package bsky

import (
	"encoding/json"
	"fmt"
	"sort"
	"strings"
	"time"
)

type Post struct {
	Text      string    `json:"text,omitempty"`
	Type      string    `json:"$type,omitempty"`
	Embed     *Embed    `json:"embed,omitempty"`
	Langs     []string  `json:"langs,omitempty"`
	Labels    *Labels   `json:"labels,omitempty"`
	Reply     *Reply    `json:"reply,omitempty"`
	Facets    *[]Facets `json:"facets,omitempty"`
	CreatedAt time.Time `json:"createdAt"`
}
type Ref struct {
	Link string `json:"$link,omitempty"`
}
type Thumb struct {
	Type     string `json:"$type,omitempty"`
	Ref      *Ref   `json:"ref,omitempty"`
	MimeType string `json:"mimeType,omitempty"`
	Size     int    `json:"size,omitempty"`
}
type External struct {
	URI         string `json:"uri,omitempty"`
	Thumb       *Thumb `json:"thumb,omitempty"`
	Title       string `json:"title,omitempty"`
	Description string `json:"description,omitempty"`
}
type Video struct {
	Type     string `json:"$type,omitempty"`
	Ref      *Ref   `json:"ref,omitempty"`
	MimeType string `json:"mimeType,omitempty"`
	Size     int    `json:"size,omitempty"`
}
type Image struct {
	Type     string `json:"$type,omitempty"`
	Ref      *Ref   `json:"ref,omitempty"`
	MimeType string `json:"mimeType,omitempty"`
	Size     int    `json:"size,omitempty"`
}
type AspectRatio struct {
	Width  int `json:"width,omitempty"`
	Height int `json:"height,omitempty"`
}
type Images struct {
	Alt         string       `json:"alt,omitempty"`
	Image       *Image       `json:"image,omitempty"`
	AspectRatio *AspectRatio `json:"aspectRatio,omitempty"`
}
type Media struct {
	Type        string       `json:"$type,omitempty"`
	External    *External    `json:"external,omitempty"`
	Video       *Video       `json:"video,omitempty"`
	Images      *[]Images    `json:"images,omitempty"`
	AspectRatio *AspectRatio `json:"aspectRatio,omitempty"`
}
type Record struct {
	Cid string `json:"cid,omitempty"`
	URI string `json:"uri,omitempty"`
}
type PostRecord struct {
	Type   string  `json:"$type,omitempty"`
	Cid    string  `json:"cid,omitempty"`
	URI    string  `json:"uri,omitempty"`
	Record *Record `json:"record,omitempty"`
}
type Embed struct {
	Type     string      `json:"$type,omitempty"`
	Media    *Media      `json:"media,omitempty"`
	Images   *[]Images   `json:"images,omitempty"`
	Video    *Video      `json:"video,omitempty"`
	Record   *PostRecord `json:"record,omitempty"`
	External *External   `json:"external,omitempty"`
}
type Values struct {
	Val string `json:"val,omitempty"`
}
type Labels struct {
	Type   string    `json:"$type,omitempty"`
	Values *[]Values `json:"values,omitempty"`
}
type Root struct {
	Cid string `json:"cid,omitempty"`
	URI string `json:"uri,omitempty"`
}
type Parent struct {
	Cid string `json:"cid,omitempty"`
	URI string `json:"uri,omitempty"`
}
type Reply struct {
	Root   *Root   `json:"root,omitempty"`
	Parent *Parent `json:"parent,omitempty"`
}
type Index struct {
	ByteEnd   int `json:"byteEnd,omitempty"`
	ByteStart int `json:"byteStart,omitempty"`
}
type Features struct {
	Did  string `json:"did,omitempty"`
	URI  string `json:"uri,omitempty"`
	Tag  string `json:"tag,omitempty"`
	Type string `json:"$type,omitempty"`
}
type Facets struct {
	Type     string      `json:"$type"`
	Index    *Index      `json:"index,omitempty"`
	Features *[]Features `json:"features,omitempty"`
}

type ParsedEmbeds struct {
	Type     string
	MimeType string
	Ref      string
	URI      string
	Width    int64
	Height   int64
}

func (b *BSky) ParsePost(post []byte) (*Post, error) {
	var p = &Post{}
	err := json.Unmarshal(post, &p)
	if err != nil {
		return nil, err
	}

	return p, nil
}

func (post *Post) ProcessFacets() string {
	if post == nil {
		return ""
	}

	if post.Facets == nil {
		return post.Text
	}

	sort.Slice((*post.Facets), func(i, j int) bool {
		return (*post.Facets)[i].Index.ByteStart < (*post.Facets)[j].Index.ByteStart
	})

	var result strings.Builder
	lastIndex := 0
	// post.Text = html.EscapeString(post.Text)

	for _, facet := range *post.Facets {
		start := facet.Index.ByteStart
		end := facet.Index.ByteEnd

		result.WriteString(post.Text[lastIndex:start])

		for _, feature := range *facet.Features {
			switch feature.Type {
			case "app.bsky.richtext.facet#mention":
				link := fmt.Sprintf(`<a href="https://bsky.app/profile/%s">%s</a>`, feature.Did, post.Text[start:end])
				result.WriteString(link)
			case "app.bsky.richtext.facet#link":
				link := fmt.Sprintf(`<a href="%s">%s</a>`, feature.URI, post.Text[start:end])
				result.WriteString(link)
			case "app.bsky.richtext.facet#tag":
				link := fmt.Sprintf(`<a href="https://bsky.app/search?q=%%23%s">%s</a>`, feature.Tag, post.Text[start:end])
				result.WriteString(link)
			default:
				result.WriteString(post.Text[start:end])
			}
		}
		lastIndex = end
	}
	result.WriteString(post.Text[lastIndex:])
	return result.String()
}

func (p *Post) GetEmbeds() *[]ParsedEmbeds {
	var parsedEmbeds = &[]ParsedEmbeds{}
	if p.Embed != nil {
		if p.Embed.Video != nil {
			parsedEmbed := ParsedEmbeds{
				URI:  p.Embed.Video.Ref.Link,
				Type: "video",
			}
			*parsedEmbeds = append(*parsedEmbeds, parsedEmbed)
		}
		if p.Embed.External != nil {
			if strings.Contains(p.Embed.External.URI, "media.tenor.com") {
				parsedEmbed := ParsedEmbeds{
					URI:  p.Embed.External.URI,
					Type: "external",
				}
				*parsedEmbeds = append(*parsedEmbeds, parsedEmbed)
			}
		}
		if p.Embed.Media != nil {
			if p.Embed.Media.Images != nil {
				for _, image := range *p.Embed.Media.Images {
					parsedEmbed := ParsedEmbeds{
						URI:  image.Image.Ref.Link,
						Type: "image",
					}
					*parsedEmbeds = append(*parsedEmbeds, parsedEmbed)
				}
			}
			if p.Embed.Media.Video != nil {
				parsedEmbed := ParsedEmbeds{
					URI:  p.Embed.Media.Video.Ref.Link,
					Type: "video",
				}
				*parsedEmbeds = append(*parsedEmbeds, parsedEmbed)
			}
			if p.Embed.Media.External != nil {
				parsedEmbed := ParsedEmbeds{
					URI:  p.Embed.Media.External.URI,
					Type: "external",
				}
				*parsedEmbeds = append(*parsedEmbeds, parsedEmbed)
			}
		}
		if p.Embed.Images != nil {
			for _, image := range *p.Embed.Images {
				parsedEmbed := ParsedEmbeds{
					URI:  image.Image.Ref.Link,
					Type: "image",
				}
				*parsedEmbeds = append(*parsedEmbeds, parsedEmbed)
			}
		}
	}
	return parsedEmbeds
}

func (p *Post) GetMedia() *Media {
	if p.GetEmbeds() != nil {
		if p.Embed.Media != nil {
			return p.Embed.Media
		}
	}
	return nil
}

func (p *Post) GetMediaImages() *[]Images {
	if p.GetMedia() != nil {
		return p.GetMedia().Images
	}
	return nil
}

func (p *Post) GetExternal() *External {
	if p.GetMedia() != nil {
		if p.GetMedia().External != nil {
			return p.GetMedia().External
		}
	}
	return nil
}

func (p *Post) IsReply() bool {
	return p.Reply != nil
}

func (p *Post) IsQuotePost() bool {
	if p.Embed != nil {
		if p.Embed.Record != nil {
			return true
		}
	}

	return false
}