import os
from pathlib import Path
from fastapi import FastAPI
from fastapi.staticfiles import StaticFiles
import flet as ft
import flet.fastapi as flet_fastapi

import designer as d
import theme_manager
from router import handle_route
from editor_page import router as editor_router
from public_pages import router as public_router

UPLOAD_DIR = os.getenv("FLET_UPLOAD_DIR", "/tmp/flet_uploads")
os.makedirs(UPLOAD_DIR, exist_ok=True)


async def main(page: ft.Page):
    page.title = "Новости"
    page.padding = 0
    page.spacing = 0
    page.window.width = 1280
    page.window.min_width = 360

    page.fonts = {
        "Merriweather": "https://cdn.jsdelivr.net/npm/@fontsource/merriweather@latest/files/merriweather-latin-400-normal.woff2",
        "Inter": "https://cdn.jsdelivr.net/npm/@fontsource/inter@latest/files/inter-latin-400-normal.woff2",
        "Playfair Display": "https://cdn.jsdelivr.net/npm/@fontsource/playfair-display@latest/files/playfair-display-latin-400-normal.woff2",
        "JetBrains Mono": "https://cdn.jsdelivr.net/npm/@fontsource/jetbrains-mono@latest/files/jetbrains-mono-latin-400-normal.woff2",
        "Roboto": "https://cdn.jsdelivr.net/npm/@fontsource/roboto@latest/files/roboto-latin-400-normal.woff2",
    }

    theme_manager.apply(page, "light")

    async def on_route_change(e: ft.RouteChangeEvent):
        theme_manager.reset_font(page)
        await handle_route(page)

    def on_view_pop(e: ft.ViewPopEvent):
        page.views.pop()
        if page.views:
            page.go(page.views[-1].route)

    page.on_route_change = on_route_change
    page.on_view_pop = on_view_pop

    await handle_route(page)


# Custom routes must be registered on a WRAPPER app BEFORE mounting Flet.
# flet_fastapi registers a catch-all handler internally; anything added to
# the same app via include_router() ends up AFTER that catch-all and is
# never reached. The wrapper ensures our routes are checked first.
_flet = flet_fastapi.app(main, upload_dir=UPLOAD_DIR)

app = FastAPI()
app.include_router(public_router)   # GET /article/{slug}
app.include_router(editor_router)   # GET /editor/{id}  +  /api/* proxy

# Serve React editor static assets (JS/CSS chunks built by Vite)
_editor_dist = Path(__file__).parent / "editor-ui" / "dist"
if _editor_dist.exists():
    app.mount("/editor-assets", StaticFiles(directory=str(_editor_dist)), name="editor-assets")

app.mount("/", _flet)               # everything else → Flet SPA