#!/bin/bash

# Check all sessions with PRs for review comments and trigger agents to address them
# Usage: ~/claude-review-check [integrator|splitly]

PROJECT="${1:-splitly}"

case "$PROJECT" in
    integrator|i)
        SESSION_PREFIX="integrator"
        SESSION_DATA_DIR="$HOME/.integrator-sessions"
        ;;
    splitly|s|safesplit)
        SESSION_PREFIX="splitly"
        SESSION_DATA_DIR="$HOME/.splitly-sessions"
        ;;
    agent-orchestrator|ao)
        SESSION_PREFIX="ao"
        SESSION_DATA_DIR="$HOME/.ao-sessions"
        ;;
    *)
        echo "Usage: ~/claude-review-check [integrator|splitly|ao]"
        exit 1
        ;;
esac

echo "╔══════════════════════════════════════════════════════════════════════════════╗"
echo "║                        PR REVIEW COMMENT CHECKER                             ║"
echo "╚══════════════════════════════════════════════════════════════════════════════╝"
echo ""
echo "Project: $PROJECT"
echo ""

# Get all sessions
sessions=$(tmux list-sessions -F '#{session_name}' 2>/dev/null | grep "^${SESSION_PREFIX}-" | sort)

if [ -z "$sessions" ]; then
    echo "No active sessions found."
    exit 0
fi

TRIGGERED=()
SKIPPED_NO_PR=()
SKIPPED_NO_COMMENTS=()
ERRORS=()

for session in $sessions; do
    data_file="$SESSION_DATA_DIR/$session"

    if [ ! -f "$data_file" ]; then
        SKIPPED_NO_PR+=("$session (no metadata)")
        continue
    fi

    pr_url=$(grep "^pr=" "$data_file" 2>/dev/null | cut -d'=' -f2-)
    branch=$(grep "^branch=" "$data_file" 2>/dev/null | cut -d'=' -f2-)

    if [ -z "$pr_url" ]; then
        SKIPPED_NO_PR+=("$session")
        continue
    fi

    echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
    echo "📍 $session"
    echo "   Branch: ${branch:--}"
    echo "   PR: $pr_url"

    # Extract PR number and repo from URL
    # Format: https://github.com/owner/repo/pull/123
    if [[ "$pr_url" =~ github\.com/([^/]+)/([^/]+)/pull/([0-9]+) ]]; then
        owner="${BASH_REMATCH[1]}"
        repo="${BASH_REMATCH[2]}"
        pr_number="${BASH_REMATCH[3]}"
    else
        echo "   ⚠️  Could not parse PR URL"
        ERRORS+=("$session: invalid PR URL")
        continue
    fi

    # Check for review comments using gh
    # Get pending review comments (not resolved)
    echo "   Checking for review comments..."

    # Get PR review comments
    review_data=$(gh pr view "$pr_number" --repo "$owner/$repo" --json reviewDecision,reviews,comments 2>/dev/null)

    if [ $? -ne 0 ]; then
        echo "   ⚠️  Failed to fetch PR data"
        ERRORS+=("$session: gh command failed")
        continue
    fi

    # Check review decision
    review_decision=$(echo "$review_data" | jq -r '.reviewDecision // "NONE"')

    # Count reviews that requested changes
    changes_requested=$(echo "$review_data" | jq '[.reviews[] | select(.state == "CHANGES_REQUESTED")] | length')

    # Get review comments (these are inline code comments)
    # We'll use the gh api to get pending review comments
    pending_comments=$(gh api "repos/$owner/$repo/pulls/$pr_number/comments" --jq '[.[] | select(.in_reply_to_id == null)] | length' 2>/dev/null || echo "0")

    # Also check for regular PR comments that might be review feedback
    pr_comments=$(gh pr view "$pr_number" --repo "$owner/$repo" --json comments --jq '.comments | length' 2>/dev/null || echo "0")

    echo "   Review decision: $review_decision"
    echo "   Review comments: $pending_comments"
    echo "   PR comments: $pr_comments"

    # Determine if we need to trigger the agent
    should_trigger=false
    trigger_reason=""

    if [ "$review_decision" = "CHANGES_REQUESTED" ]; then
        should_trigger=true
        trigger_reason="Changes requested"
    elif [ "$changes_requested" -gt 0 ]; then
        should_trigger=true
        trigger_reason="$changes_requested review(s) requested changes"
    elif [ "$pending_comments" -gt 0 ]; then
        should_trigger=true
        trigger_reason="$pending_comments review comment(s) to address"
    fi

    if [ "$should_trigger" = true ]; then
        echo "   🔔 $trigger_reason - triggering agent..."

        # Send prompt to the tmux session
        prompt="There are review comments on your PR ($pr_url). Please check the PR review comments using 'gh pr view $pr_number --repo $owner/$repo --comments' and 'gh api repos/$owner/$repo/pulls/$pr_number/comments', address each comment, commit and push your fixes, then reply to the comments indicating what you fixed."

        # Send to tmux - first send Ctrl+C to interrupt if busy, then the prompt
        tmux send-keys -t "$session" C-c 2>/dev/null
        sleep 0.5
        tmux send-keys -t "$session" "$prompt" Enter

        TRIGGERED+=("$session: $trigger_reason")
        echo "   ✅ Agent triggered"
    else
        echo "   ✓ No pending review comments"
        SKIPPED_NO_COMMENTS+=("$session")
    fi
done

echo ""
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
echo ""
echo "📊 SUMMARY"
echo "   Triggered: ${#TRIGGERED[@]}"
echo "   No PR: ${#SKIPPED_NO_PR[@]}"
echo "   No comments: ${#SKIPPED_NO_COMMENTS[@]}"
echo "   Errors: ${#ERRORS[@]}"

if [ ${#TRIGGERED[@]} -gt 0 ]; then
    echo ""
    echo "Triggered sessions:"
    for item in "${TRIGGERED[@]}"; do
        echo "   • $item"
    done
fi

if [ ${#ERRORS[@]} -gt 0 ]; then
    echo ""
    echo "Errors:"
    for item in "${ERRORS[@]}"; do
        echo "   • $item"
    done
fi

echo ""