package cmds

import (
	"fmt"
	"os"
	"text/template"

	"github.com/BurntSushi/toml"
)

// sqlBoilerImports defines the list of default template imports.
var sqlBoilerImports = imports{
	standard: importList{
		`"errors"`,
		`"fmt"`,
	},
	thirdparty: importList{
		`"github.com/pobri19/sqlboiler/boil"`,
	},
}

// sqlBoilerTestImports defines the list of default test template imports.
var sqlBoilerTestImports = imports{
	standard: importList{
		`"testing"`,
		`"os"`,
		`"os/exec"`,
		`"fmt"`,
		`"io/ioutil"`,
		`"bytes"`,
		`"errors"`,
	},
	thirdparty: importList{
		`"github.com/BurntSushi/toml"`,
	},
}

// sqlBoilerTypeImports imports are only included in the template output if the database
// requires one of the following special types. Check TranslateColumnType to see the type assignments.
var sqlBoilerTypeImports = map[string]imports{
	"null.Int": imports{
		thirdparty: importList{`"gopkg.in/guregu/null.v3"`},
	},
	"null.String": imports{
		thirdparty: importList{`"gopkg.in/guregu/null.v3"`},
	},
	"null.Bool": imports{
		thirdparty: importList{`"gopkg.in/guregu/null.v3"`},
	},
	"null.Float": imports{
		thirdparty: importList{`"gopkg.in/guregu/null.v3"`},
	},
	"null.Time": imports{
		thirdparty: importList{`"gopkg.in/guregu/null.v3"`},
	},
	"time.Time": imports{
		standard: importList{`"time"`},
	},
}

// sqlBoilerDriverTestImports defines the test template imports
// for the particular database interfaces
var sqlBoilerDriverTestImports = map[string]imports{
	"postgres": imports{
		standard:   importList{`"database/sql"`},
		thirdparty: importList{`_ "github.com/lib/pq"`},
	},
}

// sqlBoilerTemplateFuncs is a map of all the functions that get passed into the templates.
// If you wish to pass a new function into your own template, add a pointer to it here.
var sqlBoilerTemplateFuncs = template.FuncMap{
	"singular":             singular,
	"plural":               plural,
	"titleCase":            titleCase,
	"titleCaseSingular":    titleCaseSingular,
	"titleCasePlural":      titleCasePlural,
	"camelCase":            camelCase,
	"camelCaseSingular":    camelCaseSingular,
	"camelCasePlural":      camelCasePlural,
	"makeDBName":           makeDBName,
	"selectParamNames":     selectParamNames,
	"insertParamNames":     insertParamNames,
	"insertParamFlags":     insertParamFlags,
	"insertParamVariables": insertParamVariables,
	"scanParamNames":       scanParamNames,
	"hasPrimaryKey":        hasPrimaryKey,
	"getPrimaryKey":        getPrimaryKey,
	"updateParamNames":     updateParamNames,
	"updateParamVariables": updateParamVariables,
}

// LoadConfigFile loads the toml config file into the cfg object
func (cmdData *CmdData) LoadConfigFile(filename string) error {
	cfg := &Config{}

	_, err := toml.DecodeFile(filename, &cfg)

	if os.IsNotExist(err) {
		return fmt.Errorf("Failed to find the toml configuration file %s: %s", filename, err)
	}

	if err != nil {
		return fmt.Errorf("Failed to decode toml configuration file: %s", err)
	}

	cmdData.Config = cfg
	return nil
}