#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
================================================================================
 HFChart — plateforme de référence des charts haute fréquence
 Hôte statique minimal (stdlib uniquement).

 Les données des graphs proviennent de l'API HF Market Data :
   https://www.hfmarketdata.io  (interrogée directement par le navigateur)

 Author  : Simon-Pierre Boucher
 Contact : contact@spboucher.ai
================================================================================

  python3 server.py [port]        # défaut: 8787
"""
import os
import sys
from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
from urllib.parse import urlparse

ROOT = os.path.dirname(os.path.abspath(__file__))
WEB = os.path.join(ROOT, "web")

MIME = {
    ".html": "text/html; charset=utf-8",
    ".js": "application/javascript; charset=utf-8",
    ".css": "text/css; charset=utf-8",
    ".json": "application/json; charset=utf-8",
    ".svg": "image/svg+xml",
    ".png": "image/png",
    ".ico": "image/x-icon",
    ".webmanifest": "application/manifest+json",
}


# /embed.js = moteur complet concaténé (transforms + indicateurs + renderers +
# engine + bootstrapper d'embed) — un seul <script> pour les snippets exportés.
EMBED_PARTS = ["js/transforms.js", "js/indicators.js", "js/renderers.js",
               "js/engine.js", "js/embed-boot.js"]
_embed_cache = {"key": None, "body": b""}


def embed_js():
    paths = [os.path.join(WEB, p) for p in EMBED_PARTS]
    key = tuple(os.path.getmtime(p) for p in paths)
    if _embed_cache["key"] != key:
        chunks = [b"/* HFChart embed bundle - Simon-Pierre Boucher - "
                  b"contact@spboucher.ai - https://www.hfchart.io */\n"]
        for p in paths:
            with open(p, "rb") as fh:
                chunks.append(fh.read())
            chunks.append(b"\n;\n")
        _embed_cache["key"] = key
        _embed_cache["body"] = b"".join(chunks)
    return _embed_cache["body"]


class Handler(BaseHTTPRequestHandler):
    protocol_version = "HTTP/1.1"

    def log_message(self, fmt, *args):
        sys.stderr.write("[hfchart] %s\n" % (fmt % args))

    def _send(self, code, body, mime="text/plain; charset=utf-8", cache="no-cache"):
        self.send_response(code)
        self.send_header("Content-Type", mime)
        self.send_header("Content-Length", str(len(body)))
        self.send_header("Cache-Control", cache)
        self.end_headers()
        self.wfile.write(body)

    def do_GET(self):
        try:
            path = urlparse(self.path).path
            if path == "/health":
                return self._send(200, b'{"status":"ok","service":"hfchart"}',
                                  "application/json; charset=utf-8")
            if path == "/embed.js":
                self.send_response(200)
                self.send_header("Content-Type", MIME[".js"])
                body = embed_js()
                self.send_header("Content-Length", str(len(body)))
                self.send_header("Cache-Control", "public, max-age=300")
                self.send_header("Access-Control-Allow-Origin", "*")
                self.end_headers()
                self.wfile.write(body)
                return None
            if path == "/":
                path = "/index.html"
            fp = os.path.normpath(os.path.join(WEB, path.lstrip("/")))
            if not fp.startswith(WEB) or not os.path.isfile(fp):
                return self._send(404, b"not found")
            with open(fp, "rb") as fh:
                body = fh.read()
            return self._send(200, body, MIME.get(os.path.splitext(fp)[1],
                                                  "application/octet-stream"))
        except BrokenPipeError:
            pass


def main():
    port = int(sys.argv[1]) if len(sys.argv) > 1 else 8787
    print(f"HFChart — http://localhost:{port}  (données : https://www.hfmarketdata.io)")
    ThreadingHTTPServer(("0.0.0.0", port), Handler).serve_forever()


if __name__ == "__main__":
    main()