"""First-run membership activation dialog."""

from __future__ import annotations

from PySide6.QtCore import Qt, Signal
from PySide6.QtWidgets import (
    QCheckBox,
    QDialog,
    QHBoxLayout,
    QLabel,
    QLineEdit,
    QPushButton,
    QVBoxLayout,
)

from .widgets import (
    BUTTON_BASE_STYLE,
    COLOR_DANGER,
    COLOR_INFO,
    COLOR_MUTED,
    COLOR_SUCCESS,
    _primary_button_style,
)


class MembershipActivationDialog(QDialog):
    """Collect one membership API key and report asynchronous validation state."""

    validationRequested = Signal(str)
    memberCenterRequested = Signal()

    def __init__(self, parent=None):
        super().__init__(parent)
        self._validating = False
        self.setObjectName("membershipActivationDialog")
        self.setWindowTitle("激活蝦皮圈优化助手")
        self.setModal(True)
        self.setWindowModality(Qt.WindowModal)
        self.setMinimumWidth(520)
        self.setStyleSheet(BUTTON_BASE_STYLE)

        layout = QVBoxLayout(self)
        layout.setContentsMargins(24, 22, 24, 22)
        layout.setSpacing(12)

        heading = QLabel("首次使用需要绑定会员账号")
        heading.setObjectName("membershipActivationHeading")
        heading.setStyleSheet("font-size: 16px; font-weight: 600; color: #24292f;")
        layout.addWidget(heading)

        description = QLabel(
            "请从线上会员中心复制会员 API Key。程序会先验证账号和套餐，"
            "验证通过后再开放业务功能。"
        )
        description.setObjectName("membershipActivationDescription")
        description.setWordWrap(True)
        description.setStyleSheet(f"color: {COLOR_MUTED};")
        layout.addWidget(description)

        key_label = QLabel("会员 API Key")
        key_label.setObjectName("membershipApiKeyLabel")
        layout.addWidget(key_label)

        self.api_key_edit = QLineEdit()
        self.api_key_edit.setObjectName("membershipApiKeyEdit")
        self.api_key_edit.setEchoMode(QLineEdit.Password)
        self.api_key_edit.setPlaceholderText("粘贴会员 API Key")
        self.api_key_edit.setClearButtonEnabled(True)
        self.api_key_edit.returnPressed.connect(self._request_validation)
        key_label.setBuddy(self.api_key_edit)
        layout.addWidget(self.api_key_edit)

        self.show_key_checkbox = QCheckBox("显示 API Key")
        self.show_key_checkbox.setObjectName("showMembershipApiKeyCheckbox")
        self.show_key_checkbox.toggled.connect(self._toggle_key_visibility)
        layout.addWidget(self.show_key_checkbox)

        storage_hint = QLabel(
            "API Key 在输入框和设置页中打码显示，但会以本机明文配置保存，"
            "仅用于会员验证和默认网关请求。"
        )
        storage_hint.setObjectName("membershipApiKeyStorageHint")
        storage_hint.setWordWrap(True)
        storage_hint.setStyleSheet(f"color: {COLOR_MUTED};")
        layout.addWidget(storage_hint)

        self.status_label = QLabel("")
        self.status_label.setObjectName("membershipActivationStatusLabel")
        self.status_label.setWordWrap(True)
        self.status_label.setMinimumHeight(36)
        layout.addWidget(self.status_label)

        button_layout = QHBoxLayout()
        button_layout.setSpacing(8)
        self.member_center_button = QPushButton("前往会员中心获取 API Key")
        self.member_center_button.setObjectName("membershipCenterButton")
        self.member_center_button.clicked.connect(self.memberCenterRequested.emit)
        button_layout.addWidget(self.member_center_button)
        button_layout.addStretch(1)

        self.exit_button = QPushButton("退出程序")
        self.exit_button.setObjectName("membershipActivationExitButton")
        self.exit_button.clicked.connect(self.reject)
        button_layout.addWidget(self.exit_button)

        self.validate_button = QPushButton("验证并开始使用")
        self.validate_button.setObjectName("membershipActivationValidateButton")
        self.validate_button.setDefault(True)
        self.validate_button.setStyleSheet(
            _primary_button_style("membershipActivationValidateButton")
        )
        self.validate_button.clicked.connect(self._request_validation)
        button_layout.addWidget(self.validate_button)
        layout.addLayout(button_layout)

        self.api_key_edit.setFocus()

    def api_key(self) -> str:
        return self.api_key_edit.text().strip()

    def set_validating(self, validating: bool) -> None:
        self._validating = bool(validating)
        self.api_key_edit.setEnabled(not self._validating)
        self.show_key_checkbox.setEnabled(not self._validating)
        self.validate_button.setEnabled(not self._validating)
        self.validate_button.setText(
            "正在验证会员账号..." if self._validating else "验证并开始使用"
        )
        if self._validating:
            self.set_status("正在验证会员账号，请稍候。", level="info")

    def set_status(self, message: str, *, level: str = "muted") -> None:
        color = {
            "danger": COLOR_DANGER,
            "info": COLOR_INFO,
            "success": COLOR_SUCCESS,
        }.get(str(level), COLOR_MUTED)
        self.status_label.setStyleSheet(f"color: {color};")
        self.status_label.setText(str(message or ""))

    def focus_api_key(self) -> None:
        self.api_key_edit.setFocus()
        self.api_key_edit.selectAll()

    def accept_activation(self) -> None:
        self.set_validating(False)
        self.accept()

    def _request_validation(self) -> None:
        if self._validating:
            return
        key = self.api_key()
        if not key:
            self.set_status("请输入会员 API Key。", level="danger")
            self.focus_api_key()
            return
        self.validationRequested.emit(key)

    def _toggle_key_visibility(self, checked: bool) -> None:
        mode = QLineEdit.Normal if checked else QLineEdit.Password
        self.api_key_edit.setEchoMode(mode)