package handlers

import (
	"fmt"
	"strconv"

	"github.com/gofiber/fiber/v3"
	"lmika.dev/lmika/weiro/models"
	"lmika.dev/lmika/weiro/services/posts"
)

type PostsHandler struct {
	PostService *posts.Service
}

func (ph PostsHandler) Index(c fiber.Ctx) error {
	var req struct {
		Filter string `query:"filter"`
	}
	if err := c.Bind().Query(&req); err != nil {
		return fiber.ErrBadRequest
	}

	posts, err := ph.PostService.ListPosts(c.Context(), req.Filter == "deleted")
	if err != nil {
		return err
	}

	return accepts(c, json(func() any {
		return posts
	}), html(func(c fiber.Ctx) error {
		return c.Render("posts/index", fiber.Map{
			"req":   req,
			"posts": posts,
		})
	}))
}

func (ph PostsHandler) New(c fiber.Ctx) error {
	p := models.Post{
		GUID:  models.NewNanoID(),
		State: models.StateDraft,
	}

	return c.Render("posts/edit", fiber.Map{
		"post": p,
	})
}

func (ph PostsHandler) Edit(c fiber.Ctx) error {
	postIDStr := c.Params("postID")
	if postIDStr == "" {
		return fiber.ErrBadRequest
	}
	postID, err := strconv.ParseInt(postIDStr, 10, 64)
	if err != nil {
		return fiber.ErrBadRequest
	}

	post, err := ph.PostService.GetPost(c.Context(), postID)
	if err != nil {
		return err
	}

	return accepts(c, json(func() any {
		return post
	}), html(func(c fiber.Ctx) error {
		return c.Render("posts/edit", fiber.Map{
			"post": post,
		})
	}))
}

func (ph PostsHandler) Update(c fiber.Ctx) error {
	var req posts.CreatePostParams
	if err := c.Bind().Body(&req); err != nil {
		return err
	}

	post, err := ph.PostService.UpdatePost(c.Context(), req)
	if err != nil {
		return err
	}

	return accepts(c, json(func() any {
		// TODO: should be created if brand new
		return post
	}), html(func(c fiber.Ctx) error {
		return c.Redirect().To(fmt.Sprintf("/sites/%v/posts", post.SiteID))
	}))
}

func (ph PostsHandler) Patch(c fiber.Ctx) error {
	postIDStr := c.Params("postID")
	if postIDStr == "" {
		return fiber.ErrBadRequest
	}
	postID, err := strconv.ParseInt(postIDStr, 10, 64)
	if err != nil {
		return fiber.ErrBadRequest
	}

	var req struct {
		Action string `json:"action"`
	}
	if err := c.Bind().Body(&req); err != nil {
		return err
	}

	switch req.Action {
	case "restore":
		if err := ph.PostService.RestorePost(c.Context(), postID); err != nil {
			return err
		}
	default:
		return fiber.ErrBadRequest
	}

	return accepts(c, json(func() any {
		return struct{}{}
	}), html(func(c fiber.Ctx) error {

		return c.Redirect().To(fmt.Sprintf("/sites/%v/posts"))
	}))
}

func (ph PostsHandler) Delete(c fiber.Ctx) error {
	postIDStr := c.Params("postID")
	if postIDStr == "" {
		return fiber.ErrBadRequest
	}

	postID, err := strconv.ParseInt(postIDStr, 10, 64)
	if err != nil {
		return fiber.ErrBadRequest
	}

	var req struct {
		Hard bool `query:"hard"`
	}
	if err := c.Bind().Query(&req); err != nil {
		return err
	}

	if err := ph.PostService.DeletePost(c.Context(), postID, req.Hard); err != nil {
		return err
	}

	return accepts(c, json(func() any {
		return fiber.Map{}
	}), html(func(c fiber.Ctx) error {
		return c.Redirect().To("/sites")
	}))
}