package com.nodka.zysjtest;

import android.content.Context;
import android.os.Handler;
import android.os.Looper;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.view.Gravity;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AlertDialog;
import androidx.recyclerview.widget.RecyclerView;

import com.google.android.material.button.MaterialButton;
import com.google.android.material.materialswitch.MaterialSwitch;

import java.util.List;

class TestItemAdapter extends RecyclerView.Adapter<TestItemAdapter.TestItemViewHolder> {
    private final List<TestItem> items;
    private final Handler handler = new Handler(Looper.getMainLooper());

    TestItemAdapter(List<TestItem> items) {
        this.items = items;
    }

    @NonNull
    @Override
    public TestItemViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.item_test_item, parent, false);
        return new TestItemViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull TestItemViewHolder holder, int position) {
        TestItem item = items.get(position);
        holder.chineseNameTextView.setText(item.chineseName);
        holder.methodNameTextView.setText(item.methodName);
        holder.descriptionTextView.setText(item.description);
        holder.resultTextView.setText(item.result);
        bindSwitch(holder, item);
        bindInputs(holder, item);

        holder.testButton.setOnClickListener(v -> {
            int adapterPosition = holder.getAdapterPosition();
            if (adapterPosition == RecyclerView.NO_POSITION) {
                return;
            }
            if (item.requiresConfirmation) {
                showConfirmation(v.getContext(), item, () -> runTest(adapterPosition, holder));
                return;
            }
            runTest(adapterPosition, holder);
        });
    }

    @Override
    public int getItemCount() {
        return items.size();
    }

    private void bindInputs(TestItemViewHolder holder, TestItem item) {
        holder.inputContainer.removeAllViews();
        holder.inputEditText.setText(null);

        if (!item.hasInput) {
            holder.inputEditText.setVisibility(View.GONE);
            holder.inputContainer.setVisibility(View.GONE);
            return;
        }

        holder.inputEditText.setVisibility(View.VISIBLE);
        holder.inputContainer.setVisibility(item.inputFields.length > 1 ? View.VISIBLE : View.GONE);
        bindInputField(holder.inputEditText, item.inputFields[0]);

        if (item.inputFields.length > 1) {
            Context context = holder.itemView.getContext();
            for (int i = 1; i < item.inputFields.length; i++) {
                EditText extraInput = createInputEditText(context, item.inputFields[i], true);
                holder.inputContainer.addView(extraInput);
            }
        }
    }

    private void bindSwitch(TestItemViewHolder holder, TestItem item) {
        if (!item.hasSwitch) {
            holder.switchView.setVisibility(View.GONE);
            holder.switchView.setOnCheckedChangeListener(null);
            return;
        }

        holder.switchView.setVisibility(View.VISIBLE);
        holder.switchView.setText(item.switchLabel);
        holder.switchView.setOnCheckedChangeListener(null);
        holder.switchView.setChecked(item.switchChecked);
        holder.switchView.setOnCheckedChangeListener((buttonView, isChecked) -> item.switchChecked = isChecked);
    }

    private void bindInputField(EditText editText, TestItem.InputField inputField) {
        editText.setHint(inputField.hint);
        editText.setInputType(inputField.inputType);
        editText.setText(inputField.value);
    }

    private EditText createInputEditText(Context context, TestItem.InputField inputField, boolean addTopMargin) {
        EditText editText = new EditText(context);
        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                LayoutParams.MATCH_PARENT,
                dpToPx(context, 40));
        if (addTopMargin) {
            params.topMargin = dpToPx(context, 8);
        }
        editText.setLayoutParams(params);
        editText.setBackgroundResource(R.drawable.bg_result_panel);
        editText.setGravity(Gravity.CENTER_VERTICAL | Gravity.START);
        editText.setHint(inputField.hint);
        editText.setInputType(inputField.inputType);
        editText.setMaxLines(1);
        editText.setSingleLine(true);
        editText.setPadding(dpToPx(context, 8), dpToPx(context, 6), dpToPx(context, 8), dpToPx(context, 6));
        editText.setText(inputField.value);
        editText.setTextColor(context.getResources().getColor(R.color.text_primary, context.getTheme()));
        editText.setHintTextColor(context.getResources().getColor(R.color.text_secondary, context.getTheme()));
        editText.setTextSize(13f);
        return editText;
    }

    private void showConfirmation(Context context, TestItem item, Runnable onConfirmed) {
        new AlertDialog.Builder(context)
                .setMessage(item.confirmationMessage)
                .setNegativeButton(android.R.string.cancel, null)
                .setPositiveButton(android.R.string.ok, (dialog, which) -> onConfirmed.run())
                .show();
    }

    private void runTest(int position, TestItemViewHolder holder) {
        if (position == RecyclerView.NO_POSITION) {
            return;
        }

        TestItem item = items.get(position);
        String[] inputs = collectInputs(item, holder);

        item.result = "开始测试...";
        notifyItemChanged(position);

        if (item.testAction == null) {
            handler.postDelayed(() -> {
                item.result = "测试通过：当前接口待接入真实 API";
                notifyItemChanged(position);
            }, 500);
            return;
        }

        try {
            item.result = item.testAction.run(item, inputs);
        } catch (Exception e) {
            String message = e.getMessage();
            if (message == null || message.isEmpty()) {
                message = e.getClass().getSimpleName();
            } else {
                message = e.getClass().getSimpleName() + ": " + message;
            }
            item.result = "调用失败：" + message;
        }
        notifyItemChanged(position);
    }

    private String[] collectInputs(TestItem item, TestItemViewHolder holder) {
        if (!item.hasInput) {
            return new String[0];
        }

        String[] inputs = new String[item.inputFields.length];
        inputs[0] = readFieldValue(holder.inputEditText, item.inputFields[0]);
        item.setInputValue(0, inputs[0]);

        for (int i = 1; i < item.inputFields.length; i++) {
            EditText extraInput = (EditText) holder.inputContainer.getChildAt(i - 1);
            inputs[i] = readFieldValue(extraInput, item.inputFields[i]);
            item.setInputValue(i, inputs[i]);
        }

        return inputs;
    }

    private String readFieldValue(EditText editText, TestItem.InputField inputField) {
        String value = editText.getText().toString().trim();
        if (value.isEmpty()) {
            value = inputField.defaultValue;
            editText.setText(value);
        }
        return value;
    }

    private int dpToPx(Context context, int dp) {
        float density = context.getResources().getDisplayMetrics().density;
        return Math.round(dp * density);
    }

    static class TestItemViewHolder extends RecyclerView.ViewHolder {
        private final TextView chineseNameTextView;
        private final TextView methodNameTextView;
        private final TextView descriptionTextView;
        private final MaterialSwitch switchView;
        private final EditText inputEditText;
        private final LinearLayout inputContainer;
        private final TextView resultTextView;
        private final MaterialButton testButton;

        TestItemViewHolder(@NonNull View itemView) {
            super(itemView);
            chineseNameTextView = itemView.findViewById(R.id.test_item_chinese_name_text);
            methodNameTextView = itemView.findViewById(R.id.test_item_method_name_text);
            descriptionTextView = itemView.findViewById(R.id.test_item_description_text);
            switchView = itemView.findViewById(R.id.test_item_switch);
            inputEditText = itemView.findViewById(R.id.test_item_input_edit);
            inputContainer = itemView.findViewById(R.id.test_item_input_container);
            resultTextView = itemView.findViewById(R.id.test_item_result_text);
            testButton = itemView.findViewById(R.id.test_item_button);
        }
    }
}