package commons

import (
	"time"
)

// Domain represents a host to process for feeds
// Status: hold (pending review), pass (approved), skip (not processing), dead (retired TLD)
// CrawledAt: zero time = needs domain_check, +1 sec = needs feed_crawl, real time = done
type Domain struct {
	Host       string    `json:"host"`
	Status     string    `json:"status"`
	CrawledAt  time.Time `json:"crawled_at"`
	FeedsFound int       `json:"feeds_found,omitempty"`
	LastError  string    `json:"last_error,omitempty"`
	TLD        string    `json:"tld,omitempty"`
	MissCount  int       `json:"miss_count,omitempty"`
}

// MissCountThreshold is the number of consecutive errors before setting status to hold
const MissCountThreshold = 100

// Sentinel values for domain processing state
var (
	DomainStateUnchecked = time.Time{}                  // 0001-01-01 00:00:00 - needs domain_check
	DomainStateChecked   = time.Time{}.Add(time.Second) // 0001-01-01 00:00:01 - needs feed_crawl
)

// FullHost returns the complete hostname (host + tld)
func (d *Domain) FullHost() string {
	return FullHost(d.Host, d.TLD)
}

// Feed represents a discovered RSS/Atom feed with metadata
type Feed struct {
	URL         string `json:"url"`
	Type        string `json:"type"`     // "rss", "atom", "json", or "unknown"
	Category    string `json:"category"` // "main", "comments", "category", "author", "article", "podcast"
	Title       string `json:"title,omitempty"`
	Description string `json:"description,omitempty"`
	Language    string `json:"language,omitempty"`
	SiteURL     string `json:"site_url,omitempty"` // The website the feed belongs to

	// Timing
	DiscoveredAt  time.Time `json:"discovered_at"`
	LastCheckedAt time.Time `json:"last_checked_at,omitempty"` // feed_check: when last checked
	NextCheckAt   time.Time `json:"next_check_at,omitempty"`   // feed_check: when to next check
	LastBuildDate time.Time `json:"last_build_date,omitempty"` // From feed's lastBuildDate/updated

	// Cache headers for conditional requests
	ETag         string `json:"etag,omitempty"`
	LastModified string `json:"last_modified,omitempty"`

	// Health tracking
	Status      string    `json:"status"` // "pass", "hold", "skip"
	LastError   string    `json:"last_error,omitempty"`
	LastErrorAt time.Time `json:"last_error_at,omitempty"`

	// Discovery source
	SourceURL  string `json:"source_url,omitempty"`
	DomainHost string `json:"domain_host,omitempty"`
	DomainTLD  string `json:"domain_tld,omitempty"`

	// Content stats
	ItemCount      int       `json:"item_count,omitempty"` // Number of items in last feed_check
	OldestItemDate time.Time `json:"oldest_item_date,omitempty"`
	NewestItemDate time.Time `json:"newest_item_date,omitempty"`

	// Adaptive check interval
	NoUpdate int `json:"no_update"` // Consecutive checks with no change

	// Publishing to PDS
	PublishStatus  string `json:"publish_status"`            // "hold", "pass", "skip"
	PublishAccount string `json:"publish_account,omitempty"` // e.g., "news.ycombinator.com.1440.news"
}

// Enclosure represents a media attachment (audio, video, image)
type Enclosure struct {
	URL    string `json:"url"`
	Type   string `json:"type"`   // MIME type (audio/mpeg, image/jpeg, etc.)
	Length int64  `json:"length"` // Size in bytes
}

// Item represents an individual entry/article from a feed
type Item struct {
	FeedURL      string    `json:"feed_url"`
	GUID         string    `json:"guid,omitempty"`
	Title        string    `json:"title,omitempty"`
	Link         string    `json:"link,omitempty"`
	Description  string    `json:"description,omitempty"`
	Content      string    `json:"content,omitempty"`
	Author       string    `json:"author,omitempty"`
	PubDate      time.Time `json:"pub_date,omitempty"`
	DiscoveredAt time.Time `json:"discovered_at"`
	UpdatedAt    time.Time `json:"updated_at,omitempty"`

	// Media attachments
	Enclosure *Enclosure `json:"enclosure,omitempty"`  // Primary enclosure (podcast audio, etc.)
	ImageURLs []string   `json:"image_urls,omitempty"` // Image URLs extracted from content
	Tags      []string   `json:"tags,omitempty"`       // Category/tag strings from feed

	// Publishing to PDS
	PublishedAt  time.Time `json:"published_at,omitempty"`
	PublishedUri string    `json:"published_uri,omitempty"`
}

// ShortURL represents a shortened URL mapping
type ShortURL struct {
	Code        string    `json:"code"`
	OriginalURL string    `json:"original_url"`
	ItemGUID    string    `json:"item_guid,omitempty"`
	FeedURL     string    `json:"feed_url,omitempty"`
	CreatedAt   time.Time `json:"created_at"`
	ClickCount  int       `json:"click_count"`
}

// Click represents a click event on a short URL
type Click struct {
	ID        int64     `json:"id"`
	ShortCode string    `json:"short_code"`
	ClickedAt time.Time `json:"clicked_at"`
	Referrer  string    `json:"referrer,omitempty"`
	UserAgent string    `json:"user_agent,omitempty"`
	IPHash    string    `json:"ip_hash,omitempty"`
	Country   string    `json:"country,omitempty"`
}

// DashboardStats holds all statistics for the dashboard
type DashboardStats struct {
	// Domain stats
	TotalDomains int `json:"total_domains"`
	HoldDomains  int `json:"hold_domains"`
	PassDomains  int `json:"pass_domains"`
	SkipDomains  int `json:"skip_domains"`
	DeadDomains  int `json:"dead_domains"`

	// Feed stats
	TotalFeeds   int `json:"total_feeds"`
	AliveFeeds   int `json:"alive_feeds"`   // status='pass' (healthy feeds)
	PublishFeeds int `json:"publish_feeds"` // publish_status='pass' (approved for publishing)
	SkipFeeds    int `json:"skip_feeds"`
	HoldFeeds    int `json:"hold_feeds"`
	DeadFeeds    int `json:"dead_feeds"`
	EmptyFeeds   int `json:"empty_feeds"`
	RSSFeeds     int `json:"rss_feeds"`
	AtomFeeds    int `json:"atom_feeds"`
	JSONFeeds    int `json:"json_feeds"`
	UnknownFeeds int `json:"unknown_feeds"`

	// Processing rates (per minute)
	DomainsCrawled  int32 `json:"domains_crawled"`   // feed_crawl count
	DomainCheckRate int   `json:"domain_check_rate"` // domain_check per minute
	FeedCrawlRate   int   `json:"feed_crawl_rate"`   // feed_crawl per minute
	FeedCheckRate   int   `json:"feed_check_rate"`   // feed_check per minute

	// Timing
	UpdatedAt time.Time `json:"updated_at"`
}

// TLDStat holds TLD statistics
type TLDStat struct {
	TLD   string `json:"tld"`
	Count int    `json:"count"`
}

// DomainStat holds domain statistics
type DomainStat struct {
	Host       string `json:"host"`
	FeedsFound int    `json:"feeds_found"`
}

// FeedInfo holds basic feed metadata for profile setup
type FeedInfo struct {
	Title       string
	Description string
	SiteURL     string
	SourceHost  string
}