#!/usr/bin/env sh
set -eu

if (set -o pipefail) >/dev/null 2>&1; then
    set -o pipefail
fi

export MSYS_NO_PATHCONV=1

SCRIPT_PATH="$0"
case "$SCRIPT_PATH" in
    /*) ;;
    *) SCRIPT_PATH="$(pwd)/$SCRIPT_PATH" ;;
esac
SCRIPT_DIR="$(CDPATH= cd -- "$(dirname -- "$SCRIPT_PATH")" && pwd)"
cd "$SCRIPT_DIR"
ROOT_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
ROOT_ENV_FILE="$ROOT_DIR/.env"
MODE="${1:-start}"

RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m'

info()  { printf '%b\n' "${GREEN}[INFO]${NC} $*"; }
warn()  { printf '%b\n' "${YELLOW}[WARN]${NC} $*"; }
error() { printf '%b\n' "${RED}[ERROR]${NC} $*"; exit 1; }

if [ -f "$ROOT_ENV_FILE" ]; then
    ENV_OVERRIDE_WEB_HOST_SET=false
    ENV_OVERRIDE_SERVER_HOST_SET=false
    ENV_OVERRIDE_POSTGRES_HOST_SET=false

    if [ "${WEB_HOST+x}" = x ]; then
        ENV_OVERRIDE_WEB_HOST_SET=true
        ENV_OVERRIDE_WEB_HOST="$WEB_HOST"
    fi

    if [ "${SERVER_HOST+x}" = x ]; then
        ENV_OVERRIDE_SERVER_HOST_SET=true
        ENV_OVERRIDE_SERVER_HOST="$SERVER_HOST"
    fi

    if [ "${POSTGRES_HOST+x}" = x ]; then
        ENV_OVERRIDE_POSTGRES_HOST_SET=true
        ENV_OVERRIDE_POSTGRES_HOST="$POSTGRES_HOST"
    fi

    set -a
    . "$ROOT_ENV_FILE"
    set +a

    if [ "$ENV_OVERRIDE_WEB_HOST_SET" = true ]; then
        WEB_HOST="$ENV_OVERRIDE_WEB_HOST"
    fi

    if [ "$ENV_OVERRIDE_SERVER_HOST_SET" = true ]; then
        SERVER_HOST="$ENV_OVERRIDE_SERVER_HOST"
    fi

    if [ "$ENV_OVERRIDE_POSTGRES_HOST_SET" = true ]; then
        POSTGRES_HOST="$ENV_OVERRIDE_POSTGRES_HOST"
    fi
fi

if [ "${X_FINANCIAL_FORCE_SETUP:-false}" = "true" ]; then
    SETUP_COMPLETED=false
    VITE_SETUP_COMPLETED=false
fi

WEB_HOST="${WEB_HOST:-0.0.0.0}"
WEB_PORT="${WEB_PORT:-5273}"

export VITE_SETUP_COMPLETED="${SETUP_COMPLETED:-false}"
export VITE_COMPANY_NAME="${COMPANY_NAME:-}"
export VITE_COMPANY_CODE="${COMPANY_CODE:-}"
export VITE_ADMIN_EMAIL="${ADMIN_EMAIL:-}"
export VITE_WEB_HOST="${WEB_HOST}"
export VITE_WEB_PORT="${WEB_PORT}"
export VITE_SERVER_HOST="${SERVER_HOST:-127.0.0.1}"
export VITE_SERVER_PORT="${SERVER_PORT:-8000}"
export VITE_POSTGRES_HOST="${POSTGRES_HOST:-127.0.0.1}"
export VITE_POSTGRES_PORT="${POSTGRES_PORT:-5432}"
export VITE_POSTGRES_DB="${POSTGRES_DB:-x_financial}"
export VITE_POSTGRES_USER="${POSTGRES_USER:-postgres}"
export VITE_REDIS_URL="${REDIS_URL:-}"

is_wsl() {
    grep -qi microsoft /proc/version 2>/dev/null
}

is_windows_path() {
    case "$SCRIPT_DIR" in
        /mnt/*) return 0 ;;
        /d/*|/c/*|/e/*|/f/*) return 0 ;;
        *) return 1 ;;
    esac
}

use_windows_npm() {
    is_wsl && is_windows_path && command -v powershell.exe >/dev/null 2>&1 && command -v wslpath >/dev/null 2>&1
}

windows_project_path() {
    wslpath -w "$SCRIPT_DIR"
}

shell_quote_single() {
    printf "%s" "$1" | sed "s/'/''/g"
}

run_windows_powershell() {
    powershell_command="$1"
    powershell.exe -NoProfile -ExecutionPolicy Bypass -Command "$powershell_command"
}

run_windows_npm_install() {
    win_path="$(windows_project_path)"
    win_path_ps="$(shell_quote_single "$win_path")"
    run_windows_powershell "Set-Location -LiteralPath '$win_path_ps'; npm install"
}

run_windows_npm_start() {
    win_path="$(windows_project_path)"
    win_path_ps="$(shell_quote_single "$win_path")"
    exec powershell.exe -NoProfile -ExecutionPolicy Bypass -Command "Set-Location -LiteralPath '$win_path_ps'; npm start -- --host $WEB_HOST --port $WEB_PORT"
}

dependencies_ready() {
    [ -d "node_modules" ] || return 1
    [ -f "node_modules/vite/bin/vite.js" ] || return 1
    [ -f "node_modules/pg/package.json" ] || return 1
    [ -f "node_modules/vue-router/package.json" ] || return 1

    if use_windows_npm; then
        win_path="$(windows_project_path)"
        win_path_ps="$(shell_quote_single "$win_path")"
        powershell.exe -NoProfile -ExecutionPolicy Bypass -Command "Set-Location -LiteralPath '$win_path_ps'; node -e \"require('rollup'); require('pg'); require('vue-router')\"" >/dev/null 2>&1
        return $?
    fi

    [ -e "node_modules/.bin/vite" ] || [ -e "node_modules/.bin/vite.cmd" ] || return 1
    node -e "require('rollup'); require('pg'); require('vue-router')" >/dev/null 2>&1
}

ensure_runtime_tools() {
    if use_windows_npm; then
        info "Detected WSL on a Windows-mounted project"
        info "Using Windows npm to manage web dependencies"

        if ! run_windows_powershell "node -v > \$null; npm -v > \$null" >/dev/null 2>&1; then
            error "Windows Node.js/npm is not available in PATH. Install Node.js on Windows first."
        fi

        return 0
    fi

    if ! command -v node >/dev/null 2>&1; then
        error "Node.js is not installed. Install it first: https://nodejs.org"
    fi

    if ! command -v npm >/dev/null 2>&1; then
        error "npm is not installed. It should come with Node.js."
    fi

    info "Node.js $(node -v) | npm $(npm -v)"
}

ensure_dependencies() {
    ensure_runtime_tools

    if dependencies_ready; then
        info "Web dependencies are ready."
        return 0
    fi

    warn "Web dependencies are missing or incomplete"
    info "Installing web dependencies..."

    if use_windows_npm; then
        run_windows_npm_install
    else
        npm install
    fi

    if ! dependencies_ready; then
        error "Web dependencies are still incomplete after installation. Try deleting web/node_modules and running npm install manually."
    fi

    info "Web dependencies are ready."
}

start_dev_server() {
    info "Starting X-Financial Reimbursement Admin..."
    info "Access: http://$WEB_HOST:$WEB_PORT"
    echo ""

    if use_windows_npm; then
        run_windows_npm_start
    fi

    exec npm start -- --host "$WEB_HOST" --port "$WEB_PORT"
}

case "$MODE" in
    deps)
        ensure_dependencies
        ;;
    start)
        ensure_dependencies
        start_dev_server
        ;;
    *)
        error "Unknown mode: $MODE. Use one of: deps, start"
        ;;
esac