package nginx

import (
    "bufio"
    "fmt"
    "strings"
)

func buildComments(orig string, indent int) (content string) {
    scanner := bufio.NewScanner(strings.NewReader(orig))
    for scanner.Scan() {
        content += strings.Repeat("\t", indent) + "# " + scanner.Text() + "\n"
    }
    content = strings.TrimLeft(content, "\n")
    return
}

func (c *NgxConfig) BuildConfig() (content string) {

    // Custom
    if c.Custom != "" {
        content += fmtCode(c.Custom)
        content += "\n\n"
    }

    // Upstreams
    for _, u := range c.Upstreams {

        upstream := ""
        var comments string
        for _, directive := range u.Directives {
            if directive.Comments != "" {
                comments = buildComments(directive.Comments, 1)
            }
            upstream += fmt.Sprintf("%s\t%s;\n", comments, directive.Orig())
        }
        comments = buildComments(u.Comments, 1)
        content += fmt.Sprintf("upstream %s {\n%s%s}\n\n", u.Name, comments, upstream)
    }

    // Servers
    for _, s := range c.Servers {
        server := ""

        // directives
        for _, directive := range s.Directives {
            var comments string
            if directive.Comments != "" {
                comments = buildComments(directive.Comments, 1)
            }
            if directive.Directive == If {
                server += fmt.Sprintf("%s%s\n", comments, fmtCodeWithIndent(directive.Params, 1))
            } else if directive.Params != "" {
                server += fmt.Sprintf("%s\t%s;\n", comments, directive.Orig())
            }
        }

        if len(s.Directives) > 0 {
            server += "\n"
        }

        // locations
        locations := ""
        for _, location := range s.Locations {
            locationContent := ""
            scanner := bufio.NewScanner(strings.NewReader(location.Content))
            for scanner.Scan() {
                locationContent += "\t\t" + scanner.Text() + "\n"
            }
            var comments string
            if location.Comments != "" {
                comments = buildComments(location.Comments, 1)
            }
            locations += fmt.Sprintf("%s\tlocation %s {\n%s\t}\n\n", comments, location.Path, locationContent)
        }

        server += locations

        var comments string
        if s.Comments != "" {
            comments = buildComments(s.Comments, 0) + "\n"
        }

        content += fmt.Sprintf("%sserver {\n%s}\n\n", comments, server)
    }

    return
}