#!/usr/bin/env bash
# gstack-builder-profile — read builder profile and output structured summary
#
# Reads ~/.gstack/builder-profile.jsonl (append-only session log from /office-hours).
# Outputs KEY: VALUE pairs for the template to consume. Computes tier, accumulated
# signals, cross-project detection, nudge eligibility, and resource dedup.
#
# Single source of truth for all closing state. No separate config keys or logs.
#
# Exit 0 with defaults if no profile exists (first-time user = introduction tier).
set -euo pipefail

GSTACK_HOME="${GSTACK_HOME:-$HOME/.gstack}"
PROFILE_FILE="$GSTACK_HOME/builder-profile.jsonl"

# Graceful default: no profile = introduction tier
if [ ! -f "$PROFILE_FILE" ] || [ ! -s "$PROFILE_FILE" ]; then
  echo "SESSION_COUNT: 0"
  echo "TIER: introduction"
  echo "LAST_PROJECT:"
  echo "LAST_ASSIGNMENT:"
  echo "LAST_DESIGN_TITLE:"
  echo "DESIGN_COUNT: 0"
  echo "DESIGN_TITLES: []"
  echo "ACCUMULATED_SIGNALS:"
  echo "TOTAL_SIGNAL_COUNT: 0"
  echo "CROSS_PROJECT: false"
  echo "NUDGE_ELIGIBLE: false"
  echo "RESOURCES_SHOWN:"
  echo "RESOURCES_SHOWN_COUNT: 0"
  echo "TOPICS:"
  exit 0
fi

# Use bun for JSON parsing (same pattern as gstack-learnings-search).
# Fallback to defaults if bun is unavailable.
cat "$PROFILE_FILE" 2>/dev/null | bun -e "
const lines = (await Bun.stdin.text()).trim().split('\n').filter(Boolean);
const entries = [];
for (const line of lines) {
  try { entries.push(JSON.parse(line)); } catch {}
}

const count = entries.length;

// Tier computation
let tier = 'introduction';
if (count >= 8) tier = 'inner_circle';
else if (count >= 4) tier = 'regular';
else if (count >= 1) tier = 'welcome_back';

// Last session data
const last = entries[count - 1] || {};
const prev = entries[count - 2] || {};
const crossProject = prev.project_slug && last.project_slug
  ? prev.project_slug !== last.project_slug
  : false;

// Design docs
const designs = entries
  .map(e => e.design_doc || '')
  .filter(Boolean);
const designTitles = entries
  .map(e => {
    const doc = e.design_doc || '';
    // Extract title from path: ...-design-DATETIME.md -> use the entry's topic or project
    return doc ? (e.project_slug || 'unknown') : '';
  })
  .filter(Boolean);

// Accumulated signals
const signalCounts = {};
let totalSignals = 0;
for (const e of entries) {
  for (const s of (e.signals || [])) {
    signalCounts[s] = (signalCounts[s] || 0) + 1;
    totalSignals++;
  }
}
const signalStr = Object.entries(signalCounts)
  .map(([k, v]) => k + ':' + v)
  .join(',');

// Nudge eligibility: builder-mode + 5+ signals across 3+ sessions
const builderSessions = entries.filter(e => e.mode !== 'startup').length;
const nudgeEligible = builderSessions >= 3 && totalSignals >= 5;

// Resources shown (aggregate all)
const allResources = new Set();
for (const e of entries) {
  for (const url of (e.resources_shown || [])) {
    allResources.add(url);
  }
}

// Topics (aggregate all)
const allTopics = new Set();
for (const e of entries) {
  for (const t of (e.topics || [])) {
    allTopics.add(t);
  }
}

console.log('SESSION_COUNT: ' + count);
console.log('TIER: ' + tier);
console.log('LAST_PROJECT: ' + (last.project_slug || ''));
console.log('LAST_ASSIGNMENT: ' + (last.assignment || ''));
console.log('LAST_DESIGN_TITLE: ' + (last.design_doc || ''));
console.log('DESIGN_COUNT: ' + designs.length);
console.log('DESIGN_TITLES: ' + JSON.stringify(designTitles));
console.log('ACCUMULATED_SIGNALS: ' + signalStr);
console.log('TOTAL_SIGNAL_COUNT: ' + totalSignals);
console.log('CROSS_PROJECT: ' + crossProject);
console.log('NUDGE_ELIGIBLE: ' + nudgeEligible);
console.log('RESOURCES_SHOWN: ' + Array.from(allResources).join(','));
console.log('RESOURCES_SHOWN_COUNT: ' + allResources.size);
console.log('TOPICS: ' + Array.from(allTopics).join(','));
" 2>/dev/null || {
  # Fallback if bun is unavailable
  echo "SESSION_COUNT: 0"
  echo "TIER: introduction"
  echo "LAST_PROJECT:"
  echo "LAST_ASSIGNMENT:"
  echo "LAST_DESIGN_TITLE:"
  echo "DESIGN_COUNT: 0"
  echo "DESIGN_TITLES: []"
  echo "ACCUMULATED_SIGNALS:"
  echo "TOTAL_SIGNAL_COUNT: 0"
  echo "CROSS_PROJECT: false"
  echo "NUDGE_ELIGIBLE: false"
  echo "RESOURCES_SHOWN:"
  echo "RESOURCES_SHOWN_COUNT: 0"
  echo "TOPICS:"
}