// codeberg.org/mapleopentech/monorepo/cloud/maplefile-backend/internal/interface/http/blockedemail/create.go
package blockedemail

import (
	"bytes"
	"context"
	"encoding/json"
	"io"
	"net/http"

	"go.uber.org/zap"

	"codeberg.org/mapleopentech/monorepo/cloud/maplefile-backend/config"
	"codeberg.org/mapleopentech/monorepo/cloud/maplefile-backend/internal/interface/http/middleware"
	svc_blockedemail "codeberg.org/mapleopentech/monorepo/cloud/maplefile-backend/internal/service/blockedemail"
	"codeberg.org/mapleopentech/monorepo/cloud/maplefile-backend/pkg/httperror"
)

type CreateBlockedEmailHTTPHandler struct {
	config     *config.Configuration
	logger     *zap.Logger
	service    svc_blockedemail.CreateBlockedEmailService
	middleware middleware.Middleware
}

func NewCreateBlockedEmailHTTPHandler(
	config *config.Configuration,
	logger *zap.Logger,
	service svc_blockedemail.CreateBlockedEmailService,
	middleware middleware.Middleware,
) *CreateBlockedEmailHTTPHandler {
	logger = logger.Named("CreateBlockedEmailHTTPHandler")
	return &CreateBlockedEmailHTTPHandler{
		config:     config,
		logger:     logger,
		service:    service,
		middleware: middleware,
	}
}

func (*CreateBlockedEmailHTTPHandler) Pattern() string {
	return "POST /api/v1/me/blocked-emails"
}

func (h *CreateBlockedEmailHTTPHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
	h.middleware.Attach(h.Execute)(w, req)
}

func (h *CreateBlockedEmailHTTPHandler) unmarshalRequest(
	ctx context.Context,
	r *http.Request,
) (*svc_blockedemail.CreateBlockedEmailRequestDTO, error) {
	var requestData svc_blockedemail.CreateBlockedEmailRequestDTO

	defer r.Body.Close()

	var rawJSON bytes.Buffer
	teeReader := io.TeeReader(r.Body, &rawJSON)

	err := json.NewDecoder(teeReader).Decode(&requestData)
	if err != nil {
		h.logger.Error("decoding error",
			zap.Any("err", err))
		// Log raw JSON at debug level only to avoid PII exposure in production logs
		h.logger.Debug("raw request body for debugging",
			zap.String("json", rawJSON.String()))
		return nil, httperror.NewForSingleField(http.StatusBadRequest, "non_field_error", "payload structure is wrong")
	}

	return &requestData, nil
}

func (h *CreateBlockedEmailHTTPHandler) Execute(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/json")

	ctx := r.Context()

	req, err := h.unmarshalRequest(ctx, r)
	if err != nil {
		httperror.RespondWithError(w, r, err)
		return
	}

	resp, err := h.service.Execute(ctx, req)
	if err != nil {
		httperror.RespondWithError(w, r, err)
		return
	}

	w.WriteHeader(http.StatusCreated)
	if err := json.NewEncoder(w).Encode(resp); err != nil {
		h.logger.Error("failed to encode response",
			zap.Any("error", err))
		httperror.RespondWithError(w, r, err)
		return
	}
}