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

export const operators = pgTable(
  "operators",
  {
    id: uuid("id").primaryKey().defaultRandom(),
    username: text("username").notNull(),
    passwordHash: text("password_hash"),
    displayName: text("display_name").notNull(),
    role: text("role").notNull().default("admin"),
    defaultTimezone: text("default_timezone").notNull().default("Asia/Kuala_Lumpur"),
    createdAt: timestamp("created_at", { withTimezone: true }).notNull().defaultNow(),
  },
  (t) => ({
    usernameUnique: uniqueIndex("operators_username_uq").on(sql`lower(${t.username})`),
  }),
);

export const whatsappAccounts = pgTable(
  "whatsapp_accounts",
  {
    id: uuid("id").primaryKey().defaultRandom(),
    operatorId: uuid("operator_id").notNull().references(() => operators.id),
    label: text("label").notNull(),
    phoneNumber: text("phone_number"),
    status: text("status").notNull().default("pending"),
    lastConnectedAt: timestamp("last_connected_at", { withTimezone: true }),
    lastQrAt: timestamp("last_qr_at", { withTimezone: true }),
    lastQrPng: text("last_qr_png"),
    createdAt: timestamp("created_at", { withTimezone: true }).notNull().defaultNow(),
  },
  (t) => ({
    operatorLabelUnique: uniqueIndex("whatsapp_accounts_operator_label_uq").on(t.operatorId, t.label),
  }),
);

export const whatsappGroups = pgTable(
  "whatsapp_groups",
  {
    id: uuid("id").primaryKey().defaultRandom(),
    accountId: uuid("account_id").notNull().references(() => whatsappAccounts.id, { onDelete: "cascade" }),
    waGroupJid: text("wa_group_jid").notNull(),
    name: text("name").notNull(),
    participantCount: integer("participant_count").notNull().default(0),
    isArchived: boolean("is_archived").notNull().default(false),
    lastSyncedAt: timestamp("last_synced_at", { withTimezone: true }).notNull().defaultNow(),
  },
  (t) => ({
    accountJidUnique: uniqueIndex("whatsapp_groups_account_jid_uq").on(t.accountId, t.waGroupJid),
  }),
);

export const mediaFiles = pgTable("media_files", {
  id: uuid("id").primaryKey().defaultRandom(),
  operatorId: uuid("operator_id").notNull().references(() => operators.id),
  filenameOriginal: text("filename_original").notNull(),
  mimeType: text("mime_type").notNull(),
  sizeBytes: bigint("size_bytes", { mode: "number" }).notNull(),
  sha256: text("sha256").notNull(),
  storagePath: text("storage_path").notNull(),
  createdAt: timestamp("created_at", { withTimezone: true }).notNull().defaultNow(),
});

export const reminders = pgTable("reminders", {
  id: uuid("id").primaryKey().defaultRandom(),
  accountId: uuid("account_id").notNull().references(() => whatsappAccounts.id, { onDelete: "cascade" }),
  name: text("name").notNull(),
  scheduleKind: text("schedule_kind").notNull(),
  scheduledAt: timestamp("scheduled_at", { withTimezone: true }),
  rrule: text("rrule"),
  timezone: text("timezone").notNull(),
  endsAt: timestamp("ends_at", { withTimezone: true }),
  maxRuns: integer("max_runs"),
  status: text("status").notNull().default("active"),
  createdBy: uuid("created_by").notNull().references(() => operators.id),
  createdAt: timestamp("created_at", { withTimezone: true }).notNull().defaultNow(),
  updatedAt: timestamp("updated_at", { withTimezone: true }).notNull().defaultNow(),
  lastFiredAt: timestamp("last_fired_at", { withTimezone: true }),
  // Delivery window (operator timezone). End hour is enforced at runtime
  // by fire-reminder when window enforcement lands; start hour is documented
  // here but not gated in v1.
  deliveryWindowStartHour: integer("delivery_window_start_hour").notNull().default(6),
  deliveryWindowEndHour: integer("delivery_window_end_hour").notNull().default(18),
});

export const reminderTargets = pgTable(
  "reminder_targets",
  {
    reminderId: uuid("reminder_id").notNull().references(() => reminders.id, { onDelete: "cascade" }),
    groupId: uuid("group_id").notNull().references(() => whatsappGroups.id),
    position: integer("position").notNull().default(0),
  },
  (t) => ({
    pk: primaryKey({ columns: [t.reminderId, t.groupId] }),
  }),
);

export const reminderMessages = pgTable("reminder_messages", {
  id: uuid("id").primaryKey().defaultRandom(),
  reminderId: uuid("reminder_id").notNull().references(() => reminders.id, { onDelete: "cascade" }),
  position: integer("position").notNull(),
  kind: text("kind").notNull(),
  textContent: text("text_content"),
  mediaId: uuid("media_id").references(() => mediaFiles.id),
});

export const reminderRuns = pgTable("reminder_runs", {
  id: uuid("id").primaryKey().defaultRandom(),
  // Nullable + ON DELETE SET NULL: deleting a reminder must NOT erase its
  // run history. The accompanying snapshot fields below preserve enough
  // context to keep history rows readable.
  reminderId: uuid("reminder_id").references(() => reminders.id, { onDelete: "set null" }),
  reminderName: text("reminder_name"),
  firedAt: timestamp("fired_at", { withTimezone: true }).notNull().defaultNow(),
  status: text("status").notNull(),
  errorSummary: text("error_summary"),
  // Soft-archive: non-null hides the row from the default activity
  // listing but keeps it queryable under a dedicated "Archived" filter.
  // The user can restore (unarchive) later or hard-delete from there.
  archivedAt: timestamp("archived_at", { withTimezone: true }),
});

export const reminderRunTargets = pgTable("reminder_run_targets", {
  id: uuid("id").primaryKey().defaultRandom(),
  runId: uuid("run_id").notNull().references(() => reminderRuns.id, { onDelete: "cascade" }),
  // Nullable + ON DELETE SET NULL: unpair/delete-account wipes the
  // associated whatsapp_groups rows but the historical fan-out record
  // ("we tried to send to this group, here's the result") must survive.
  // The accompanying snapshot field below preserves the readable label.
  groupId: uuid("group_id").references(() => whatsappGroups.id, { onDelete: "set null" }),
  groupLabel: text("group_label"),
  status: text("status").notNull(),
  waMessageId: text("wa_message_id"),
  error: text("error"),
  latencyMs: integer("latency_ms"),
});

export const auditLog = pgTable("audit_log", {
  id: uuid("id").primaryKey().defaultRandom(),
  operatorId: uuid("operator_id").references(() => operators.id),
  source: text("source").notNull(),
  action: text("action").notNull(),
  targetType: text("target_type"),
  targetId: uuid("target_id"),
  payload: jsonb("payload").notNull().default({}),
  createdAt: timestamp("created_at", { withTimezone: true }).notNull().defaultNow(),
});

export const authSessions = pgTable("auth_sessions", {
  id: uuid("id").primaryKey().defaultRandom(),
  operatorId: uuid("operator_id").notNull().references(() => operators.id),
  tokenHash: text("token_hash").notNull().unique(),
  createdAt: timestamp("created_at", { withTimezone: true }).notNull().defaultNow(),
  expiresAt: timestamp("expires_at", { withTimezone: true }).notNull(),
  lastUsedAt: timestamp("last_used_at", { withTimezone: true }).notNull().defaultNow(),
  ipAddress: inet("ip_address"),
  userAgent: text("user_agent"),
});

export const cacheEntries = pgTable("cache_entries", {
  key: text("key").primaryKey(),
  value: jsonb("value").notNull(),
  expiresAt: timestamp("expires_at", { withTimezone: true }).notNull(),
});

export const rateLimitBuckets = pgTable("rate_limit_buckets", {
  key: text("key").primaryKey(),
  windowStart: timestamp("window_start", { withTimezone: true }).notNull(),
  count: integer("count").notNull(),
  expiresAt: timestamp("expires_at", { withTimezone: true }).notNull(),
});

export type Operator = typeof operators.$inferSelect;
export type NewOperator = typeof operators.$inferInsert;
export type WhatsappAccount = typeof whatsappAccounts.$inferSelect;
export type NewWhatsappAccount = typeof whatsappAccounts.$inferInsert;
export type WhatsappGroup = typeof whatsappGroups.$inferSelect;
export type NewWhatsappGroup = typeof whatsappGroups.$inferInsert;
export type AuditLogEntry = typeof auditLog.$inferSelect;
export type NewAuditLogEntry = typeof auditLog.$inferInsert;