#!/usr/bin/env python3
"""Micro API for landing page — reads live agent configs and returns JSON."""
import json, os, glob, re
from datetime import datetime, timezone
import socketserver
import http.server

PORT = 8080
FALLBACK_DIR = "/usr/share/nginx/html"


def find_dir(sub):
    candidates = [
        os.path.join(FALLBACK_DIR, sub),
        os.path.join(os.path.dirname(__file__), sub),
        f"/app/{sub}",
        f"./{sub}",
    ]
    for c in candidates:
        if os.path.isdir(c):
            return c
    return None


def find_file(name):
    candidates = [
        os.path.join(FALLBACK_DIR, "api", name),
        os.path.join(os.path.dirname(__file__), name),
        f"/app/landing/api/{name}",
    ]
    for c in candidates:
        if os.path.isfile(c):
            return c
    return None


def parse_frontmatter(path):
    try:
        with open(path, "r", encoding="utf-8") as f:
            content = f.read()
    except Exception:
        return None
    if not content.startswith("---"):
        return None
    end = content.find("---", 3)
    if end == -1:
        return None
    fm = content[3:end]
    data = {}
    for line in fm.strip().split("\n"):
        m = re.match(r"^(\w+):\s*(.+)$", line)
        if m:
            data[m.group(1)] = m.group(2).strip()
    return data


def load_dashboard_data():
    path = find_file("dashboard-data.json")
    if not path:
        return None
    try:
        with open(path, "r", encoding="utf-8") as f:
            data = json.load(f)
        if data.get("agents"):
            return data
    except Exception:
        pass
    return None


def load_real_fit_scores():
    candidates = [
        os.path.join(os.path.dirname(__file__), "real-fit-report.json"),
        os.path.join(os.path.dirname(os.path.dirname(__file__)), "data", "real-fit-report.json"),
        os.path.join(FALLBACK_DIR, "data", "real-fit-report.json"),
        "/app/agent-evolution/data/real-fit-report.json",
    ]
    for path in candidates:
        if path and os.path.isfile(path):
            try:
                with open(path, "r", encoding="utf-8") as f:
                    data = json.load(f)
                return data.get("fit_scores", {})
            except Exception:
                continue
    return {}


def build_state_from_md():
    agents_dir = find_dir(".kilo/agents")
    commands_dir = find_dir(".kilo/commands")

    agents = []
    if agents_dir:
        for f in sorted(glob.glob(os.path.join(agents_dir, "*.md"))):
            fm = parse_frontmatter(f)
            if fm and fm.get("model"):
                agents.append({
                    "name": os.path.basename(f).replace(".md", ""),
                    "model": fm.get("model", ""),
                    "mode": fm.get("mode", "subagent"),
                    "description": fm.get("description", ""),
                    "category": infer_category(fm.get("mode", ""), os.path.basename(f)),
                    "fit_score": None,
                    "model_meta": None,
                })

    commands = []
    if commands_dir:
        for f in sorted(glob.glob(os.path.join(commands_dir, "*.md"))):
            fm = parse_frontmatter(f)
            if fm and fm.get("model"):
                commands.append({
                    "name": os.path.basename(f).replace(".md", ""),
                    "model": fm.get("model", ""),
                    "mode": fm.get("mode", "command"),
                    "description": fm.get("description", ""),
                    "fit_score": None,
                })

    model_stats = {}
    for a in agents:
        model_stats[a["model"]] = model_stats.get(a["model"], 0) + 1
    for c in commands:
        model_stats[c["model"]] = model_stats.get(c["model"], 0) + 1

    return {
        "generated": datetime.now(timezone.utc).isoformat().replace("+00:00", "") + "Z",
        "total_agents": len(agents),
        "total_commands": len(commands),
        "model_distribution": model_stats,
        "agents": agents,
        "commands": commands,
    }


def build_state():
    dashboard = load_dashboard_data()
    fit_scores = load_real_fit_scores()
    if dashboard:
        agents = dashboard.get("agents", [])
        for a in agents:
            key = a.get("name")
            fs = fit_scores.get(key)
            if fs:
                a["fit_score"] = fs.get("fit")
                a["fit_explanation"] = fs.get("explanation")
                a["best_model"] = fs.get("model")
        state = {
            "generated": datetime.now(timezone.utc).isoformat().replace("+00:00", "") + "Z",
            "total_agents": dashboard.get("total_agents", 0),
            "total_commands": len(dashboard.get("commands", [])),
            "model_distribution": dashboard.get("model_distribution", {}),
            "agents": agents,
            "commands": dashboard.get("commands", []),
        }
        state["fit_scores"] = fit_scores
        return state
    return build_state_from_md()


def infer_category(mode, filename):
    f = filename.lower()
    if "security" in f:
        return "Security"
    if "devops" in f:
        return "DevOps"
    if "frontend" in f or "flutter" in f:
        return "Frontend"
    if "backend" in f or "php" in f or "python" in f or "go" in f:
        return "Backend"
    if "test" in f or "sdet" in f:
        return "QA"
    return "Core"


class Handler(http.server.BaseHTTPRequestHandler):
    def do_GET(self):
        if self.path == "/api/state":
            state = build_state()
            body = json.dumps(state, ensure_ascii=False).encode("utf-8")
            self.send_response(200)
            self.send_header("Content-Type", "application/json; charset=utf-8")
            self.send_header("Access-Control-Allow-Origin", "*")
            self.send_header("Cache-Control", "no-store")
            self.end_headers()
            self.wfile.write(body)
        else:
            self.send_response(404)
            self.end_headers()

    def log_message(self, format, *args):
        pass  # silent


if __name__ == "__main__":
    with socketserver.TCPServer(("0.0.0.0", PORT), Handler) as httpd:
        print(f"[state-api] listening on :{PORT}")
        httpd.serve_forever()