#!/bin/bash
# build_config.sh - Build and install configuration for USM and dependencies

# Build order - dependencies must be built in this order
BUILD_ORDER=("invercargill" "invercargill-json" "usm")

# Component definitions
declare -A COMPONENTS=(
    ["invercargill"]="Invercargill|invercargill-1|https://fabrica.unitatem.net/Tilo15/Invercargill.git"
    ["invercargill-json"]="Invercargill-Json|invercargill-json|https://git.sr.ht/~tilo15/Invercargill-Json"
    ["usm"]="USM|usm|BUNDLED"
)

# Component properties accessor functions
get_component_name() {
    local key="$1"
    echo "${COMPONENTS[$key]}" | cut -d'|' -f1
}

get_component_vapi() {
    local key="$1"
    echo "${COMPONENTS[$key]}" | cut -d'|' -f2
}

get_component_source() {
    local key="$1"
    echo "${COMPONENTS[$key]}" | cut -d'|' -f3
}

# Get output redirection based on VERBOSE flag
get_output_redirect() {
    if [[ "$VERBOSE" == "true" ]]; then
        echo "/dev/stdout"
    else
        echo "/dev/null"
    fi
}

# Build function for Invercargill
build_invercargill() {
    local src_dir="$1"
    local prefix="$2"
    local output_redirect=$(get_output_redirect)
    
    pushd "$src_dir" >/dev/null || return 1
    
    # Configure with meson (force libdir=lib for consistency across platforms)
    if ! meson setup src builddir --prefix="$prefix" --libdir=lib -Ddefault_library=static >"$output_redirect" 2>&1; then
        log_error "Failed to configure Invercargill"
        [[ "$VERBOSE" != "true" ]] && log_info "Run with --verbose for details"
        popd >/dev/null
        return 1
    fi
    
    # Build with ninja
    if ! ninja -C builddir >"$output_redirect" 2>&1; then
        log_error "Failed to build Invercargill"
        [[ "$VERBOSE" != "true" ]] && log_info "Run with --verbose for details"
        popd >/dev/null
        return 1
    fi
    
    # Install
    if ! ninja -C builddir install >"$output_redirect" 2>&1; then
        log_error "Failed to install Invercargill"
        [[ "$VERBOSE" != "true" ]] && log_info "Run with --verbose for details"
        popd >/dev/null
        return 1
    fi
    
    popd >/dev/null
    log_info "Invercargill built and installed successfully"
    return 0
}

# Build function for Invercargill-Json
build_invercargill_json() {
    local src_dir="$1"
    local prefix="$2"
    local output_redirect=$(get_output_redirect)
    
    pushd "$src_dir" >/dev/null || return 1
    
    # Set PKG_CONFIG_PATH to find bundled Invercargill library
    export PKG_CONFIG_PATH="$prefix/lib/pkgconfig:$prefix/share/pkgconfig${PKG_CONFIG_PATH:+:$PKG_CONFIG_PATH}"
    
    # Set XDG_DATA_DIRS for GObject Introspection and Vala to find .gir and .vapi files
    # Include default system paths to ensure system vapi files are found
    export XDG_DATA_DIRS="$prefix/share${XDG_DATA_DIRS:+:$XDG_DATA_DIRS}:/usr/local/share:/usr/share"
    
    # Configure with meson (force libdir=lib for consistency across platforms)
    if ! meson setup src builddir --prefix="$prefix" --libdir=lib -Ddefault_library=static >"$output_redirect" 2>&1; then
        log_error "Failed to configure Invercargill-Json"
        [[ "$VERBOSE" != "true" ]] && log_info "Run with --verbose for details"
        popd >/dev/null
        return 1
    fi
    
    # Build with ninja
    if ! ninja -C builddir >"$output_redirect" 2>&1; then
        log_error "Failed to build Invercargill-Json"
        [[ "$VERBOSE" != "true" ]] && log_info "Run with --verbose for details"
        popd >/dev/null
        return 1
    fi
    
    # Install
    if ! ninja -C builddir install >"$output_redirect" 2>&1; then
        log_error "Failed to install Invercargill-Json"
        [[ "$VERBOSE" != "true" ]] && log_info "Run with --verbose for details"
        popd >/dev/null
        return 1
    fi
    
    popd >/dev/null
    log_info "Invercargill-Json built and installed successfully"
    return 0
}

# Build function for USM
build_usm() {
    local src_dir="$1"
    local prefix="$2"
    local output_redirect=$(get_output_redirect)
    
    pushd "$src_dir" >/dev/null || return 1
    
    # Set PKG_CONFIG_PATH to find bundled Invercargill libraries
    export PKG_CONFIG_PATH="$prefix/lib/pkgconfig:$prefix/share/pkgconfig${PKG_CONFIG_PATH:+:$PKG_CONFIG_PATH}"
    
    # Set XDG_DATA_DIRS for GObject Introspection and Vala to find .gir and .vapi files
    # Include default system paths to ensure system vapi files are found
    export XDG_DATA_DIRS="$prefix/share${XDG_DATA_DIRS:+:$XDG_DATA_DIRS}:/usr/local/share:/usr/share"
    
    # Configure with meson (USM's meson.build is at root, force libdir=lib for consistency)
    if ! meson setup builddir --prefix="$prefix" --libdir=lib >"$output_redirect" 2>&1; then
        log_error "Failed to configure USM"
        [[ "$VERBOSE" != "true" ]] && log_info "Run with --verbose for details"
        popd >/dev/null
        return 1
    fi
    
    # Build with ninja
    if ! ninja -C builddir >"$output_redirect" 2>&1; then
        log_error "Failed to build USM"
        [[ "$VERBOSE" != "true" ]] && log_info "Run with --verbose for details"
        popd >/dev/null
        return 1
    fi
    
    # Install
    if ! ninja -C builddir install >"$output_redirect" 2>&1; then
        log_error "Failed to install USM"
        [[ "$VERBOSE" != "true" ]] && log_info "Run with --verbose for details"
        popd >/dev/null
        return 1
    fi
    
    popd >/dev/null
    log_info "USM built and installed successfully"
    return 0
}

# Generic build dispatcher
build_component() {
    local component="$1"
    local src_dir="$2"
    local prefix="$3"
    
    case "$component" in
        "invercargill")
            build_invercargill "$src_dir" "$prefix"
            ;;
        "invercargill-json")
            build_invercargill_json "$src_dir" "$prefix"
            ;;
        "usm")
            build_usm "$src_dir" "$prefix"
            ;;
        *)
            log_error "Unknown component: $component"
            return 1
            ;;
    esac
}

# Install shim to /usr/bin
install_shim() {
    local target_dir="$1"
    local shim_path="/usr/bin/usm"
    local sudo=""
    
    if ! is_root; then
        sudo=$(get_sudo)
    fi
    
    log_step "Installing shim to $shim_path..."
    
    local shim_content="#!/bin/bash
export LD_LIBRARY_PATH=\"${target_dir}/lib\${LD_LIBRARY_PATH:+:\$LD_LIBRARY_PATH}\"
exec \"${target_dir}/bin/usm\" \"\$@\"
"
    
    if [[ -n "$sudo" ]]; then
        echo "$shim_content" | $sudo tee "$shim_path" >/dev/null
        $sudo chmod +x "$shim_path"
    else
        echo "$shim_content" > "$shim_path"
        chmod +x "$shim_path"
    fi
    
    log_info "Shim installed to $shim_path"
}

# Build all components in order
build_all() {
    local src_base="$1"
    local prefix="$2"
    local total=${#BUILD_ORDER[@]}
    local current=0
    
    for component in "${BUILD_ORDER[@]}"; do
        ((current++))
        log_step "[$current/$total] Building $(get_component_name "$component")..."
        
        local src_dir
        
        if [[ "$(get_component_source "$component")" == "BUNDLED" ]]; then
            src_dir="$src_base/usm"
        else
            src_dir="$src_base/$(get_component_name "$component")"
        fi
        
        if ! build_component "$component" "$src_dir" "$prefix"; then
            log_error "Failed to build $(get_component_name "$component"). Installation halted."
            return 1
        fi
    done
    
    return 0
}