import assert from "node:assert/strict";
import fs from "node:fs";
import path from "node:path";
import { describe, it } from "node:test";
import Database from "better-sqlite3";

describe("project device canonical-field migration", () => {
  it("preserves canonical values while removing transitional mirror columns", () => {
    const sqlite = new Database(":memory:");
    try {
      sqlite.exec(`
        CREATE TABLE project_devices (
          id text PRIMARY KEY NOT NULL,
          power_per_unit real NOT NULL,
          simultaneity_factor real NOT NULL,
          phase_type text NOT NULL,
          cos_phi real,
          remark text,
          voltage_v real,
          installed_power_per_unit_kw real NOT NULL,
          demand_factor real NOT NULL,
          phase_count integer,
          power_factor real,
          note text
        );
        INSERT INTO project_devices VALUES (
          'device-1',
          0.25,
          0.8,
          'three_phase',
          0.95,
          'Canonical remark',
          400,
          0.25,
          0.8,
          3,
          0.95,
          'Canonical remark'
        );
      `);

      const migrationSql = fs.readFileSync(
        path.resolve(
          "src",
          "db",
          "migrations",
          "0011_project_device_canonical_fields.sql"
        ),
        "utf8"
      );
      for (const statement of migrationSql.split("--> statement-breakpoint")) {
        if (statement.trim()) {
          sqlite.exec(statement);
        }
      }

      const columns = (
        sqlite.prepare("PRAGMA table_info(project_devices)").all() as Array<{
          name: string;
        }>
      ).map((column) => column.name);
      assert.deepEqual(columns, [
        "id",
        "power_per_unit",
        "simultaneity_factor",
        "phase_type",
        "cos_phi",
        "remark",
        "voltage_v",
      ]);
      assert.deepEqual(
        sqlite
          .prepare(
            `SELECT
              power_per_unit AS powerPerUnit,
              simultaneity_factor AS simultaneityFactor,
              phase_type AS phaseType,
              cos_phi AS cosPhi,
              remark,
              voltage_v AS voltageV
            FROM project_devices
            WHERE id = ?`
          )
          .get("device-1"),
        {
          powerPerUnit: 0.25,
          simultaneityFactor: 0.8,
          phaseType: "three_phase",
          cosPhi: 0.95,
          remark: "Canonical remark",
          voltageV: 400,
        }
      );
    } finally {
      sqlite.close();
    }
  });
});