package server

import (
	"errors"
	"fmt"
	"net/http"
	"strconv"

	"ruben/inventory2/internal/consts"
	"ruben/inventory2/internal/domains/accounts"
	"ruben/inventory2/internal/server/middleware"
	"ruben/inventory2/internal/server/response"
)

// POST /accounts
func (s *Server) createAccount(r *http.Request) (response.Response, error) {
	ctx := r.Context()
	email := r.FormValue("email")
	if email == "" {
		return nil, response.BadRequest().Msg("no email provided")
	}

	userID := middleware.GetIdentity(ctx).User.UserID

	acct, err := s.accts.CreateAccount(ctx, userID, email)
	if err != nil {
		if errors.Is(err, consts.ErrConflict) {
			return nil, response.Conflict().
				Msg("user already has an account")
		}
		return nil, response.Errorf("failed to create account: %w", err)
	}

	return response.SeeOther(fmt.Sprintf("/accounts/%d", acct.AccountID)), nil
}

// POST /accounts/{acctID}/inventory/sync-groups/draft/listings
func (s *Server) createSyncGroupListingDraft(r *http.Request) (response.Response, error) {
	ctx := r.Context()
	acctID := middleware.GetIdentity(ctx).Account.AccountID

	orderIndex, err := s.accts.CreateSyncGroupListingDraft(ctx, acctID)
	if err != nil {
		return nil, response.Errorf("failed to create new listing draft: %w", err)
	}

	return response.Redirect(
		http.StatusSeeOther,
		fmt.Sprintf("/accounts/%d/inventory/sync-groups/draft/listings/%d", acctID, orderIndex),
	), nil
}

// PUT /accounts/{acctID}/inventory/sync-groups/draft/listings/{orderIndex}/shop
// @platform 	string
// @shopID 		string
func (s *Server) setShopInSyncGroupListingDraft(r *http.Request) (response.Response, error) {
	ctx := r.Context()
	acctID := middleware.GetIdentity(ctx).Account.AccountID

	orderIndex, err := getOrderIndexForSyncGroupListingDraftFromPath(r)
	if err != nil {
		return nil, err
	}

	platformStr := r.FormValue("platform")
	platform, err := accounts.NewPlatform(platformStr)
	if err != nil {
		return nil, response.BadRequest().
			Msgf("unrecognized platform: %s", platformStr)
	}

	shopID := r.FormValue("shop-id")
	if shopID == "" {
		return nil, response.BadRequest().
			Msg("no shop-id provided")
	}

	if err := s.accts.SetShopInSyncGroupListingDraft(ctx, acctID, orderIndex, platform, shopID); err != nil {
		return nil, response.Errorf("failed to set shop: %w", mapConstantErrorsToHTTPErrors(err))
	}

	return response.Redirect(
		http.StatusSeeOther,
		fmt.Sprintf("/accounts/%d/inventory/sync-groups/draft/listings/%d", acctID, orderIndex),
	), nil
}

// PUT /accounts/{acctID}/inventory/sync-groups/draft/listings/{orderIndex}/listing
func (s *Server) setListingInSyncGroupListingDraft(r *http.Request) (response.Response, error) {
	ctx := r.Context()
	acctID := middleware.GetIdentity(ctx).Account.AccountID

	orderIndex, err := getOrderIndexForSyncGroupListingDraftFromPath(r)
	if err != nil {
		return nil, err
	}

	listingID := r.FormValue("listing-id")
	if listingID == "" {
		return nil, response.BadRequest().
			Msg("no listing-id provided")
	}

	if err := s.accts.SetListingInSyncGroupListingDraft(ctx, acctID, orderIndex, listingID); err != nil {
		return nil, response.Errorf("failed to set listing: %w", mapConstantErrorsToHTTPErrors(err))
	}

	return response.Redirect(
		http.StatusSeeOther,
		fmt.Sprintf("/accounts/%d/inventory/sync-groups/draft/listings/%d", acctID, orderIndex),
	), nil
}

// DELETE /accounts/{acctID}/inventory/sync-groups/draft/listings/{orderIndex}
func (s *Server) deleteSyncGroupListingDraft(r *http.Request) (response.Response, error) {
	ctx := r.Context()
	acctID := middleware.GetIdentity(ctx).Account.AccountID

	orderIndex, err := getOrderIndexForSyncGroupListingDraftFromPath(r)
	if err != nil {
		return nil, err
	}

	if _, err := s.accts.DeleteSyncGroupListingDraft(ctx, acctID, orderIndex); err != nil {
		return nil, response.Errorf("failed to delete listing: %w", mapConstantErrorsToHTTPErrors(err))
	}

	return response.Status(200), nil
}

// POST /accounts/{acctID}/inventory/sync-groups
func (s *Server) saveNewSyncGroup(r *http.Request) (response.Response, error) {
	ctx := r.Context()
	acctID := middleware.GetIdentity(ctx).Account.AccountID

	grp, err := s.accts.SaveNewSyncGroup(ctx, acctID)
	if err != nil {
		return nil, response.Errorf("failed to save new sync group: %w", mapConstantErrorsToHTTPErrors(err))
	}

	return response.Redirect(
		http.StatusSeeOther,
		// TODO: template not implemented
		fmt.Sprintf("/accounts/%d/inventory/sync-groups/%d", acctID, grp.SyncGroupID),
	), nil
}

func getOrderIndexForSyncGroupListingDraftFromPath(r *http.Request) (int, error) {
	orderIndexStr := r.PathValue("orderIndex")
	orderIndex, err := strconv.Atoi(orderIndexStr)
	if err != nil {
		return 0, response.NotFound().
			Msgf("no listing draft found at %s", orderIndexStr)
	}

	return orderIndex, nil
}