import dataclasses
from typing import Annotated

from fastapi import HTTPException, Request
from fastapi.params import Form
from fastapi.responses import HTMLResponse
from folkugat_web.api import router
from folkugat_web.fragments import temes
from folkugat_web.fragments.tema import scores as scores_fragments
from folkugat_web.services import auth, files
from folkugat_web.services.lilypond import build as lilypond_build
from folkugat_web.services.lilypond import render as lilypond_render
from folkugat_web.services.lilypond import source as lilypond_source
from folkugat_web.services.temes import scores as scores_service


@router.get("/api/tema/{tema_id}/score/{score_id}")
def score(request: Request, logged_in: auth.LoggedIn, tema_id: int, score_id: int):
    score = scores_service.get_score_by_id(score_id=score_id, tema_id=tema_id)
    if not score:
        raise HTTPException(status_code=404, detail="Could not find lyric!")
    return scores_fragments.score(request=request, logged_in=logged_in, score=score)


@router.put("/api/tema/{tema_id}/score/{score_id}")
async def set_score(
    request: Request,
    logged_in: auth.RequireLogin,
    tema_id: int,
    score_id: int,
    title: Annotated[str, Form()],
    source: Annotated[str, Form()],
):
    source = source.strip()
    score = scores_service.get_score_by_id(score_id=score_id, tema_id=tema_id)
    if not score:
        raise HTTPException(status_code=404, detail="Could not find lyric!")

    tune = lilypond_build.tune_from_tema_id(tema_id=tema_id, score_source=source)
    tune_source = lilypond_source.tune_source(tune=tune)
    pdf_result, png_result = await render_tune(tune_source=tune_source, tema_id=tema_id)
    if errors := pdf_result.error:
        new_score = dataclasses.replace(
            score,
            source=source,
            title=title,
            errors=errors,
        )
    elif png_result is None:
        raise RuntimeError(f"Received empty png_result with pdf_result: {pdf_result}")
    elif errors := png_result.error:
        new_score = dataclasses.replace(
            score,
            source=source,
            title=title,
            errors=errors,
        )
    else:
        pdf_file = pdf_result.result
        png_file = png_result.result
        new_score = dataclasses.replace(
            score,
            source=source,
            title=title,
            pdf_url=files.get_db_file_path(pdf_file) if pdf_file else None,
            img_url=files.get_db_file_path(png_file) if png_file else None,
            errors=[],
        )
    scores_service.update_score(score=new_score)
    files.clean_orphan_files()
    return scores_fragments.score(request=request, logged_in=logged_in, score=new_score)


async def render_tune(
    tune_source: str,
    tema_id: int,
) -> tuple[lilypond_render.RenderResult, lilypond_render.RenderResult | None]:
    async with files.tmp_file(content=tune_source) as source_file:
        pdf_file = files.create_tema_filename(tema_id=tema_id)
        pdf_result = await lilypond_render.render_file(
            input_file=source_file,
            output=lilypond_render.RenderOutput.PDF,
            output_file=pdf_file,
        )
        if pdf_result.error:
            return pdf_result, None
        png_file = files.create_tema_filename(tema_id=tema_id)
        png_result = await lilypond_render.render_file(
            input_file=source_file,
            output=lilypond_render.RenderOutput.PNG_CROPPED,
            output_file=png_file,
        )
        return pdf_result, png_result


@router.post("/api/tema/{tema_id}/score")
def add_score(
    request: Request,
    logged_in: auth.RequireLogin,
    tema_id: int,
):
    score = scores_service.create_score(tema_id=tema_id)
    return scores_fragments.score_editor(
        request=request,
        logged_in=logged_in,
        score=score,
    )


@router.delete("/api/tema/{tema_id}/score/{score_id}")
def delete_score(request: Request, logged_in: auth.RequireLogin, tema_id: int, score_id: int):
    scores_service.delete_score(score_id=score_id, tema_id=tema_id)
    files.clean_orphan_files()
    return HTMLResponse()


@router.get("/api/tema/{tema_id}/editor/score/{score_id}")
def score_editor(
    request: Request,
    logged_in: auth.RequireLogin,
    tema_id: int,
    score_id: int,
):
    score = scores_service.get_score_by_id(score_id=score_id, tema_id=tema_id)
    if not score:
        raise HTTPException(status_code=404, detail="Could not find lyric!")
    return scores_fragments.score_editor(
        request=request,
        logged_in=logged_in,
        score=score,
    )


@router.post("/api/tema/{tema_id}/editor/score/{score_id}/render")
async def render(
    request: Request,
    _: auth.RequireLogin,
    tema_id: int,
    score_id: int,
    source: Annotated[str, Form()],
):
    tune = lilypond_build.tune_from_tema_id(tema_id=tema_id, score_source=source)
    full_source = lilypond_source.tune_source(tune=tune)
    png_result = await lilypond_render.render(
        source=full_source,
        output=lilypond_render.RenderOutput.PNG_CROPPED,
    )
    if output_filename := png_result.result:
        score_render_url = files.get_db_file_path(output_filename)
        return temes.score_render(request=request, score_id=score_id, score_render_url=score_render_url)
    else:
        return temes.score_render(request=request, score_id=score_id, errors=png_result.error)


@router.put("/api/tema/{tema_id}/score/{score_id}/show")
async def show_score(
    request: Request,
    logged_in: auth.RequireLogin,
    tema_id: int,
    score_id: int,
):
    score = scores_service.get_score_by_id(score_id=score_id, tema_id=tema_id)
    if not score:
        raise HTTPException(status_code=404, detail="Could not find lyric!")
    new_score = dataclasses.replace(score, hidden=False)
    scores_service.update_score(score=new_score)
    return scores_fragments.score(request=request, logged_in=logged_in, score=new_score)


@router.put("/api/tema/{tema_id}/score/{score_id}/hide")
async def hide_score(
    request: Request,
    logged_in: auth.RequireLogin,
    tema_id: int,
    score_id: int,
):
    score = scores_service.get_score_by_id(score_id=score_id, tema_id=tema_id)
    if not score:
        raise HTTPException(status_code=404, detail="Could not find lyric!")
    new_score = dataclasses.replace(score, hidden=True)
    scores_service.update_score(score=new_score)
    return scores_fragments.score(request=request, logged_in=logged_in, score=new_score)