"""Welcome page - CmdForge landing page."""

from PySide6.QtWidgets import (
    QWidget, QVBoxLayout, QHBoxLayout, QLabel, QPushButton,
    QFrame, QGridLayout, QSizePolicy
)
from PySide6.QtCore import Qt


class WelcomePage(QWidget):
    """CmdForge welcome/landing page."""

    def __init__(self, main_window):
        super().__init__()
        self.main_window = main_window
        self._setup_ui()

    def _setup_ui(self):
        """Set up the UI."""
        layout = QVBoxLayout(self)
        layout.setContentsMargins(48, 48, 48, 48)
        layout.setSpacing(32)

        # Top spacer
        layout.addStretch(1)

        # Logo/title
        title = QLabel("CmdForge")
        title.setStyleSheet("""
            font-size: 48px;
            font-weight: bold;
            color: #667eea;
        """)
        title.setAlignment(Qt.AlignCenter)
        layout.addWidget(title)

        # Tagline
        tagline = QLabel("Build AI-powered command-line tools")
        tagline.setStyleSheet("""
            font-size: 18px;
            color: #718096;
        """)
        tagline.setAlignment(Qt.AlignCenter)
        layout.addWidget(tagline)

        layout.addSpacing(24)

        # Quick actions
        actions_container = QWidget()
        actions_container.setMaximumWidth(600)
        actions_layout = QGridLayout(actions_container)
        actions_layout.setSpacing(16)

        # Create tool card
        create_card = self._create_action_card(
            "Create Tool",
            "Build a new AI-powered command-line tool with prompts, code, and data flow",
            "New Tool",
            self._on_create_tool
        )
        actions_layout.addWidget(create_card, 0, 0)

        # Browse registry card
        registry_card = self._create_action_card(
            "Browse Registry",
            "Discover and install tools shared by the community",
            "Open Registry",
            self._on_browse_registry
        )
        actions_layout.addWidget(registry_card, 0, 1)

        # Manage tools card
        tools_card = self._create_action_card(
            "My Tools",
            "View, edit, and run your existing tools",
            "Open Tools",
            self._on_open_tools
        )
        actions_layout.addWidget(tools_card, 1, 0)

        # Providers card
        providers_card = self._create_action_card(
            "AI Providers",
            "Configure AI backends like Claude, GPT, and custom providers",
            "Configure",
            self._on_open_providers
        )
        actions_layout.addWidget(providers_card, 1, 1)

        # Center the actions container
        actions_wrapper = QHBoxLayout()
        actions_wrapper.addStretch()
        actions_wrapper.addWidget(actions_container)
        actions_wrapper.addStretch()
        layout.addLayout(actions_wrapper)

        # Bottom spacer
        layout.addStretch(2)

        # Footer
        footer = QLabel("CmdForge - AI Tool Builder")
        footer.setStyleSheet("color: #a0aec0; font-size: 12px;")
        footer.setAlignment(Qt.AlignCenter)
        layout.addWidget(footer)

    def _create_action_card(self, title: str, description: str, button_text: str, callback) -> QFrame:
        """Create an action card widget."""
        card = QFrame()
        card.setStyleSheet("""
            QFrame {
                background-color: white;
                border: 1px solid #e2e8f0;
                border-radius: 8px;
                padding: 16px;
            }
            QFrame:hover {
                border-color: #667eea;
            }
        """)
        card.setMinimumSize(260, 140)

        layout = QVBoxLayout(card)
        layout.setContentsMargins(16, 16, 16, 16)
        layout.setSpacing(8)

        # Title
        title_label = QLabel(title)
        title_label.setStyleSheet("font-size: 16px; font-weight: 600; color: #2d3748; border: none;")
        layout.addWidget(title_label)

        # Description
        desc_label = QLabel(description)
        desc_label.setWordWrap(True)
        desc_label.setStyleSheet("font-size: 13px; color: #718096; border: none;")
        layout.addWidget(desc_label, 1)

        # Button
        btn = QPushButton(button_text)
        btn.clicked.connect(callback)
        btn.setStyleSheet("""
            QPushButton {
                background-color: #667eea;
                color: white;
                border: none;
                border-radius: 4px;
                padding: 8px 16px;
                font-weight: 500;
            }
            QPushButton:hover {
                background-color: #5a67d8;
            }
        """)
        layout.addWidget(btn)

        return card

    def _on_create_tool(self):
        """Handle create tool action."""
        self.main_window.open_tool_builder()

    def _on_browse_registry(self):
        """Handle browse registry action."""
        self.main_window.navigate_to("registry")

    def _on_open_tools(self):
        """Handle open tools action."""
        self.main_window.navigate_to("tools")

    def _on_open_providers(self):
        """Handle open providers action."""
        self.main_window.navigate_to("providers")

    def refresh(self):
        """Refresh the page (nothing to refresh)."""
        pass