package org.terst.feedreader.data

import androidx.room.ColumnInfo
import androidx.room.Entity
import androidx.room.PrimaryKey

@Entity(tableName = "feeds")
data class FeedEntity(
    @PrimaryKey val id: String,          // the feed URL itself -- naturally unique, no need for a separate id scheme
    val title: String,
    val siteUrl: String? = null,         // the human-facing site link, if the feed provides one (distinct from the feed XML URL)
    val lastFetchedAt: Long? = null,
    val etag: String? = null,            // conditional-GET caching (If-None-Match) to avoid re-downloading unchanged feeds
    val lastModified: String? = null,    // conditional-GET caching (If-Modified-Since)
    val lastError: String? = null,       // set when a fetch fails; cleared on the next successful fetch
    val folder: String? = null,          // OPML category/outline this feed was imported under, if any -- null for ungrouped feeds
    val readerModeEnabled: Boolean = false // per-feed opt-IN, set only by explicitly tapping the reader-mode
    // toggle (never automatic/heuristic) -- once on, articles from this feed default to the
    // extracted view and auto-extract on open instead of requiring a per-article tap each time.
)

@Entity(tableName = "articles")
data class ArticleEntity(
    @PrimaryKey val id: String,          // guid if the feed provides one, else a hash of the link
    @ColumnInfo(index = true) override val feedId: String?, // null for a standalone article saved via the share-sheet target, not tied to any feed
    override val title: String,
    val link: String,
    val author: String? = null,
    val publishedAt: Long? = null,
    val feedContentHtml: String? = null,     // whatever content the feed itself provided (may be a summary, may be full text)
    val extractedContent: String? = null,    // Readability-extracted full text, filled in on first read if feedContentHtml was thin
    val imageUrl: String? = null,            // thumbnail, from media:thumbnail/enclosure or the first <img> in the feed content -- see FeedParser
    val isRead: Boolean = false,
    val readAt: Long? = null,                 // when isRead flipped true; null while unread or after an explicit "mark unread". Lets a just-read article linger in the Unread view until the next fetch instead of vanishing the instant it's read -- see observeUnread/observeOlderUnread.
    val isSaved: Boolean = false,             // explicitly kept (independent of read state) -- triggers a Stash save
    val stashArtifactId: String? = null,      // set once successfully archived to Stash; null means not yet saved or save failed
    val createdAt: Long
) : Titled

enum class FilterAction { MUTE, HIGHLIGHT }

@Entity(tableName = "filter_rules")
data class FilterRuleEntity(
    @PrimaryKey(autoGenerate = true) val id: Long = 0,
    val pattern: String,             // plain substring match, case-insensitive -- see FilterRuleEngine
    val action: FilterAction,
    val feedId: String? = null,      // null applies globally across all feeds
    val createdAt: Long
)