import sys
from pathlib import Path

from gx_compiler.compiler import GXCompiler, CompilerError
from runtime_executor.integration import run_gx_with_summary
from runtime_executor.gx_loader import load_gx, GXLoaderError


def cmd_compile(source_path: str, output_path: str = None) -> int:
    try:
        source = Path(source_path)

        if not source.exists():
            print(f"Error: Source file not found: {source_path}", file=sys.stderr)
            return 1

        if output_path is None:
            output_path = str(source.with_suffix(".gx"))

        print(f"Compiling {source_path} → {output_path}")

        GXCompiler.compile_to_gx(
            source_path=source_path,
            output_path=output_path,
            verbose=False
        )

        output = Path(output_path)
        size = output.stat().st_size
        print(f"Success: {output_path} ({size} bytes)")
        return 0

    except CompilerError as e:
        print(f"Compilation error: {e}", file=sys.stderr)
        return 1
    except Exception as e:
        print(f"Error: {e}", file=sys.stderr)
        return 1


def cmd_run(gx_path: str) -> int:
    try:
        gx = Path(gx_path)

        if not gx.exists():
            print(f"Error: File not found: {gx_path}", file=sys.stderr)
            return 1

        print(f"Running {gx_path}")

        summary = run_gx_with_summary(gx_path)

        if summary['success']:
            print(f"Success: Executed {summary['segments_executed']} segments in {summary['duration']:.4f}s")
            return 0
        else:
            print(f"Failed: {len(summary['errors'])} error(s)")
            for err in summary['errors']:
                print(f"  - {err}", file=sys.stderr)
            return 1

    except Exception as e:
        print(f"Error: {e}", file=sys.stderr)
        return 1


def cmd_inspect(gx_path: str) -> int:
    try:
        gx = Path(gx_path)

        if not gx.exists():
            print(f"Error: File not found: {gx_path}", file=sys.stderr)
            return 1

        print(f"Inspecting {gx_path}")

        try:
            from codex_lineage.inspector import inspect_gx
            result = inspect_gx(gx_path)
            print(result)
            return 0
        except ImportError:
            manifest, payload = load_gx(gx_path)

            print("\n[Manifest]")
            print(f"  version: {manifest.get('version')}")
            print(f"  origin: {manifest.get('origin')}")
            print(f"  source_file: {manifest.get('source_file')}")
            print(f"  source_type: {manifest.get('source_type')}")
            print(f"  compression_model: {manifest.get('compression_model')}")
            print(f"  contributor: {manifest.get('contributor')}")

            segments = manifest.get('codex_lineage', {}).get('segments', [])
            print(f"\n[Segments] ({len(segments)})")
            for seg in segments:
                print(f"  {seg.get('id')}: lines {seg.get('start')}-{seg.get('end')}")

            print(f"\n[Payload] {len(payload)} bytes (compressed)")

            return 0

    except GXLoaderError as e:
        print(f"Load error: {e}", file=sys.stderr)
        return 1
    except Exception as e:
        print(f"Error: {e}", file=sys.stderr)
        return 1


def cmd_summary(gx_path: str) -> int:
    try:
        gx = Path(gx_path)

        if not gx.exists():
            print(f"Error: File not found: {gx_path}", file=sys.stderr)
            return 1

        try:
            from codex_lineage.inspector import inspect_gx
            result = inspect_gx(gx_path)
            print(result)
            return 0
        except ImportError:
            manifest, payload = load_gx(gx_path)

            segments = manifest.get('codex_lineage', {}).get('segments', [])

            print(f"GX File: {gx_path}")
            print(f"Source: {manifest.get('source_file')}")
            print(f"Type: {manifest.get('source_type')}")
            print(f"Segments: {len(segments)}")
            print(f"Compressed: {len(payload)} bytes")
            print(f"Version: {manifest.get('version')}")

            return 0

    except GXLoaderError as e:
        print(f"Load error: {e}", file=sys.stderr)
        return 1
    except Exception as e:
        print(f"Error: {e}", file=sys.stderr)
        return 1