package server

import (
	"fmt"
	"github.com/spf13/viper"
	"strings"
	"time"

	"git.solsynth.dev/hydrogen/interactive/pkg/database"
	"git.solsynth.dev/hydrogen/interactive/pkg/models"
	"git.solsynth.dev/hydrogen/interactive/pkg/services"
	"github.com/gofiber/fiber/v2"
	"github.com/google/uuid"
)

func contextComment() *services.PostTypeContext {
	return &services.PostTypeContext{
		Tx:         database.C,
		TableName:  "comments",
		ColumnName: "comment",
		CanReply:   false,
		CanRepost:  true,
	}
}

func listComment(c *fiber.Ctx) error {
	take := c.QueryInt("take", 0)
	offset := c.QueryInt("offset", 0)

	alias := c.Params("postId")

	mx := c.Locals(postContextKey).(*services.PostTypeContext).
		FilterPublishedAt(time.Now())

	item, err := mx.GetViaAlias(alias)
	if err != nil {
		return fiber.NewError(fiber.StatusNotFound, err.Error())
	}

	data, err := mx.ListComment(item.ID, take, offset)
	if err != nil {
		return fiber.NewError(fiber.StatusInternalServerError, err.Error())
	}

	count, err := mx.CountComment(item.ID)
	if err != nil {
		return fiber.NewError(fiber.StatusInternalServerError, err.Error())
	}

	return c.JSON(fiber.Map{
		"count": count,
		"data":  data,
	})
}

func createComment(c *fiber.Ctx) error {
	user := c.Locals("principal").(models.Account)

	var data struct {
		Content     string            `json:"content" form:"content" validate:"required"`
		PublishedAt *time.Time        `json:"published_at" form:"published_at"`
		Hashtags    []models.Tag      `json:"hashtags" form:"hashtags"`
		Categories  []models.Category `json:"categories" form:"categories"`
		ReplyTo     uint              `json:"reply_to" form:"reply_to"`
	}

	if err := BindAndValidate(c, &data); err != nil {
		return err
	}

	item := &models.Comment{
		PostBase: models.PostBase{
			Alias:       strings.ReplaceAll(uuid.NewString(), "-", ""),
			PublishedAt: data.PublishedAt,
			AuthorID:    user.ID,
		},
		Hashtags:   data.Hashtags,
		Categories: data.Categories,
		Content:    data.Content,
	}

	postType := c.Params("postType")
	alias := c.Params("postId")

	var err error
	var res models.Feed

	var columnName string
	var tableName string

	switch postType {
	case "moments":
		columnName = "moment"
		tableName = viper.GetString("database.table_prefix") + "moments"
		err = database.C.Model(&models.Moment{}).Where("alias = ?", alias).Select("id").First(&res).Error
	case "articles":
		columnName = "article"
		tableName = viper.GetString("database.table_prefix") + "articles"
		err = database.C.Model(&models.Article{}).Where("alias = ?", alias).Select("id").First(&res).Error
	default:
		return fiber.NewError(fiber.StatusBadRequest, "comment must belongs to a resource")
	}

	if err != nil {
		return fiber.NewError(fiber.StatusBadRequest, fmt.Sprintf("belongs to resource was not found: %v", err))
	} else {
		switch postType {
		case "moments":
			item.MomentID = &res.ID
		case "articles":
			item.ArticleID = &res.ID
		}
	}

	var relatedCount int64
	if data.ReplyTo > 0 {
		if err := database.C.Where("id = ?", data.ReplyTo).
			Model(&models.Comment{}).Count(&relatedCount).Error; err != nil {
			return fiber.NewError(fiber.StatusBadRequest, err.Error())
		} else if relatedCount <= 0 {
			return fiber.NewError(fiber.StatusNotFound, "related post was not found")
		} else {
			item.ReplyID = &data.ReplyTo
		}
	}

	item, err = services.NewPost(item)
	if err != nil {
		return fiber.NewError(fiber.StatusBadRequest, err.Error())
	}

	// Notify the original poster their post is commented by someone
	go services.CommentNotify(item, res, columnName, tableName)

	return c.JSON(item)
}

func editComment(c *fiber.Ctx) error {
	user := c.Locals("principal").(models.Account)
	id, _ := c.ParamsInt("commentId", 0)

	var data struct {
		Content     string            `json:"content" form:"content" validate:"required"`
		PublishedAt *time.Time        `json:"published_at" form:"published_at"`
		Hashtags    []models.Tag      `json:"hashtags" form:"hashtags"`
		Categories  []models.Category `json:"categories" form:"categories"`
	}

	if err := BindAndValidate(c, &data); err != nil {
		return err
	}

	var item *models.Comment
	if err := database.C.Where(models.Comment{
		PostBase: models.PostBase{
			BaseModel: models.BaseModel{ID: uint(id)},
			AuthorID:  user.ID,
		},
	}).First(&item).Error; err != nil {
		return fiber.NewError(fiber.StatusNotFound, err.Error())
	}

	item.Content = data.Content
	item.PublishedAt = data.PublishedAt
	item.Hashtags = data.Hashtags
	item.Categories = data.Categories

	if item, err := services.EditPost(item); err != nil {
		return fiber.NewError(fiber.StatusBadRequest, err.Error())
	} else {
		return c.JSON(item)
	}
}

func deleteComment(c *fiber.Ctx) error {
	user := c.Locals("principal").(models.Account)
	id, _ := c.ParamsInt("commentId", 0)

	var item *models.Comment
	if err := database.C.Where(models.Comment{
		PostBase: models.PostBase{
			BaseModel: models.BaseModel{ID: uint(id)},
			AuthorID:  user.ID,
		},
	}).First(&item).Error; err != nil {
		return fiber.NewError(fiber.StatusNotFound, err.Error())
	}

	if err := services.DeletePost(item); err != nil {
		return fiber.NewError(fiber.StatusBadRequest, err.Error())
	}

	return c.SendStatus(fiber.StatusOK)
}