package model

import (
	"strings"
	"time"
)

type User struct {
	ID  string `json:"id"`
	DID string `json:"did"`
}

type ATProtoSession struct {
	UserID        string    `json:"user_id"`
	DID           string    `json:"did"`
	PDSURL        string    `json:"pds_url"`
	AccessToken   string    `json:"access_token"`
	RefreshToken  string    `json:"refresh_token"`
	DPoPKeyJWK    string    `json:"dpop_key_jwk"`
	DPoPNonce     string    `json:"dpop_nonce"`
	TokenEndpoint string    `json:"token_endpoint"`
	ExpiresAt     time.Time `json:"expires_at"`
	UpdatedAt     time.Time `json:"updated_at"`
}

// --- Document model (Diffdown lexicon) ---

type Document struct {
	// ATProto metadata
	URI  string `json:"uri,omitempty"`
	CID  string `json:"cid,omitempty"`
	RKey string `json:"rkey,omitempty"`
	// Document fields
	Title         string            `json:"title"`
	Content       *MarkdownContent  `json:"content,omitempty"`
	TextContent   string            `json:"textContent,omitempty"`
	Collaborators []string          `json:"collaborators,omitempty"`
	Comments      []EmbeddedComment `json:"comments,omitempty"`
	CreatedAt     string            `json:"createdAt"`
	UpdatedAt     string            `json:"updatedAt,omitempty"`
}

type MarkdownContent struct {
	Type   string       `json:"$type"`
	Flavor string       `json:"flavor"`
	Text   MarkdownText `json:"text"`
}

type MarkdownText struct {
	RawMarkdown string `json:"rawMarkdown"`
}

type EmbeddedComment struct {
	ID           string `json:"id"`         // random 8-char hex for dedup
	ThreadID     string `json:"threadId"`   // links to ProseMirror comment mark
	QuotedText   string `json:"quotedText"` // text the comment was anchored to
	Text         string `json:"text"`
	Author       string `json:"author"`       // DID
	AuthorHandle string `json:"authorHandle"` // resolved handle, may be empty
	CreatedAt    string `json:"createdAt"`    // RFC3339
}

type CommentRecord struct {
	ID           string `json:"id"`                // record key (rkey)
	ThreadID     string `json:"threadId"`          // groups replies into threads
	DocRKey      string `json:"docRKey"`           // document rkey this comment belongs to
	DocOwnerDID  string `json:"docOwnerDid"`       // owner DID for quick filtering
	QuotedText   string `json:"quotedText"`        // text the comment was anchored to
	Text         string `json:"text"`              // comment content
	Author       string `json:"author"`            // DID
	AuthorHandle string `json:"authorHandle"`      // resolved handle
	CreatedAt    string `json:"createdAt"`         // RFC3339
	ReplyTo      string `json:"replyTo,omitempty"` // parent comment URI (null for root)
	Resolved     bool   `json:"resolved"`          // thread resolution state
}

type Invite struct {
	ID           string    `json:"id"`
	DocumentRKey string    `json:"document_rkey"`
	Token        string    `json:"token"`
	CreatedBy    string    `json:"created_by"`
	CreatedAt    time.Time `json:"created_at"`
	ExpiresAt    time.Time `json:"expires_at"`
}

// RKeyFromURI extracts the rkey (last path segment) from an at:// URI.
func RKeyFromURI(uri string) string {
	parts := strings.Split(uri, "/")
	if len(parts) > 0 {
		return parts[len(parts)-1]
	}
	return ""
}

const (
	CollectionDocument = "com.diffdown.document"
	CollectionComment  = "com.diffdown.comment"
)