#!/bin/bash
set -euo pipefail

REPO="git@gitea.hptrow.me:pt/nvchad.git"
BRANCH="customize"
NVIM_CONFIG="$HOME/.config/nvim"
SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
source "$SCRIPT_DIR/_lib.sh"

echo "============================================"
echo "NvChad Configuration Installation Script"
echo "============================================"
echo ""

# Check prerequisites
if ! command -v nvim &> /dev/null; then
    echo "Error: Neovim is not installed or not in PATH" >&2
    echo "Please run ./install_neovim.sh first" >&2
    exit 1
fi

if ! command -v git &> /dev/null; then
    echo "Error: Git is not installed" >&2
    exit 1
fi

# Verify Neovim version
NVIM_VERSION=$(nvim --version | head -n1 | grep -oP 'v\K[0-9]+\.[0-9]+' || echo "0.0")
REQUIRED_VERSION="0.9"
if [ "$(printf '%s\n' "$REQUIRED_VERSION" "$NVIM_VERSION" | sort -V | head -n1)" != "$REQUIRED_VERSION" ]; then
    echo "Error: Neovim version $NVIM_VERSION is too old (need 0.9.5+)" >&2
    exit 1
fi

echo "Neovim version: $(nvim --version | head -n1)"
echo ""

# If already installed and pointing at the right remote, just pull
if [ -d "$NVIM_CONFIG/.git" ]; then
    REMOTE_NAME=""
    if git -C "$NVIM_CONFIG" remote get-url hptrow &>/dev/null; then
        REMOTE_NAME="hptrow"
    elif git -C "$NVIM_CONFIG" remote get-url origin &>/dev/null; then
        REMOTE_NAME="origin"
    fi
    EXISTING_REMOTE=$(git -C "$NVIM_CONFIG" remote get-url "$REMOTE_NAME" 2>/dev/null || echo "")
    if [ "$EXISTING_REMOTE" = "$REPO" ]; then
        echo "NvChad config already installed — pulling latest..."
        stashed=false
        if ! git -C "$NVIM_CONFIG" diff --quiet || ! git -C "$NVIM_CONFIG" diff --cached --quiet; then
            git -C "$NVIM_CONFIG" stash
            stashed=true
        fi
        git -C "$NVIM_CONFIG" pull "$REMOTE_NAME" "$BRANCH"
        $stashed && git -C "$NVIM_CONFIG" stash pop || true
        deploy_nvim
        echo "Done."
        exit 0
    fi
fi

echo "This script will:"
echo "  - Backup existing ~/.config/nvim to ~/.config/nvim.backup (if exists)"
echo "  - Clone your NvChad config from $REPO ($BRANCH branch)"
echo "  - Deploy lua modules from dotfiles/nvim/"
echo "  - Launch nvim to auto-install lazy.nvim and all plugins"
echo ""
echo "Prerequisites:"
echo "  - SSH key must be set up for gitea.hptrow.me"
echo ""
read -p "Continue with installation? (y/N) " -n 1 -r
echo
if [[ ! $REPLY =~ ^[Yy]$ ]]; then
    echo "Installation cancelled."
    exit 0
fi

echo ""
echo "Starting installation..."
echo ""

# Backup existing config
if [ -d "$NVIM_CONFIG" ]; then
    echo "Backing up existing ~/.config/nvim to ~/.config/nvim.backup"
    [ -d "$NVIM_CONFIG.backup" ] && rm -rf "$NVIM_CONFIG.backup"
    mv "$NVIM_CONFIG" "$NVIM_CONFIG.backup"
fi

# Clone the config
echo "Cloning NvChad config from gitea ($BRANCH branch)..."
set -x
git clone -b "$BRANCH" "$REPO" "$NVIM_CONFIG"
set +x

[ -d "$NVIM_CONFIG" ] || { echo "Error: Failed to clone config" >&2; exit 1; }

echo ""
echo "Config cloned successfully!"
echo ""

deploy_nvim

echo ""
echo "============================================"
echo "First Launch Setup"
echo "============================================"
echo ""
echo "Neovim will now launch and automatically:"
echo "  1. Bootstrap lazy.nvim plugin manager"
echo "  2. Install NvChad (as a plugin)"
echo "  3. Install all configured plugins"
echo ""
echo "This may take a few minutes on first run."
echo "After installation completes, close nvim with :q"
echo ""
read -p "Press Enter to launch nvim and complete setup..." -r
echo ""

nvim +q

echo ""
echo "============================================"
echo "Installation Complete!"
echo "============================================"
echo ""
echo "Your NvChad configuration is installed at: $NVIM_CONFIG"
echo ""
echo "Key customizations in this config:"
echo "  - Theme: vscode_dark"
echo "  - Tab width: 4 spaces"
echo "  - Obsidian.nvim integration"
echo "  - SQL development tools (pg_format, sqlfluff)"
echo "  - Mason for installing formatters"
echo "  - Custom keybindings: g+w (format), <leader>gb (blame), more in lua/mappings.lua"
echo ""
echo "Next time you launch nvim, everything will be ready!"
echo ""
[ -d "$NVIM_CONFIG.backup" ] && echo "Note: Your old config was backed up to $NVIM_CONFIG.backup"
echo "============================================"