/* eslint-disable */
/**
 * Migration: add `ai_status` + `ai_error` + `ai_processed_at` to quotes.
 *
 * Why this exists
 * ───────────────
 * The quote-intake pipeline is being split in two:
 *
 *   1. Ingestion (fast) — accepts the raw email payload, creates a quote
 *      row with `ai_status = "pending"`, uploads attachments. Returns
 *      immediately so n8n's webhook doesn't time out on a slow AI call.
 *
 *   2. AI processing (async) — a separate cron endpoint scans quotes
 *      with `ai_status = "pending"` or `"failed"`, runs Claude against
 *      the body + attachments, writes `quote_items`, flips status.
 *
 * Three new fields are needed on `quotes`:
 *
 *   ai_status         select   single-select lifecycle flag
 *                                pending → processing → complete
 *                                              ↓
 *                                           failed (retry-eligible)
 *                                not_applicable for manually-created
 *                                quotes that never went through email.
 *
 *   ai_error          text     Last AI error message — surfaced in the
 *                              operator UI when ai_status='failed'.
 *
 *   ai_processed_at   date     Timestamp of the most recent AI run, for
 *                              the "last attempted" badge in the UI.
 *
 * Why this reads pb-exports/pb_schema-2.json
 * ───────────────────────────────────────────
 * PB 0.26's `collections.getOne()` strips the `options.values` array
 * from select fields created under PB 0.22 or earlier — they come
 * back as `options: undefined`. Worse, when re-PUTting the fields
 * array, PB validates EVERY field (not just the new ones), so any
 * existing select field with a missing `values` array kills the whole
 * update with `values: validation_required`.
 *
 * The schema export is the only place the full definition survives.
 * We source the field list from the export, append our additions,
 * and PUT the whole array back. Select fields in PB 0.26 on this
 * instance still accept the legacy PB 0.22 shape (`values` at the
 * top level of the field, not nested under `options`), so we pass
 * them through unchanged.
 *
 * Schema
 * ──────
 *   quotes.ai_status         select (new, nullable, single-select)
 *   quotes.ai_error          text  (new, max 4900, nullable)
 *   quotes.ai_processed_at   date  (new, nullable)
 *
 * Idempotent — safe to re-run. Subsequent runs print "already present,
 * skipping."
 *
 * Run with:
 *   npx tsx scripts/migrations/2026-08-08-add-quotes-ai-status.ts
 */
import PocketBase from "pocketbase";
import { readFileSync } from "node:fs";
import { resolve } from "node:path";

function loadEnvFile(name: string) {
  try {
    const raw = readFileSync(resolve(process.cwd(), name), "utf8");
    for (const line of raw.split("\n")) {
      const trimmed = line.trim();
      if (!trimmed || trimmed.startsWith("#")) continue;
      const m = trimmed.match(/^([A-Z0-9_]+)\s*=\s*(.+)$/i);
      if (m && !process.env[m[1]]) {
        process.env[m[1]] = m[2].replace(/^["']|["']$/g, "").trim();
      }
    }
  } catch {
    // missing file — fine
  }
}
loadEnvFile(".env");
loadEnvFile(".env.local");

const AI_STATUS_VALUES = [
  "pending",
  "processing",
  "complete",
  "failed",
  "not_applicable",
] as const;

const SCHEMA_EXPORT_PATH = resolve(
  process.cwd(),
  "pb-exports",
  "pb_schema-2.json",
);

async function main() {
  const url = process.env.NEXT_PUBLIC_POCKETBASE_URL;
  const email = process.env.PB_ADMIN_EMAIL;
  const password = process.env.PB_ADMIN_PASSWORD;
  if (!url || !email || !password) {
    throw new Error(
      "Set NEXT_PUBLIC_POCKETBASE_URL, PB_ADMIN_EMAIL and PB_ADMIN_PASSWORD.",
    );
  }

  // ─── 1. Load the full schema from the export so existing select
  //         field values aren't lost when we PUT the whole array back. ──
  let schemaExport: Array<Record<string, unknown>>;
  try {
    schemaExport = JSON.parse(readFileSync(SCHEMA_EXPORT_PATH, "utf8")) as Array<
      Record<string, unknown>
    >;
  } catch {
    throw new Error(
      `Could not read ${SCHEMA_EXPORT_PATH}. The export is the source of truth for select field values.`,
    );
  }

  const quotesExport = schemaExport.find((c) => c.name === "quotes");
  if (!quotesExport) {
    throw new Error('Schema export does not contain a "quotes" collection.');
  }
  const existingFields = (quotesExport.fields ?? []) as Array<
    Record<string, unknown>
  >;
  const existingNames = new Set(existingFields.map((f) => f.name as string));

  const pb = new PocketBase(url);
  await pb.admins.authWithPassword(email, password);
  const quotesLive = await pb.collections.getOne("quotes");
  const existingIndexes = (quotesLive.indexes ?? []) as string[];

  // ─── 2. Add the three fields ────────────────────────────────────
  const additions: Array<Record<string, unknown>> = [];

  if (!existingNames.has("ai_status")) {
    additions.push({
      name: "ai_status",
      type: "select",
      required: false,
      presentable: false,
      system: false,
      hidden: false,
      help: "AI processing state for email-intake quotes. pending|processing|complete|failed|not_applicable",
      // PB 0.26 on this instance still accepts the legacy PB 0.22
      // shape (`values` at the top level) for select fields. Keeping
      // it consistent with the existing `status` and
      // `company_letterhead` fields.
      values: [...AI_STATUS_VALUES],
      maxSelect: 1,
    });
  } else {
    console.log("quotes.ai_status already present, skipping.");
  }

  if (!existingNames.has("ai_error")) {
    additions.push({
      name: "ai_error",
      type: "text",
      required: false,
      presentable: false,
      system: false,
      hidden: false,
      help: "Last AI error message — surfaced in the operator UI when ai_status='failed'.",
      options: { max: 4900, min: 0, pattern: "" },
    });
  } else {
    console.log("quotes.ai_error already present, skipping.");
  }

  if (!existingNames.has("ai_processed_at")) {
    additions.push({
      name: "ai_processed_at",
      type: "date",
      required: false,
      presentable: false,
      system: false,
      hidden: false,
      help: "Timestamp of the most recent AI run.",
      options: { min: "", max: "" },
    });
  } else {
    console.log("quotes.ai_processed_at already present, skipping.");
  }

  if (additions.length === 0) {
    console.log("All three AI fields already present on quotes — nothing to add.");
  } else {
    // Pass the existing fields through unchanged (they're already in
    // the shape PB accepts on this instance). Append our additions.
    await pb.collections.update(quotesLive.id, {
      fields: [...existingFields, ...additions],
    });
    console.log(
      `Added quotes fields: ${additions.map((f) => f.name).join(", ")}`,
    );
  }

  // ─── 3. Index on `ai_status` ─────────────────────────────────────
  // The AI processor's main query is:
  //   ai_status = "pending" OR ai_status = "failed"
  // Without an index this is a full table scan on every cron tick.
  // ~8.5k quotes today; still cheap, but the index is cheap insurance
  // against growth and matches the `idx_quotes_status` pattern from
  // the 2026-08-04 quotes-status-index migration.
  const INDEX_NAME = "idx_quotes_ai_status";
  const INDEX_SQL = `CREATE INDEX \`${INDEX_NAME}\` ON \`quotes\` (\`ai_status\`)`;
  if (!existingIndexes.includes(INDEX_SQL)) {
    await pb.collections.update(quotesLive.id, {
      indexes: [...existingIndexes, INDEX_SQL],
    });
    console.log("Added quotes.ai_status index (idx_quotes_ai_status).");
  } else {
    console.log("quotes.ai_status index already present, skipping.");
  }

  console.log("\nMigration complete.");
  console.log(
    "Next step: implement src/lib/server/quotes-from-email-service.ts (ingestion, sets ai_status='pending'),",
  );
  console.log(
    "then src/lib/server/quotes-ai-processor.ts (background processor, flips ai_status='complete').",
  );
}

main().catch((error) => {
  console.error("[add-quotes-ai-status] failed:", error);
  process.exit(1);
});