"""APIClient - Agent — Import Dialog."""
from PyQt6.QtWidgets import (
    QDialog, QVBoxLayout, QHBoxLayout, QTabWidget, QWidget,
    QTextEdit, QPushButton, QLabel, QFileDialog, QMessageBox
)
from PyQt6.QtGui import QFont

from app.ui.theme import Colors
from app.core import importer, storage
from app.models import HttpRequest


class ImportDialog(QDialog):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.setWindowTitle("Import")
        self.setMinimumSize(640, 460)
        self.imported_req: HttpRequest | None = None

        layout = QVBoxLayout(self)
        layout.setContentsMargins(0, 0, 0, 0)
        layout.setSpacing(0)

        # Header
        header = QWidget()
        header.setObjectName("panelHeader")
        header.setFixedHeight(48)
        hl = QHBoxLayout(header)
        hl.setContentsMargins(16, 0, 16, 0)
        title = QLabel("Import")
        title.setObjectName("panelTitle")
        hl.addWidget(title)
        layout.addWidget(header)

        self.tabs = QTabWidget()
        self.tabs.addTab(self._make_postman_tab(), "Postman Collection")
        self.tabs.addTab(self._make_curl_tab(),    "cURL Command")
        layout.addWidget(self.tabs, 1)

    # ── Tab builders ──────────────────────────────────────────────────────────

    def _make_postman_tab(self):
        w = QWidget()
        layout = QVBoxLayout(w)
        layout.setContentsMargins(16, 12, 16, 12)
        layout.setSpacing(8)

        hint = QLabel("Paste a Postman Collection v2.1 JSON or load from file:")
        hint.setObjectName("hintText")
        layout.addWidget(hint)

        self.postman_editor = QTextEdit()
        self.postman_editor.setFont(
            QFont("JetBrains Mono, Fira Code, Consolas, monospace", 10)
        )
        self.postman_editor.setPlaceholderText(
            '{\n  "info": {"name": "My Collection"},\n  "item": [...]\n}'
        )
        layout.addWidget(self.postman_editor)

        btn_row = QHBoxLayout()
        load_btn = QPushButton("Load File…")
        load_btn.clicked.connect(self._load_postman_file)
        import_btn = QPushButton("Import Collection")
        import_btn.setObjectName("accent")
        import_btn.clicked.connect(self._import_postman)
        btn_row.addWidget(load_btn)
        btn_row.addStretch()
        btn_row.addWidget(import_btn)
        layout.addLayout(btn_row)
        return w

    def _make_curl_tab(self):
        w = QWidget()
        layout = QVBoxLayout(w)
        layout.setContentsMargins(16, 12, 16, 12)
        layout.setSpacing(8)

        hint = QLabel("Paste a cURL command — it will open as a new request tab:")
        hint.setObjectName("hintText")
        layout.addWidget(hint)

        self.curl_editor = QTextEdit()
        self.curl_editor.setFont(
            QFont("JetBrains Mono, Fira Code, Consolas, monospace", 10)
        )
        self.curl_editor.setPlaceholderText(
            "curl -X POST https://api.example.com/data \\\n"
            "  -H 'Content-Type: application/json' \\\n"
            "  -d '{\"key\": \"value\"}'"
        )
        layout.addWidget(self.curl_editor)

        btn_row = QHBoxLayout()
        import_btn = QPushButton("Import as Request")
        import_btn.setObjectName("accent")
        import_btn.clicked.connect(self._import_curl)
        btn_row.addStretch()
        btn_row.addWidget(import_btn)
        layout.addLayout(btn_row)
        return w

    # ── Import actions ────────────────────────────────────────────────────────

    def _load_postman_file(self):
        path, _ = QFileDialog.getOpenFileName(
            self, "Open Collection", "", "JSON Files (*.json);;All Files (*)"
        )
        if path:
            with open(path, "r", encoding="utf-8") as f:
                self.postman_editor.setPlainText(f.read())

    def _import_postman(self):
        text = self.postman_editor.toPlainText().strip()
        if not text:
            return
        try:
            col_name, requests = importer.from_postman_collection(text)
            col_id = storage.add_collection(col_name)
            for req in requests:
                storage.save_request(col_id, req)
            QMessageBox.information(
                self, "Import Successful",
                f"Imported collection '{col_name}' with {len(requests)} request(s)."
            )
            self.accept()
        except Exception as e:
            QMessageBox.critical(self, "Import Error", str(e))

    def _import_curl(self):
        text = self.curl_editor.toPlainText().strip()
        if not text:
            return
        try:
            self.imported_req = importer.from_curl(text)
            self.accept()
        except Exception as e:
            QMessageBox.critical(self, "Import Error", str(e))