from __future__ import annotations

# ── Dark G100 design tokens ──────────────────────────────────────────────────
_BG       = "#161616"
_L1       = "#262626"   # layer 01 — panels
_L2       = "#393939"   # layer 02 — rows / hover
_L3       = "#525252"   # layer 03 — borders
_T1       = "#f4f4f4"   # text primary
_T2       = "#c6c6c6"   # text secondary
_T3       = "#8d8d8d"   # text helper / labels
_T4       = "#6f6f6f"   # text disabled / placeholder
_BLUE     = "#4589ff"   # interactive (blue-40)
_BLUE_DIM = "#001d6c"   # blue tint bg (blue-90)
_BLUE_LNK = "#78a9ff"   # link / code (blue-30)

# status — dark
_ERR_BG   = "#2d0709"; _ERR_BD   = "#ff8389"; _ERR_FG   = "#ff8389"
_WARN_BG  = "#302200"; _WARN_BD  = "#f1c21b"; _WARN_FG  = "#f1c21b"
_OK_BG    = "#071908"; _OK_BD    = "#42be65"; _OK_FG    = "#42be65"
_INFO_BG  = _BLUE_DIM; _INFO_BD  = _BLUE;    _INFO_FG  = _BLUE

_FONT = "'IBM Plex Sans', system-ui, -apple-system, sans-serif"
_MONO = "'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace"

# ── SVG icons ────────────────────────────────────────────────────────────────
_SVG_ERROR = (
    "<svg width='20' height='20' viewBox='0 0 32 32' fill='currentColor'>"
    "<path d='M16 2C8.2 2 2 8.2 2 16s6.2 14 14 14 14-6.2 14-14S23.8 2 16 2z"
    "m5.4 21L16 17.6 10.6 23 9 21.4l5.4-5.4L9 10.6 10.6 9 16 14.4 21.4 9 23 10.6"
    "l-5.4 5.4 5.4 5.4L21.4 23z'/></svg>"
)
_SVG_WARNING = (
    "<svg width='20' height='20' viewBox='0 0 32 32' fill='currentColor'>"
    "<path d='M16 2L2 30h28L16 2zm-1.33 10.67h2.67V20h-2.67z"
    "M16 26a1.33 1.33 0 110-2.67A1.33 1.33 0 0116 26z'/></svg>"
)
_SVG_CHECK = (
    "<svg width='20' height='20' viewBox='0 0 32 32' fill='currentColor'>"
    "<path d='M16 2C8.2 2 2 8.2 2 16s6.2 14 14 14 14-6.2 14-14S23.8 2 16 2z"
    "m-3 20.6l-5.6-5.6 1.4-1.4 4.2 4.2 9.2-9.2 1.4 1.4L13 22.6z'/></svg>"
)
_SVG_INFO = (
    "<svg width='20' height='20' viewBox='0 0 32 32' fill='currentColor'>"
    "<path d='M17 22v-8h-4v2h2v6h-2v2h6v-2zM15 8a1.5 1.5 0 100 3 1.5 1.5 0 000-3z"
    "M16 2C8.2 2 2 8.2 2 16s6.2 14 14 14 14-6.2 14-14S23.8 2 16 2z'/></svg>"
)

_NOTIFICATION: dict[str, dict] = {
    "approved":           {"border": _OK_BD,   "bg": _OK_BG,   "color": _OK_FG,   "icon": _SVG_CHECK,   "label": "APPROVED"},
    "needs_human_review": {"border": _WARN_BD,  "bg": _WARN_BG, "color": _WARN_FG, "icon": _SVG_WARNING, "label": "NEEDS HUMAN REVIEW"},
    "rejected":           {"border": _ERR_BD,   "bg": _ERR_BG,  "color": _ERR_FG,  "icon": _SVG_ERROR,   "label": "REJECTED"},
    "refused":            {"border": _ERR_BD,   "bg": _ERR_BG,  "color": _ERR_FG,  "icon": _SVG_ERROR,   "label": "REFUSED"},
}
_DEFAULT_NOTIFICATION = {"border": _L3, "bg": _L1, "color": _T3, "icon": _SVG_INFO, "label": "UNKNOWN"}


def _notification_html(action: str, reason: str) -> str:
    cfg = _NOTIFICATION.get(action, _DEFAULT_NOTIFICATION)
    return (
        f"<div style='display:flex;align-items:flex-start;gap:12px;"
        f"background:{cfg['bg']};border-left:4px solid {cfg['border']};"
        f"padding:14px 16px;font-family:{_FONT}'>"
        f"<span style='color:{cfg['color']};flex-shrink:0;margin-top:1px'>{cfg['icon']}</span>"
        f"<div>"
        f"<p style='font-size:12px;font-weight:600;letter-spacing:0.32px;text-transform:uppercase;"
        f"color:{cfg['color']};margin:0 0 4px'>{cfg['label']}</p>"
        f"<p style='font-size:14px;color:{_T2};margin:0;line-height:1.5'>{reason}</p>"
        f"</div></div>"
    )


def _severity_pill(sev: str) -> str:
    dark_colors = {
        "CRITICAL": (_ERR_FG,  _ERR_BG),
        "HIGH":     ("#ffb3b8", "#3b0d0e"),
        "MEDIUM":   (_WARN_FG, _WARN_BG),
        "LOW":      (_BLUE_LNK, "#001141"),
    }
    fg, bg = dark_colors.get(sev, (_T3, _L2))
    return (
        f"<span style='font-family:{_MONO};font-size:11px;font-weight:500;"
        f"background:{bg};color:{fg};padding:1px 6px;letter-spacing:0.16px'>{sev}</span>"
    )


def render_findings_html(rule_ids: list[str], summary: dict) -> str:
    failed = summary.get("failed", len(rule_ids))
    crit   = int(summary.get("CRITICAL", 0))
    high   = int(summary.get("HIGH",     0))
    med    = int(summary.get("MEDIUM",   0))

    rows = "".join(
        f"<tr><td style='padding:6px 0;border-bottom:1px solid {_L2};"
        f"font-family:{_MONO};font-size:12px;color:{_T2}'>{rid}</td></tr>"
        for rid in rule_ids
    )
    table = (
        f"<table style='width:100%;border-collapse:collapse'>"
        f"<thead><tr><th style='text-align:left;padding:0 0 8px;"
        f"font-family:{_FONT};font-size:11px;font-weight:600;letter-spacing:0.32px;"
        f"text-transform:uppercase;color:{_T3};border-bottom:1px solid {_L3}'>"
        f"Rule ID</th></tr></thead><tbody>{rows}</tbody></table>"
    ) if rule_ids else f"<p style='color:{_T4};font-size:13px;margin:8px 0'>No findings</p>"

    pills = " ".join(filter(None, [
        (_severity_pill("CRITICAL") + f" <b style='font-size:13px;color:{_T1}'>{crit}</b>") if crit else "",
        (_severity_pill("HIGH")     + f" <b style='font-size:13px;color:{_T1}'>{high}</b>") if high else "",
        (_severity_pill("MEDIUM")   + f" <b style='font-size:13px;color:{_T1}'>{med}</b>")  if med  else "",
    ]))

    return (
        f"<div style='font-family:{_FONT};background:{_L1};padding:16px'>"
        f"<div style='display:flex;align-items:baseline;justify-content:space-between;margin-bottom:12px'>"
        f"<span style='font-size:28px;font-weight:300;color:{_T1}'>{failed}</span>"
        f"<span style='font-size:11px;letter-spacing:0.32px;text-transform:uppercase;color:{_T3}'>failed checks</span>"
        f"</div>"
        f"<div style='display:flex;gap:12px;margin-bottom:16px;flex-wrap:wrap'>{pills}</div>"
        f"{table}</div>"
    )


def _details_html(
    parse_ok: bool,
    changed_ratio: float,
    resolved: list[str],
    unresolved: list[str],
    explanation: str,
    risk_notes: list[str],
) -> str:
    def _row(label: str, value: str) -> str:
        return (
            f"<tr>"
            f"<td style='width:160px;padding:8px 0;border-bottom:1px solid {_L2};"
            f"font-size:11px;font-weight:600;letter-spacing:0.32px;text-transform:uppercase;"
            f"color:{_T3};vertical-align:top;font-family:{_FONT}'>{label}</td>"
            f"<td style='padding:8px 0 8px 16px;border-bottom:1px solid {_L2};"
            f"font-size:13px;color:{_T2};font-family:{_MONO}'>{value}</td>"
            f"</tr>"
        )

    def _pill_list(items: list[str], ok: bool) -> str:
        if not items:
            return f"<span style='color:{_T4}'>—</span>"
        fg = _OK_FG if ok else _ERR_FG
        bg = _OK_BG if ok else _ERR_BG
        pills = "".join(
            f"<span style='display:inline-block;margin:2px 4px 2px 0;"
            f"background:{bg};color:{fg};padding:2px 8px;font-size:11px;font-weight:500'>{r}</span>"
            for r in items
        )
        return f"<div style='display:flex;flex-wrap:wrap;gap:2px'>{pills}</div>"

    risks_html = ""
    if risk_notes:
        items = "".join(f"<li style='margin-bottom:4px;color:{_T2}'>{n}</li>" for n in risk_notes)
        risks_html = (
            f"<div style='margin-top:16px;padding:12px;"
            f"background:{_WARN_BG};border-left:3px solid {_WARN_BD}'>"
            f"<p style='font-size:11px;font-weight:600;letter-spacing:0.32px;"
            f"text-transform:uppercase;color:{_WARN_FG};margin:0 0 8px;font-family:{_FONT}'>Risk Notes</p>"
            f"<ul style='margin:0;padding-left:16px;font-size:13px'>{items}</ul>"
            f"</div>"
        )

    expl_html = ""
    if explanation:
        expl_html = (
            f"<div style='margin-top:16px;padding:12px 16px;"
            f"background:{_INFO_BG};border-left:3px solid {_INFO_BD}'>"
            f"<p style='font-size:11px;font-weight:600;letter-spacing:0.32px;"
            f"text-transform:uppercase;color:{_INFO_FG};margin:0 0 6px;font-family:{_FONT}'>Explanation</p>"
            f"<p style='font-size:13px;color:{_T2};margin:0;line-height:1.6;font-family:{_FONT}'>{explanation}</p>"
            f"</div>"
        )

    table = (
        f"<table style='width:100%;border-collapse:collapse;font-family:{_FONT}'>"
        f"{_row('Parse OK',       'Yes' if parse_ok else 'No')}"
        f"{_row('Changed lines',  f'{changed_ratio:.0%}')}"
        f"{_row('Resolved',       _pill_list(resolved,   ok=True))}"
        f"{_row('Unresolved',     _pill_list(unresolved, ok=False))}"
        f"</table>"
    )

    return (
        f"<div style='background:{_L1};padding:16px;font-family:{_FONT}'>"
        f"{table}{expl_html}{risks_html}"
        f"</div>"
    )


def render_result(data: dict) -> tuple[str, str, str, str, str, str]:
    decision   = data.get("decision") or {}
    action     = decision.get("action", "unknown")
    reason     = decision.get("reason", "")
    original   = data.get("original_file", "")
    patch_obj  = decision.get("patch") or {}
    fixed      = patch_obj.get("fixed_file") or data.get("fixed_file", "")

    pre_rules:   list[str] = data.get("pre_rule_ids")  or []
    post_rules:  list[str] = data.get("post_rule_ids") or []
    pre_summary: dict      = data.get("pre_summary")   or {}
    post_summary:dict      = data.get("post_summary")  or {}

    validation     = decision.get("validation") or data.get("validation") or {}
    resolved:   list[str] = validation.get("targeted_resolved")   or []
    unresolved: list[str] = validation.get("targeted_unresolved") or []
    parse_ok:   bool      = validation.get("parse_ok", False)
    changed_ratio: float  = validation.get("changed_lines_ratio", 0.0)
    explanation = patch_obj.get("explanation") or reason
    risk_notes: list[str] = patch_obj.get("risk_notes") or []

    return (
        original,
        fixed,
        _notification_html(action, reason),
        render_findings_html(pre_rules,  pre_summary),
        render_findings_html(post_rules, post_summary),
        _details_html(parse_ok, changed_ratio, resolved, unresolved, explanation, risk_notes),
    )


def error_html(label: str, exc: Exception) -> str:
    return _notification_html("rejected", f"<b>{label}:</b> {exc}")