#!/usr/bin/env bash
# validate_entry.sh — Validate a forge-log entry has proper YAML frontmatter
# Usage: ./scripts/validate_entry.sh <entry_file>

set -euo pipefail

if [ $# -eq 0 ]; then
    echo "Usage: $0 <entry_file> [entry_file2 ...]"
    echo "Example: $0 entries/2026-04-04.md"
    exit 1
fi

errors=0
checked=0

for file in "$@"; do
    checked=$((checked + 1))
    file_errors=0
    
    if [ ! -f "$file" ]; then
        echo "FAIL: $file — file not found"
        errors=$((errors + 1))
        continue
    fi

    # Check file starts with ---
    first_line=$(head -1 "$file")
    if [ "$first_line" != "---" ]; then
        echo "FAIL: $file — missing opening '---' frontmatter delimiter"
        file_errors=$((file_errors + 1))
    fi

    # Find closing --- (second occurrence)
    closing_line=$(awk 'NR>1 && /^---$/ {print NR; exit}' "$file")
    if [ -z "$closing_line" ]; then
        echo "FAIL: $file — missing closing '---' frontmatter delimiter"
        file_errors=$((file_errors + 1))
    fi

    # Check required fields in frontmatter
    if [ -n "$closing_line" ]; then
        frontmatter=$(sed -n "2,$((closing_line - 1))p" "$file")
        
        # Check for date field
        if ! echo "$frontmatter" | grep -q "^date:"; then
            echo "FAIL: $file — missing 'date' field in frontmatter"
            file_errors=$((file_errors + 1))
        fi
        
        # Check for wizard field
        if ! echo "$frontmatter" | grep -q "^wizard:"; then
            echo "FAIL: $file — missing 'wizard' field in frontmatter"
            file_errors=$((file_errors + 1))
        fi
        
        # Check for tags field
        if ! echo "$frontmatter" | grep -q "^tags:"; then
            echo "FAIL: $file — missing 'tags' field in frontmatter"
            file_errors=$((file_errors + 1))
        fi
        
        # Check for status field
        if ! echo "$frontmatter" | grep -q "^status:"; then
            echo "FAIL: $file — missing 'status' field in frontmatter"
            file_errors=$((file_errors + 1))
        fi
    fi

    if [ "$file_errors" -eq 0 ]; then
        echo "PASS: $file — valid frontmatter (date, wizard, tags, status)"
    else
        errors=$((errors + file_errors))
    fi
done

echo ""
echo "Checked: $checked file(s), Errors: $errors"

if [ "$errors" -gt 0 ]; then
    exit 1
fi

exit 0