from __future__ import annotations

import inspect
import subprocess
import tempfile
from pathlib import Path
from uuid import uuid4
import json

from . import __version__
from .cli import _LEVEL_MAP
from .render import render_markdown, write_outputs
from .scanner import audit_repository

try:
    import gradio as gr
except ImportError as exc:  # pragma: no cover
    raise RuntimeError(
        "Gradio failed to import. Install demo dependencies with "
        "`pip install -r requirements.txt` or `pip install -e .[demo]`. "
        f"Original error: {exc}"
    ) from exc


_DEFAULT_REPO = "https://github.com/flamehaven01/STEM-BIO-AI"
_PLACEHOLDER_REPO = "https://github.com/<owner>/<bio-medical-ai-repo>"


def _blocks_kwargs() -> dict[str, str]:
    params = inspect.signature(gr.Blocks).parameters
    return {"css": _CSS} if "css" in params else {}


def _launch_kwargs() -> dict[str, str]:
    params = inspect.signature(gr.Blocks.launch).parameters
    return {"css": _CSS} if "css" in params else {}


def _clone_github(url: str, destination: Path) -> Path:
    if not url.startswith("https://github.com/"):
        raise ValueError("Only public https://github.com/ URLs are supported in the demo.")
    target = destination / "repo"
    result = subprocess.run(
        ["git", "clone", "--depth", "1", url, str(target)],
        capture_output=True,
        text=True,
        timeout=120,
    )
    if result.returncode != 0:
        raise RuntimeError(result.stderr.strip() or "git clone failed")
    return target


def _finding_cards(result: dict) -> str:
    score = result["score"]
    classification = result["classification"]
    integrity = result["code_integrity"]
    s3 = result.get("stage_3_rubric", {})
    regulatory = result.get("regulatory_traceability", {})
    basis = result.get("regulatory_basis", {})
    detector_summary = result.get("detector_summary", {}).get("by_detector", {})

    # Stage scores
    stage_lines = [
        "| Stage | Score |",
        "|-------|------:|",
        f"| Stage 1 README Evidence | `{score['stage_1_readme_intent']} / 100` |",
        f"| Stage 2R Repo Consistency | `{score['stage_2_repo_local_consistency']} / 100` |",
        f"| Stage 3 Code/Bio Responsibility | `{score['stage_3_code_bio']} / 100` |",
    ]

    # Stage 3 3-tier detail
    t3_score = s3.get("T3_changelog_release_hygiene", {}).get("score", 0)
    b1_score = s3.get("B1_data_provenance_controls", {}).get("score", 0)
    b2_score = s3.get("B2_bias_limitations", {}).get("score", 0)

    # Replication lane
    rep_score = result.get("replication_score", "n/a")
    rep_tier = result.get("replication_tier", "n/a")

    # Code integrity
    warnings = [
        f"**{key.replace('_', ' ')}**: `{item['status']}`"
        for key, item in integrity.items()
        if item.get("status") != "PASS"
    ]
    warning_text = "\n".join(f"- {line}" for line in warnings) or "- No C1-C4 warning/fail status detected."

    # Notable signals
    risks = result.get("notable_risks", [])
    positives = result.get("notable_positive_evidence", [])
    risk_text = "\n".join(f"- {r}" for r in risks[:4]) or "- None detected."
    pos_text = "\n".join(f"- {p}" for p in positives[:4]) or "- None detected."
    bio_lines = []
    for detector, label in (
        ("BIO_smiles_surface_integrity", "SMILES surface"),
        ("BIO_smiles_rdkit_validation", "SMILES RDKit lane"),
        ("BIO_smiles_parser_guard", "SMILES parser guard"),
        ("BIO_silent_mock_fallback", "Silent mock fallback"),
        ("BIO_run_trace", "Bio run trace"),
    ):
        counts = detector_summary.get(detector, {})
        if not counts:
            continue
        if counts.get("detected"):
            bio_lines.append(f"- **{label}:** detected `{counts['detected']}`")
        elif counts.get("not_applicable"):
            bio_lines.append(f"- **{label}:** not applicable")
        else:
            bio_lines.append(f"- **{label}:** not detected")
    bio_text = "\n".join(bio_lines) or "- No bio deterministic diagnostics were emitted."
    traceability_summary = regulatory.get(
        "summary",
        "No regulatory traceability summary emitted.",
    )
    basis_title = basis.get("note", {}).get("title", "Regulatory basis note")
    source_ids = basis.get("source_ids", [])
    m15_active = "ich_m15_midd_2026" in source_ids

    return "\n".join(
        [
            "### Audit Snapshot",
            f"- **Final score:** `{score['final_score']} / 100`",
            f"- **Formal tier:** `{score['formal_tier']}`",
            f"- **Clinical adjacency:** `{classification['ca_severity']}`",
            f"- **Use scope:** {score['use_scope']}",
            "",
            "### Stage Scores",
            *stage_lines,
            "",
            "### Stage 3 Detail",
            f"- T3 Changelog hygiene: `{t3_score}` &nbsp; B1 Data provenance: `{b1_score}` &nbsp; B2 Bias measurement: `{b2_score}`",
            "",
            "### Replication Lane (Stage 4)",
            f"- Score: `{rep_score}` &nbsp; Tier: `{rep_tier}`",
            "",
            "### Code Integrity",
            warning_text,
            "",
            "### Notable Risks",
            risk_text,
            "",
            "### Positive Evidence",
            pos_text,
            "",
            "### Bio Deterministic Diagnostics",
            bio_text,
            "",
            "### Regulatory Traceability",
            f"- **Summary:** {traceability_summary}",
            f"- **{basis_title}:** current official source classes as of {basis.get('as_of', 'current registry month')}",
            f"- **ICH M15 MIDD:** {'✓ aligned — §§2.1.2 Context of Use · §3 Verification/Validation · §4.1 MAP · §4.2 MAR · §4.3 code submission' if m15_active else 'not in registry (update regulatory_basis_registry.v1.json)'}",
        ]
    )


def _json_preview(result: dict) -> str:
    preview = {
        "schema_version": result["schema_version"],
        "stem_ai_version": result["stem_ai_version"],
        "target": result["target"],
        "classification": result["classification"],
        "score": result["score"],
        "replication_score": result.get("replication_score"),
        "replication_tier": result.get("replication_tier"),
        "stage_1_rubric": result.get("stage_1_rubric", {}),
        "stage_2r_rubric": result.get("stage_2r_rubric", {}),
        "stage_3_rubric": result.get("stage_3_rubric", {}),
        "stage_4_rubric": result.get("stage_4_rubric", {}),
        "code_integrity": result.get("code_integrity", {}),
        "regulatory_basis": result.get("regulatory_basis", {}),
        "stage_traceability": result.get("stage_traceability", {}),
        "regulatory_traceability": result.get("regulatory_traceability", {}),
        "reasoning_model": result.get("reasoning_model", {}),
        "notable_positive_evidence": result.get("notable_positive_evidence", []),
        "notable_risks": result.get("notable_risks", []),
    }
    return json.dumps(preview, indent=2)


def run_demo(repo_url: str, level: int):
    repo_url = (repo_url or "").strip()
    try:
        level_int = int(level)
    except (TypeError, ValueError):
        level_int = 1
    if level_int not in _LEVEL_MAP:
        level_int = 1
    if not repo_url:
        return (
            "Waiting for repository URL",
            "### Input required\nPaste a public GitHub URL for a bio/medical AI repository.",
            "No report generated.",
            json.dumps({"status": "input_required", "example": _DEFAULT_REPO}, indent=2),
            "No JSON artifact generated.",
            "No PDF artifact generated.",
        )

    tmp_path = Path(tempfile.gettempdir()) / "stem_ai_demo" / uuid4().hex
    tmp_path.mkdir(parents=True, exist_ok=True)
    try:
        repo = _clone_github(repo_url, tmp_path)
        result = audit_repository(repo)
        mode, pages = _LEVEL_MAP[level_int]
        output_dir = tmp_path / "out"
        files = write_outputs(result, output_dir, mode, pages, "all")
        report = render_markdown(result, mode, pages)
        json_file = next(p for p in files if p.name.endswith("_experiment_results.json"))
        pdf_file = next(p for p in files if p.suffix == ".pdf")
        return (
            f"{result['score']['final_score']} / 100  ({result['score']['formal_tier']})",
            _finding_cards(result),
            report,
            _json_preview(result),
            f"Generated JSON artifact: `{json_file.name}`",
            f"Generated PDF artifact: `{pdf_file.name}`",
        )
    except Exception as exc:
        return (
            "Audit failed",
            f"### Error\n`{type(exc).__name__}: {exc}`",
            "No report generated.",
            json.dumps({"error": str(exc), "error_type": type(exc).__name__}, indent=2),
            "No JSON artifact generated.",
            "No PDF artifact generated.",
        )


_CSS = """
.hero {
  padding: 28px 32px;
  border-radius: 18px;
  background: linear-gradient(135deg, #10233f 0%, #17616f 55%, #d7a84a 100%);
  color: white;
  margin-bottom: 20px;
}
.hero h1 { font-size: 40px; line-height: 1.05; margin: 0 0 10px; font-weight: 800; }
.hero p  { font-size: 16px; max-width: 820px; margin: 0; opacity: 0.92; line-height: 1.6; }
.overview-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 4px 0 22px;
}
@media (max-width: 1200px) {
  .overview-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 760px) {
  .overview-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}
"""

_CARD_STYLE = (
    "border:1px solid #dde6ef;border-radius:13px;padding:18px 20px;"
    "background:#ffffff;box-shadow:0 4px 18px rgba(16,35,63,0.08);"
    "display:flex;flex-direction:column;gap:8px;"
)
_CARD_TITLE = (
    "font-size:12px;font-weight:800;text-transform:uppercase;"
    "letter-spacing:0.06em;color:#10233f;margin:0;"
)
_CARD_BODY = "font-size:13.5px;color:#374151;line-height:1.55;margin:0;"
_CODE_PILL = (
    "display:inline-block;background:#dbeafe;border:1px solid #93c5fd;"
    "border-radius:6px;padding:2px 8px;font-family:ui-monospace,monospace;"
    "font-size:12.5px;font-weight:700;color:#1e40af;"
)
_STAGE_BADGE = (
    "display:inline-block;background:#e0f2fe;border:1px solid #0284c7;"
    "border-radius:5px;padding:1px 6px;margin-right:4px;"
    "font-size:12px;font-weight:900;color:#075985;"
)
_TIER_BADGE = (
    "display:inline-block;border-radius:5px;padding:1px 6px;margin:2px 4px 2px 0;"
    "font-size:12px;font-weight:900;color:#ffffff;"
)

with gr.Blocks(title=f"STEM BIO-AI — Evidence Scanner v{__version__}", **_blocks_kwargs()) as demo:
    gr.HTML(
        f"""
        <div class="hero">
          <h1>STEM BIO-AI <span style="font-size:20px;font-weight:400;opacity:0.7">v{__version__}</span></h1>
          <p>Deterministic evidence-surface scanner for bio/medical AI repositories.
          No LLM &nbsp;·&nbsp; No API key &nbsp;·&nbsp; No model runtime &nbsp;·&nbsp; No secrets sent anywhere.<br>
          Scans README, docs, CI, tests, changelogs, and manifests — returns a T0–T4 triage tier
          with JSON, Markdown, and PDF artifacts. Rubric items are citation-aligned to
          <strong>ICH M15 MIDD</strong> (Step 4, Jan 2026) and EU AI Act / IMDRF frameworks for regulatory traceability.</p>
        </div>
        """
    )
    gr.HTML(
        f"""
        <div class="overview-grid">
          <div style="{_CARD_STYLE}">
            <p style="{_CARD_TITLE}">No API key required</p>
            <p style="{_CARD_BODY}">Clones a public GitHub repository and runs a fully
            deterministic local scanner. Does not call OpenAI, Anthropic,
            GitHub API, or any external service.</p>
          </div>
          <div style="{_CARD_STYLE}">
            <p style="{_CARD_TITLE}">Local CLI</p>
            <p style="{_CARD_BODY}">Run locally for downloadable JSON, Markdown, PDF, and explain artifacts:</p>
            <code style="{_CODE_PILL}">stem &lt;folder&gt; --format all --explain</code>
          </div>
          <div style="{_CARD_STYLE}">
            <p style="{_CARD_TITLE}">What STEM scans</p>
            <p style="{_CARD_BODY}">
              <span style="{_STAGE_BADGE}">S1</span> README hype/responsibility (H1–H6 penalties, R1–R5 credits) &nbsp;
              <span style="{_STAGE_BADGE}">S2R</span> Repo-local consistency &nbsp;
              <span style="{_STAGE_BADGE}">S3</span> CI · tests · changelog hygiene · data provenance · bias measurement &nbsp;
              <span style="{_STAGE_BADGE}">S4</span> Replication evidence lane
            </p>
          </div>
          <div style="{_CARD_STYLE}">
            <p style="{_CARD_TITLE}">Triage tiers</p>
            <p style="{_CARD_BODY}">
              <span style="{_TIER_BADGE}background:#b91c1c;">T0</span> Rejected
              <span style="{_TIER_BADGE}background:#c2410c;">T1</span> Quarantine
              <span style="{_TIER_BADGE}background:#b45309;">T2</span> Caution<br>
              <span style="{_TIER_BADGE}background:#0f766e;">T3</span> Supervised
              <span style="{_TIER_BADGE}background:#15803d;">T4</span> Candidate<br>
              <span style="color:#374151;font-size:12.5px;">Clinical-adjacent repos without a disclaimer
              are hard-capped at T2. T4 is not a clinical safety rating.</span>
            </p>
          </div>
          <div style="{_CARD_STYLE}">
            <p style="{_CARD_TITLE}">Regulatory Traceability</p>
            <p style="{_CARD_BODY}">
              Each rubric item is citation-aligned to official regulatory frameworks.
              Every scan output surfaces applicable requirement IDs.<br>
              <span style="display:inline-block;margin-top:6px;background:#dbeafe;border:1px solid #3b82f6;border-radius:5px;padding:2px 8px;font-size:12px;font-weight:700;color:#1d4ed8;">✓ ICH M15 MIDD (Step 4, Jan 2026)</span>
              <span style="display:inline-block;margin-top:4px;background:#e0f2fe;border:1px solid #0284c7;border-radius:5px;padding:2px 8px;font-size:12px;font-weight:700;color:#075985;">✓ EU AI Act 2024/1689</span>
              <span style="display:inline-block;margin-top:4px;background:#f0fdf4;border:1px solid #16a34a;border-radius:5px;padding:2px 8px;font-size:12px;font-weight:700;color:#15803d;">✓ IMDRF SaMD/GMLP</span>
            </p>
          </div>
          <div style="{_CARD_STYLE}">
            <p style="{_CARD_TITLE}">AIRI — AI Risk Index</p>
            <p style="{_CARD_BODY}">
              <span style="display:inline-block;background:#1e3a6e;border-radius:5px;padding:2px 8px;font-size:12px;font-weight:700;color:#ffffff;">AIRI</span>
              MIT AI Risk Repository runtime bundle maps triggered detectors to covered risks and known gaps
              across the curated bio/clinical subset (184 risks · 32 in detector scope).
            </p>
          </div>
        </div>
        """
    )
    gr.Markdown(
        "Paste a public bio/medical AI repository URL below. The demo works best on repositories "
        "with README/docs/tests/dependency files. Private repositories should be audited locally.\n\n"
        "> STEM BIO-AI includes deterministic bio diagnostics, contract checks, and a registry-driven regulatory traceability note layer.\n\n"
        "> Note: This Space scans the current default branch of a public GitHub repository at run time. "
        "Results may differ from commit-pinned benchmark artifacts or older local audit snapshots."
    )
    with gr.Row():
        with gr.Column(scale=3):
            repo_input = gr.Textbox(
                label="Public GitHub repository URL",
                value="",
                placeholder=_PLACEHOLDER_REPO,
                info=(
                    "Paste a public bio/medical AI repository URL. "
                    f"Safe demo repository: {_DEFAULT_REPO}"
                ),
            )
        with gr.Column(scale=1):
            level_input = gr.Radio(
                choices=[
                    ("Brief - 1 page (legacy)", 1),
                    ("Standard - 5 pages", 2),
                    ("Full - 8 pages", 3),
                ],
                value=3,
                label="Report Level",
                info="Legacy brief, standard review packet, or full evidence packet.",
            )
    with gr.Row():
        run_button = gr.Button("Run live GitHub audit", variant="primary", scale=2)
        clear_button = gr.Button("Clear", scale=1)
    score_output = gr.Textbox(label="Final Score", interactive=False)
    snapshot_output = gr.Markdown(label="Audit Snapshot")
    with gr.Tabs():
        with gr.Tab("Report"):
            report_output = gr.Markdown(label="Markdown report")
        with gr.Tab("JSON Preview"):
            json_preview = gr.Code(
                label="Machine-readable evidence object",
                language="json",
                interactive=False,
                lines=24,
            )
        with gr.Tab("Local CLI Artifacts"):
            gr.Markdown(
                "This public Space shows report and JSON previews in-browser. "
                "For actual downloadable JSON/Markdown/PDF artifacts, run the local CLI."
            )
            with gr.Row():
                json_output = gr.Textbox(label="JSON artifact", interactive=False)
                pdf_output = gr.Textbox(label="PDF artifact", interactive=False)

    _all_outputs = [score_output, snapshot_output, report_output, json_preview, json_output, pdf_output]

    run_button.click(
        fn=run_demo,
        inputs=[repo_input, level_input],
        outputs=_all_outputs,
        queue=True,
    )
    clear_button.click(
        fn=lambda: ["", "", "", "", "", ""],
        inputs=[],
        outputs=_all_outputs,
        queue=False,
    )


def launch_demo() -> None:
    """Launch the Space UI."""
    demo.queue().launch(
        server_name="0.0.0.0",
        server_port=7860,
        **_launch_kwargs(),
    )