package posts

import (
	"time"

	"backend/app/errorx"
	"backend/app/events/publishers"
	"backend/app/http/medias"
	"backend/app/http/tenants"
	"backend/app/http/users"
	"backend/app/requests"
	"backend/database/fields"
	"backend/database/schemas/public/model"
	"backend/providers/event"
	"backend/providers/hashids"
	"backend/providers/jwt"

	"github.com/gofiber/fiber/v3"
	"github.com/jinzhu/copier"
	"github.com/samber/lo"
	log "github.com/sirupsen/logrus"
)

// @provider
type Controller struct {
	event *event.PubSub

	svc       *Service
	hashId    *hashids.Hasher
	userSvc   *users.Service
	tenantSvc *tenants.Service
	mediaSvc  *medias.Service
	log       *log.Entry `inject:"false"`
}

func (c *Controller) Prepare() error {
	c.log = log.WithField("module", "posts.Controller")
	return nil
}

// List show posts list
// @Router			/api/v1/posts [get]
// @Bind claim local
// @Bind pagination query
// @Bind filter query
func (c *Controller) List(ctx fiber.Ctx, claim *jwt.Claims, pagination *requests.Pagination, filter *UserPostFilter) (*requests.Pager, error) {
	pagination.Format()
	pager := &requests.Pager{
		Pagination: *pagination,
	}

	filter.TenantID = *claim.TenantID
	filter.UserID = claim.UserID
	orders, total, err := c.svc.GetPosts(ctx.Context(), pagination, filter)
	if err != nil {
		return nil, err
	}
	pager.Total = total

	pager.Items = lo.FilterMap(orders, func(item model.Posts, _ int) (UserPost, bool) {
		var o UserPost
		if err := copier.Copy(&o, item); err != nil {
			return o, false
		}
		return o, true
	})

	return pager, nil
}

// ListBought show user bought posts list
// @Router			/api/v1/bought-posts [get]
// @Bind claim local
// @Bind pagination query
// @Bind filter query
func (c *Controller) ListBought(ctx fiber.Ctx, claim *jwt.Claims, pagination *requests.Pagination, filter *UserPostFilter) (*requests.Pager, error) {
	pagination.Format()
	pager := &requests.Pager{
		Pagination: *pagination,
	}

	filter.TenantID = *claim.TenantID
	filter.UserID = claim.UserID
	orders, total, err := c.svc.GetBoughtPosts(ctx.Context(), pagination, filter)
	if err != nil {
		return nil, err
	}
	pager.Total = total

	pager.Items = lo.FilterMap(orders, func(item model.Posts, _ int) (UserPost, bool) {
		var o UserPost
		if err := copier.Copy(&o, item); err != nil {
			return o, false
		}
		return o, true
	})

	return pager, nil
}

// Show show posts detail
// @Router			/api/v1/show/:hash [get]
// @Bind claim local
// @Bind hash path
func (c *Controller) Show(ctx fiber.Ctx, claim *jwt.Claims, hash string) (*UserPost, error) {
	userPost := &UserPost{}

	postId, err := c.hashId.DecodeOnlyInt64(hash)
	if err != nil {
		return nil, errorx.RecordNotExists
	}

	post, err := c.svc.GetPostByID(ctx.Context(), postId)
	if err != nil {
		return nil, err
	}

	if err := copier.Copy(userPost, post); err != nil {
		return nil, err
	}

	return userPost, nil
}

// @Router     /api/v1/posts [post]
// @Bind claim local
// @Bind tenantSlug cookie key(tenant)
// @Bind body body
func (ctl *Controller) Create(ctx fiber.Ctx, claim *jwt.Claims, tenantSlug string, body *PostBody) error {
	user, err := ctl.userSvc.GetUserByID(ctx.Context(), claim.UserID)
	if err != nil {
		return err
	}

	tenant, err := ctl.tenantSvc.GetTenantBySlug(ctx.Context(), tenantSlug)
	if err != nil {
		return err
	}

	// check media assets exists
	ids := lo.Map(body.Assets.Data, func(item fields.MediaAsset, _ int) int64 { return item.Media })
	medias, err := ctl.mediaSvc.GetMediasByIDs(ctx.Context(), tenant.ID, user.ID, ids)
	if err != nil {
		return err
	}

	if len(medias) != len(lo.Uniq(ids)) {
		return errorx.BadRequest
	}

	post := &model.Posts{
		CreatedAt:   time.Now(),
		UpdatedAt:   time.Now(),
		TenantID:    tenant.ID,
		UserID:      user.ID,
		Title:       body.Title,
		Description: body.Description,
		Content:     body.Content,
		Price:       body.Price,
		Discount:    body.Discount,
		Assets:      body.Assets,
		Tags:        body.Tags,

		Stage:  fields.PostStagePending,
		Status: fields.PostStatusPending,
	}

	if err := ctl.svc.Create(ctx.Context(), tenant, user, post); err != nil {
		return err
	}

	_ = ctl.event.Publish(&publishers.PostCreated{ID: post.ID})

	return nil
}

// Delete
// @Router			/api/v1/posts/:hash [delete]
// @Bind claim local
// @Bind tenantSlug cookie key(tenant)
// @Bind hash path
func (c *Controller) Delete(ctx fiber.Ctx, claim *jwt.Claims, tenantSlug, hash string) error {
	tenant, err := c.tenantSvc.GetTenantBySlug(ctx.Context(), tenantSlug)
	if err != nil {
		return err
	}

	postId, err := c.hashId.DecodeOnlyInt64(hash)
	if err != nil {
		return errorx.RecordNotExists
	}

	if err := c.svc.Delete(ctx.Context(), tenant.ID, *&claim.UserID, postId); err != nil {
		return err
	}

	// trigger event
	_ = c.event.Publish(&publishers.PostDeleted{ID: postId})

	return nil
}

// Update
// @Router			/api/v1/posts/:hash [put]
// @Bind claim local
// @Bind tenantSlug cookie key(tenant)
// @Bind hash path
// @Bind body body
func (ctl *Controller) Update(ctx fiber.Ctx, claim *jwt.Claims, hash string, body *PostBody) error {
	postId, err := ctl.hashId.DecodeOnlyInt64(hash)
	if err != nil {
		return errorx.RecordNotExists
	}

	post, err := ctl.svc.GetPostByID(ctx.Context(), postId)
	if err != nil {
		return err
	}

	// check media assets exists
	ids := lo.Map(body.Assets.Data, func(item fields.MediaAsset, _ int) int64 { return item.Media })
	medias, err := ctl.mediaSvc.GetMediasByIDs(ctx.Context(), *claim.TenantID, post.UserID, ids)
	if err != nil {
		return err
	}

	if len(medias) != len(lo.Uniq(ids)) {
		return errorx.BadRequest
	}

	_ = ctl.event.Publish(&publishers.PostUpdatedEvent{ID: postId})

	m := &model.Posts{
		UpdatedAt:   time.Now(),
		Title:       body.Title,
		Description: body.Description,
		Content:     body.Content,
		Price:       body.Price,
		Discount:    body.Discount,
		Assets:      body.Assets,
		Tags:        body.Tags,

		Stage:  fields.PostStagePending,
		Status: fields.PostStatusPending,
	}

	if err := ctl.svc.Update(ctx.Context(), post.TenantID, post.UserID, post.ID, m); err != nil {
		return err
	}
	// todo: trigger event post updated
	return nil
}