"""Additional Pydantic response models for the ObsiGate REST API.

These models enrich the auto-generated OpenAPI 3.1 schema (#72). They are
intentionally permissive (``extra="allow"``) so that adding a new field to an
existing endpoint never breaks response validation — the model documents the
stable, public shape while still accepting internal additions.

Models whose endpoints are already typed in :mod:`backend.main` (e.g.
``FileContentResponse``) live there; this module only holds the ones used to
fill the gaps.
"""

from typing import Any

from pydantic import BaseModel, ConfigDict, Field

# ---------------------------------------------------------------------------
# Generic helpers
# ---------------------------------------------------------------------------


class StatusResponse(BaseModel):
    """Generic ``{"status": "..."}`` acknowledgement."""

    model_config = ConfigDict(extra="allow")
    status: str = Field(default="ok", description="Operation status")


class ErrorResponse(BaseModel):
    """Standard FastAPI error envelope."""

    detail: str | list[dict[str, Any]] | None = Field(
        default=None,
        description="Human-readable error message, or a list of validation errors",
        examples=["Vault 'Notes' not found"],
    )


# ---------------------------------------------------------------------------
# Recent files & bookmarks
# ---------------------------------------------------------------------------


class RecentFileItem(BaseModel):
    """A recently opened or recently modified file."""

    path: str = Field(description="Relative path within the vault")
    title: str = Field(description="File title")
    vault: str = Field(description="Vault name")
    mtime: float | int | str | None = Field(default=None, description="Modification timestamp")
    mtime_human: str | None = Field(default=None, description="Human-readable modification time")
    mtime_iso: str | None = Field(default=None, description="ISO-8601 modification time")
    size_bytes: int | None = Field(default=None, description="File size in bytes")
    tags: list[str] = Field(default_factory=list, description="Up to 5 leading tags")
    preview: str | None = Field(default=None, description="Short content preview")
    bookmarked: bool | None = Field(default=None, description="Whether the file is bookmarked")


class RecentResponse(BaseModel):
    """Response for ``GET /api/recent``."""

    files: list[RecentFileItem]
    total: int = Field(description="Total number of files in the selected mode")
    limit: int = Field(description="Applied limit")
    mode: str = Field(description="'opened' or 'modified'")

    model_config = ConfigDict(
        json_schema_extra={
            "example": {
                "files": [
                    {
                        "path": "notes/Accueil.md",
                        "title": "Accueil",
                        "vault": "TestVault",
                        "mtime": 1750000000.0,
                        "mtime_human": "il y a 2 h",
                        "size_bytes": 1024,
                        "tags": ["#accueil"],
                        "preview": "# Bienvenue…",
                        "bookmarked": False,
                    }
                ],
                "total": 1,
                "limit": 20,
                "mode": "opened",
            }
        }
    )


class BookmarkFileItem(BaseModel):
    """A bookmarked file."""

    path: str = Field(description="Relative path within the vault")
    title: str = Field(description="File title")
    vault: str = Field(description="Vault name")
    mtime: float | int | str | None = Field(default=None, description="Bookmark timestamp")
    mtime_human: str | None = Field(default=None, description="Human-readable bookmark time")
    size_bytes: int | None = Field(default=None, description="File size in bytes")
    tags: list[str] = Field(default_factory=list, description="Up to 5 leading tags")
    bookmarked: bool | None = Field(default=True, description="Always true for this endpoint")


class BookmarksResponse(BaseModel):
    """Response for ``GET /api/bookmarks``."""

    files: list[BookmarkFileItem]
    total: int = Field(description="Number of bookmarked files")


class BookmarkToggleResponse(BaseModel):
    """Response for ``POST /api/bookmarks/toggle``."""

    bookmarked: bool = Field(description="New bookmark state")


class SavedSearch(BaseModel):
    """A persisted search definition."""

    model_config = ConfigDict(extra="allow")
    id: str = Field(description="Unique identifier (millisecond timestamp)")
    query: str = Field(description="Search query text")
    vault: str = Field(default="all", description="Vault filter")
    case_sensitive: bool = Field(default=False)
    whole_word: bool = Field(default=False)
    regex: bool = Field(default=False)
    include_paths: str = Field(default="")
    exclude_paths: str = Field(default="")
    created_at: float = Field(description="Creation timestamp (epoch seconds)")


# ---------------------------------------------------------------------------
# Backups & diffs
# ---------------------------------------------------------------------------


class BackupsResponse(BaseModel):
    """Response for ``GET /api/file/{vault}/backups``."""

    vault: str
    path: str
    backups: list[dict[str, Any]] = Field(description="Backups, newest first")


class BacklinksResponse(BaseModel):
    """Response for ``GET /api/file/{vault}/backlinks``."""

    vault: str
    path: str
    backlinks: list[dict[str, Any]] = Field(description="Files linking to the target")
    total: int


class BackupsListResponse(BaseModel):
    """Response for ``GET /api/backups``."""

    backups: list[dict[str, Any]] = Field(description="All backups across vaults")
    total: int
    total_size_bytes: int


class BackupsDeletedResponse(BaseModel):
    """Response for backup deletion / purge endpoints."""

    deleted: int = Field(description="Number of backup files deleted")


class BackupContentResponse(BaseModel):
    """Response for ``GET /api/backups/content``."""

    content: str = Field(description="Backup file content (truncated to 100 KB)")
    name: str = Field(description="Backup file name")
    size: int = Field(description="Returned content size in characters")


class BackupsCompressResponse(BaseModel):
    """Response for ``POST /api/backups/compress``."""

    compressed: int = Field(description="Number of backups processed")
    saved_bytes: int = Field(description="Bytes saved by gzip compression")
    dry_run: bool


class BackupsAutoResponse(BaseModel):
    """Response for ``POST /api/backups/auto``."""

    backed_up: int = Field(description="Number of files backed up")
    since_hours: int | float = Field(description="Look-back window in hours")


class DiffResponse(BaseModel):
    """Response containing a unified diff between two file versions (#85 — extrait de backend.main, inchangé)."""

    vault: str = Field(description="Vault name")
    path: str = Field(description="Relative file path")
    version: int = Field(description="Backup version timestamp (left/old side)")
    compare_with: int | None = Field(default=None, description="Other backup version or null for current file (right/new side)")
    diff: str = Field(description="Unified diff (empty if no changes)")


class RestoreRequest(BaseModel):
    """Request to restore a file from a backup (#85 — extrait de backend.main, inchangé)."""

    version: int = Field(description="Timestamp of the backup version to restore")


class RestoreResponse(BaseModel):
    """Response after restoring a file from backup (#85 — extrait de backend.main, inchangé)."""

    success: bool = Field(description="Whether restore succeeded")
    vault: str = Field(description="Vault name")
    path: str = Field(description="Relative file path")
    restored_from: int = Field(description="Timestamp of the backup used")
    current_backed_up: int | None = Field(default=None, description="Timestamp of the backup created from the current version before restore, if any")


# ---------------------------------------------------------------------------
# Search / suggest / graph (#85 — extrait de backend.main, inchangé)
# ---------------------------------------------------------------------------


class SearchResultItem(BaseModel):
    """A single search result."""

    vault: str = Field(description="Vault name")
    path: str = Field(description="Relative file path")
    title: str = Field(description="File title")
    tags: list[str] = Field(description="File tags")
    score: int = Field(description="Relevance score")
    snippet: str = Field(description="Content excerpt with highlights")
    modified: str = Field(description="ISO 8601 modification timestamp")


class SearchResponse(BaseModel):
    """Full-text search response with optional pagination."""

    query: str = Field(description="Original search query")
    vault_filter: str = Field(description="Vault filter applied ('all' or vault name)")
    tag_filter: str | None = Field(default=None, description="Tag filter applied")
    count: int = Field(description="Number of results in this response")
    total: int = Field(default=0, description="Total results before pagination")
    offset: int = Field(default=0, description="Current pagination offset")
    limit: int = Field(default=200, description="Page size")
    results: list[SearchResultItem] = Field(description="Search result items")


class TagsResponse(BaseModel):
    """Tag aggregation response."""

    vault_filter: str | None = Field(default=None, description="Vault filter applied")
    tags: dict[str, int] = Field(description="Tag name → count mapping")


class TreeSearchResult(BaseModel):
    """A single tree search result item."""

    vault: str = Field(description="Vault name")
    path: str = Field(description="Full relative path")
    name: str = Field(description="File or directory name")
    type: str = Field(description="'file' or 'directory'")
    matched_path: str = Field(description="Path segment that matched the query")


class TreeSearchResponse(BaseModel):
    """Tree search response with matching paths."""

    query: str = Field(description="Search query")
    vault_filter: str = Field(description="Vault filter applied")
    results: list[TreeSearchResult] = Field(description="Matching files and directories")


class VaultPathEntry(BaseModel):
    """A single indexed path (file or directory) in a vault."""

    vault: str = Field(description="Vault name")
    path: str = Field(description="Full relative path")
    name: str = Field(description="File or directory name")
    type: str = Field(description="'file' or 'directory'")


class VaultPathsResponse(BaseModel):
    """Flat list of every indexed path in a vault (capped)."""

    vault: str = Field(description="Vault name")
    count: int = Field(description="Number of returned entries")
    results: list[VaultPathEntry] = Field(description="Indexed files and directories")


class AdvancedSearchResultItem(BaseModel):
    """A single advanced search result with highlighted snippet."""

    vault: str = Field(description="Vault name")
    path: str = Field(description="Relative file path")
    title: str = Field(description="File title")
    tags: list[str] = Field(description="File tags")
    score: float = Field(description="TF-IDF relevance score (or fused RRF score in semantic mode)")
    semantic_score: float = Field(default=0.0, description="Cosine similarity from the semantic index (0 when unavailable)")
    snippet: str = Field(description="Content excerpt with <mark> highlights")
    modified: str = Field(description="ISO 8601 modification timestamp")
    extension: str = Field(default="", description="File extension")


class SearchFacets(BaseModel):
    """Faceted counts for search results."""

    tags: dict[str, int] = Field(default_factory=dict)
    vaults: dict[str, int] = Field(default_factory=dict)


class AdvancedSearchResponse(BaseModel):
    """Advanced search response with TF-IDF scoring, facets, and pagination."""

    results: list[AdvancedSearchResultItem] = Field(description="Search results")
    total: int = Field(description="Total number of matching results")
    offset: int = Field(description="Current pagination offset")
    limit: int = Field(description="Page size")
    facets: SearchFacets = Field(description="Faceted counts by tag and vault")
    query_time_ms: float = Field(default=0, description="Server-side query time in milliseconds")
    semantic_available: bool = Field(default=False, description="True when the semantic (embedding) index is ready")


class TitleSuggestion(BaseModel):
    """A file title suggestion for autocomplete."""

    vault: str = Field(description="Vault name")
    path: str = Field(description="Relative file path")
    title: str = Field(description="File title")


class SuggestResponse(BaseModel):
    """Autocomplete suggestions for file titles."""

    query: str = Field(description="Original query string")
    suggestions: list[TitleSuggestion] = Field(description="Matching file suggestions")


class TagSuggestion(BaseModel):
    """A tag suggestion for autocomplete."""

    tag: str = Field(description="Tag name")
    count: int = Field(description="Number of files with this tag")


class TagSuggestResponse(BaseModel):
    """Autocomplete suggestions for tags."""

    query: str = Field(description="Original query string")
    suggestions: list[TagSuggestion] = Field(description="Matching tag suggestions")


class GraphNode(BaseModel):
    """A single node in the graph view."""

    id: str = Field(description="Unique node identifier")
    name: str = Field(description="Display name")
    type: str = Field(description="'vault', 'directory', or 'file'")
    path: str = Field(description="Relative path within vault")
    size: int = Field(default=0, description="File size in bytes")
    tags: list[str] = Field(default_factory=list, description="Tags from frontmatter")
    incoming_count: int = Field(default=0, description="Number of incoming wikilinks")
    outgoing_count: int = Field(default=0, description="Number of outgoing wikilinks")


class GraphEdge(BaseModel):
    """An edge between two nodes in the graph view."""

    source: str = Field(description="Source node ID")
    target: str = Field(description="Target node ID")
    relation: str = Field(description="'parent', 'wikilink', or 'backlink'")


class GraphResponse(BaseModel):
    """Graph data for a vault or directory."""

    vault: str = Field(description="Vault name")
    path: str = Field(description="Root path for the graph")
    scope: str = Field(default="directory", description="'directory' or 'full'")
    nodes: list[GraphNode] = Field(description="Graph nodes (files and directories)")
    edges: list[GraphEdge] = Field(description="Graph edges (parent and wikilink relations)")


class ReloadResponse(BaseModel):
    """Index reload confirmation with per-vault stats."""

    status: str = Field(description="Reload status ('ok' or 'error')")
    vaults: dict[str, Any] = Field(description="Per-vault file counts after reload")


# ---------------------------------------------------------------------------
# PDF
# ---------------------------------------------------------------------------


class PdfInfoResponse(BaseModel):
    """Response for ``GET /api/file/{vault}/pdf/info``."""

    vault: str
    path: str
    pages: int = Field(description="Page count")
    title: str = Field(description="PDF title (metadata or filename)")
    author: str = Field(default="", description="PDF author")
    size_bytes: int = Field(description="File size in bytes")

    model_config = ConfigDict(
        json_schema_extra={
            "example": {
                "vault": "TestVault",
                "path": "docs/rapport.pdf",
                "pages": 12,
                "title": "Rapport annuel",
                "author": "ObsiGate",
                "size_bytes": 524288,
            }
        }
    )


# ---------------------------------------------------------------------------
# Search & replace
# ---------------------------------------------------------------------------


class ReplaceMatch(BaseModel):
    """A single file affected by a find/replace operation."""

    model_config = ConfigDict(extra="allow")
    vault: str
    path: str
    title: str | None = None
    match_count: int | None = Field(default=None, description="Occurrences found (dry run)")
    replacements: int | None = Field(default=None, description="Occurrences replaced")
    preview: list[str] = Field(default_factory=list, description="Context snippets (dry run)")


class ReplaceResponse(BaseModel):
    """Response for ``POST /api/search/replace``."""

    model_config = ConfigDict(extra="allow")
    matches: list[ReplaceMatch] = Field(default_factory=list, description="Dry-run matches")
    replaced: list[ReplaceMatch] = Field(default_factory=list, description="Applied replacements")
    total_matches: int | None = Field(default=None, description="Total matches (dry run)")
    total_replacements: int = Field(description="Total replacements performed or previewed")
    dry_run: bool | None = Field(default=None, description="True when no file was written")


# ---------------------------------------------------------------------------
# Vaults, attachments & settings
# ---------------------------------------------------------------------------


class VaultStatsResponse(BaseModel):
    """Response for ``POST /api/vaults/add`` and ``GET /api/index/reload/{vault}``."""

    model_config = ConfigDict(extra="allow")
    status: str = Field(default="ok")
    vault: str
    stats: dict[str, Any] = Field(default_factory=dict, description="Index statistics for the vault")


class VaultActionResponse(BaseModel):
    """Response for ``DELETE /api/vaults/{vault}``."""

    status: str = Field(default="ok")
    vault: str


class VaultStatusEntry(BaseModel):
    """Per-vault status entry."""

    file_count: int
    tag_count: int
    path: str = ""
    watching: bool = False


class VaultsStatusResponse(BaseModel):
    """Response for ``GET /api/vaults/status``."""

    vaults: dict[str, VaultStatusEntry]
    watcher_active: bool
    sse_clients: int


class AttachmentRescanResponse(BaseModel):
    """Response for ``POST /api/attachments/rescan/{vault}``."""

    status: str = Field(default="ok")
    vault: str
    attachment_count: int


class AttachmentStatsResponse(BaseModel):
    """Response for ``GET /api/attachments/stats``."""

    vaults: dict[str, Any] = Field(description="Vault name → attachment statistics")


class VaultSettingsResponse(BaseModel):
    """Response for the per-vault display settings endpoints."""

    model_config = ConfigDict(extra="allow")
    hideHiddenFiles: bool = Field(default=False, description="Hide dotfiles in the tree")


class AllVaultSettingsResponse(BaseModel):
    """Response for ``GET /api/vaults/settings/all``."""

    model_config = ConfigDict(extra="allow")


class VaultFileEntry(BaseModel):
    """A file entry returned by the vault home listing."""

    model_config = ConfigDict(extra="allow")
    name: str
    path: str
    vault: str
    size: int = 0
    modified: float = 0
    modified_iso: str | None = None
    extension: str = ""
    rel_dir: str | None = None


class VaultFilesResponse(BaseModel):
    """Response for ``GET /api/vault/{vault}/files``."""

    vault: str
    directory: str = ""
    recursive: bool = True
    count: int
    files: list[VaultFileEntry]


# ---------------------------------------------------------------------------
# Configuration, AI keys & diagnostics
# ---------------------------------------------------------------------------


class AppConfigResponse(BaseModel):
    """Application configuration (``GET/POST /api/config``)."""

    model_config = ConfigDict(extra="allow")


class AIKeysResponse(BaseModel):
    """Masked AI provider keys (``GET /api/config/ai-keys``)."""

    model_config = ConfigDict(extra="allow")


class AIKeyDeleteResponse(BaseModel):
    """Response for ``DELETE /api/config/ai-keys/{provider}``."""

    status: str = Field(default="deleted")
    key: str = Field(description="Deleted environment variable name")


class AITestResponse(BaseModel):
    """Response for ``POST /api/config/ai-keys/test`` (provider → status)."""

    model_config = ConfigDict(extra="allow")


class AIModelsResponse(BaseModel):
    """Response for ``GET /api/config/ai-models``."""

    model_config = ConfigDict(extra="allow")
    models: list[str] = Field(default_factory=list, description="Available model identifiers")
    source: str = Field(default="fallback", description="'live', 'fallback' or 'validation'")
    count: int | None = Field(default=None, description="Number of live models")
    error: str | None = Field(default=None, description="Provider/network error, if any")
    note: str | None = Field(default=None, description="Explanatory note when using fallback")
    capabilities: dict[str, dict[str, bool]] = Field(
        default_factory=dict,
        description="Per-model capability flags (chat, embeddings, vision, …)",
    )


class DiagnosticsResponse(BaseModel):
    """Response for ``GET /api/diagnostics``."""

    model_config = ConfigDict(extra="allow")
    index: dict[str, Any] = Field(default_factory=dict)
    inverted_index: dict[str, Any] = Field(default_factory=dict)
    config: dict[str, Any] = Field(default_factory=dict)


class DashboardVaultStat(BaseModel):
    """Per-vault dashboard statistics."""

    name: str
    file_count: int
    tag_count: int
    total_size_bytes: int
    image_count: int = 0


class DashboardResponse(BaseModel):
    """Response for ``GET /api/dashboard``."""

    vaults: list[DashboardVaultStat]
    total_files: int
    total_tags: int
    total_size_bytes: int
    total_images: int = 0


# ---------------------------------------------------------------------------
# System / health (#85 — extrait de backend.main, comportement inchangé)
# ---------------------------------------------------------------------------


class HealthResponse(BaseModel):
    """Application health status.

    Déplacé depuis :mod:`backend.main` sans modification : pas de
    ``extra="allow"`` ici, pour préserver la validation actuelle des
    réponses (les champs enrichis de ``/api/health/detailed`` restent
    filtrés comme avant).
    """

    status: str = Field(description="Health status ('ok' or 'error')")
    version: str = Field(description="Application version (x.y.z — latest release tag)")
    vaults: int = Field(description="Number of configured vaults")
    total_files: int = Field(description="Total indexed files across all vaults")
    total_tokens: int = Field(description="Total indexed tokens (approx.) across all vaults", default=0)
    last_full_index_ts: str = Field(description="ISO timestamp of last full index rebuild", default="")
    uptime_seconds: int = Field(description="Server uptime in seconds", default=0)
    git_describe: str = Field(default="", description="Full git describe string (commits beyond tag), empty if no git")
    git_commit: str = Field(default="", description="Short HEAD commit hash, empty if no git")


# ---------------------------------------------------------------------------
# Webhooks, sharing & conflicts
# ---------------------------------------------------------------------------


class WebhookModel(BaseModel):
    """A configured webhook."""

    model_config = ConfigDict(extra="allow")
    id: str = Field(description="Webhook UUID")
    name: str
    url: str = Field(description="Target HTTP(S) URL")
    events: list[str] = Field(default_factory=list, description="Subscribed event types")
    secret: str | None = Field(default=None, description="HMAC-SHA256 signing secret")
    enabled: bool = True
    created_at: str | None = None
    last_fired_at: str | None = None


class ShareModel(BaseModel):
    """A public document share."""

    model_config = ConfigDict(extra="allow")
    id: str
    token: str = Field(description="Opaque share token")
    vault: str
    path: str
    url: str | None = Field(default=None, description="Relative public URL (/s/{token})")
    created_by: str | None = None
    created_at: str | None = None
    expires_at: str | None = None
    access_count: int = 0
    last_accessed: str | None = None


class ConflictEntry(BaseModel):
    """A Syncthing sync-conflict file."""

    model_config = ConfigDict(extra="allow")
    vault: str
    path: str
    original_path: str | None = None


class ConflictsResponse(BaseModel):
    """Response for ``GET /api/conflicts``."""

    conflicts: list[ConflictEntry]
    total: int


class ConflictResolveResponse(BaseModel):
    """Response for ``POST /api/conflicts/resolve``."""

    status: str = Field(default="resolved")
    action: str | None = Field(default=None, description="'keep_local' or 'keep_conflict'")


# ---------------------------------------------------------------------------
# AI status & BooksLM context
# ---------------------------------------------------------------------------


class AIProviderStatus(BaseModel):
    """Availability of a single AI provider."""

    available: bool
    model: str | None = Field(default=None, description="Default model when the provider is configured")


class AIAutocompleteStatus(BaseModel):
    """Status of the local Ollama autocomplete backend."""

    available: bool = False
    server_ok: bool = False
    model_loaded: bool = False
    model: str = ""
    error: str | None = None


class AIStatusResponse(BaseModel):
    """Response for ``GET /api/ai/status``."""

    configured: bool = Field(description="True when at least one provider has an API key")
    default_provider: str
    providers: dict[str, AIProviderStatus]
    autocomplete: AIAutocompleteStatus


class BooksLMContextFile(BaseModel):
    """A single document included in the BooksLM context."""

    path: str
    title: str
    content: str
    type: str = Field(default="markdown", description="'markdown' (and future types)")


class BooksLMContextResponse(BaseModel):
    """Response for ``POST /api/ai/bookslm/context``."""

    files: list[BooksLMContextFile]
    total_chars: int
    file_count: int
    directory_tree: str = ""
    max_total_chars: int = Field(default=200000, description="Configured context character limit")
    max_files: int = Field(default=200, description="Configured file-count limit")
    scope: str = Field(default="directory", description="Context scope: 'directory', 'documents' or 'general'")