsWithLimit(r, 0)
		if err != nil {
			rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
			return
		}
		cliCtx, ok := rest.ParseQueryHeightOrReturnBadRequest(w, cliCtx, r)
		if !ok {
			return
		}

		var owner sdk.AccAddress
		if x := r.URL.Query().Get(types.RestClaimOwner); len(x) != 0 {
			ownerStr := strings.ToLower(strings.TrimSpace(x))
			owner, err = sdk.AccAddressFromBech32(ownerStr)
			if err != nil {
				rest.WriteErrorResponse(w, http.StatusBadRequest, fmt.Sprintf("cannot parse address from claim owner %s", ownerStr))
				return
			}
		}

		queryParams := types.NewQueryClaimsParams(page, limit, owner)
		bz, err := cliCtx.Codec.MarshalJSON(queryParams)
		if err != nil {
			rest.WriteErrorResponse(w, http.StatusBadRequest, fmt.Sprintf("failed to marshal query params: %s", err))
			return
		}

		res, height, err := cliCtx.QueryWithData(fmt.Sprintf("custom/incentive/%s", types.QueryGetClaims), bz)
		if err != nil {
			rest.WriteErrorResponse(w, http.StatusInternalServerError, err.Error())
			return
		}

		cliCtx = cliCtx.WithHeight(height)
		rest.PostProcessResponse(w, cliCtx, res)
	}
}

func queryParamsHandlerFn(cliCtx context.CLIContext) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		cliCtx, ok := rest.ParseQueryHeightOrReturnBadRequest(w, cliCtx, r)
		if !ok {
			return
		}

		route := fmt.Sprintf("custom/%s/parameters", types.QuerierRoute)

		res, height, err := cliCtx.QueryWithData(route, nil)
		if err != nil {
			rest.WriteErrorResponse(w, http.StatusInternalServerError, err.Error())
			return
		}

		cliCtx = cliCtx.WithHeight(height)
		rest.PostProcessResponse(w, cliCtx, res)
	}
}