#!/usr/bin/env bash
# Display the Claude request history for this project.
#
# Usage:
#   .claude/scripts/show-history.sh [--filter open|merged|pending] [--last N] [--json]

set -euo pipefail

LOG_FILE=".claude/request-log.jsonl"
FILTER=""
LAST=0
JSON_MODE=false

while [[ $# -gt 0 ]]; do
  case "$1" in
    --filter) FILTER="$2"; shift 2 ;;
    --last)   LAST="$2";   shift 2 ;;
    --json)   JSON_MODE=true; shift ;;
    -*)       echo "Unknown flag: $1" >&2; exit 1 ;;
    *)        LOG_FILE="$1"; shift ;;
  esac
done

if [ ! -f "$LOG_FILE" ]; then
  echo "No request log found at $LOG_FILE"
  exit 0
fi

if ! command -v jq &>/dev/null; then
  echo "Error: jq not found. Run: nix develop path:~/.claude/workflows/forgejo" >&2
  exit 1
fi

TOTAL=$(wc -l < "$LOG_FILE" | tr -d ' ')

if [ "$TOTAL" -eq 0 ]; then
  echo "No requests logged yet."
  exit 0
fi

# Build jq filter
JQ_SELECT='.'
if [ -n "$FILTER" ]; then
  JQ_SELECT="select(.status == \"$FILTER\")"
fi

CONTENT=$(jq -r "$JQ_SELECT" "$LOG_FILE" 2>/dev/null | jq -s '.')

if [ "$LAST" -gt 0 ]; then
  CONTENT=$(echo "$CONTENT" | jq ".[-${LAST}:]")
fi

if [ "$JSON_MODE" = true ]; then
  echo "$CONTENT"
  exit 0
fi

COUNT=$(echo "$CONTENT" | jq 'length')

echo "━━━ Request History ($LOG_FILE) ━━━"
echo "Total: $TOTAL entries | Showing: $COUNT${FILTER:+ ($FILTER)}"
echo ""

echo "$CONTENT" | jq -r '.[] |
  "[\(.timestamp[0:16])]  \(.id)",
  "  Prompt:  \(.prompt | gsub("\n";" ") | .[0:80])\(if (.prompt | length) > 80 then "…" else "" end)",
  "  Branch:  \(.branch)",
  (if .pr_number then
    "  PR:      #\(.pr_number) [\(.status)] \(.pr_url // "")"
  else
    "  PR:      none yet  (status: \(.status))"
  end),
  ""
'

# Summary stats
OPEN=$(jq -r 'select(.status == "open")' "$LOG_FILE" | jq -s 'length')
MERGED=$(jq -r 'select(.status == "merged")' "$LOG_FILE" | jq -s 'length')
PENDING=$(jq -r 'select(.status == "pending")' "$LOG_FILE" | jq -s 'length')

echo "━━━ Summary ━━━"
echo "  Open PRs:   $OPEN"
echo "  Merged:     $MERGED"
echo "  No PR yet:  $PENDING"