"""Dialogue de configuration admin — accessible par appui long sur le titre."""

import json
import os
from PyQt6.QtWidgets import (
    QDialog, QVBoxLayout, QHBoxLayout, QGridLayout,
    QLineEdit, QPushButton, QLabel, QComboBox, QScrollArea, QWidget,
    QSpinBox, QCheckBox
)
from PyQt6.QtCore import Qt
from PyQt6.QtGui import QFont

CONFIG_PATH = os.path.join(
    os.path.dirname(__file__), "..", "..", "..", "config", "settings.json"
)

DEFAULT_CONFIG = {
    # WiFi hotspot
    "wifi_ap_name": "Photostation",
    "wifi_ap_password": "photo1234",
    # Serveur upload
    "server_ip": "0.0.0.0",
    "server_port": 8080,
    "upload_url": "https://photo.copydev.fr/upload",
    # Email IMAP
    "email_address": "photo@photostation.local",
    "imap_enabled": False,
    "imap_server": "",
    "imap_port": 993,
    "imap_user": "",
    "imap_password": "",
    "imap_folder": "INBOX",
    "imap_interval": 30,
    # Formats d'impression (activable + imprimante par format)
    "formats": {
        "10x15": {"enabled": True, "printer": "", "ratio": 1.5},
        "13x18": {"enabled": False, "printer": "", "ratio": 1.385},
        "15x20": {"enabled": False, "printer": "", "ratio": 1.333},
    },
    # Tarification
    "pricing": {
        "enabled": True,
        "currency": "€",
        "tiers": [
            {"from": 1, "to": 5, "price": 0.50},
            {"from": 6, "to": 10, "price": 0.40},
            {"from": 11, "to": 999, "price": 0.30},
        ],
    },
}


def load_config():
    try:
        with open(CONFIG_PATH, "r") as f:
            saved = json.load(f)
            config = dict(DEFAULT_CONFIG)
            config.update(saved)
            return config
    except (FileNotFoundError, json.JSONDecodeError):
        return dict(DEFAULT_CONFIG)


def calculate_price(quantity, config=None):
    """Calcule le prix total pour une quantité donnée selon les paliers."""
    if config is None:
        config = load_config()
    pricing = config.get("pricing", DEFAULT_CONFIG.get("pricing", {}))
    if not pricing.get("enabled", False) or quantity <= 0:
        return 0.0
    tiers = pricing.get("tiers", [])
    # Trouver le palier applicable
    unit_price = 0.0
    for tier in tiers:
        if tier["from"] <= quantity <= tier["to"]:
            unit_price = tier["price"]
            break
    if unit_price == 0.0 and tiers:
        unit_price = tiers[-1]["price"]
    return quantity * unit_price


def save_config(config):
    os.makedirs(os.path.dirname(CONFIG_PATH), exist_ok=True)
    with open(CONFIG_PATH, "w") as f:
        json.dump(config, f, indent=2, ensure_ascii=False)


class ConfigDialog(QDialog):
    """Panneau de configuration admin — plein écran, responsive."""

    def __init__(self, parent=None):
        super().__init__(parent)
        self.setWindowTitle("Configuration — Admin")
        self.config = load_config()
        self._setup_ui()

    def showEvent(self, event):
        super().showEvent(event)
        if self.parent():
            self.setGeometry(self.parent().rect())
        self.setStyleSheet("ConfigDialog { background-color: #f0f0f0; }")

    def _section_title(self, text):
        lbl = QLabel(text)
        lbl.setFont(QFont("", 13, QFont.Weight.Bold))
        lbl.setStyleSheet("color: #2196F3; padding-top: 5px;")
        return lbl

    def _label(self, text):
        lbl = QLabel(text)
        lbl.setFont(QFont("", 12))
        lbl.setAlignment(Qt.AlignmentFlag.AlignRight | Qt.AlignmentFlag.AlignVCenter)
        return lbl

    def _input(self, value, placeholder=""):
        inp = QLineEdit(str(value))
        inp.setFont(QFont("", 12))
        inp.setMinimumHeight(35)
        inp.setStyleSheet("""
            QLineEdit {
                border: 2px solid #ccc; border-radius: 6px;
                padding: 5px 10px; background: white;
            }
            QLineEdit:focus { border-color: #2196F3; }
        """)
        if placeholder:
            inp.setPlaceholderText(placeholder)
        return inp

    def _password_input(self, value):
        inp = self._input(value)
        inp.setEchoMode(QLineEdit.EchoMode.Password)
        return inp

    def _spinbox(self, value, min_val, max_val):
        sb = QSpinBox()
        sb.setFont(QFont("", 12))
        sb.setMinimumHeight(35)
        sb.setRange(min_val, max_val)
        sb.setValue(value)
        return sb

    def _setup_ui(self):
        layout = QVBoxLayout(self)
        layout.setContentsMargins(20, 10, 20, 10)
        layout.setSpacing(8)

        title = QLabel("Configuration Photostation")
        title.setFont(QFont("", 18, QFont.Weight.Bold))
        title.setAlignment(Qt.AlignmentFlag.AlignCenter)
        layout.addWidget(title)

        scroll = QScrollArea()
        scroll.setWidgetResizable(True)
        scroll.setHorizontalScrollBarPolicy(Qt.ScrollBarPolicy.ScrollBarAlwaysOff)
        scroll.setStyleSheet("QScrollArea { border: none; }")

        content = QWidget()
        grid = QGridLayout(content)
        grid.setSpacing(8)
        grid.setColumnStretch(0, 1)
        grid.setColumnStretch(1, 2)

        row = 0

        # ── WiFi ──
        grid.addWidget(self._section_title("WiFi (Hotspot)"), row, 0, 1, 2)
        row += 1

        grid.addWidget(self._label("Nom du réseau :"), row, 0)
        self.wifi_name_input = self._input(self.config["wifi_ap_name"])
        grid.addWidget(self.wifi_name_input, row, 1)
        row += 1

        grid.addWidget(self._label("Mot de passe :"), row, 0)
        self.wifi_pass_input = self._input(self.config["wifi_ap_password"])
        grid.addWidget(self.wifi_pass_input, row, 1)
        row += 1

        # ── Serveur upload ──
        grid.addWidget(self._section_title("Serveur upload (QR Code / WiFi)"), row, 0, 1, 2)
        row += 1

        grid.addWidget(self._label("IP d'écoute :"), row, 0)
        self.server_ip_input = self._input(self.config["server_ip"], "0.0.0.0 = toutes les interfaces")
        grid.addWidget(self.server_ip_input, row, 1)
        row += 1

        grid.addWidget(self._label("Port :"), row, 0)
        self.server_port_input = self._spinbox(self.config["server_port"], 80, 65535)
        grid.addWidget(self.server_port_input, row, 1)
        row += 1

        grid.addWidget(self._label("URL publique (QR) :"), row, 0)
        self.upload_url_input = self._input(self.config["upload_url"], "https://photo.exemple.fr/upload")
        grid.addWidget(self.upload_url_input, row, 1)
        row += 1

        # ── Email IMAP ──
        grid.addWidget(self._section_title("Email (réception IMAP)"), row, 0, 1, 2)
        row += 1

        grid.addWidget(self._label("Activer :"), row, 0)
        self.imap_enabled_cb = QCheckBox("Consulter la boîte mail")
        self.imap_enabled_cb.setFont(QFont("", 12))
        self.imap_enabled_cb.setChecked(self.config["imap_enabled"])
        grid.addWidget(self.imap_enabled_cb, row, 1)
        row += 1

        grid.addWidget(self._label("Adresse affichée :"), row, 0)
        self.email_input = self._input(self.config["email_address"])
        grid.addWidget(self.email_input, row, 1)
        row += 1

        grid.addWidget(self._label("Serveur IMAP :"), row, 0)
        self.imap_server_input = self._input(self.config["imap_server"], "imap.gmail.com")
        grid.addWidget(self.imap_server_input, row, 1)
        row += 1

        grid.addWidget(self._label("Port IMAP :"), row, 0)
        self.imap_port_input = self._spinbox(self.config["imap_port"], 1, 65535)
        grid.addWidget(self.imap_port_input, row, 1)
        row += 1

        grid.addWidget(self._label("Utilisateur :"), row, 0)
        self.imap_user_input = self._input(self.config["imap_user"])
        grid.addWidget(self.imap_user_input, row, 1)
        row += 1

        grid.addWidget(self._label("Mot de passe :"), row, 0)
        self.imap_pass_input = self._password_input(self.config["imap_password"])
        grid.addWidget(self.imap_pass_input, row, 1)
        row += 1

        grid.addWidget(self._label("Dossier :"), row, 0)
        self.imap_folder_input = self._input(self.config["imap_folder"], "INBOX")
        grid.addWidget(self.imap_folder_input, row, 1)
        row += 1

        grid.addWidget(self._label("Intervalle (sec) :"), row, 0)
        self.imap_interval_input = self._spinbox(self.config["imap_interval"], 10, 300)
        grid.addWidget(self.imap_interval_input, row, 1)
        row += 1

        # ── Formats d'impression ──
        grid.addWidget(self._section_title("Formats d'impression"), row, 0, 1, 2)
        row += 1

        formats = self.config.get("formats", DEFAULT_CONFIG["formats"])
        self.format_widgets = {}

        for fmt_name, fmt_conf in formats.items():
            # Checkbox activé
            cb = QCheckBox(f"{fmt_name} cm")
            cb.setFont(QFont("", 12))
            cb.setChecked(fmt_conf.get("enabled", False))
            grid.addWidget(cb, row, 0)

            # Imprimante associée
            printer = self._input(fmt_conf.get("printer", ""), "Imprimante CUPS (vide = défaut)")
            grid.addWidget(printer, row, 1)

            self.format_widgets[fmt_name] = {"checkbox": cb, "printer": printer}
            row += 1

        # ── Tarification ──
        grid.addWidget(self._section_title("Tarification"), row, 0, 1, 2)
        row += 1

        pricing = self.config.get("pricing", DEFAULT_CONFIG["pricing"])

        grid.addWidget(self._label("Activer :"), row, 0)
        self.pricing_enabled_cb = QCheckBox("Afficher les prix")
        self.pricing_enabled_cb.setFont(QFont("", 12))
        self.pricing_enabled_cb.setChecked(pricing.get("enabled", True))
        grid.addWidget(self.pricing_enabled_cb, row, 1)
        row += 1

        self.tier_widgets = []
        tiers = pricing.get("tiers", [])
        for i, tier in enumerate(tiers):
            lbl = QLabel(f"De {tier['from']} à {tier['to']} :")
            lbl.setFont(QFont("", 12))
            lbl.setAlignment(Qt.AlignmentFlag.AlignRight | Qt.AlignmentFlag.AlignVCenter)
            grid.addWidget(lbl, row, 0)

            price_row = QHBoxLayout()
            from_sb = self._spinbox(tier["from"], 1, 999)
            to_sb = self._spinbox(tier["to"], 1, 999)
            price_input = self._input(f"{tier['price']:.2f}", "0.50")
            price_input.setMaximumWidth(80)
            price_row.addWidget(QLabel("de"))
            price_row.addWidget(from_sb)
            price_row.addWidget(QLabel("à"))
            price_row.addWidget(to_sb)
            price_row.addWidget(QLabel("="))
            price_row.addWidget(price_input)
            price_row.addWidget(QLabel("€/photo"))

            tier_container = QWidget()
            tier_container.setLayout(price_row)
            grid.addWidget(tier_container, row, 1)

            self.tier_widgets.append({"from": from_sb, "to": to_sb, "price": price_input})
            row += 1

        scroll.setWidget(content)
        layout.addWidget(scroll, 1)

        # Boutons
        buttons = QHBoxLayout()
        buttons.setSpacing(15)

        cancel_btn = QPushButton("Annuler")
        cancel_btn.setFont(QFont("", 13))
        cancel_btn.setMinimumHeight(45)
        cancel_btn.setStyleSheet("""
            QPushButton { background-color: #757575; color: white; border-radius: 8px; padding: 8px 25px; }
            QPushButton:pressed { background-color: #616161; }
        """)
        cancel_btn.clicked.connect(self.reject)
        buttons.addWidget(cancel_btn)

        save_btn = QPushButton("Enregistrer")
        save_btn.setFont(QFont("", 13, QFont.Weight.Bold))
        save_btn.setMinimumHeight(45)
        save_btn.setStyleSheet("""
            QPushButton { background-color: #4CAF50; color: white; border-radius: 8px; padding: 8px 25px; }
            QPushButton:pressed { background-color: #388E3C; }
        """)
        save_btn.clicked.connect(self._save)
        buttons.addWidget(save_btn)

        layout.addLayout(buttons)

    def _save(self):
        self.config["wifi_ap_name"] = self.wifi_name_input.text()
        self.config["wifi_ap_password"] = self.wifi_pass_input.text()
        self.config["server_ip"] = self.server_ip_input.text()
        self.config["server_port"] = self.server_port_input.value()
        self.config["upload_url"] = self.upload_url_input.text()
        self.config["email_address"] = self.email_input.text()
        self.config["imap_enabled"] = self.imap_enabled_cb.isChecked()
        self.config["imap_server"] = self.imap_server_input.text()
        self.config["imap_port"] = self.imap_port_input.value()
        self.config["imap_user"] = self.imap_user_input.text()
        self.config["imap_password"] = self.imap_pass_input.text()
        self.config["imap_folder"] = self.imap_folder_input.text()
        self.config["imap_interval"] = self.imap_interval_input.value()
        # Formats d'impression
        formats = self.config.get("formats", dict(DEFAULT_CONFIG["formats"]))
        for fmt_name, widgets in self.format_widgets.items():
            if fmt_name not in formats:
                formats[fmt_name] = {}
            formats[fmt_name]["enabled"] = widgets["checkbox"].isChecked()
            formats[fmt_name]["printer"] = widgets["printer"].text()
        self.config["formats"] = formats
        # Tarification
        tiers = []
        for tw in self.tier_widgets:
            try:
                price = float(tw["price"].text().replace(",", "."))
            except ValueError:
                price = 0.0
            tiers.append({
                "from": tw["from"].value(),
                "to": tw["to"].value(),
                "price": price,
            })
        self.config["pricing"] = {
            "enabled": self.pricing_enabled_cb.isChecked(),
            "currency": "€",
            "tiers": tiers,
        }
        save_config(self.config)
        self.accept()

    @staticmethod
    def open_config(parent=None):
        dialog = ConfigDialog(parent)
        return dialog.exec() == QDialog.DialogCode.Accepted