import { eq, or, type Db, agents } from '@mosaic/db';

export type Agent = typeof agents.$inferSelect;
export type NewAgent = typeof agents.$inferInsert;

export function createAgentsRepo(db: Db) {
  return {
    async findAll(): Promise<Agent[]> {
      return db.select().from(agents);
    },

    async findById(id: string): Promise<Agent | undefined> {
      const rows = await db.select().from(agents).where(eq(agents.id, id));
      return rows[0];
    },

    async findByName(name: string): Promise<Agent | undefined> {
      const rows = await db.select().from(agents).where(eq(agents.name, name));
      return rows[0];
    },

    async findByProject(projectId: string): Promise<Agent[]> {
      return db.select().from(agents).where(eq(agents.projectId, projectId));
    },

    async findSystem(): Promise<Agent[]> {
      return db.select().from(agents).where(eq(agents.isSystem, true));
    },

    async findAccessible(ownerId: string): Promise<Agent[]> {
      return db
        .select()
        .from(agents)
        .where(or(eq(agents.ownerId, ownerId), eq(agents.isSystem, true)));
    },

    async create(data: NewAgent): Promise<Agent> {
      const rows = await db.insert(agents).values(data).returning();
      return rows[0]!;
    },

    async update(id: string, data: Partial<NewAgent>): Promise<Agent | undefined> {
      const rows = await db
        .update(agents)
        .set({ ...data, updatedAt: new Date() })
        .where(eq(agents.id, id))
        .returning();
      return rows[0];
    },

    async remove(id: string): Promise<boolean> {
      const rows = await db.delete(agents).where(eq(agents.id, id)).returning();
      return rows.length > 0;
    },
  };
}

export type AgentsRepo = ReturnType<typeof createAgentsRepo>;