#!/bin/bash

# Fission Configuration Analyzer
# Analyzes and displays fission configuration from .fission directory

set -euo pipefail

usage() {
    echo "Usage: $0 <project-path>"
    echo "  project-path: Path to the fission project directory (should contain .fission/ subdirectory)"
    exit 1
}

if [[ $# -ne 1 ]]; then
    usage
fi

PROJECT_PATH="$1"

# Validate project path
if [[ ! -d "$PROJECT_PATH" ]]; then
    echo "Error: Project path '$PROJECT_PATH' does not exist"
    exit 1
fi

FISSION_DIR="$PROJECT_PATH/.fission"

if [[ ! -d "$FISSION_DIR" ]]; then
    echo "Error: .fission directory not found in '$PROJECT_PATH'"
    exit 1
fi

echo "🔍 Analyzing Fission configuration in '$PROJECT_PATH'"
echo "=================================================="

# Analyze deployment.json (main configuration)
if [[ -f "$FISSION_DIR/deployment.json" ]]; then
    echo ""
    echo "📋 DEPLOYMENT CONFIGURATION"
    echo "--------------------------"

    # Extract namespaces
    namespace=$(jq -r '.namespace // "default"' "$FISSION_DIR/deployment.json")
    echo "Namespace: $namespace"

    # Analyze environments
    echo ""
    echo "🌐 ENVIRONMENTS:"
    if jq -e '.environments' "$FISSION_DIR/deployment.json" >/dev/null; then
        jq -r '.environments | to_entries[] | "  \(.key):" +
               "\n    Image: \(.value.image // "N/A")" +
               "\n    Builder: \(.value.builder // "N/A")" +
               "\n    CPU: \(.value.mincpu // 0)m-\(.value.maxcpu // 0)m" +
               "\n    Memory: \(.value.minmemory // 0)Mi-\(.value.maxmemory // 0)Mi" +
               "\n    Pool Size: \(.value.poolsize // 1)"' "$FISSION_DIR/deployment.json"
    else
        echo "  No environments defined"
    fi

    # Analyze packages
    echo ""
    echo "📦 PACKAGES:"
    if jq -e '.packages' "$FISSION_DIR/deployment.json" >/dev/null; then
        jq -r '.packages | to_entries[] | "  \(.key):" +
               "\n    Build Command: \(.value.buildcmd // "N/A")" +
               "\n    Source Archive: \(.value.sourcearchive // "N/A")" +
               "\n    Environment: \(.value.env // "N/A")"' "$FISSION_DIR/deployment.json"
    else
        echo "  No packages defined"
    fi

    # Analyze functions (from function_common and individual functions)
    echo ""
    echo "⚙️  FUNCTIONS:"
    if jq -e '.function_common' "$FISSION_DIR/deployment.json" >/dev/null; then
        echo "  Common Configuration:"
        jq -r '.function_common |
               "    Package: \(.pkg // "N/A")" +
               "\n    Executor Type: \(.executor.select // "N/A")" +
               "\n    CPU: \(.mincpu // 0)m-\(.maxcpu // 0)m" +
               "\n    Memory: \(.minmemory // 0)Mi-\(.maxmemory // 0)Mi"' "$FISSION_DIR/deployment.json"
    fi

    # Look for individual function definitions
    if jq -e '.functions' "$FISSION_DIR/deployment.json" >/dev/null; then
        echo ""
        echo "  Individual Functions:"
        jq -r '.functions | to_entries[] | "  \(.key):" +
               "\n    Executor: \(.value.executor // "N/A")"' "$FISSION_DIR/deployment.json"
    else
        echo "  No individual functions defined (using function_common)"
    fi

    # Analyze secrets
    echo ""
    echo "🔐 SECRETS:"
    if jq -e '.secrets' "$FISSION_DIR/deployment.json" >/dev/null; then
        jq -r '.secrets | to_entries[] | "  \(.key):" +
               "\n    Type: \(.value.kind // "literal")" +
               "\n    Literal Count: \(.value.literals | length // 0)"' "$FISSION_DIR/deployment.json"
    else
        echo "  No secrets defined"
    fi

    # Analyze configmaps
    echo ""
    echo "⚙️  CONFIGMAPS:"
    if jq -e '.configmaps' "$FISSION_DIR/deployment.json" >/dev/null; then
        jq -r '.configmaps | to_entries[] | "  \(.key):" +
               "\n    Literal Count: \(.value.literals | length // 0)"' "$FISSION_DIR/deployment.json"
    else
        echo "  No configmaps defined"
    fi

    # Analyze archives
    echo ""
    echo "📦 ARCHIVES:"
    if jq -e '.archives' "$FISSION_DIR/deployment.json" >/dev/null; then
        jq -r '.archives | to_entries[] | "  \(.key):" +
               "\n    Source Path: \(.value.sourcepath // "N/A")"' "$FISSION_DIR/deployment.json"
    else
        echo "  No archives defined"
    fi
else
    echo ""
    echo "⚠️  deployment.json not found in .fission directory"
fi

# Check for other fission files
echo ""
echo "📄 OTHER FISSION FILES:"
shopt -s nullglob
fission_files=("$FISSION_DIR"/*.json)
if [[ ${#fission_files[@]} -gt 0 ]]; then
    for file in "${fission_files[@]}"; do
        filename=$(basename "$file")
        if [[ "$filename" != "deployment.json" ]]; then
            echo "  $filename"
            # Show brief content
            if [[ -s "$file" ]]; then
                line_count=$(wc -l < "$file")
                echo "    ($line_count lines)"
            fi
        fi
    done
else
    echo "  No other .json files found"
fi

echo ""
echo "✅ Analysis complete"