#!/bin/bash
#
# update-costs.sh — Update the landing page with latest project cost
# estimates from the impact log.
#
# Reads .claude/impact/impact-log.jsonl, takes the latest snapshot per
# session, sums totals, and updates index.html in place.
#
# Usage: ./update-costs.sh
#
# Run after each conversation or as a cron job.

set -euo pipefail

IMPACT_LOG="/home/claude/claude-dir/.claude/impact/impact-log.jsonl"

if [ ! -f "$IMPACT_LOG" ]; then
    echo "No impact log found at $IMPACT_LOG"
    exit 1
fi

python3 << 'PYEOF'
import json, re, sys

IMPACT_LOG = "/home/claude/claude-dir/.claude/impact/impact-log.jsonl"
LANDING_PAGE = "/home/claude/claude-dir/www/index.html"

# Read all entries, keep latest per session
sessions = {}
with open(IMPACT_LOG) as f:
    for line in f:
        line = line.strip()
        if not line:
            continue
        d = json.loads(line)
        sid = d.get("session_id", "")
        if sid == "test-123" or not sid:
            continue
        ts = d.get("timestamp", "")
        if sid not in sessions or ts > sessions[sid]["timestamp"]:
            sessions[sid] = d

if not sessions:
    print("No sessions found in impact log")
    sys.exit(0)

# Sum across sessions
n = len(sessions)
total_energy = sum(d.get("energy_wh", 0) for d in sessions.values())
total_co2 = sum(d.get("co2_g", 0) for d in sessions.values())
total_cost_cents = sum(d.get("cost_cents", 0) for d in sessions.values())

# Format cost
if total_cost_cents >= 100:
    cost_display = f"${total_cost_cents // 100}"
else:
    cost_display = f"{total_cost_cents}c"

# Pluralize
session_word = "session" if n == 1 else "sessions"

# Build replacement paragraph
new_para = (
    f"How this was made:</strong>\n"
    f"      This project was developed by a human\n"
    f"      directing <a href=\"https://claude.ai\">Claude</a> (Anthropic's AI assistant)\n"
    f"      across multiple conversations. The methodology was applied to itself:\n"
    f"      across {n} tracked {session_word}, the project has consumed\n"
    f"      ~{total_energy} Wh of energy, ~{total_co2}g of CO2, and ~{cost_display} in\n"
    f"      compute. Whether it produces enough value to justify those costs depends\n"
    f"      on whether anyone finds it useful. We are\n"
    f'      <a href="/forge/claude/ai-conversation-impact/src/branch/main/plans/measure-project-impact.md">tracking that question</a>.\n'
    f"    </div>"
)

# Read and replace
with open(LANDING_PAGE) as f:
    html = f.read()

pattern = r"How this was made:</strong>.*?</div>"
new_html = re.sub(pattern, new_para, html, flags=re.DOTALL)

with open(LANDING_PAGE, "w") as f:
    f.write(new_html)

print(f"Updated: {n} {session_word}, {total_energy} Wh, {total_co2}g CO2, {cost_display}")
PYEOF