"""The data contract for the card UI — and the STUB provider that fills it with fake data.

THIS IS THE BACKEND ADOPTION SEAM. The UI renders whatever `CardData` it is handed; it does
not care where the numbers came from. To go live, the backend replaces `get_stub_card()` with
a real builder that returns a `CardData`, and feeds `ProcessingFacts` from real progress.
Nothing in `screens/` or `components/` needs to change.
"""
from __future__ import annotations

from dataclasses import dataclass, field

# Canonical axis order. Display name -> used everywhere (radar labels, bars, accordions).
AXES = ["Focus", "Technique", "Critical", "Interaction", "Input Quality"]

# Tier ramp: (min_inclusive, letter, hex color). Checked high-to-low.
TIERS = [
    (8.5, "S", "#A78BFA"),
    (7.0, "A", "#E8B84B"),
    (5.5, "B", "#C7CDD6"),
    (4.0, "C", "#B08D57"),
    (0.0, "D", "#6B7280"),
]


@dataclass
class Axis:
    """One scored axis. `confidence` is one of 'high' | 'medium' | 'low'."""
    name: str
    score: float            # 0-10
    confidence: str         # high | medium | low
    evidence: list[str]     # quoted user turns shown in the drilldown accordion
    tip: str                # one-line improvement hint


@dataclass
class CriticalBreakdown:
    """Counts behind the Critical axis, shown on the card back."""
    skepticism: int
    source_req: int
    rebuttal: int
    verify: int
    re_ask: int

    def as_pairs(self) -> list[tuple[str, int]]:
        return [
            ("skepticism", self.skepticism),
            ("source-req", self.source_req),
            ("rebuttal", self.rebuttal),
            ("verify", self.verify),
            ("re-ask", self.re_ask),
        ]


@dataclass
class CardData:
    """Everything the result screen needs to render one card."""
    name: str
    axes: list[Axis]
    critical: CriticalBreakdown
    improvement: str
    # scoring provenance for the honesty tag: "placeholder" (DummyScorer) | "real-base" (MiniCPM-8B)
    # | "real-lora" (MiniCPM-8B + the locked LoRA hybrid). Set by app.py from the active scorer.
    provenance: str = "placeholder"
    # True when scored from a single pasted conversation (quick demo) vs a full export. The card-design
    # session keys "Sample analysis" framing off this; the result screen shows a scope disclaimer.
    single_conversation: bool = False

    @property
    def overall(self) -> float:
        return round(sum(a.score for a in self.axes) / len(self.axes), 1)

    @property
    def tier(self) -> tuple[str, str]:
        """Returns (letter, hex_color) for the current overall."""
        ovr = self.overall
        for minimum, letter, color in TIERS:
            if ovr >= minimum:
                return letter, color
        return TIERS[-1][1], TIERS[-1][2]

    def radar_scores(self) -> list[float]:
        return [a.score for a in self.axes]


@dataclass
class ProcessingFacts:
    """Fake facts revealed one at a time on the processing screen.

    Backend swap: feed real values (or stream real progress events) instead of these stubs.
    """
    export_label: str = "ChatGPT export detected"
    turns_total: int = 1204
    date_range: str = "Mar 2024 – Jun 2026"
    english_scored: int = 1050
    other_unscored: int = 154
    highlight: str = "Most active on Tuesday nights"


# --------------------------------------------------------------------------------------
# STUB DATA — fake, fixed. Replace these two providers to integrate the real backend.
# --------------------------------------------------------------------------------------

def get_stub_card(name: str = "") -> CardData:
    """Fixed fake card. Scores: Focus 8 / Technique 6 / Critical 9 / Interaction 5 /
    Input Quality 7 -> mean 7.0 -> tier A."""
    return CardData(
        name=(name or "").strip() or "Anonymous",
        axes=[
            Axis(
                "Focus", 8, "low",
                ['"let\'s keep this thread strictly about the migration script"',
                 '"ignore the earlier tangent — back to the failing test"'],
                "Open a fresh chat per task to keep each thread on one goal.",
            ),
            Axis(
                "Technique", 6, "high",
                ['"act as a senior reviewer and critique this diff"',
                 '"give me 3 options, then we pick"'],
                "Try few-shot examples for formatting-heavy asks.",
            ),
            Axis(
                "Critical", 9, "high",
                ['"that benchmark looks cherry-picked — what\'s the baseline?"',
                 '"cite the source before I trust that number"'],
                "Keep pushing back; maybe verify claims against a second source.",
            ),
            Axis(
                "Interaction", 5, "medium",
                ['"can you walk me through why, step by step?"'],
                "Ask follow-ups that build on the model\'s reasoning, not just redo it.",
            ),
            Axis(
                "Input Quality", 7, "medium",
                ['"context: Python 3.12, FastAPI, here\'s the failing trace …"',
                 '"constraints: no new deps, must stay under 400 lines"'],
                "Lead with role + constraints + a concrete example for richer prompts.",
            ),
        ],
        critical=CriticalBreakdown(skepticism=14, source_req=6, rebuttal=9, verify=4, re_ask=3),
        improvement="Biggest lever: tighten focus — split multi-topic chats into separate threads.",
    )


def get_stub_facts() -> ProcessingFacts:
    return ProcessingFacts()