import { sqliteTable, text, integer, uniqueIndex } from 'drizzle-orm/sqlite-core';

// Projects table - stores blog projects/websites
export const projects = sqliteTable('projects', {
  id: text('id').primaryKey(),
  name: text('name').notNull(),
  slug: text('slug').notNull().unique(),
  description: text('description'),
  dataPath: text('data_path'), // Custom path for project data (null = default userData/projects/{id})
  createdAt: integer('created_at', { mode: 'timestamp' }).notNull(),
  updatedAt: integer('updated_at', { mode: 'timestamp' }).notNull(),
  isActive: integer('is_active', { mode: 'boolean' }).notNull().default(false),
});

// Posts table - stores metadata for blog posts
// Draft content is stored in the `content` column.
// Published content lives on the filesystem; `filePath` points to the .md file.
// When a post is published, `content` is cleared (moved to file).
// When a published post is edited, `content` holds draft changes and status becomes 'draft'.
export const posts = sqliteTable('posts', {
  projectId: text('project_id').notNull(),
  id: text('id').primaryKey(),
  title: text('title').notNull(),
  slug: text('slug').notNull(),
  excerpt: text('excerpt'),
  content: text('content'), // Draft body text (null/empty when published — content is in the file)
  status: text('status', { enum: ['draft', 'published', 'archived'] }).notNull().default('draft'),
  author: text('author'),
  createdAt: integer('created_at', { mode: 'timestamp' }).notNull(),
  updatedAt: integer('updated_at', { mode: 'timestamp' }).notNull(),
  publishedAt: integer('published_at', { mode: 'timestamp' }),
  filePath: text('file_path').notNull().default(''), // Empty for never-published drafts
  checksum: text('checksum'),
  tags: text('tags'), // JSON array stored as text
  categories: text('categories'), // JSON array stored as text
  // Legacy columns (kept for migration compatibility, no longer written)
  publishedTitle: text('published_title'),
  publishedContent: text('published_content'),
  publishedTags: text('published_tags'),
  publishedCategories: text('published_categories'),
  publishedExcerpt: text('published_excerpt'),
}, (table) => ({
  // Composite unique index: slug must be unique within each project
  projectSlugIdx: uniqueIndex('posts_project_slug_idx').on(table.projectId, table.slug),
}));

// Media table - stores metadata for images and other media
export const media = sqliteTable('media', {
  projectId: text('project_id').notNull(),
  id: text('id').primaryKey(),
  filename: text('filename').notNull(),
  originalName: text('original_name').notNull(),
  mimeType: text('mime_type').notNull(),
  size: integer('size').notNull(),
  width: integer('width'),
  height: integer('height'),
  alt: text('alt'),
  caption: text('caption'),
  filePath: text('file_path').notNull(),
  sidecarPath: text('sidecar_path').notNull(),
  createdAt: integer('created_at', { mode: 'timestamp' }).notNull(),
  updatedAt: integer('updated_at', { mode: 'timestamp' }).notNull(),
  checksum: text('checksum'),
  tags: text('tags'), // JSON array stored as text
});

// App settings - stores application configuration
export const settings = sqliteTable('settings', {
  key: text('key').primaryKey(),
  value: text('value').notNull(),
  updatedAt: integer('updated_at', { mode: 'timestamp' }).notNull(),
});

// Post links - tracks internal links between posts
export const postLinks = sqliteTable('post_links', {
  id: text('id').primaryKey(),
  sourcePostId: text('source_post_id').notNull(), // Post containing the link
  targetPostId: text('target_post_id').notNull(), // Post being linked to
  linkText: text('link_text'), // The text of the link
  createdAt: integer('created_at', { mode: 'timestamp' }).notNull(),
});

// Post-Media links - tracks which media files are linked to which posts
export const postMedia = sqliteTable('post_media', {
  id: text('id').primaryKey(),
  projectId: text('project_id').notNull(),
  postId: text('post_id').notNull(),
  mediaId: text('media_id').notNull(),
  sortOrder: integer('sort_order').notNull().default(0), // For ordering media within a post
  createdAt: integer('created_at', { mode: 'timestamp' }).notNull(),
}, (table) => ({
  // Composite unique index: a media can only be linked once to a post
  postMediaIdx: uniqueIndex('post_media_post_media_idx').on(table.postId, table.mediaId),
}));

// Tags table - stores tag metadata with optional colors
export const tags = sqliteTable('tags', {
  id: text('id').primaryKey(),
  projectId: text('project_id').notNull(),
  name: text('name').notNull(),
  color: text('color'), // Optional hex color like #ff0000
  createdAt: integer('created_at', { mode: 'timestamp' }).notNull(),
  updatedAt: integer('updated_at', { mode: 'timestamp' }).notNull(),
}, (table) => ({
  // Composite unique index: tag name must be unique within each project
  projectNameIdx: uniqueIndex('tags_project_name_idx').on(table.projectId, table.name),
}));

// Chat conversations table - stores AI chat sessions
export const chatConversations = sqliteTable('chat_conversations', {
  id: text('id').primaryKey(),
  title: text('title').notNull(),
  model: text('model'), // Model used for this conversation
  copilotSessionId: text('copilot_session_id'), // Legacy, no longer used
  createdAt: integer('created_at', { mode: 'timestamp' }).notNull(),
  updatedAt: integer('updated_at', { mode: 'timestamp' }).notNull(),
});

// Chat messages table - stores messages within conversations
export const chatMessages = sqliteTable('chat_messages', {
  id: integer('id').primaryKey({ autoIncrement: true }),
  conversationId: text('conversation_id').notNull(),
  role: text('role', { enum: ['system', 'user', 'assistant', 'tool'] }).notNull(),
  content: text('content'),
  toolCallId: text('tool_call_id'), // For tool responses
  toolCalls: text('tool_calls'), // JSON array of tool calls
  createdAt: integer('created_at', { mode: 'timestamp' }).notNull(),
});

// Import definitions table - stores WXR import configurations
export const importDefinitions = sqliteTable('import_definitions', {
  id: text('id').primaryKey(),
  projectId: text('project_id').notNull(),
  name: text('name').notNull(),
  wxrFilePath: text('wxr_file_path'),
  uploadsFolderPath: text('uploads_folder_path'),
  lastAnalysisResult: text('last_analysis_result'), // JSON text of ImportAnalysisReport
  createdAt: integer('created_at', { mode: 'timestamp' }).notNull(),
  updatedAt: integer('updated_at', { mode: 'timestamp' }).notNull(),
});

// Types for TypeScript
export type Project = typeof projects.$inferSelect;
export type NewProject = typeof projects.$inferInsert;
export type Post = typeof posts.$inferSelect;
export type NewPost = typeof posts.$inferInsert;
export type Media = typeof media.$inferSelect;
export type NewMedia = typeof media.$inferInsert;
export type Setting = typeof settings.$inferSelect;
export type NewSetting = typeof settings.$inferInsert;
export type PostLink = typeof postLinks.$inferSelect;
export type NewPostLink = typeof postLinks.$inferInsert;
export type PostMediaLink = typeof postMedia.$inferSelect;
export type NewPostMediaLink = typeof postMedia.$inferInsert;
export type Tag = typeof tags.$inferSelect;
export type NewTag = typeof tags.$inferInsert;
export type ChatConversation = typeof chatConversations.$inferSelect;
export type NewChatConversation = typeof chatConversations.$inferInsert;
export type ChatMessage = typeof chatMessages.$inferSelect;
export type NewChatMessage = typeof chatMessages.$inferInsert;
export type ImportDefinition = typeof importDefinitions.$inferSelect;
export type NewImportDefinition = typeof importDefinitions.$inferInsert;