import {
  boolean,
  index,
  integer,
  jsonb,
  pgTable,
  text,
  timestamp,
  uniqueIndex,
  uuid,
} from "drizzle-orm/pg-core";

import type { MessageAttachment } from "../../types/messaging.js";
import { organization, user } from "./auth.js";

// A conversation between clinic staff, scoped to a clinic (organization). `name`
// is set for named/group conversations; a 1:1 DM leaves it null and the display
// name is derived from the other participant.
export const conversations = pgTable(
  "conversations",
  {
    id: uuid("id").primaryKey().defaultRandom(),
    organizationId: text("organization_id")
      .notNull()
      .references(() => organization.id, { onDelete: "cascade" }),
    name: text("name"),
    isGroup: boolean("is_group").notNull().default(false),
    createdBy: text("created_by").references(() => user.id, {
      onDelete: "set null",
    }),
    createdAt: timestamp("created_at").defaultNow().notNull(),
    // Bumped on each new message so the inbox can sort by recency.
    updatedAt: timestamp("updated_at")
      .defaultNow()
      .$onUpdate(() => new Date())
      .notNull(),
  },
  (t) => [index("conversations_org_idx").on(t.organizationId)],
);

export const conversationParticipants = pgTable(
  "conversation_participants",
  {
    id: uuid("id").primaryKey().defaultRandom(),
    conversationId: uuid("conversation_id")
      .notNull()
      .references(() => conversations.id, { onDelete: "cascade" }),
    userId: text("user_id")
      .notNull()
      .references(() => user.id, { onDelete: "cascade" }),
    // Last time this participant read the conversation; drives unread state.
    lastReadAt: timestamp("last_read_at"),
  },
  (t) => [
    uniqueIndex("conv_participant_uidx").on(t.conversationId, t.userId),
    index("conv_participant_user_idx").on(t.userId),
  ],
);

export const messages = pgTable(
  "messages",
  {
    id: uuid("id").primaryKey().defaultRandom(),
    conversationId: uuid("conversation_id")
      .notNull()
      .references(() => conversations.id, { onDelete: "cascade" }),
    senderId: text("sender_id")
      .notNull()
      .references(() => user.id, { onDelete: "cascade" }),
    body: text("body").notNull().default(""),
    // File references / shared appointment snapshots. Null when none.
    attachments: jsonb("attachments").$type<MessageAttachment[]>(),
    createdAt: timestamp("created_at").defaultNow().notNull(),
  },
  (t) => [index("messages_conv_idx").on(t.conversationId, t.createdAt)],
);

// Stored uploaded files referenced by a message attachment. Bytes are kept as
// base64 text (simple, dependency-free; fine for the app's scale). Org-scoped.
export const messageAttachments = pgTable(
  "message_attachments",
  {
    id: uuid("id").primaryKey().defaultRandom(),
    organizationId: text("organization_id")
      .notNull()
      .references(() => organization.id, { onDelete: "cascade" }),
    uploaderId: text("uploader_id").references(() => user.id, {
      onDelete: "set null",
    }),
    fileName: text("file_name").notNull(),
    mimeType: text("mime_type").notNull(),
    size: integer("size").notNull(),
    data: text("data").notNull(),
    createdAt: timestamp("created_at").defaultNow().notNull(),
  },
  (t) => [index("message_attachments_org_idx").on(t.organizationId)],
);