package social.grain.support

import social.grain.data.model.AspectRatio
import social.grain.data.model.AtLabel
import social.grain.data.model.GalleryViewerState
import social.grain.data.model.GrainComment
import social.grain.data.model.GrainGallery
import social.grain.data.model.GrainNotification
import social.grain.data.model.GrainPhoto
import social.grain.data.model.GrainProfile
import social.grain.data.model.GrainProfileDetailed
import social.grain.data.model.GrainStory
import social.grain.data.model.GrainStoryAuthor
import social.grain.data.model.H3Location
import social.grain.util.nowIso
import java.time.Instant

/**
 * Hand-built models for tests that need something to render or reason over.
 *
 * Deliberately not read off the network like the older decode tests: those
 * exist to catch the server changing shape, and these exist to pin behaviour
 * down to one input, which a live feed can't do.
 */
object Fixtures {

    fun instant(minutesAgo: Long = 0): Instant =
        Instant.parse("2026-03-01T12:00:00Z").minusSeconds(minutesAgo * 60)

    fun iso(minutesAgo: Long = 0): String = nowIso(instant(minutesAgo))

    /** Recent enough that anything with a 24-hour window still counts it. */
    fun recentIso(minutesAgo: Long = 5): String =
        nowIso(Instant.now().minusSeconds(minutesAgo * 60))

    fun profile(
        did: String = "did:plc:alice",
        handle: String = "alice.grain.social",
        displayName: String? = "Alice",
        avatar: String? = "https://cdn.grain.test/avatar/alice.jpg",
    ) = GrainProfile(
        cid = "cid-$did",
        did = did,
        handle = handle,
        displayName = displayName,
        avatar = avatar,
        createdAt = iso(60 * 24 * 30),
    )

    fun profileDetailed(
        did: String = "did:plc:alice",
        handle: String = "alice.grain.social",
        displayName: String? = "Alice",
        following: String? = null,
        followedBy: String? = null,
        blocking: String? = null,
        muted: Boolean? = null,
        labels: List<AtLabel>? = null,
    ) = GrainProfileDetailed(
        cid = "cid-$did",
        did = did,
        handle = handle,
        displayName = displayName,
        description = "Photographs of things",
        avatar = "https://cdn.grain.test/avatar/$handle.jpg",
        cameras = listOf("Fujifilm X100V"),
        followersCount = 120,
        followsCount = 80,
        galleryCount = 12,
        createdAt = iso(60 * 24 * 30),
        viewer = social.grain.data.model.ActorViewerState(
            following = following,
            followedBy = followedBy,
            blocking = blocking,
            muted = muted,
        ),
        labels = labels,
    )

    fun photo(
        index: Int = 0,
        width: Int = 3,
        height: Int = 2,
        alt: String? = null,
    ) = GrainPhoto(
        uri = "at://did:plc:alice/social.grain.photo/photo$index",
        cid = "cid-photo$index",
        thumb = "https://cdn.grain.test/thumb/$index.jpg",
        fullsize = "https://cdn.grain.test/full/$index.jpg",
        alt = alt,
        aspectRatio = AspectRatio(width, height),
    )

    fun gallery(
        rkey: String = "gallery1",
        title: String? = "A walk in the fog",
        description: String? = "Six frames from a grey morning",
        creator: GrainProfile = profile(),
        photos: Int = 3,
        favCount: Int? = 12,
        commentCount: Int? = 3,
        labels: List<AtLabel>? = null,
        favUri: String? = null,
        location: H3Location? = null,
    ) = GrainGallery(
        uri = "at://${creator.did}/social.grain.gallery/$rkey",
        cid = "cid-$rkey",
        title = title,
        description = description,
        location = location,
        locationDisplay = location?.name,
        creator = creator,
        items = List(photos) { photo(it) },
        favCount = favCount,
        commentCount = commentCount,
        labels = labels,
        createdAt = iso(30),
        indexedAt = iso(30),
        viewer = GalleryViewerState(fav = favUri),
    )

    fun comment(
        rkey: String = "comment1",
        text: String = "Lovely light",
        author: GrainProfile = profile(),
        replyTo: String? = null,
        favUri: String? = null,
        minutesAgo: Long = 10,
    ) = GrainComment(
        uri = "at://${author.did}/social.grain.comment/$rkey",
        cid = "cid-$rkey",
        author = author,
        text = text,
        replyTo = replyTo,
        createdAt = iso(minutesAgo),
        favCount = 0,
        viewer = social.grain.data.model.CommentViewerState(fav = favUri),
    )

    fun story(
        rkey: String = "story1",
        creator: GrainProfile = profile(),
        createdAt: String = recentIso(),
        expired: Boolean? = null,
        favUri: String? = null,
        labels: List<AtLabel>? = null,
    ) = GrainStory(
        uri = "at://${creator.did}/social.grain.story/$rkey",
        cid = "cid-$rkey",
        creator = creator,
        thumb = "https://cdn.grain.test/story-thumb/$rkey.jpg",
        fullsize = "https://cdn.grain.test/story/$rkey.jpg",
        aspectRatio = AspectRatio(9, 16),
        createdAt = createdAt,
        labels = labels,
        expired = expired,
        viewer = social.grain.data.model.StoryViewerState(fav = favUri),
    )

    fun storyAuthor(
        profile: GrainProfile = profile(),
        storyCount: Int = 2,
        latestAt: String = recentIso(),
    ) = GrainStoryAuthor(profile = profile, storyCount = storyCount, latestAt = latestAt)

    fun notification(
        rkey: String = "notif1",
        reason: String = "gallery-favorite",
        author: GrainProfile = profile(),
        galleryUri: String? = "at://did:plc:alice/social.grain.gallery/gallery1",
        minutesAgo: Long = 5,
        commentText: String? = null,
    ) = GrainNotification(
        uri = "at://${author.did}/notification/$rkey",
        reason = reason,
        createdAt = iso(minutesAgo),
        author = author,
        galleryUri = galleryUri,
        galleryTitle = "A walk in the fog",
        galleryThumb = "https://cdn.grain.test/thumb/0.jpg",
        commentText = commentText,
    )
}

/** Encode a fixture to the JSON the stub server hands back. */
inline fun <reified T> json(value: T): String = testJson.encodeToString(value)