#!/usr/bin/env nu

# Artifact upload tool - uploads distribution artifacts to GitHub/registry
#
# Uploads to:
# - GitHub releases
# - Container registries (Docker Hub, GHCR, AWS ECR)
# - Package repositories (npm, cargo, homebrew)
# - Distribution servers
# - CDN endpoints

use std log

def main [
    --artifacts-dir: string = "packages"        # Directory containing artifacts to upload
    --release-tag: string = ""                  # Release tag (auto-detected if empty)
    --targets: string = "github"                # Upload targets: github,docker,npm,cargo,homebrew,all
    --registry-url: string = ""                 # Custom registry URL
    --credentials-file: string = ""             # Credentials configuration file
    --parallel-uploads = true                   # Upload to multiple targets in parallel
    --retry-count: int = 3                      # Number of retry attempts for failed uploads
    --verify-uploads = true                     # Verify uploads after completion
    --dry-run = false                           # Show what would be uploaded without doing it
    --verbose                                   # Enable verbose logging
] {

    let artifacts_root = ($artifacts_dir | path expand)
    let upload_targets = if $targets == "all" {
        ["github", "docker", "npm", "cargo", "homebrew"]
    } else {
        ($targets | split row "," | each { str trim })
    }

    # Detect release tag if not provided
    let detected_tag = if $release_tag == "" {
        detect_current_release_tag
    } else {
        $release_tag
    }

    let upload_config = {
        artifacts_dir: $artifacts_root
        release_tag: $detected_tag
        targets: $upload_targets
        registry_url: $registry_url
        credentials_file: ($credentials_file | if $in == "" { "" } else { $in | path expand })
        parallel_uploads: $parallel_uploads
        retry_count: $retry_count
        verify_uploads: $verify_uploads
        dry_run: $dry_run
        verbose: $verbose
    }

    log info $"Starting artifact uploads with config: ($upload_config)"

    # Validate artifacts directory
    if not ($artifacts_root | path exists) {
        log error $"Artifacts directory does not exist: ($artifacts_root)"
        exit 1
    }

    # Find available artifacts
    let available_artifacts = find_available_artifacts $upload_config

    if ($available_artifacts | length) == 0 {
        log warning "No artifacts found to upload"
        return {
            status: "skipped"
            reason: "no artifacts found"
            uploads: []
        }
    }

    log info $"Found ($available_artifacts | length) artifacts to upload"

    # Load credentials if provided
    let credentials = if $upload_config.credentials_file != "" {
        load_credentials $upload_config.credentials_file
    } else {
        {}
    }

    # Upload to each target
    let upload_results = if $upload_config.parallel_uploads {
        upload_parallel $upload_config $available_artifacts $credentials
    } else {
        upload_sequential $upload_config $available_artifacts $credentials
    }

    # Verify uploads if requested
    let verification_results = if $upload_config.verify_uploads and not $upload_config.dry_run {
        verify_uploads $upload_results $upload_config
    } else {
        { status: "skipped", verified: [], failed: [] }
    }

    let summary = {
        total_targets: ($upload_config.targets | length)
        successful_targets: ($upload_results | where status == "success" | length)
        failed_targets: ($upload_results | where status == "failed" | length)
        total_artifacts: ($available_artifacts | length)
        upload_results: $upload_results
        verification_results: $verification_results
        upload_config: $upload_config
    }

    if $summary.failed_targets > 0 {
        log error $"Artifact upload completed with ($summary.failed_targets) target failures"
        exit 1
    } else {
        if $upload_config.dry_run {
            log info $"Dry run completed - would upload to ($summary.total_targets) targets"
        } else {
            log info $"Artifact upload completed successfully to ($summary.successful_targets) targets"
        }
    }

    return $summary
}

# Detect current release tag
def detect_current_release_tag [] {
    let result = (do {
        let latest_tag = (git describe --tags --exact-match HEAD 2>/dev/null | str trim)
        if $latest_tag != "" {
            return $latest_tag
        }

        # Fallback to latest tag
        git describe --tags --abbrev=0 2>/dev/null | str trim
    } | complete)

    if $result.exit_code != 0 {
        log warning "No release tag found, using 'latest'"
        return "latest"
    }

    $result.stdout
}

# Find available artifacts to upload
def find_available_artifacts [upload_config: record] {
    # Define artifact patterns by type
    let artifact_patterns = {
        archives: ["*.tar.gz", "*.zip"]
        binaries: ["*-linux-*", "*-macos-*", "*-windows-*"]
        containers: ["*-container-*.tar"]
        packages: ["*.deb", "*.rpm", "*.msi", "*.dmg"]
        metadata: ["checksums.txt", "manifest.json", "*.sig"]
    }

    mut all_artifacts = []

    # Find artifacts by pattern
    for category in ($artifact_patterns | columns) {
        let patterns = ($artifact_patterns | get $category)
        for pattern in $patterns {
            let found_files = (glob ($upload_config.artifacts_dir + "/" + $pattern) | where { |p| ($p | path type) == "file" })
            for file in $found_files {
                $all_artifacts = ($all_artifacts | append {
                    path: $file
                    name: ($file | path basename)
                    category: $category
                    size: (ls $file | get 0.size)
                    modified: (ls $file | get 0.modified)
                })
            }
        }
    }

    return ($all_artifacts | uniq-by path)
}

# Load credentials from configuration file
def load_credentials [credentials_file: string] {
    if not ($credentials_file | path exists) {
        log warning $"Credentials file not found: ($credentials_file)"
        return {}
    }

    let result = (do {
        open $credentials_file
    } | complete)

    if $result.exit_code != 0 {
        log warning $"Failed to load credentials: ($result.stderr)"
        {}
    } else {
        $result.stdout
    }
}

# Upload artifacts in parallel
def upload_parallel [
    upload_config: record
    artifacts: list
    credentials: record
] {
    # For simplicity, using sequential for now
    # In a real implementation, you might use background processes
    upload_sequential $upload_config $artifacts $credentials
}

# Upload artifacts sequentially
def upload_sequential [
    upload_config: record
    artifacts: list
    credentials: record
] {
    $upload_config.targets | each {|target|
        upload_to_target $target $artifacts $upload_config $credentials
    }
}

# Upload artifacts to a specific target
def upload_to_target [
    target: string
    artifacts: list
    upload_config: record
    credentials: record
] {
    log info $"Uploading to target: ($target)"

    let start_time = (date now)

    match $target {
        "github" => { upload_to_github $artifacts $upload_config $credentials }
        "docker" => { upload_to_docker $artifacts $upload_config $credentials }
        "npm" => { upload_to_npm $artifacts $upload_config $credentials }
        "cargo" => { upload_to_cargo $artifacts $upload_config $credentials }
        "homebrew" => { upload_to_homebrew $artifacts $upload_config $credentials }
        _ => {
            log warning $"Unknown upload target: ($target)"
            {
                target: $target
                status: "failed"
                reason: "unknown target"
                artifacts_uploaded: 0
                duration: ((date now) - $start_time)
            }
        }
    }
}

# Upload to GitHub releases
def upload_to_github [
    artifacts: list
    upload_config: record
    credentials: record
] {
    log info $"Uploading to GitHub releases..."

    let start_time = (date now)

    if $upload_config.dry_run {
        return {
            target: "github"
            status: "success"
            artifacts_uploaded: ($artifacts | length)
            dry_run: true
            duration: ((date now) - $start_time)
        }
    }

    # Check GitHub CLI availability
    let gh_result = (do { gh --version | complete } | complete)
    let gh_check = if $gh_result.exit_code == 0 { $gh_result.stdout } else { { exit_code: 1 } }
    if $gh_check.exit_code != 0 {
        return {
            target: "github"
            status: "failed"
            reason: "GitHub CLI (gh) not available"
            artifacts_uploaded: 0
            duration: ((date now) - $start_time)
        }
    }

    # Filter artifacts suitable for GitHub releases
    let github_artifacts = ($artifacts | where category in ["archives", "packages", "metadata"])

    let upload_result = (do {
        mut upload_errors = []
        mut uploaded_count = 0

        for artifact in $github_artifacts {
            let result = (do {
                if $upload_config.verbose {
                    log info $"Uploading to GitHub: ($artifact.name)"
                }

                gh release upload $upload_config.release_tag $artifact.path | complete
            } | complete)

            if $result.exit_code != 0 {
                $upload_errors = ($upload_errors | append {
                    artifact: $artifact.name
                    error: $result.stderr
                })
            } else {
                $uploaded_count = ($uploaded_count + 1)
            }
        }

        { errors: $upload_errors, count: $uploaded_count }
    } | complete)

    let upload_errors = (if $upload_result.exit_code != 0 { [] } else { $upload_result.stdout.errors })
    let uploaded_count = (if $upload_result.exit_code != 0 { 0 } else { $upload_result.stdout.count })

    let status = if ($upload_errors | length) > 0 { "partial" } else { "success" }

    {
        target: "github"
        status: $status
        artifacts_uploaded: $uploaded_count
        total_artifacts: ($github_artifacts | length)
        errors: $upload_errors
        duration: ((date now) - $start_time)
    }
}

# Upload to Docker registry
def upload_to_docker [
    artifacts: list
    upload_config: record
    credentials: record
] {
    log info $"Uploading to Docker registry..."

    let start_time = (date now)

    # Check Docker availability
    let docker_check = (do { docker --version } | complete)
    if $docker_check.exit_code != 0 {
        return {
            target: "docker"
            status: "failed"
            reason: "Docker not available"
            artifacts_uploaded: 0
            duration: ((date now) - $start_time)
        }
    }

    if $upload_config.dry_run {
        let container_artifacts = ($artifacts | where category == "containers")
        return {
            target: "docker"
            status: "success"
            artifacts_uploaded: ($container_artifacts | length)
            dry_run: true
            duration: ((date now) - $start_time)
        }
    }

    # Find container artifacts
    let container_artifacts = ($artifacts | where category == "containers")

    let upload_result = (do {
        mut upload_errors = []
        mut uploaded_count = 0

        for artifact in $container_artifacts {
            let result = (do {
                if $upload_config.verbose {
                    log info $"Loading Docker image: ($artifact.name)"
                }

                # Load container image
                docker load -i $artifact.path

                # Tag and push (would need proper registry configuration)
                log warning "Docker registry push not fully implemented - container loaded locally"
                { success: true }
            } | complete)

            if $result.exit_code != 0 {
                $upload_errors = ($upload_errors | append {
                    artifact: $artifact.name
                    error: $result.stderr
                })
            } else {
                $uploaded_count = ($uploaded_count + 1)
            }
        }

        { errors: $upload_errors, count: $uploaded_count }
    } | complete)

    let upload_errors = (if $upload_result.exit_code != 0 { [] } else { $upload_result.stdout.errors })
    let uploaded_count = (if $upload_result.exit_code != 0 { 0 } else { $upload_result.stdout.count })

    let status = if ($upload_errors | length) > 0 { "partial" } else { "success" }

    {
        target: "docker"
        status: $status
        artifacts_uploaded: $uploaded_count
        total_artifacts: ($container_artifacts | length)
        errors: $upload_errors
        duration: ((date now) - $start_time)
    }
}

# Upload to npm registry
def upload_to_npm [
    artifacts: list
    upload_config: record
    credentials: record
] {
    log info $"Uploading to npm registry..."

    let start_time = (date now)

    # Check for npm packages
    let npm_artifacts = ($artifacts | where name =~ r'\.tgz$')

    if ($npm_artifacts | length) == 0 {
        return {
            target: "npm"
            status: "skipped"
            reason: "no npm packages found"
            artifacts_uploaded: 0
            duration: ((date now) - $start_time)
        }
    }

    if $upload_config.dry_run {
        return {
            target: "npm"
            status: "success"
            artifacts_uploaded: ($npm_artifacts | length)
            dry_run: true
            duration: ((date now) - $start_time)
        }
    }

    log warning "npm registry upload not implemented - would publish packages"

    {
        target: "npm"
        status: "skipped"
        reason: "not implemented"
        artifacts_uploaded: 0
        duration: ((date now) - $start_time)
    }
}

# Upload to Cargo registry
def upload_to_cargo [
    artifacts: list
    upload_config: record
    credentials: record
] {
    log info $"Uploading to Cargo registry..."

    let start_time = (date now)

    # Cargo publishes from source, not artifacts
    log warning "Cargo registry upload not implemented - would publish from source"

    {
        target: "cargo"
        status: "skipped"
        reason: "not implemented"
        artifacts_uploaded: 0
        duration: ((date now) - $start_time)
    }
}

# Upload to Homebrew
def upload_to_homebrew [
    artifacts: list
    upload_config: record
    credentials: record
] {
    log info $"Uploading to Homebrew..."

    let start_time = (date now)

    if $upload_config.dry_run {
        return {
            target: "homebrew"
            status: "success"
            artifacts_uploaded: 1
            dry_run: true
            duration: ((date now) - $start_time)
        }
    }

    log warning "Homebrew formula update not implemented - would update formula"

    {
        target: "homebrew"
        status: "skipped"
        reason: "not implemented"
        artifacts_uploaded: 0
        duration: ((date now) - $start_time)
    }
}

# Verify uploads
def verify_uploads [
    upload_results: list
    upload_config: record
] {
    log info "Verifying uploads..."

    mut verified = []
    mut failed_verifications = []

    for result in $upload_results {
        if $result.status in ["success", "partial"] {
            let verification = verify_target_upload $result.target $upload_config

            if $verification.status == "success" {
                $verified = ($verified | append $verification)
            } else {
                $failed_verifications = ($failed_verifications | append $verification)
            }
        }
    }

    {
        status: (if ($failed_verifications | length) > 0 { "partial" } else { "success" })
        verified: $verified
        failed: $failed_verifications
        total_verified: ($verified | length)
    }
}

# Verify upload to specific target
def verify_target_upload [target: string, upload_config: record] {
    match $target {
        "github" => { verify_github_upload $upload_config }
        "docker" => { verify_docker_upload $upload_config }
        _ => {
            {
                target: $target
                status: "skipped"
                reason: "verification not implemented"
            }
        }
    }
}

# Verify GitHub upload
def verify_github_upload [upload_config: record] {
    let result = (do {
        let release_info = (gh release view $upload_config.release_tag --json assets | from json)
        let asset_count = ($release_info.assets | length)

        {
            target: "github"
            status: "success"
            verified_assets: $asset_count
        }
    } | complete)

    if $result.exit_code != 0 {
        {
            target: "github"
            status: "failed"
            reason: $result.stderr
        }
    } else {
        $result.stdout
    }
}

# Verify Docker upload
def verify_docker_upload [upload_config: record] {
    # Docker verification would check registry
    {
        target: "docker"
        status: "skipped"
        reason: "verification not implemented"
    }
}

# Show upload targets and their status
def "main info" [] {
    let github_available = ((do { gh --version } | complete).exit_code == 0)
    let docker_available = ((do { docker --version } | complete).exit_code == 0)
    let npm_available = ((do { npm --version } | complete).exit_code == 0)
    let cargo_available = ((do { cargo --version } | complete).exit_code == 0)

    {
        available_targets: {
            github: $github_available
            docker: $docker_available
            npm: $npm_available
            cargo: $cargo_available
            homebrew: false  # Would need brew command
        }
        current_release_tag: (detect_current_release_tag)
        supported_targets: ["github", "docker", "npm", "cargo", "homebrew"]
    }
}

# List artifacts in directory
def "main list" [artifacts_dir: string = "packages"] {
    let artifacts_root = ($artifacts_dir | path expand)

    if not ($artifacts_root | path exists) {
        return { error: "artifacts directory not found", directory: $artifacts_root }
    }

    let config = { artifacts_dir: $artifacts_root }
    let artifacts = find_available_artifacts $config

    $artifacts | group-by category | items {|category, items|
        {
            category: $category
            count: ($items | length)
            total_size: ($items | get size | math sum)
            artifacts: ($items | get name)
        }
    }
}
