"""
Complete Metadata Generation V2 - Quality Assured

This version applies strict quality controls and enhanced extraction logic.
"""
import sys
import json
from pathlib import Path
from datetime import datetime

sys.path.insert(0, str(Path(__file__).parent))

from placeholder_metadata import (
    PlaceholderType,
    TimeWindow,
    OutputType,
    SourceInfo,
    QualityFilterPolicy,
    ConfidenceLogic,
    METADATA_REGISTRY
)
from placeholder_metadata_extractor import build_complete_metadata_registry
from placeholder_metadata_enhanced import (
    extract_value_raw,
    infer_unit_strict,
    detect_time_window_precise,
    resolve_real_source,
    create_activity_quality_policy,
    create_confidence_logic,
    calculate_completeness_score
)


def apply_enhanced_corrections(registry):
    """
    Apply enhanced corrections with strict quality controls.

    This replaces heuristic guessing with deterministic derivation.
    """
    all_metadata = registry.get_all()

    for key, metadata in all_metadata.items():
        unresolved = []

        # ── 1. Fix value_raw ──────────────────────────────────────────────────
        if metadata.value_display and metadata.value_display not in ['nicht verfügbar', '']:
            raw_val, success = extract_value_raw(
                metadata.value_display,
                metadata.output_type,
                metadata.type
            )
            if success:
                metadata.value_raw = raw_val
            else:
                metadata.value_raw = None
                unresolved.append('value_raw')

        # ── 2. Fix unit (strict) ──────────────────────────────────────────────
        strict_unit = infer_unit_strict(
            key,
            metadata.description,
            metadata.output_type,
            metadata.type
        )
        # Only overwrite if we have a confident answer or existing is clearly wrong
        if strict_unit is not None:
            metadata.unit = strict_unit
        elif metadata.output_type in [OutputType.JSON, OutputType.MARKDOWN, OutputType.ENUM]:
            metadata.unit = None  # These never have units
        elif 'score' in key.lower() or 'correlation' in key.lower():
            metadata.unit = None  # Dimensionless

        # ── 3. Fix time_window (precise detection) ────────────────────────────
        tw, is_certain, mismatch = detect_time_window_precise(
            key,
            metadata.description,
            metadata.source.resolver,
            metadata.semantic_contract
        )

        if is_certain:
            metadata.time_window = tw
            if mismatch:
                metadata.legacy_contract_mismatch = True
                if mismatch not in metadata.known_issues:
                    metadata.known_issues.append(mismatch)
        else:
            metadata.time_window = tw
            if tw == TimeWindow.UNKNOWN:
                unresolved.append('time_window')
            else:
                # Inferred but not certain
                if mismatch and mismatch not in metadata.notes:
                    metadata.notes.append(f"Time window inferred: {mismatch}")

        # ── 4. Fix source provenance ──────────────────────────────────────────
        func, dl_module, tables, source_kind = resolve_real_source(metadata.source.resolver)

        if func:
            metadata.source.function = func
        if dl_module:
            metadata.source.data_layer_module = dl_module
        if tables:
            metadata.source.source_tables = tables
        metadata.source.source_kind = source_kind

        if source_kind == "wrapper" or source_kind == "unknown":
            unresolved.append('source')

        # ── 5. Add quality_filter_policy for activity placeholders ────────────
        if not metadata.quality_filter_policy:
            qfp = create_activity_quality_policy(key)
            if qfp:
                metadata.quality_filter_policy = qfp

        # ── 6. Add confidence_logic ────────────────────────────────────────────
        if not metadata.confidence_logic:
            cl = create_confidence_logic(key, metadata.source.data_layer_module)
            if cl:
                metadata.confidence_logic = cl

        # ── 7. Determine provenance_confidence ────────────────────────────────
        if metadata.source.data_layer_module and metadata.source.source_tables:
            metadata.provenance_confidence = "high"
        elif metadata.source.function or metadata.source.source_tables:
            metadata.provenance_confidence = "medium"
        else:
            metadata.provenance_confidence = "low"

        # ── 8. Determine contract_source ───────────────────────────────────────
        if metadata.semantic_contract and len(metadata.semantic_contract) > 50:
            metadata.contract_source = "documented"
        elif metadata.description:
            metadata.contract_source = "inferred"
        else:
            metadata.contract_source = "unknown"

        # ── 9. Check for orphaned placeholders ────────────────────────────────
        if not metadata.used_by.prompts and not metadata.used_by.pipelines and not metadata.used_by.charts:
            metadata.orphaned_placeholder = True

        # ── 10. Set unresolved fields ──────────────────────────────────────────
        metadata.unresolved_fields = unresolved

        # ── 11. Calculate completeness score ───────────────────────────────────
        metadata.metadata_completeness_score = calculate_completeness_score(metadata.to_dict())

        # ── 12. Set schema status ──────────────────────────────────────────────
        if metadata.metadata_completeness_score >= 80 and len(unresolved) == 0:
            metadata.schema_status = "validated"
        elif metadata.metadata_completeness_score >= 50:
            metadata.schema_status = "draft"
        else:
            metadata.schema_status = "incomplete"

    return registry


def generate_qa_report(registry) -> str:
    """
    Generate QA report with quality metrics.
    """
    all_metadata = registry.get_all()
    total = len(all_metadata)

    # Collect metrics
    category_unknown = sum(1 for m in all_metadata.values() if m.category == "Unknown")
    no_description = sum(1 for m in all_metadata.values() if not m.description or "No description" in m.description)
    tw_unknown = sum(1 for m in all_metadata.values() if m.time_window == TimeWindow.UNKNOWN)
    no_quality_filter = sum(1 for m in all_metadata.values() if not m.quality_filter_policy and 'activity' in m.key.lower())
    no_confidence = sum(1 for m in all_metadata.values() if not m.confidence_logic and m.source.data_layer_module)
    legacy_mismatch = sum(1 for m in all_metadata.values() if m.legacy_contract_mismatch)
    orphaned = sum(1 for m in all_metadata.values() if m.orphaned_placeholder)

    # Find problematic placeholders
    problematic = []
    for key, m in all_metadata.items():
        score = m.metadata_completeness_score
        unresolved_count = len(m.unresolved_fields)
        issues_count = len(m.known_issues)

        problem_score = (100 - score) + (unresolved_count * 10) + (issues_count * 5)
        if problem_score > 0:
            problematic.append((key, problem_score, score, unresolved_count, issues_count))

    problematic.sort(key=lambda x: x[1], reverse=True)

    # Build report
    lines = [
        "# Placeholder Metadata QA Report",
        "",
        f"**Generated:** {datetime.now().strftime('%Y-%m-%d %H:%M:%S')}",
        f"**Total Placeholders:** {total}",
        "",
        "## Quality Metrics",
        "",
        f"- **Category Unknown:** {category_unknown} ({category_unknown/total*100:.1f}%)",
        f"- **No Description:** {no_description} ({no_description/total*100:.1f}%)",
        f"- **Time Window Unknown:** {tw_unknown} ({tw_unknown/total*100:.1f}%)",
        f"- **Activity without Quality Filter:** {no_quality_filter}",
        f"- **Data Layer without Confidence Logic:** {no_confidence}",
        f"- **Legacy/Implementation Mismatch:** {legacy_mismatch}",
        f"- **Orphaned (unused):** {orphaned}",
        "",
        "## Completeness Distribution",
        "",
    ]

    # Completeness buckets
    buckets = {
        "90-100%": sum(1 for m in all_metadata.values() if m.metadata_completeness_score >= 90),
        "70-89%": sum(1 for m in all_metadata.values() if 70 <= m.metadata_completeness_score < 90),
        "50-69%": sum(1 for m in all_metadata.values() if 50 <= m.metadata_completeness_score < 70),
        "0-49%": sum(1 for m in all_metadata.values() if m.metadata_completeness_score < 50),
    }

    for bucket, count in buckets.items():
        lines.append(f"- **{bucket}:** {count} placeholders ({count/total*100:.1f}%)")

    lines.append("")
    lines.append("## Top 20 Most Problematic Placeholders")
    lines.append("")
    lines.append("| Rank | Placeholder | Completeness | Unresolved | Issues |")
    lines.append("|------|-------------|--------------|------------|--------|")

    for i, (key, _, score, unresolved_count, issues_count) in enumerate(problematic[:20], 1):
        lines.append(f"| {i} | `{{{{{key}}}}}` | {score}% | {unresolved_count} | {issues_count} |")

    lines.append("")
    lines.append("## Schema Status Distribution")
    lines.append("")

    status_counts = {}
    for m in all_metadata.values():
        status_counts[m.schema_status] = status_counts.get(m.schema_status, 0) + 1

    for status, count in sorted(status_counts.items()):
        lines.append(f"- **{status}:** {count} ({count/total*100:.1f}%)")

    return "\n".join(lines)


def generate_unresolved_report(registry) -> dict:
    """
    Generate unresolved fields report as JSON.
    """
    all_metadata = registry.get_all()

    unresolved_by_placeholder = {}
    unresolved_by_field = {}

    for key, m in all_metadata.items():
        if m.unresolved_fields:
            unresolved_by_placeholder[key] = m.unresolved_fields

            for field in m.unresolved_fields:
                if field not in unresolved_by_field:
                    unresolved_by_field[field] = []
                unresolved_by_field[field].append(key)

    return {
        "generated_at": datetime.now().isoformat(),
        "total_placeholders_with_unresolved": len(unresolved_by_placeholder),
        "by_placeholder": unresolved_by_placeholder,
        "by_field": unresolved_by_field,
        "summary": {
            field: len(placeholders)
            for field, placeholders in unresolved_by_field.items()
        }
    }


def main():
    """Main execution."""
    print("="*60)
    print("ENHANCED PLACEHOLDER METADATA GENERATION V2")
    print("="*60)
    print()

    try:
        # Build registry
        print("Building metadata registry...")
        registry = build_complete_metadata_registry()
        print(f"Loaded {registry.count()} placeholders")
        print()

        # Apply enhanced corrections
        print("Applying enhanced corrections...")
        registry = apply_enhanced_corrections(registry)
        print("Enhanced corrections applied")
        print()

        # Generate reports
        print("Generating QA report...")
        qa_report = generate_qa_report(registry)
        qa_path = Path(__file__).parent.parent / "docs" / "PLACEHOLDER_METADATA_QA_REPORT.md"
        with open(qa_path, 'w', encoding='utf-8') as f:
            f.write(qa_report)
        print(f"QA Report: {qa_path}")

        print("Generating unresolved report...")
        unresolved = generate_unresolved_report(registry)
        unresolved_path = Path(__file__).parent.parent / "docs" / "PLACEHOLDER_METADATA_UNRESOLVED.json"
        with open(unresolved_path, 'w', encoding='utf-8') as f:
            json.dump(unresolved, f, indent=2, ensure_ascii=False)
        print(f"Unresolved Report: {unresolved_path}")

        # Summary
        all_metadata = registry.get_all()
        avg_completeness = sum(m.metadata_completeness_score for m in all_metadata.values()) / len(all_metadata)
        validated_count = sum(1 for m in all_metadata.values() if m.schema_status == "validated")

        print()
        print("="*60)
        print("SUMMARY")
        print("="*60)
        print(f"Total Placeholders: {len(all_metadata)}")
        print(f"Average Completeness: {avg_completeness:.1f}%")
        print(f"Validated: {validated_count} ({validated_count/len(all_metadata)*100:.1f}%)")
        print(f"Time Window Unknown: {sum(1 for m in all_metadata.values() if m.time_window == TimeWindow.UNKNOWN)}")
        print(f"Orphaned: {sum(1 for m in all_metadata.values() if m.orphaned_placeholder)}")

        return 0

    except Exception as e:
        print(f"\nERROR: {e}")
        import traceback
        traceback.print_exc()
        return 1


if __name__ == "__main__":
    sys.exit(main())