package accounts

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

	"github.com/gin-gonic/gin"

	"ruben/inventory2/internal/consts"
	"ruben/inventory2/internal/domains/accounts"
	"ruben/inventory2/internal/logging"
	"ruben/inventory2/internal/server/auth"
	"ruben/inventory2/internal/server/response"
	"ruben/inventory2/internal/server/sse"
)

// TODO: replace the redirects with 201s

type accountSubrouter struct {
	log   *logging.Logger
	accts *accounts.Store
}

func Routes(
	r *gin.RouterGroup,
	logger *logging.Logger,
	accts *accounts.Store,
	pub *sse.UpdateNotificationPublisher,
) {
	as := &accountSubrouter{
		log:   logger,
		accts: accts,
	}

	syncGroups := r.Group("/:acctID/inventory/sync-groups")
	syncGroups.POST("", response.Handler(as.saveNewSyncGroup))

	draftListings := syncGroups.Group("/draft/listings", pub.Publish("/:acctID/inventory/sync-groups/draft/listings"))
	draftListings.POST("", response.Handler(as.createSyncGroupListingDraft))
	draftListings.PUT("/:orderIndex/shop", response.Handler(as.setShopInSyncGroupListingDraft))
	draftListings.PUT("/:orderIndex/listing", response.Handler(as.setListingInSyncGroupListingDraft))
	draftListings.DELETE("/:orderIndex", response.Handler(as.deleteSyncGroupListingDraft))
}

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

	userID := auth.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("/api/accounts/%d", acct.AccountID)), nil
}

// POST /:acctID/inventory/sync-groups/draft/listings
func (s *accountSubrouter) createSyncGroupListingDraft(c *gin.Context) (response.Response, error) {
	r := c.Request
	ctx := r.Context()
	acctID := auth.GetIdentity(ctx).Account.AccountID

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

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

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

	orderIndex, err := getOrderIndexForSyncGroupListingDraftFromPath(c)
	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", response.ErrorFromConstant(err))
	}

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

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

	orderIndex, err := getOrderIndexForSyncGroupListingDraftFromPath(c)
	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", response.ErrorFromConstant(err))
	}

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

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

	orderIndex, err := getOrderIndexForSyncGroupListingDraftFromPath(c)
	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", response.ErrorFromConstant(err))
	}

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

// POST /:acctID/inventory/sync-groups
func (s *accountSubrouter) saveNewSyncGroup(c *gin.Context) (response.Response, error) {
	r := c.Request
	ctx := r.Context()
	acctID := auth.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", response.ErrorFromConstant(err))
	}

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

func getOrderIndexForSyncGroupListingDraftFromPath(c *gin.Context) (int, error) {
	orderIndexStr := c.Param("orderIndex")
	if orderIndexStr == "" {
		return 0, response.NotFound().
			Msg("no orderIndex found")
	}

	orderIndex, err := strconv.Atoi(orderIndexStr)
	if err != nil {
		return 0, response.NotFound().
			Msgf("invalid order index: %s", orderIndexStr)
	}

	return orderIndex, nil
}