#!/usr/bin/env nu

# Audit Crate Dependencies Script
# Scans all plugins and analyzes their nu-* crate dependencies
#
# Usage:
#   audit_crate_dependencies.nu                # Audit all plugins
#   audit_crate_dependencies.nu --plugin NAME  # Audit specific plugin
#   audit_crate_dependencies.nu --export       # Export dependency matrix

use lib/common_lib.nu *

# Main entry point
def main [
    --plugin: string              # Specific plugin to audit
    --export                      # Export dependency matrix to JSON
    --system-only                 # Only audit system plugins
    --custom-only                 # Only audit custom plugins
] {
    log_info "Nushell Plugin Dependency Audit"

    # Check nushell source exists
    let nushell_dir = "./nushell"
    if not ($nushell_dir | path exists) {
        log_error "Nushell source not found at [$nushell_dir]"
        log_info "Run: download_nushell.nu <version>"
        exit 1
    }

    # Get nushell version
    let nushell_version = get_nushell_version $nushell_dir

    # Audit plugins
    if ($plugin | is-not-empty) {
        audit_single_plugin $plugin $nushell_version
    } else {
        let include_system = not $custom_only
        let include_custom = not $system_only

        let results = audit_all_plugins $nushell_version $include_system $include_custom

        # Display results
        display_audit_results $results

        # Export if requested
        if $export {
            export_dependency_matrix $results $nushell_version
        }
    }
}

# Get nushell version from Cargo.toml
def get_nushell_version [
    nushell_dir: string
]: nothing -> string {
    let cargo_toml = $"($nushell_dir)/Cargo.toml"
    open $cargo_toml | get package.version
}

# Audit all plugins (system + custom)
def audit_all_plugins [
    nushell_version: string
    include_system: bool
    include_custom: bool
]: nothing -> table {
    mut all_results = []

    # Audit system plugins
    if $include_system {
        log_info "Auditing system plugins..."
        let system_results = audit_system_plugins $nushell_version
        $all_results = ($all_results | append $system_results)
    }

    # Audit custom plugins
    if $include_custom {
        log_info "Auditing custom plugins..."
        let custom_results = audit_custom_plugins $nushell_version
        $all_results = ($all_results | append $custom_results)
    }

    $all_results
}

# Audit nushell workspace plugins
def audit_system_plugins [
    nushell_version: string
]: nothing -> table {
    let nushell_dir = "./nushell"
    let cargo_toml = $"($nushell_dir)/Cargo.toml"

    # Get workspace members
    let workspace_members = try {
        open $cargo_toml | get workspace.members
    } catch {
        log_error "Could not read workspace members"
        return []
    }

    # Filter to plugin members only
    let plugin_members = $workspace_members | where {|it| $it | str starts-with "crates/nu_plugin_"}

    log_info $"Found ($plugin_members | length) system plugins"

    # Audit each system plugin
    $plugin_members | each {|member|
        let plugin_name = $member | str replace "crates/" ""
        let plugin_cargo_toml = $"($nushell_dir)/($member)/Cargo.toml"

        audit_plugin_cargo_toml $plugin_name $plugin_cargo_toml $nushell_version "system"
    }
}

# Audit custom plugins (nu_plugin_* in root)
def audit_custom_plugins [
    nushell_version: string
]: nothing -> table {
    let plugin_dirs = get_plugin_directories

    log_info $"Found ($plugin_dirs | length) custom plugins"

    $plugin_dirs | each {|plugin_dir|
        let plugin_name = get_plugin_name $plugin_dir
        let plugin_cargo_toml = $"($plugin_dir)/Cargo.toml"

        if ($plugin_cargo_toml | path exists) {
            audit_plugin_cargo_toml $plugin_name $plugin_cargo_toml $nushell_version "custom"
        } else {
            log_warn $"Cargo.toml not found for ($plugin_name)"
            null
        }
    } | compact
}

# Audit single plugin Cargo.toml
def audit_plugin_cargo_toml [
    plugin_name: string
    cargo_toml_path: string
    nushell_version: string
    plugin_type: string
]: nothing -> record {
    let cargo_data = try {
        open $cargo_toml_path
    } catch {
        log_error $"Failed to read ($cargo_toml_path)"
        return {
            plugin: $plugin_name
            type: $plugin_type
            status: "error"
            error: "Could not read Cargo.toml"
        }
    }

    # Get plugin version
    let plugin_version = try {
        $cargo_data | get package.version
    } catch {
        "unknown"
    }

    # Extract nu-* dependencies
    let dependencies = try {
        $cargo_data | get dependencies
    } catch {
        {}
    }

    # Filter to nu-* crates only
    let nu_deps = $dependencies
        | transpose name spec
        | where {|row| $row.name | str starts-with "nu-"}
        | each {|row|
            parse_dependency_spec $row.name $row.spec
        }

    # Check version consistency
    let version_issues = check_version_consistency $nu_deps $nushell_version

    {
        plugin: $plugin_name
        type: $plugin_type
        plugin_version: $plugin_version
        nu_dependencies: $nu_deps
        version_issues: $version_issues
        status: (if ($version_issues | is-empty) { "ok" } else { "version_mismatch" })
    }
}

# Parse dependency specification
def parse_dependency_spec [
    dep_name: string
    spec: any
]: nothing -> record {
    # Spec can be a string (version) or record (detailed spec)
    let spec_type = $spec | describe

    if $spec_type == "string" {
        {
            crate: $dep_name
            version: $spec
            path: null
            features: []
        }
    } else if $spec_type == "record" {
        {
            crate: $dep_name
            version: ($spec | get -i version | default "none")
            path: ($spec | get -i path | default null)
            features: ($spec | get -i features | default [])
        }
    } else {
        {
            crate: $dep_name
            version: "unknown"
            path: null
            features: []
        }
    }
}

# Check version consistency with nushell
def check_version_consistency [
    nu_deps: table
    expected_version: string
]: nothing -> list<record> {
    $nu_deps | each {|dep|
        if $dep.version != $expected_version and $dep.version != "none" {
            {
                crate: $dep.crate
                found: $dep.version
                expected: $expected_version
                issue: "version_mismatch"
            }
        } else {
            null
        }
    } | compact
}

# Display audit results
def display_audit_results [
    results: table
] {
    log_info "\n=== Dependency Audit Results ==="

    # Summary statistics
    let total_plugins = $results | length
    let ok_plugins = $results | where status == "ok" | length
    let issues_plugins = $results | where status != "ok" | length

    log_info $"Total plugins: ($total_plugins)"
    log_success $"Clean: ($ok_plugins)"
    if $issues_plugins > 0 {
        log_warn $"With issues: ($issues_plugins)"
    }

    # Group by type
    let system_plugins = $results | where type == "system"
    let custom_plugins = $results | where type == "custom"

    if ($system_plugins | length) > 0 {
        log_info "\n--- System Plugins ---"
        display_plugin_group $system_plugins
    }

    if ($custom_plugins | length) > 0 {
        log_info "\n--- Custom Plugins ---"
        display_plugin_group $custom_plugins
    }

    # Show detailed issues
    let plugins_with_issues = $results | where status != "ok"
    if ($plugins_with_issues | length) > 0 {
        log_warn "\n=== Plugins with Version Issues ==="
        $plugins_with_issues | each {|plugin|
            log_error $"($plugin.plugin)"
            $plugin.version_issues | each {|issue|
                print $"  • ($issue.crate): found [$issue.found], expected ($issue.expected)"
            }
        }
    }
}

# Display plugin group
def display_plugin_group [
    plugins: table
] {
    $plugins | each {|plugin|
        let status_icon = if $plugin.status == "ok" { "✅" } else { "⚠️" }
        let dep_count = $plugin.nu_dependencies | length

        print $"  ($status_icon) ($plugin.plugin) (v($plugin.plugin_version))"
        print $"     nu-* dependencies: ($dep_count)"

        if ($plugin.nu_dependencies | length) > 0 {
            $plugin.nu_dependencies | each {|dep|
                let path_info = if ($dep.path | is-not-empty) { $" \(path: ($dep.path))" } else { "" }
                let features_info = if ($dep.features | is-not-empty) {
                    $" (($dep.features | str join ', '))"
                } else {
                    ""
                }
                print $"       • ($dep.crate): ($dep.version)($path_info)($features_info)"
            }
        }
    }
}

# Export dependency matrix to JSON
def export_dependency_matrix [
    results: table
    nushell_version: string
] {
    let output_file = "./tmp/dependency_audit.json"
    ensure_dir "./tmp"

    let matrix = {
        nushell_version: $nushell_version
        audited_at: (date now | format date "%Y-%m-%d %H:%M:%S")
        total_plugins: ($results | length)
        plugins_ok: ($results | where status == "ok" | length)
        plugins_with_issues: ($results | where status != "ok" | length)
        plugins: $results
    }

    $matrix | to json | save -f $output_file
    log_success $"Dependency audit exported to: ($output_file)"
}

# Audit single plugin
def audit_single_plugin [
    plugin_name: string
    nushell_version: string
] {
    log_info $"Auditing plugin: ($plugin_name)"

    # Check if it's a custom plugin
    let custom_cargo_toml = $"./($plugin_name)/Cargo.toml"
    if ($custom_cargo_toml | path exists) {
        let result = audit_plugin_cargo_toml $plugin_name $custom_cargo_toml $nushell_version "custom"
        display_audit_results [$result]
        return
    }

    # Check if it's a system plugin
    let system_cargo_toml = $"./nushell/crates/($plugin_name)/Cargo.toml"
    if ($system_cargo_toml | path exists) {
        let result = audit_plugin_cargo_toml $plugin_name $system_cargo_toml $nushell_version "system"
        display_audit_results [$result]
        return
    }

    log_error $"Plugin '($plugin_name)' not found"
    log_info "Available custom plugins:"
    get_plugin_directories | each {|dir|
        print $"  • (get_plugin_name $dir)"
    }
    exit 1
}

# Generate dependency matrix report
def "main matrix" [] {
    log_info "Generating dependency matrix..."

    let nushell_dir = "./nushell"
    if not ($nushell_dir | path exists) {
        log_error "Nushell source not found"
        exit 1
    }

    let nushell_version = get_nushell_version $nushell_dir
    let results = audit_all_plugins $nushell_version true true

    # Create matrix of plugins × crates
    let all_crates = $results
        | each {|r| $r.nu_dependencies | get crate}
        | flatten
        | uniq
        | sort

    log_info "\n=== Dependency Matrix ==="
    log_info $"Nushell version: ($nushell_version)"
    log_info $"Unique nu-* crates: ($all_crates | length)"

    # Show which plugins use which crates
    $all_crates | each {|crate|
        let users = $results | where {|r|
            $crate in ($r.nu_dependencies | get crate)
        } | get plugin

        print $"\n($crate):"
        $users | each {|user|
            print $"  • ($user)"
        }
    }
}