const db = require("../db");
const { parseWeekdaysValue, checkDriverConflict } = require("../lib/schedule");
const { reportError } = require("../lib/report-error");

// Driver repository methods (PostgreSQL mode).

async function listDrivers(req) {
  try {
    const result = await db.query(`
      SELECT id, firstname, lastname, email, phone, job, joined, status
      FROM workers.employees
      WHERE status = 'active'
      ORDER BY firstname, lastname ASC
    `);

    // Get all schedules to check for conflicts
    const schedulesResult = await db.query(
      `SELECT * FROM schedules WHERE status IN ('planned', 'active')`,
    );
    const schedules = schedulesResult.rows.map((row) => ({
      ...row,
      weekdays: parseWeekdaysValue(row.weekdays),
    }));

    return {
      statusCode: 200,
      body: {
        drivers: result.rows.map((row) => {
          const driverId = row.id;
          const now = new Date();
          const tomorrow = new Date(now);
          tomorrow.setDate(tomorrow.getDate() + 1);
          const isAvailable = !checkDriverConflict(
            driverId,
            now.toISOString(),
            tomorrow.toISOString(),
            [],
            schedules,
          );

          return {
            id: row.id,
            name: (
              String(row.firstname || "") +
              " " +
              String(row.lastname || "")
            ).trim(),
            email: row.email,
            phone: row.phone,
            job: row.job,
            joined: row.joined,
            status: row.status,
            available: isAvailable,
          };
        }),
      },
    };
  } catch (err) {
    console.error(err);
    reportError({ partofservice: `${req.method} ${req.originalUrl}`, error: err.stack || err.message });
    return { statusCode: 500, body: { error: "internal_error", details: err.message } };
  }
}

async function listShiftDrivers(req) {
  try {
    const result = await db.query(`
      SELECT id, usercode
      FROM workers.users
      ORDER BY usercode ASC
    `);
    return {
      statusCode: 200,
      body: {
        drivers: result.rows.map((row) => ({
          id: Number(row.id),
          name: String(row.usercode),
        })),
      },
    };
  } catch (err) {
    console.error("GET /admin/shift-drivers error:", err);
    reportError({ partofservice: "GET /admin/shift-drivers", error: err.stack || err.message });
    return { statusCode: 500, body: { error: "internal_error" } };
  }
}

module.exports = { listDrivers, listShiftDrivers };