from __future__ import annotations

from html import escape
import gradio as gr

# Examples cover math, science, reading, and writing support.
EXAMPLE_CARDS = [
    {
        "title": "Fraction Word Problem",
        "grade": "Middle school",
        "mode": "Coach me",
        "text": "A recipe uses 3/4 cup of flour for one batch. How much flour is needed for 2 1/2 batches?",
    },
    {
        "title": "Physics Units",
        "grade": "High school",
        "mode": "Step-by-step",
        "text": "If a bike travels 18 meters in 6 seconds, what is its average speed? I keep mixing up the units.",
    },
    {
        "title": "Reading Evidence",
        "grade": "Middle school",
        "mode": "Hint only",
        "text": "The question asks which sentence best shows the narrator is nervous. How do I choose evidence without guessing?",
    },
    {
        "title": "Essay Thesis",
        "grade": "High school",
        "mode": "Coach me",
        "text": "My essay is about whether school uniforms help students focus. My thesis sounds too broad.",
    },
    {
        "title": "Algebra Check",
        "grade": "High school",
        "mode": "Step-by-step",
        "text": "Solve 2x + 7 = 19. I know the answer is x = 6, but I want to understand the steps.",
    },
    {
        "title": "Science Claim",
        "grade": "Middle school",
        "mode": "Hint only",
        "text": "The lab question asks why metal spoons feel colder than wooden spoons. I need help explaining the idea without memorizing words.",
    },
    {
        "title": "Reading Theme",
        "grade": "Middle school",
        "mode": "Coach me",
        "text": "The story has a character who keeps checking the door and looking at the clock. I need help explaining the mood with evidence.",
    },
    {
        "title": "Geometry Help",
        "grade": "High school",
        "mode": "Step-by-step",
        "text": "A triangle has angles 45 degrees and 65 degrees. What is the third angle, and why?",
    },
    {
        "title": "Statistics Question",
        "grade": "College",
        "mode": "Coach me",
        "text": "My dataset has a mean of 14 and a median of 9. How do I explain what that says about the shape of the data?",
    },
    {
        "title": "Parent Note",
        "grade": "Elementary",
        "mode": "Hint only",
        "text": "My child says 9 minus 4 equals 6. I want help giving a calm hint instead of just correcting them.",
    },
    {
        "title": "Equation Steps",
        "grade": "High school",
        "mode": "Coach me",
        "text": "Can you show me how to solve 3(2x - 5) = 21 without jumping straight to the answer?",
    },
    {
        "title": "Lab Result",
        "grade": "College",
        "mode": "Step-by-step",
        "text": "My chemistry lab data has weird outliers. How do I explain what might be happening without sounding vague?",
    },
    {
        "title": "History Claim",
        "grade": "Middle school",
        "mode": "Hint only",
        "text": "The prompt asks how the setting affects the story. I know where it happens, but I do not know how to turn that into evidence.",
    },
    {
        "title": "Word Problem",
        "grade": "Elementary",
        "mode": "Coach me",
        "text": "There are 24 apples and 6 baskets. If the apples are shared equally, how many go in each basket?",
    },
    {
        "title": "Ratio Reasoning",
        "grade": "Middle school",
        "mode": "Step-by-step",
        "text": "A map uses a scale of 1 inch to 5 miles. If two towns are 3.5 inches apart on the map, how far apart are they in real life?",
    },
    {
        "title": "Poem Tone",
        "grade": "High school",
        "mode": "Hint only",
        "text": "The poem uses dark weather and broken glass imagery. How do I explain the tone without sounding too dramatic?",
    },
]


def _example_card_html(title: str, grade: str, text: str) -> str:
    """Builds a compact example card with clear grade context."""
    return (
        '<div class="pt-example-copy">'
        '<div class="pt-example-head">'
        f"<span>{escape(title)}</span>"
        f"<strong>{escape(grade)}</strong>"
        "</div>"
        f"<p>{escape(text)}</p>"
        "</div>"
    )


def _select_example(
    text: str, grade: str, mode: str
) -> tuple[None, str, None, str, str]:
    """Populates the tutor form from an example card."""
    return None, text, None, grade, mode


def render_examples(
    image_input: gr.Image,
    question_input: gr.Textbox,
    audio_input: gr.Audio,
    grade_input: gr.Radio,
    mode_input: gr.Radio,
) -> gr.Column:
    """Renders examples and wires card buttons to the tutor form."""
    with gr.Column(elem_classes=["pt-examples-section"]) as section:
        gr.Markdown("## Example Situations")
        with gr.Row(elem_classes=["pt-example-grid"]):
            for example in EXAMPLE_CARDS:
                with gr.Column(elem_classes=["pt-example-card"]):
                    gr.HTML(
                        _example_card_html(
                            str(example["title"]),
                            str(example["grade"]),
                            str(example["text"]),
                        )
                    )
                    use_example = gr.Button(
                        "Use example",
                        size="sm",
                        elem_classes=["pt-example-btn"],
                    )
                    use_example.click(
                        fn=lambda text=str(example["text"]), grade=str(example["grade"]), mode=str(example["mode"]): (
                            _select_example(text, grade, mode)
                        ),
                        inputs=[],
                        outputs=[
                            image_input,
                            question_input,
                            audio_input,
                            grade_input,
                            mode_input,
                        ],
                        queue=False,
                    )
    return section