import { pool } from '../../config/db.js';

// memberUserId: se pasa solo para roles sin visibilidad total (ver dashboard/controller.js),
// restringe cada KPI a proyectos donde el usuario es miembro -- mismo criterio que
// projects/repository.js#findAll, para no mostrar conteos de proyectos que ni siquiera puede ver.
export async function summary(memberUserId) {
  const memberClause = memberUserId ? 'AND EXISTS (SELECT 1 FROM project_members pm WHERE pm.project_id = p.id AND pm.user_id = ?)' : '';
  const memberParams = memberUserId ? [memberUserId] : [];

  const [[activeProjects]] = await pool.query(
    `SELECT COUNT(*) AS c FROM projects p JOIN project_statuses ps ON ps.id = p.status_id
     WHERE ps.is_closed = 0 AND p.deleted_at IS NULL ${memberClause}`,
    memberParams
  );
  // Base del medidor de "Proyectos activos": todos menos los cancelados (los completados si
  // cuentan). El catalogo no tiene bandera de "cancelado", se identifica por nombre.
  const [[nonCancelledProjects]] = await pool.query(
    `SELECT COUNT(*) AS c FROM projects p JOIN project_statuses ps ON ps.id = p.status_id
     WHERE p.deleted_at IS NULL AND ps.name NOT LIKE 'cancel%' ${memberClause}`,
    memberParams
  );
  const [[overdueProjects]] = await pool.query(
    `SELECT COUNT(*) AS c FROM projects p JOIN project_statuses ps ON ps.id = p.status_id
     WHERE ps.is_closed = 0 AND p.deleted_at IS NULL
       AND p.estimated_end_date IS NOT NULL AND p.estimated_end_date < CURDATE() ${memberClause}`,
    memberParams
  );
  const [[dueSoonProjects]] = await pool.query(
    `SELECT COUNT(*) AS c FROM projects p JOIN project_statuses ps ON ps.id = p.status_id
     WHERE ps.is_closed = 0 AND p.deleted_at IS NULL AND p.estimated_end_date IS NOT NULL
       AND p.estimated_end_date BETWEEN CURDATE() AND DATE_ADD(CURDATE(), INTERVAL 7 DAY) ${memberClause}`,
    memberParams
  );
  // Pendientes y su base (medidor): sin actividades eliminadas ni de proyectos cancelados.
  const [[pendingActivities]] = await pool.query(
    `SELECT COUNT(*) AS c FROM activities a JOIN activity_statuses st ON st.id = a.status_id
     JOIN projects p ON p.id = a.project_id JOIN project_statuses ps ON ps.id = p.status_id
     WHERE st.is_closed = 0 AND a.deleted_at IS NULL AND p.deleted_at IS NULL
       AND ps.name NOT LIKE 'cancel%' ${memberClause}`,
    memberParams
  );
  const [[nonCancelledActivities]] = await pool.query(
    `SELECT COUNT(*) AS c FROM activities a
     JOIN projects p ON p.id = a.project_id JOIN project_statuses ps ON ps.id = p.status_id
     WHERE a.deleted_at IS NULL AND p.deleted_at IS NULL AND ps.name NOT LIKE 'cancel%' ${memberClause}`,
    memberParams
  );
  // Vencidas y su base (medidor): sin eliminadas, sin actividades canceladas ni de proyectos cancelados.
  const [[overdueActivities]] = await pool.query(
    `SELECT COUNT(*) AS c FROM activities a JOIN activity_statuses st ON st.id = a.status_id
     JOIN projects p ON p.id = a.project_id JOIN project_statuses ps ON ps.id = p.status_id
     WHERE st.is_closed = 0 AND a.deleted_at IS NULL AND p.deleted_at IS NULL AND ps.name NOT LIKE 'cancel%'
       AND a.due_date IS NOT NULL AND a.due_date < CURDATE() ${memberClause}`,
    memberParams
  );
  const [[nonCancelledActivitiesStrict]] = await pool.query(
    `SELECT COUNT(*) AS c FROM activities a JOIN activity_statuses st ON st.id = a.status_id
     JOIN projects p ON p.id = a.project_id JOIN project_statuses ps ON ps.id = p.status_id
     WHERE a.deleted_at IS NULL AND p.deleted_at IS NULL AND ps.name NOT LIKE 'cancel%'
       AND st.name NOT LIKE 'cancel%' ${memberClause}`,
    memberParams
  );
  const [[todayActivities]] = await pool.query(
    `SELECT COUNT(*) AS c FROM activities a JOIN activity_statuses st ON st.id = a.status_id
     JOIN projects p ON p.id = a.project_id
     WHERE st.is_closed = 0 AND p.deleted_at IS NULL AND a.due_date = CURDATE() ${memberClause}`,
    memberParams
  );
  const [[avgProgress]] = await pool.query(
    `SELECT AVG(progress_pct) AS avg_pct FROM projects p JOIN project_statuses ps ON ps.id = p.status_id
     WHERE ps.is_closed = 0 AND p.deleted_at IS NULL ${memberClause}`,
    memberParams
  );

  return {
    activeProjects: activeProjects.c,
    nonCancelledProjects: nonCancelledProjects.c,
    overdueProjects: overdueProjects.c,
    dueSoonProjects: dueSoonProjects.c,
    pendingActivities: pendingActivities.c,
    nonCancelledActivities: nonCancelledActivities.c,
    nonCancelledActivitiesStrict: nonCancelledActivitiesStrict.c,
    overdueActivities: overdueActivities.c,
    todayActivities: todayActivities.c,
    averageProgress: avgProgress.avg_pct === null ? 0 : Math.round(Number(avgProgress.avg_pct) * 100) / 100,
  };
}

// Mismo criterio que los KPI pendingActivities (overdueOnly=false) / overdueActivities (true).
export async function pendingActivitiesList(memberUserId, overdueOnly = false) {
  const memberClause = memberUserId ? 'AND EXISTS (SELECT 1 FROM project_members pm WHERE pm.project_id = p.id AND pm.user_id = ?)' : '';
  const overdueClause = overdueOnly ? 'AND a.due_date IS NOT NULL AND a.due_date < CURDATE()' : '';
  const [rows] = await pool.query(
    `SELECT a.id, a.code, a.name, a.due_date, a.progress_pct, p.id AS project_id, p.code AS project_code,
            p.name AS project_name, u.name AS responsible_name
     FROM activities a JOIN activity_statuses st ON st.id = a.status_id
     JOIN projects p ON p.id = a.project_id JOIN project_statuses ps ON ps.id = p.status_id
     LEFT JOIN users u ON u.id = a.responsible_user_id
     WHERE st.is_closed = 0 AND a.deleted_at IS NULL AND p.deleted_at IS NULL
       AND ps.name NOT LIKE 'cancel%' ${overdueClause} ${memberClause}
     ORDER BY (a.due_date IS NULL), a.due_date, p.code, a.code`,
    memberUserId ? [memberUserId] : []
  );
  return rows;
}

// Mismo criterio que el KPI activeProjects de summary().
export async function activeProjectsList(memberUserId) {
  const memberClause = memberUserId ? 'AND EXISTS (SELECT 1 FROM project_members pm WHERE pm.project_id = p.id AND pm.user_id = ?)' : '';
  const [rows] = await pool.query(
    `SELECT p.id, p.code, p.name, p.estimated_end_date, p.progress_pct, u.name AS owner_name, ps.name AS status_name
     FROM projects p JOIN project_statuses ps ON ps.id = p.status_id LEFT JOIN users u ON u.id = p.owner_user_id
     WHERE ps.is_closed = 0 AND p.deleted_at IS NULL ${memberClause}
     ORDER BY (p.estimated_end_date IS NULL), p.estimated_end_date, p.code`,
    memberUserId ? [memberUserId] : []
  );
  return rows;
}

// Mismo criterio que el KPI overdueProjects de summary() -- la lista y el numero nunca difieren.
export async function overdueProjectsList(memberUserId) {
  const memberClause = memberUserId ? 'AND EXISTS (SELECT 1 FROM project_members pm WHERE pm.project_id = p.id AND pm.user_id = ?)' : '';
  const [rows] = await pool.query(
    `SELECT p.id, p.code, p.name, p.estimated_end_date, p.progress_pct, u.name AS owner_name
     FROM projects p JOIN project_statuses ps ON ps.id = p.status_id LEFT JOIN users u ON u.id = p.owner_user_id
     WHERE ps.is_closed = 0 AND p.deleted_at IS NULL
       AND p.estimated_end_date IS NOT NULL AND p.estimated_end_date < CURDATE() ${memberClause}
     ORDER BY p.estimated_end_date`,
    memberUserId ? [memberUserId] : []
  );
  return rows;
}

export async function myPendingActivities(userId, memberUserId) {
  const memberClause = memberUserId ? 'AND EXISTS (SELECT 1 FROM project_members pm WHERE pm.project_id = p.id AND pm.user_id = ?)' : '';
  const params = memberUserId ? [userId, memberUserId] : [userId];
  const [rows] = await pool.query(
    `SELECT a.id, a.code, a.name, a.due_date, a.progress_pct, p.id AS project_id, p.name AS project_name
     FROM activities a JOIN activity_statuses st ON st.id = a.status_id JOIN projects p ON p.id = a.project_id
     WHERE st.is_closed = 0 AND p.deleted_at IS NULL AND a.responsible_user_id = ? ${memberClause}
     ORDER BY (a.due_date IS NULL), a.due_date LIMIT 20`,
    params
  );
  return rows;
}

export async function calendarActivities(monthStart, monthEnd, memberUserId) {
  const memberClause = memberUserId ? 'AND EXISTS (SELECT 1 FROM project_members pm WHERE pm.project_id = p.id AND pm.user_id = ?)' : '';
  const params = memberUserId ? [monthStart, monthEnd, memberUserId] : [monthStart, monthEnd];
  const [rows] = await pool.query(
    `SELECT a.id, a.code, a.name, a.due_date, a.is_milestone, a.progress_pct,
            st.is_closed AS status_is_closed, p.id AS project_id, p.name AS project_name
     FROM activities a JOIN activity_statuses st ON st.id = a.status_id JOIN projects p ON p.id = a.project_id
     WHERE a.due_date BETWEEN ? AND ? AND p.deleted_at IS NULL ${memberClause}
     ORDER BY a.due_date`,
    params
  );
  return rows;
}

export async function projectsByStatus(memberUserId) {
  const memberClause = memberUserId ? 'AND EXISTS (SELECT 1 FROM project_members pm WHERE pm.project_id = p.id AND pm.user_id = ?)' : '';
  const params = memberUserId ? [memberUserId] : [];
  const [rows] = await pool.query(
    `SELECT ps.name, ps.color, COUNT(p.id) AS total
     FROM project_statuses ps LEFT JOIN projects p ON p.status_id = ps.id AND p.deleted_at IS NULL ${memberClause}
     GROUP BY ps.id ORDER BY ps.sort_order`,
    params
  );
  return rows;
}