"""Render a schema-valid case+note dict into classroom-ready Markdown.

The hero of Case Forge is that the output is *usable in class*, not a wall of
JSON. This turns the contract (`data/schema.py`) into a well-structured case and
teaching note, and surfaces the genre's quality checks as visible badges.
"""

from __future__ import annotations

# Section labels per language (UI chrome lives in shared/i18n; these are the
# document headings, kept next to the renderer that emits them).
_L = {
    "case": {
        "en": {
            "decision": "The decision", "protagonist": "Protagonist",
            "context": "Context", "data": "Data & evidence",
            "exhibits": "Exhibits", "alternatives": "Paths to weigh",
            "closing": "Where it stands", "references": "References",
        },
        "pt": {
            "decision": "A decisão", "protagonist": "Protagonista",
            "context": "Contexto", "data": "Dados e evidências",
            "exhibits": "Anexos", "alternatives": "Caminhos a ponderar",
            "closing": "Onde isso para", "references": "Referências",
        },
    },
    "note": {
        "en": {
            "title": "Teaching note", "summary": "Summary",
            "audience": "Audience", "relevance": "Managerial relevance",
            "objectives": "Learning objectives", "sources": "Data sources",
            "anchor": "Theoretical anchor", "plan": "Discussion plan",
            "questions": "Discussion questions", "analysis": "Analysis & expected answers",
            "closure": "Closure", "epilogue": "Epilogue", "biblio": "Bibliography",
            "min": "min",
        },
        "pt": {
            "title": "Nota de ensino", "summary": "Resumo",
            "audience": "Público-alvo", "relevance": "Relevância gerencial",
            "objectives": "Objetivos de aprendizagem", "sources": "Fontes dos dados",
            "anchor": "Ancoragem teórica", "plan": "Plano de discussão",
            "questions": "Questões de discussão", "analysis": "Análise e respostas esperadas",
            "closure": "Fechamento", "epilogue": "Epílogo", "biblio": "Bibliografia",
            "min": "min",
        },
    },
}


def _lang(obj: dict) -> str:
    return obj.get("language") if obj.get("language") in ("pt", "en") else "pt"


def render_case(obj: dict) -> str:
    """The case itself, as Markdown — stops at the decision point."""
    if not obj:
        return ""
    lang = _lang(obj)
    L = _L["case"][lang]
    c = obj.get("case") or {}
    out: list[str] = []

    out.append(f"# {obj.get('title', '').strip()}")
    domain = obj.get("domain", "").strip()
    if domain:
        out.append(f"*{domain}*")
    out.append("")
    if c.get("hook"):
        out.append(c["hook"].strip())
        out.append("")
    if c.get("protagonist"):
        out.append(f"**{L['protagonist']}:** {c['protagonist'].strip()}")
        out.append("")
    if c.get("decision_point"):
        out.append(f"> **{L['decision']}:** {c['decision_point'].strip()}")
        out.append("")
    if c.get("context"):
        out.append(f"## {L['context']}")
        out.append(c["context"].strip())
        out.append("")
    if c.get("data"):
        out.append(f"## {L['data']}")
        out += [f"- {d.strip()}" for d in c["data"]]
        out.append("")
    if c.get("exhibits"):
        out.append(f"## {L['exhibits']}")
        for ex in c["exhibits"]:
            out.append(f"**{ex.get('title', '').strip()}**")
            out.append("")
            out.append(str(ex.get("content", "")).strip())
            out.append("")
    if c.get("alternatives"):
        out.append(f"## {L['alternatives']}")
        out += [f"- {a.strip()}" for a in c["alternatives"]]
        out.append("")
    if c.get("closing"):
        out.append(f"## {L['closing']}")
        out.append(c["closing"].strip())
        out.append("")
    if c.get("references"):
        out.append(f"## {L['references']}")
        out += [f"- {r.strip()}" for r in c["references"]]
        out.append("")
    return "\n".join(out).strip()


def render_note(obj: dict) -> str:
    """The teaching note, as Markdown — instructor-facing (the epilogue lives here)."""
    if not obj:
        return ""
    lang = _lang(obj)
    L = _L["note"][lang]
    n = obj.get("teaching_note") or {}
    out: list[str] = [f"# {L['title']}", ""]

    def block(label_key: str, text):
        if text:
            out.append(f"## {L[label_key]}")
            out.append(str(text).strip())
            out.append("")

    def bullets(label_key: str, items, ordered=False):
        if items:
            out.append(f"## {L[label_key]}")
            for i, it in enumerate(items, 1):
                out.append(f"{i}. {str(it).strip()}" if ordered else f"- {str(it).strip()}")
            out.append("")

    block("summary", n.get("summary"))
    block("audience", n.get("audience"))
    block("relevance", n.get("managerial_relevance"))
    bullets("objectives", n.get("learning_objectives"), ordered=True)
    block("sources", n.get("data_sources"))
    bullets("anchor", n.get("theoretical_anchor"))

    plan = n.get("discussion_plan") or []
    if plan:
        out.append(f"## {L['plan']}")
        for b in plan:
            mins = b.get("minutes")
            head = f"**{b.get('block', '').strip()}**"
            if mins:
                head += f" — {mins} {L['min']}"
            out.append(head)
            if b.get("activity"):
                out.append(f"  {b['activity'].strip()}")
            out.append("")

    bullets("questions", n.get("discussion_questions"), ordered=True)
    block("analysis", n.get("analysis"))
    block("closure", n.get("closure"))
    block("epilogue", n.get("epilogue"))
    bullets("biblio", n.get("bibliography"))
    return "\n".join(out).strip()


def quality_flags(obj: dict, errors: list[str], warnings: list[str]) -> dict[str, bool]:
    """Map the validator result to the four classroom quality checks the UI shows."""
    note = (obj or {}).get("teaching_note") or {}
    objs = note.get("learning_objectives") or []
    leak = any("revelar a decisão" in w or "reveal" in w.lower() for w in warnings)
    no_source = any("citar fonte" in w or "sourced" in w.lower() for w in warnings)
    return {
        "schema": not errors,
        "noleak": not leak,
        "objectives": 1 <= len(objs) <= 4,
        "sourced": not no_source,
    }


__all__ = ["render_case", "render_note", "quality_flags"]