-- allium: 1
-- bDS Post Editor View
-- Scope: UI content area — post editing surface
-- Distilled from: PostEditor.tsx

-- Describes the layout and behaviour of the post editor rendered in
-- the main content area when a post tab is active.
-- Tab routing is in tabs.allium. Sidebar navigation is in sidebar_views.allium.

use "./tabs.allium" as tabs
use "./post.allium" as post
use "./i18n.allium" as i18n

-- ─── Post editor ──────────────────────────────────────────────

value PostEditorView {
    post_id: String
    header: PostEditorHeader
    metadata: PostEditorMetadata
    metadata_expanded: Boolean          -- starts expanded when title is empty
    excerpt_expanded: Boolean
    editor_mode: String                 -- visual | markdown | preview
    footer: PostEditorFooter
}

value PostEditorHeader {
    title: String                       -- post title or "Untitled"
    is_dirty: Boolean
    status: String                      -- draft | published | archived
    is_auto_saving: Boolean
}

value PostEditorMetadata {
    title: String                       -- editable text input
    tags: List<String>                  -- autocomplete chip input
    author: String?                     -- text input
    language: String?                   -- select from supported languages
    do_not_translate: Boolean           -- checkbox
    slug: String                        -- read-only text input
    categories: List<String>            -- chip input
    template_slug: String?              -- select (shown only when templates exist)
    post_links: PostLinksPanel
    linked_media: List<LinkedMediaItem>
}

value PostLinksPanel {
    backlinks: List<PostLinkReference>  -- posts linking to this post
    outlinks: List<PostLinkReference>   -- posts this post links to
}

value PostLinkReference {
    post_id: String
    title: String
}

value LinkedMediaItem {
    media_id: String
    has_thumbnail: Boolean
    name: String
    sort_order: Integer
}

value PostEditorFooter {
    created_at: String                  -- locale-formatted date
    updated_at: String                  -- locale-formatted date
    published_at: String?               -- locale-formatted date, only when post was published
}

value TranslationFlag {
    language: String
    flag_emoji: String
    status: String                      -- draft | published
    is_active: Boolean                  -- true when this language is currently being edited
}

surface TranslationFlagSurface {
    context flag: TranslationFlag

    exposes:
        flag.language
        flag.flag_emoji
        flag.status
        flag.is_active
}

surface PostEditorSurface {
    context editor: PostEditorView

    exposes:
        editor.header.title
        editor.header.is_dirty
        editor.header.status
        editor.header.is_auto_saving
        editor.metadata_expanded
        editor.excerpt_expanded
        editor.editor_mode
        editor.footer.created_at
        editor.footer.updated_at
        editor.footer.published_at when editor.footer.published_at != null

    provides:
        PostAIAnalysisRequested(editor.post_id)
        PostTranslateRequested(editor.post_id, target_language)
        PostSaved(editor.post_id)
        PostPublishRequested(editor.post_id)
            when editor.header.status = draft
        PostDiscardRequested(editor.post_id)
            when editor.header.status = draft
        PostDeleteRequested(editor.post_id)
        PostInsertLinkRequested(editor.post_id)
            when editor.editor_mode = markdown
        PostInsertMediaRequested(editor.post_id)
            when editor.editor_mode = markdown
        PostGalleryRequested(editor.post_id)
        ImageDroppedOnEditor(editor.post_id, file_path)
        PostLanguageDetectRequested(editor.post_id)

    @guarantee HeaderLayout
        -- Header bar with two areas.
        -- Left: title text with dirty indicator dot (●) when is_dirty is true.
        -- Right: status badge, auto-save indicator (when saving),
        --   Quick Actions dropdown, Publish button (only when draft, success style),
        --   Discard button (only when draft), Delete button.

    @guarantee QuickActionsDropdown
        -- Dropdown menu in header with two entries:
        --   AI Analysis (robot icon) — suggests title, excerpt, slug.
        --   Translate Post (globe icon) — opens translation modal.

    @guarantee MetadataSection
        -- Collapsible section. Starts expanded when title is empty.
        -- Two-column layout.
        -- Left column: Title, Tags, Author, Language + detect button,
        --   Do Not Translate checkbox, Slug (read-only), Categories,
        --   Template (select, only when templates exist), PostLinks.
        -- Right column: LinkedMediaPanel.

    @guarantee TagAutocomplete
        -- Tag input with autocomplete.
        -- Standard: prefix match on existing tag names (case-insensitive).
        -- When semanticSimilarityEnabled: also suggests tags from 10 similar posts,
        --   weighted by similarity, top 5 shown.
        -- Merged results: prefix matches first, then embedding suggestions.

    @guarantee TranslationFlagsBar
        -- Row of flag emoji buttons inline with metadata toggle.
        -- One flag per language: canonical language + each translation.
        -- Each flag shows status (draft/published) via CSS class.
        -- Active flag highlighted. Click switches editor to that language's draft.

    @guarantee ExcerptSection
        -- Collapsible section with textarea (4 rows).

    @guarantee EditorBodyToolbar
        -- Toolbar: "Content" label, mode toggle (Visual/Markdown/Preview),
        --   action buttons (markdown mode only): Gallery (with media count),
        --   Insert Post Link, Insert Media.

    @guarantee EditorModes
        -- Visual: rich-text WYSIWYG editor.
        -- Markdown: code editor with markdown-with-macros language,
        --   highlighting [[macro ...]] syntax. Word wrap on, minimap off, 14px font.
        -- Preview: iframe showing rendered preview.

    @guarantee DragDropImages
        -- Drop image file onto editor area triggers import chain.

    @guarantee FooterLayout
        -- Three date stamps: Created, Updated, Published (only when published_at exists).
        -- Locale-formatted dates.

    @guarantee LinkedMediaPanel
        -- Right column of metadata showing media items linked to this post.
        -- Actions: Import & Link (native file dialog), Link Existing (media picker),
        --   Unlink (no confirmation), Reorder (drag handle), Click (opens media tab).
}

config {
    post_auto_save_delay: Integer = 3000
    post_content_sample_length: Integer = 2000
}

invariant PostAutoSave {
    -- Auto-saves after config.post_auto_save_delay ms of idle in the editor.
    -- Also auto-saves on unmount/tab switch.
    -- Ctrl/Cmd+S triggers immediate save.
    -- Saves: title, content, excerpt, tags, categories, templateSlug, language.
}

invariant PostDirtyTracking {
    -- Compares canonical draft + translation drafts against saved state.
    -- Dirty indicator shown in header (●) and tab bar.
}

invariant PostEditorModePersistence {
    -- Editor mode (visual/markdown/preview) persists per session.
    -- Default mode comes from editor settings.
}

-- ─── Post editor actions ────────────────────────────────────

rule PostAIAnalysis {
    when: PostAIAnalysisRequested(post_id)
    -- Gate: airplane mode check (see action_patterns.allium AIOperationGating)
    -- Uses title model (not default chat model)
    -- Input: post title + excerpt + content (first config.post_content_sample_length chars)
    -- Response: suggested title, excerpt, slug
    -- Opens AISuggestionsModal with 3 fields:
    --   Each field: current value, suggested value, accept checkbox
    --   Slug field locked (no accept checkbox) if post was ever published
    -- On confirm: applies only checked fields, triggers auto-save
}

rule PostTranslateAction {
    when: PostTranslateRequested(post_id, target_language)
    -- Gate: airplane mode check
    -- Opens language picker modal:
    --   Available target languages from project blogLanguages
    --   Existing translations shown with status badge (draft/published)
    -- Two sequential AI calls via title model:
    --   1. Translate metadata (title, excerpt) to target language
    --   2. Translate content (full markdown body) to target language
    -- Creates/updates translation record in DB
    -- If source post is published: transitions source to draft
    --   (copies file content back to DB so it can be edited)
}

rule PostAutoTranslateOnSave {
    when: PostSaved(post_id)
    -- Gate: airplane mode check + auto_translate not disabled (doNotTranslate=false)
    -- For each configured blog language missing a translation:
    --   Enqueue background translation task (title model)
    -- Each task: translate metadata + content, create translation record
    -- Cascades to linked media: for each linked media item,
    --   translate media metadata for missing languages
    -- See action_patterns.allium AutoTranslationChain for full chain
}

rule PostPublishAction {
    when: PostPublishRequested(post_id)
    -- Implicit save first (awaited) if post is dirty
    -- Then calls engine publish (see engine_side_effects.allium PublishPostSideEffects)
    -- Also publishes all translations whose source language is published
    -- UI updates: status badge -> published, sidebar section move
}

rule PostDiscardChanges {
    when: PostDiscardRequested(post_id)
    -- Only available for published posts with pending draft changes
    -- System confirm dialog: "Discard changes to this post?"
    -- On confirm: reads published version from .md file,
    --   restores DB to published state (content=null, status=published)
    -- Editor reloads with restored content
}

rule PostDeleteAction {
    when: PostDeleteRequested(post_id)
    -- System confirm dialog: "Delete this post?"
    -- If published: also deletes .md file and all translation files
    -- If never published: only deletes DB record
    -- Removes from DB, closes tab, sidebar removes item
    -- See engine_side_effects.allium DeletePostSideEffects
}

rule PostInsertLink {
    when: PostInsertLinkRequested(post_id)
    -- Keyboard shortcut: Ctrl/Cmd+K
    -- Opens InsertPostLinkModal with two tabs: Internal, External
    -- Internal tab:
    --   Search input (debounced, queries post titles)
    --   Results list: title + status badge (draft/published)
    --   If semantic similarity enabled: results ranked by similarity
    --   Click inserts markdown link: [title](/YYYY/MM/DD/slug)
    --   "Create Post" option at bottom of search results:
    --     Creates new post with search query as title
    --     Inserts link to newly created post
    -- External tab:
    --   URL input + optional display text input
    --   Inserts: [text](url) or bare url if no display text
}

rule PostInsertMedia {
    when: PostInsertMediaRequested(post_id)
    -- Opens InsertMediaModal (media search variant)
    -- Search input, grid of media items with bds-thumb:// thumbnails
    -- Click inserts markdown:
    --   Images: ![alt](bds-media://id)
    --   Non-images: [originalName](bds-media://id)
}

rule PostGalleryAction {
    when: PostGalleryRequested(post_id)
    -- Opens gallery overlay showing all media linked to this post
    -- Image grid with bds-thumb:// thumbnails
    -- Click on image opens lightbox (full-size bds-media:// preview)
    -- Lightbox: left/right arrow navigation, close button, ESC to close
}

rule PostDragDropImage {
    when: ImageDroppedOnEditor(post_id, file_path)
    -- Chain of operations (see action_patterns.allium DragDropImageChain):
    -- 1. Import media file -> media record + file copy + sidecar
    -- 2. Generate thumbnails (async: small/medium/large/ai)
    -- 3. Link media to post (update sidecar linkedPostIds)
    -- 4. Insert markdown image at cursor: ![](bds-media://id)
    -- 5. If AI available: AI image analysis (async, auto-applied, no modal)
    -- 6. If auto-translate enabled: cascade translate media metadata
    -- Steps 1-4 synchronous. Steps 5-6 background tasks.
}

rule PostLanguageDetect {
    when: PostLanguageDetectRequested(post_id)
    -- Gate: airplane mode check
    -- Sends content sample to title model
    -- Auto-sets post language field (no modal)
    -- Triggers auto-save
}