import { sql } from "drizzle-orm";
import { blob, check, index, integer, sqliteTable, text, uniqueIndex } from "drizzle-orm/sqlite-core";

export const admins = sqliteTable("admins", {
  id: text("id").primaryKey(),
  username: text("username").notNull(),
  usernameNorm: text("username_norm").notNull(),
  displayName: text("display_name").notNull(),
  passwordHash: text("password_hash").notNull(),
  status: text("status", { enum: ["active", "disabled"] }).notNull().default("active"),
  mustChangePassword: integer("must_change_password", { mode: "boolean" }).notNull().default(true),
  authVersion: integer("auth_version").notNull().default(1),
  version: integer("version").notNull().default(1),
  createdAt: integer("created_at").notNull(),
  createdBy: text("created_by"),
  passwordChangedAt: integer("password_changed_at"),
  lastLoginAt: integer("last_login_at"),
  disabledAt: integer("disabled_at"),
  disabledBy: text("disabled_by"),
}, (table) => [
  uniqueIndex("admins_username_norm_uq").on(table.usernameNorm),
  check("admins_status_ck", sql`${table.status} in ('active','disabled')`),
  check("admins_versions_ck", sql`${table.version} >= 1 and ${table.authVersion} >= 1`),
]);

export const sessions = sqliteTable("sessions", {
  tokenHash: text("token_hash").primaryKey(),
  adminId: text("admin_id").notNull().references(() => admins.id, { onDelete: "cascade" }),
  csrfHash: text("csrf_hash").notNull(),
  authVersion: integer("auth_version").notNull(),
  createdAt: integer("created_at").notNull(),
  lastSeenAt: integer("last_seen_at").notNull(),
  idleExpiresAt: integer("idle_expires_at").notNull(),
  absoluteExpiresAt: integer("absolute_expires_at").notNull(),
}, (table) => [index("sessions_admin_idx").on(table.adminId), index("sessions_expiry_idx").on(table.idleExpiresAt)]);

export const expenses = sqliteTable("expenses", {
  id: text("id").primaryKey(),
  paidAt: integer("paid_at").notNull(),
  amountCents: integer("amount_cents").notNull(),
  note: text("note").notNull().default(""),
  invoiceMissingReason: text("invoice_missing_reason"),
  status: text("status", { enum: ["unreimbursed", "reimbursed"] }).notNull().default("unreimbursed"),
  version: integer("version").notNull().default(1),
  createdAt: integer("created_at").notNull(),
  createdBy: text("created_by").notNull().references(() => admins.id, { onDelete: "restrict" }),
  updatedAt: integer("updated_at").notNull(),
  updatedBy: text("updated_by").notNull().references(() => admins.id, { onDelete: "restrict" }),
  reimbursedAt: integer("reimbursed_at"),
  reimbursedBy: text("reimbursed_by").references(() => admins.id, { onDelete: "restrict" }),
  deletedAt: integer("deleted_at"),
  deletedBy: text("deleted_by").references(() => admins.id, { onDelete: "restrict" }),
}, (table) => [
  index("expenses_list_idx").on(table.deletedAt, table.status, table.paidAt),
  check("expenses_amount_ck", sql`${table.amountCents} > 0 and ${table.amountCents} <= 999999999999`),
  check("expenses_status_ck", sql`${table.status} in ('unreimbursed','reimbursed')`),
  check("expenses_version_ck", sql`${table.version} >= 1`),
]);

export const attachments = sqliteTable("attachments", {
  id: text("id").primaryKey(),
  expenseId: text("expense_id").notNull().references(() => expenses.id, { onDelete: "cascade" }),
  kind: text("kind", { enum: ["payment_proof", "invoice"] }).notNull(),
  storagePath: text("storage_path").notNull(),
  originalName: text("original_name").notNull(),
  mimeType: text("mime_type").notNull(),
  sizeBytes: integer("size_bytes").notNull(),
  sha256: text("sha256").notNull(),
  createdAt: integer("created_at").notNull(),
  createdBy: text("created_by").notNull().references(() => admins.id, { onDelete: "restrict" }),
}, (table) => [
  uniqueIndex("attachments_path_uq").on(table.storagePath),
  index("attachments_expense_idx").on(table.expenseId),
  check("attachments_kind_ck", sql`${table.kind} in ('payment_proof','invoice')`),
  check("attachments_size_ck", sql`${table.sizeBytes} > 0`),
]);

export const auditEvents = sqliteTable("audit_events", {
  id: integer("id").primaryKey({ autoIncrement: true }),
  occurredAt: integer("occurred_at").notNull(),
  requestId: text("request_id").notNull(),
  actorAdminId: text("actor_admin_id"),
  actorUsername: text("actor_username"),
  action: text("action").notNull(),
  targetType: text("target_type").notNull(),
  targetId: text("target_id"),
  outcome: text("outcome", { enum: ["success", "denied", "failure"] }).notNull(),
  beforeJson: text("before_json"),
  afterJson: text("after_json"),
  metadataJson: text("metadata_json"),
}, (table) => [index("audit_time_idx").on(table.occurredAt), index("audit_target_idx").on(table.targetType, table.targetId)]);

export const systemSettings = sqliteTable("system_settings", {
  key: text("key").primaryKey(),
  value: text("value").notNull(),
  updatedAt: integer("updated_at").notNull(),
});

export const exportJobs = sqliteTable("export_jobs", {
  id: text("id").primaryKey(),
  adminId: text("admin_id").notNull().references(() => admins.id, { onDelete: "cascade" }),
  sessionHash: text("session_hash").notNull(),
  status: text("status", { enum: ["queued", "building", "ready", "failed", "expired"] }).notNull(),
  selectionJson: text("selection_json").notNull(),
  snapshotJson: text("snapshot_json").notNull(),
  filePath: text("file_path"),
  fileName: text("file_name").notNull(),
  sizeBytes: integer("size_bytes"),
  sha256: text("sha256"),
  errorMessage: text("error_message"),
  createdAt: integer("created_at").notNull(),
  readyAt: integer("ready_at"),
  expiresAt: integer("expires_at").notNull(),
}, (table) => [index("exports_expiry_idx").on(table.expiresAt), index("exports_session_idx").on(table.sessionHash)]);

export const loginAttempts = sqliteTable("login_attempts", {
  keyHash: text("key_hash").primaryKey(),
  windowStart: integer("window_start").notNull(),
  failures: integer("failures").notNull(),
  blockedUntil: integer("blocked_until"),
});

export const fileDeletions = sqliteTable("file_deletions", {
  id: text("id").primaryKey(),
  storagePath: text("storage_path").notNull(),
  reason: text("reason").notNull(),
  status: text("status", { enum: ["pending", "complete", "failed"] }).notNull().default("pending"),
  attempts: integer("attempts").notNull().default(0),
  lastError: text("last_error"),
  createdAt: integer("created_at").notNull(),
  completedAt: integer("completed_at"),
}, (table) => [index("file_deletions_status_idx").on(table.status)]);

export const updateJobs = sqliteTable("update_jobs", {
  id: text("id").primaryKey(),
  adminId: text("admin_id").references(() => admins.id, { onDelete: "set null" }),
  sessionHash: text("session_hash"),
  requestId: text("request_id"),
  operation: text("operation", { enum: ["download", "apply"] }).notNull().default("apply"),
  status: text("status", { enum: ["queued", "downloading", "verifying", "staged", "backing_up", "applying", "completed", "failed", "cancelled"] }).notNull(),
  version: text("version").notNull(),
  platform: text("platform").notNull(),
  releaseUrl: text("release_url"),
  assetName: text("asset_name"),
  assetUrl: text("asset_url").notNull(),
  expectedSha256: text("expected_sha256"),
  actualSha256: text("actual_sha256"),
  downloadPath: text("download_path"),
  backupPath: text("backup_path"),
  sizeBytes: integer("size_bytes"),
  downloadedBytes: integer("downloaded_bytes"),
  downloadStartedAt: integer("download_started_at"),
  downloadSpeedBps: integer("download_speed_bps"),
  errorMessage: text("error_message"),
  createdAt: integer("created_at").notNull(),
  requestedAt: integer("requested_at"),
  startedAt: integer("started_at"),
  updatedAt: integer("updated_at").notNull(),
  completedAt: integer("completed_at"),
}, (table) => [
  index("update_jobs_status_idx").on(table.status, table.createdAt),
  index("update_jobs_admin_idx").on(table.adminId, table.createdAt),
  index("update_jobs_session_idx").on(table.sessionHash),
]);